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1. _ posture Fig 1 The a2 design of the system Can be seen from chart 1 Power system control system and led to provide power so that it can work properly 2 Control system main STC89C52 SCM as the core the control over the entire lamp normal operation 3 The human detection when a person close to the lamp at a distance of the resulting infrared signal to the control system MCU Lamps automatically turn people leave after a certain distance table lamp automatically turns off Zhang Zhou etc Intelligent Multifunctional lamp 4 Ambient light detection changes in ambient light intensity signal after the analog to digital conversion to control systems control lamp brightness adjust the suitable brightness in order to protect the eye 1 2 Hardware design 1 2 1 Power supply module Power transformer Rectifier bridge and filter supply device LM2596 Composition design simple 220V AC by 2596 switch chip Road v single chip and led power supply circuit in Figure I circuit again by switching power voltage output 12V 5 Figure III switch chip 2596 buck circuit 1 2 2 Human detection module Human detection using infrared thermal release module whose main BISSO001 Which is a relatively high performance sensor signal processing ICS It enjoy to hot release electric infrared sensor and few add ins components can constitute passive hot release electric infrared switch so
2. The calculated total number of pixels of the rectangular area including the area of the smallest rectangle is marked boundingbox the length and width values of horizontal and vertical coordinate values and the number of regions respectively are marked in a custom matrix i Calculate the value of the length and width of the matrix near the center of the cross four coordinate values y Find the coordinates of the center position of the spot is the cross In different regions piecewise interpolation method to do error compensation Distance values obtained with the conversion formula Fig 8 Laser Ranging Flowchart Matlab program used in laser ranging y 215 5 400 x 21 8272 24 8125 29 5936 34 8217 38 3455 42 0771 52 5728 64 5487 73 0343 79 6150 87 7654 94 0528 100 9066 108 3337 115 1659 120 3292 125 9549 129 5712 135 8476 141 9626 147 9923 154 3038 160 5775 165 8763 171 4303 176 0763 180 7522 184 0523 189 5303 193 4214 198 9518 204 6413 209 2538 214 5442 218 7177 223 5045 226 9327 231 9034 f inline a 1 x a 2 a x a nlinfit x y f 1 1 Using piecewise interpolation fitting method for fitting function in turn we can get a 1 a 2 Using the relationship between f and a 1 a 2 and then combining it with 1 2 3 4 formula th
3. Where S is the real time stride length of pedestrian F is pedestrian s real time walking frequency To count the real time walking frequency in the data processing terminal can determine the real time stride length of pedestrian and reduce the travel distance statistical error 4 TEST RESULT AND ANALYSIS Field test result is shown in Figure 6 the test site is the school internal standard athletic field the athletic field included two straight lane one is set form the west to the east and the other is set from the east to the west The fifth lane is chosen and the actual walking length is 430m the actual number of steps is 560 The number of steps measured by dead reckoning is 587 the measured walking distance is 428 5m The relative statistical error of the number of step is 4 8 and the relative statistical error of walking distance 1s less than 1 Compared with the actual route the maximum deviation is 5m appears in the straight lane which is set from the east to the west the deviation interval length is 85m the heading angle measured The English Proceedings of the College of Instrumentation amp Electrical Engineering Jilin University in the Second Half of 2013 error is 2 4 or less It is indicated that the above method designed walker dead reckoning device has a high accuracy timeliness and reliability and meets the needs of practical application Figure 6 the test result schematic 5 EPILOGUE T
4. y FIR low pass filter Show waveforms in GUI diagnose end Fig 8 Flow chart of filtering program 73 The English Proceedings of the College of Instrumentation amp Electrical Engineering Jilin University in the Second Half of 2013 3 3 IMATLAB serial communication We use the communication function of MATLAB to create serial communication and receive real time data through the serial port 15 This design set the serial property as follows baud rate to 9 600 8 data bits 1 stop bit no parity bit 3 3 2 EDR algorithm We use MATLAB to analyze the ECG and extract respiratory signal The spectrum of heart rate and pulmonary respiration waveforms is shown in figure 9 From figure a and b we can see that ECG 1Biimv Oe 5 1620 10 fl SR f Hz a Heart rate waveform iim ha 5 15 20 10 EF fElt s c Pulmonary respiration waveform after the treatment signal frequencies are concentrated in less than 0 5Hz 5Hz But the frequency of human breathing is less than 1Hz and due to that the peak of R wave of ECG signal measured by the electret 1s influenced by breathing processes so we use a EDR algorithm to connect the R wave crest and extract the feature points then interpolate to get the continuous signal finally get lung respiratory signal through the FIR low pass filter 16 17 Figure c and d shows the waveform and spectrum after processing B
5. band voltage gain of low pass filter Ag Ayp 1 App 1 Ry Py The basic formula of the filter circuit such as 5 to 7 Weber 5 Mates 6 99 The English Proceedings of the College of Instrumentation amp Electrical Engineering Jilin University in the Second Half of 2013 Ayp 1 7 Ri Q is quality factor Q 0 707 amplitude frequency When Q 0 707 the amplitude frequency response curve is relatively flat response curve is flat w 100Hz is cut off corner frequency 100Hz This can guarantee signal whose frequency below 100 hz to pass filter the high frequency and achieve the goal of filtering So let Q 0 707 W 100Hz in the above formula We can get a 0 586 RC 0 01 F 560 R1 1K R 100K C 0 1uF 2 1 2 Single chip microcomputer minimum system This design uses a FLASH MCU MSP430F 149 of IT with 16 bits bus Its performance to price ratio is very high It is widely used and features outstand It uses a 16 bit bus unified peripherals and memory addressing and addressing range is 64K It can also It has management and the rich on chip peripheral modules scale out storage a unified interrupt Chip consists of a precision hardware multiplier two 16 bit timer an 8 of 12 AD converter a guard dog 6 P two road USART communication port a comparator a DCO internal oscillator and two external clock It supports 8M clock Single chip microcomputer minimum system Figure 7 will make collected signals
6. data 7 0 Figure 6 Amplitude with cone module design diagram Master control module mainly includes four modules jisuan multiplier divider and bianful which turn the adding cone time data0 and scanning time dadal which are input into a control signal b so as to adjust signals amplitude to add cone through writing in pulse control data dataout generated by b Figure 7 is frequency sweep and adding cone wave simulation diagram As the figure shows at the same time of increasing frequency a cone shaped signal amplitude increases keeps after a period of time and then reduces and the cone wave has certain improving effect on non ideal vibration caused by the rigid contact between 33 The English Proceedings of the College of Instrumentation amp Electrical Engineering Jilin University in the Second Half of 2013 substrate of the source and the ground Em aN M ili Figure 7 frequency sweep plus the cone wave simulation _ diagram 4 THE EXPERIMENT WAVEFORMS AND ANALYSIS 31 Jul TE l 212592 36 Figure 8 Sweep frequency waveform figure Figure 9 Amplitude with cone waveform figure Figure 8 and figure 9 respectively are frequency sweep sine wave and cone wave observed by experiments Through the experiment the signal can output sweep frequency wave whose frequency is ranging from 1 Hz to 2 KHZ frequency step interval is 1 Hz or less and output waveform s amplitude ranging in 0 5
7. 5 Ji C Q Li Y Q Silicon Force Sensor Measuring The Liquid Surface Tension Coefficient and Liquid Stress Membrane Analysis J Technology and Management 2011 28 4 46 48 Experimental 6 Teng J C Chen C P Guo H Adjustment of Piezoresistive Pressure Sensor Signal J Instrument Technique and Sensor 2009 10 360 362 7 Wang M Load Balancing Method of Theoretical Traffic Analysis and Applications J World 2007 5 113 114 Chen Changsong etc Design of Gravitational Acceleration Measuring Device Based on Balance Method 8 Dai C Q The Newton s third law practice J Technology and Physics Teaching 2005 13 4 42 43 9 Liu J F Luo X K Verify Newton s Second law Experiment Force Measurement Methods Were Reviewed J Experiment Teaching and Instrument 1998 2 7 9 10 Kang GH fundamentals of electronic technology M Beijing Higher Education Press 2011 11 418 423 11 Lu Z H The Application of SCM in The Design of Physical Experiment J college physics experiment 2001 4 14 56 57 12 Zhou Y H Xu D S Acceleration of Gravity Measurement and Correct Calculation M college physics experiment 2002 6 18 24 13 Lin Z J Electronic Measurement Techniques M Beijing Electronic Industry Press 2011 11 12 15 14 Cheng D F LinJ Intelligent Instrument M Beijing Mechanical Industry Press 2012 7 42 55 15 Wu X H Sensor and Signal Processing M Beijing Electronic Ind
8. A stranger enteringLoss of valuables Figure 2 temperature respectively Smoke Infrared Valuables alarm message content 64 4 DESIGN RESULT AND ANALYSIS The design of the wireless remote alarm when the measured reflect good and it also can achieve the desired function In the end the text messages which sent to the user s results by mobile phone are shown in figure 3 below And this design has the advantages of low cost and good reliability high precision easy to install But also question the safety of the residents have a good prevention role It can effectively avoid the loss of the user Again due to the system of many functional solve the similar devices on the market of the defect of single function the subsequent market promotion will have very good advantage sane MCU initialization The GSM module initialization Selector switch The valuables detections Pyroelectric detectione Temperature Smoke detection detection Y J A buzzer alarm indicator GSM send text messagese Fnde Temperature and time display Figure 3 Flow chart of system software Reference 1 Sony Ericsson Mobile Communications GR47 GR48 Design Guidelines 2003 2 baidu library HC SR501 specification DB OL Baidu http wenku baidu com view 05a3d684e 53a580216fcfec1 html 3 4 5 JiaoLei etc The dormitory intelligent security alarm system based
9. E Start The system clock LCD1602 AD module I 0 serial port Communication initialization v v v The AD reads the serial yoram Liquid port crystal communica display tion Relay control LCD program opor Relay LCD machine Figure 10 single chip program overall process Voltage signal acquisition greater than the threshold voltage Relay tripping and time delay l Closing The normal work Closing is greater than 1 time Relay tripping and closing stand by power switch Figure 11 Relay control flow chart Displays voltage value at the same time and to compare the measurement of voltage and the voltage 101 The English Proceedings of the College of Instrumentation amp Electrical Engineering Jilin University in the Second Half of 2013 threshold high level of single chip computer control relay disconnect low level controls closed once the voltage buzzer alarm 1602 warning message is displayed Secondary reclosing operation If the measured voltage is lower than the voltage threshold as the recloser relay remains closed as standby power switch relay disconnected Once the measuring voltage over voltage threshold MCU control as the recloser relay disconnected after setting the delay time bu
10. Figure 1 General structure frame figure of the system ig The English Proceedings of the College of Instrumentation amp Electrical Engineering Jilin University in the Second Half of 2013 2 DESIGN OF HARDWARE CIRCUITS OF THE SYSTEM 2 1 Design of temperature collection of hardware circuits The temperature sensor of the single measurement point of the greenhouse selects the numerical temperature sensor DS18B20 DS18B20 has wide temperature measurement scope and high measurement precision The measurement scope of DS18B20 is 55 C 125 C in the scope of 10 85 C the precision is 0 5C 2 DQ port of the temperature sensor connects with the MCU of the system which can be used for testing the change of the temperature for the real time And the circuit is shown in Figure 2 Figure 2 Temperature test hardware circuit figure 2 2 Design of humidity collection of hardware circuits HS1101 HS1101 humidity sensor is the humidity sensor based on Humidity sensor selects electric capacity principle and its relative humidity change and capacity value show the linear rule In the automactic test system the capacity value changes with the change of air humidity Therefore when the change of capacity value is transferred to the change of voltage or frequency the data collection can be effectively done 3 555 integrated circuits consist of oscillating circuits HS1101 humidity sensor is used for oscillating capacity so as t
11. Light cube Embedded operating system 0 FOREWORD AS a more difficult part in mathematics learning three dimensional geometry is very hard for a lot of students especially the students whose imagines of the space 1s poor how to teach the solid geometry is also a troubled to the teachers The blackboard drawing is still imagining the three dimensional graphics on the plane this always has no effects this way also depends on the teacher s knowledge of art By the wood or plastic model you can get good results but these teaching aids once the it is made you can t change them Facing the changing geometry difficult Therefore the development of a new teaching aids have become very appearance is rather necessary As a new generation of light sources LED with its cheap price long life high energy efficiency gradually walks in the people s production and life Using the LED as the basic unit of a three dimensional matrix 2 through the PC control certain lights on or off the matrix can show the complex three dimensional pattern It not only can show the common variety of three dimensional graphics you can also customize the complex three dimensional graphics This teaching method can greatly facilitate the students to learn improve learning efficiency Because you can define a variety of graphics on the matrix the need to buy a variety of different shapes of teaching aids cost is reduced save a lot the teaching expenses
12. Teaching auxiliary Vb programming 1 THE HARDWARE STRUCTURE e E E a T r l iHi A mapi pmana 4 g lomos tH iit l WILD id t Figure 1 Hardware schematics The hardware consists of PC control software the slave controller decoder circuit light cube matrix the host machine is mainly used to send operational instructions slave controller commands sent to the host computer after translation into the translation code circuit decoding circuit send the data into the light cube matrix to display Control Command PC software Slave controller Date dosplay Display control Light cube Decoder circuit Figure 2 System Block Diagram 2 SOFTWARE DEVELOPMENT 2 1 PC software 85 The English Proceedings of the College of Instrumentation amp Electrical Engineering Jilin University in the Second Half of 2013 PC software is written by Microsoft VB6 0 VB6 0 tool that object oriented programming It has friendly software is a visual programming supports interface has high speed programming can generate executable program independent from the development environment directly PC control interact with the user by setting the various buttons the user clicks the button to achieve the corresponding functions to control the LED matrix a Shape button match to a real LED The mouse clicks and move set the Click and Mov
13. 3 3 Cone module design Because of the rigid contact between substrate of the source and the ground if the signal amplitude is too large the effect of the shock vibration is not ideal So it is hoped that the generated signal s amplitude can gradually change to satisfy the requirements Based on the design s requirements amplitude tapering design 1s in need compares adding cone time with Module design is mainly implemented by master slave control module The main module based on the analysis clk INPUT scanning time determines the start of adding cone steady output the moment of the end of adding cone and cone stepper control word and transmits the control signal and data transmission to the adding cone execution module for the design of amplitude and adding cone Lct mult1 divde1 bianf u1 dataout 7 0 UTPUT o 7 0 clk b clock dataa 7 0 result 17 0 jjsuan nsigned multiplication 1000 numer 17 0 quotient 17 0 denom 7 0 clock Numer is UNSIGNED is UNSIGNED Pipeline length of 1 4 clk data0 3 0 data1 3 0 dataoutO 7 0 dataout1 7 0 inst16 inst20 data0 3 0 data1 3 0 Coe ea mult1 result 17 0 Unsigned multiplication inst15 clock dataa 7 0 1000 inst18 remain 7 0 m a dataout 7 0 b j few 17 0 c ag few 17 0 datain 7 0 few1 17 0 datain 7 0 inst22 inst23
14. information to the MCU when it detect the water Then the MCU module classifies and treat the sensor will send the water level 121 The English Proceedings of the College of Instrumentation amp Electrical Engineering Jilin University in the Second Half of 2013 information to judge the water level and control the GSM to send alarm message The LCD screen display the water level instant Discontig uous Reflected Liquidome ter Sensor Figure 1 Fundamental Structure 2 THE HARDWARE DESIGN 2 1 The design and manufacture of the discontiguous reflected sensor Seen in Figure 2 the schematic diagram shows the theory of the discontiguous reflected sensor when the laser diode send laser toward the liquid surface as a certain angle the reflection happened The reflected laser spot will move toward the laser diode parallelly as with the rising of the liquid On the other hand if the liquid level drops the laser spot will move closer to the laser diode parallelly The photoresistances are set on the trajectory of the spot linearly to perceive changes in light intensity By measuring the logic level of the photoresistances we can know the difference of the liquid level Figure 2 Collecting Theory However the diffuse reflection of the laser and other light source cause interference so that the photoresistance can t be used as the device to measure the liquid individually To meet the requirements of and high
15. mv te 100 0 e a 100 50 0 Si SE f Hz b The spectrum of heart rate signal 250 200 150 tmv 100 te 50 0 100 50 0 si He f Hz d Pulmonary respiration spectrum after the treatment Fig 9 Waveform and spectrum of Heart rate and pulmonary respiration 3 3 3 Processing of nasal respiratory signal The nasal respiratory signal enlarged by hardware has relatively small interference so only needs to be filtered in the MATLAB by FIR low pass filter 3 3 4 Diagnosis and visual interface displays According to the definition of syndrome we ERAR SHE SOF OA BTO4 081A B04 08 gt fa 1A002040 6 ABT O4 0 5 7 EFOS08 gt jW SR lia Fih FIRE SARA 0 X FRESHA i 7 BK 0 s Tala Ste Arb aR F AR REFR use MATLAB to calculate the number of apnea per night and analyze the condition preliminarily The It has mode selection diagnosis respiratory GUI visual interface is shown in figure 10 three parts waveform display 16 18 At ialt s L L L L L L 4 L 0 2 4 6 8 10 12 14 16 At ialt s Fig 10 Visual interface 74 Xu Li xia etc Development of early detection instrument for apnea syndrome 4 CONCLUSION The early detection instrument is a system for detecting human sleep apnea condition based on respiratory signal extraction SD card storage Bluetooth technologies The system can achieve a wireless and
16. principle of successive approximation to analog digital conversion device It is equipped with an 8 channel multiplexer which can be latched by the address code to decode the signal whic is selected in 8 analog input signal As the measuring instrument have three component signal input so except three way signal processing we also need three way A D conversion ADC0808 has sufficient accuracy fast Yuan Guiyang etc Office computer displayer of electromagnetic radiation measure and alarm system slew rate and can be selected by the address bits to complete multi channel input it 1s the best choise of measuring instrument ADC0808 connection circuit shownin Figure 4 INO L A IN1 IN2 ie 7 EOC IN4 a IN5 0D INS IN7 Lae 8d ADD A n z ADD B 7 ADD C ALE oe aii 3 lt VREF aioe VREF ADC0808 lt TEXT gt Figure 4 ADC0808 3 4 MCU control part STC89C52 is produced by STC It is a low power high performance CMOS8 bit microcontroller with 8K bytes in system programmable Flash memory STC89C52 use the classic MCS 51 core but do a lot of improvements which the traditional 51 single chip don t has On a single chip with a deft 8 bit CPU and in system programmable Flash making STC89C52 for many embedded control applications provide highly flexible ultra effective solution Due to the low cost and flexible practicality the measuring instrument using this chip for data processing and alarm ST
17. the wireless transmission distance is 94m and transmission delay time is less than 1 87 ls Key words Instrument and meter technology wireless Synchronous prediction model superficial seismic exploration data acquisition Analog to digital conversion Wireless synchronization INTRODUCTION SHALLOW seismic exploration is the use of special detection equipment record the artificial excitation seismic reflection and refraction wave travel time amplitude waveform in order to analyze and judge ofa geophysical method formation interface of geotechnical and geological structure 1 2 Shallow seismic exploration instruments are precision and key equipment for the most shallow seismic prospecting 3 And the synchronization precision of data acquisition and wireless transmission technology has become an the shallow prospecting instrument The measurement precision of important index to measure seismic tme synchronization directly influences the quality of seismic observation records is required for seismic data analysis and inversion of seismic wave valuable data 4 With the poorand the exploration of shallow seismic exploration environment of the expansion 5 the cable telemetry seismic instrument mainstream in some degree it is difficult to meet the actual needs and requirements of shallow seismic exploration instrument must be light 6 Radio telemetry seismic instrument not only reduces the field work burden but also
18. trapped in current situation in order to choose the rescue package also can give trapped persons psychological comfort stimulate the trapped persons fight to survive with rescuers implement effective relief The robot USES the advanced modular assembly technology have the ability carries out multiple tasks at the same time Set of powerful functions in one of the robot has the very strong development potential and market competitiveness can well meet the upgrade improvement for subsequent does not affect the subsequent use 10 3 THE DESIGN OF ROBOT SOFTWARE Robots are installed on the wireless module receives the control signals sent from the upper machine further recognition of these control signals and make the corresponding action including walking robot and the lamp switch At the same time robots are installed on the pyroelectric body detection module and a photoelectric switch can real time monitor the life information and obstacles and further back to the PC The software system flow chart shown in figure 4 68 WIARE i AKR fa SAA N N BEA Ri a Bei BEB PRS RIE gt MIER v EZAN gt lt N N Y Y ITEE ENTF FXR Fig 4 Robot software system flow chart 4 DESIGN OF UPPER MACHINE PC running in monitoring station of PC operation using V
19. waiting for the next shaking signal 109 The English Proceedings of the College of Instrumentation amp Electrical Engineering Jilin University in the Second Half of 2013 Figure1 The basic structure of damping device 2 2The design of control circuit We can see from the basic structure of damping device that the coil needs a current to produce a resistant force But in fact it is unknown when a shaking signal comes If the coil switches on all the time it will not work long and it is a waste of power The control circuit is designed to make the circuit works when the shaking signal comes In order to achieve the goal three schemes are brought about Scheme I and Scheme II produce a trigger signal by the induced electromotive force Scheme II use a trigger switch to produce a signal More details will be stated later 2 2 1 Scheme I The circuit of Scheme I can be summarized as a electromagnetic induction and electromagnet switch control circuit Figure2 is the circuit of Scheme I ame eT rO O it VV YY E gt z z Figure2 electromagnetic induction and electromagnet switch control circuit The form of Scheme I and statement for the theory From left to right the whole circuit 1s divided into shaking sensitive part three parts They are electromagnet switch part and outer power supply part Fix the cantilever on a base the base is fixed on the circuit board On one side of the cantilever is a m
20. 1 Second one is inductive card attendance system It s advantage is fast convenient reusable But it can t avoid cheating of checking For these problems we have designed an attendance system based on RFID It combined abortion statistics 48 collect information of students Then the information of students will be sent to the PC After that the PC analyze and organize data The students score will be given automatically at last It eliminates the burden of statistic scores manually So that teachers can be more easily and quickly to check class attendance The system can avoid cheating of checking and identify the students who are cheating by abortion statistics module 2 1 MEASURING PRINCIPLE 1 1 Principle of Beam infrared sensor NPNstyle palm P black s_ T DZ A ee blue ____ Fig l Sensor model diagram System uses PIH T12NO NC3MD M12 beam infrared sensor Its working voltage is 10V to 30V and Li Jiaoyang etc The Design and Implementation about attendance system used in campus classroom based on RFID technology Output current is 200mA The sensor s detection distance up to 6m and its Response time is less than Sms The sensor have the work lights which lights when object is detected on the back of the sensor The output of this photoelectric switch uses NPN type transistor open drain output mode The black line of the module is the collector of the transistor We link a IK re
21. 2010 38 24 217 221 9 Lal Wang Tikui Guo Jianqiang Gao Xiaorong Li Wang Adaptive auto reclosure in combination with relay protection J modern electronic technology 2011 34 16 126 129 10 Liu Xin saying auto reclosing J rural electrician 2009 5 33 11 HE Qiao DUAN Qingming QIU chun ling Theory and Microcontroller Microcontroller Applications M Beijing China Railway Press 2004 3 104 12 XieGuangrun Power system over voltage M Beijing Water Power Press 1985 13 GaoLiang Microcomputer relay protection of power system M Beijing China Electric Power Press 2007 14 ian Ji Cao Junbiao Wang Fulin Protection experiments Device J Jilin electrification College Department of Automatic Control 15 Guo Panfeng Design and research of wireless ECG data transmission based on _ Zigbee protocol J Anhui University 16 Wei Mingbao Li Xiaomei New computer protection device hardware and software J Shandong University of Science and Technology 17 Tan Haoqiang C programming third edition M Beijing Tsinghua University Press 2005 7 18 Wang Haixia Design of single chip microcomputer and PC serial communication J the school of Weifang Wang Di etc The Design and Implementation of Electromagnetic Radiation Detector The Design and Implementation of Electromagnetic Radiation Detector Wang Di Ren Tian ming Jiang Ming jie College of Instrumentation amp Electrical
22. 3 Sound detection and cipher lock module Users can send a message to the cell phone or QQ information to Bell and using digital recording sound detection times start code lock number of sound detection can be set by users themselves it increases security Then sends the signal to the MCU startup password lock password lock preset password is stored in 24C04 When a user with no key can start code lock unlock can use any cell phone and home phone to communicate At the same time users can also lock startup password in business trip or long term absence to further strengthen the anti theft function 3 HARDWARE DESIGN AND IMPLEMENTATION Hardware design including master control system and the external control system Master system includes infrared sensing components and the smallest single chip microcomputer system parts Perimeter control systems include the relay code lock with counter display and the driven parts and sections Which also include a design section 3 1 Power supply design Design output of 5V power supply for doors and Windows phone keypad control module the sensor module sound detection and code lock module to provide power The design circuit in Figure 3 Fig 3 power supply circuit 3 2 The main control system circuit design Infrared sensing portion it tube using infrared sensors the transmitting and receiving of maximum distance of up to 8 m and indoors under natural light an accura
23. 49 86 1D ono 9s 45 Measuring distance m 25692 92 Delay time s 366 50 523 11 752 16 965 25 2740 33690 50000 We can conclude from the actual test datain the table the same transmission distance open environment delay time is much smaller and with the increase of wireless transmission distance time delay and more obvious difference in different environment In addition close to the transmission distance limit in any kind of environment the delay time will be greatly increased In view of thesystem is the hammer of synchronous source generally for signal transmission in short distance does not apply to thelimit so the delay time for the microsecond level in line with the actual application requirements and seismic instrument increase the compensation Ability ifneedcan transmission distance by using high gain antenna 5 CONCLUSION Shallow seismic exploration instrument transmission mode and the power consumption directly affects the performance ofthe portable instrument and field work time using wireless replace wired overcomes exploration environment complex wiring problem high integration and low power ADC module and the wireless transmission module not only simplifies the hardware structure of the system making the system more simple and portable also helps to improve work efficiency increase working time reduce the delaytime addition using self calibrationand self detection function of
24. E E ENA E T YangShuXin LiuYang LengShuZhe 77 Wireless multi point temperature and humidity detection system design based on nRF24L01 ee ccccceeeeeeeeeees EAE E Rae AE ict HR wR Cease a cect alee ee E E Wu Jindi Song Qihan Zhao Xiaoyi 81 The tcachine auxilary system based on the lighteu beseer eA A A ee eae EEE AEE EE E I E P EE A EEE E E E E E A E E EE E Xin Yi Zhu Zhanshan Chen Xu Jiang Jian 85 Intelligent alarm system based on MMS c ce ceeeeeeeeeeeeeeeeeseetsssssssssseeeeaes Zhang Yixuan Zhou Xianze Liu Yan 88 The calculation of mutual inductance of two polygons with multiturn coils at arbitrarily position c0000eeeee OLER LL ae ag ee ei ea rn alae aaa nants ania sa aaa aly LiuYang HeShengmin 92 Design and Realization of a Secondary Reclosing Microcomputer Device Remotely and Interactively Controlled EEEE AE sted tines dae eased tsa AEN EEEE EAA E Wang Di Ren Tian ming Jiang Ming jie 105 The manufacture and simulation for electromagnetical damping of fiber detector cccccceeesesesesssssesesssesesesseeaes EEEE E EEE E EEE EE EE EAE AEEA Jiang Ransong Zhou Rui Xue Bixi 109 ites arias texted eee E eee Li Suyi Wang Duogiang Bai Yang Zhang Weijie 121 Office computer displayer of electromagnetic radiation measure and alarm SysteM ccccceeeseseeeeeeseeesseessseseeees eee ee eee ae E ere E ee ee E mer oF eRe eee ee te ee eer Yuan Guiyang Shen Chunyang Liu Gucheng 127 The Mu
25. E RV2 e him a ES i Em E E EE E LOD12344 Figure 5 12864 Liquid crystal pinout 3 SOFTWARE DESIGN The design of electric circuit software is composed of the upper and lower marchine that both are matched with the system of hardware The structure of upper machine includes the initialization of the system of wireless received module and the received program The system of wireless received module can judge the received data by the design of the received program When the wireless received module finally judged the data it will put the data from the binary system into the decimal system and send the final data to the LCD through the program The structure of upper machine includes the initialization of the system of mps430F149 and the AD model that surfaced on the chip The AD model can switch the analog signals into the digital signals and judge whether the process of switch finished or not through the program If the analog signals become the digital signals the AD model can send the digital signals to the wireless transmitted module Then the wireless transmitted module sends the digital signals to the upper machine 107 The English Proceedings of the College of Instrumentation amp Electrical Engineering Jilin University in the Second Half of 2013 through a program begin System clock initialization AD conversion Determine ifthe conversion is completed system clock Initializa
26. Engineering Jilin University Changchun Jilin Province 130001 Abstract This paper describes an approach of electromagnetic radiation detector based on MSP430F149 the instrument uses a conventional antenna for the sensor by the filter amplifier AD modules and nRF905 wireless module and the 12864 LCD module Various points transmit the measured data through the wireless module the final summary via LCD display interface implementation Available on the market capable of electromagnetic radiation detector operating under artificial point is detected to detect electromagnetic radiation but the detection must be manually turned on because of the human factors it can t achieve the real time detection point is detected Meanwhile in the detection point is large the current detector can be sequentially detected the summary of a plurality of data can t be displayed This mode of operation will waste manpower to a certain extent reduce the efficiency of detection of electromagnetic radiation This paper presents a multi point simultaneous measurement and display of the measured data aggregation electromagnetic radiation detector design ideas and methods This paper details the hardware circuit design of the instrument composition and related software module debugging results and the final experimental results show Keywords microcontroller electromagnetic radiation wireless transmission real time display 0 INTRODUCTIO
27. In order to make the valve open and close normally We use spring and chute of a mechanical transmission mechanism Setting the stomatal patch radius of 2 cm ventilation tube bottom radius of 5 cm the workbench system mechanical diagram is shown in figure 4 a E a STH ij d ome y m J k 11 4 1 1 1 f a H AAs eee e HUNE Ws S TSS rUERUD AR i P j u ase BAR U Fig 4 Mechanical figure of table system Pressure control system of the workbench design has the following characteristics 1 mechanical aspects By connecting pneumatic valve with one end of the spring and connecting the other end with the chute fixed end the valve is to provide a guide chute and avoid drawing phenomenon to appear the valve because of the stepper motor rotation 2 Controlling aspects the reasonable design of the stomatal patch radius and ventilation tube base radius make sphere lifting height and motor rotation angle a linear relationship We can control sphere lifting height by motor more easily 1 3 height measurement module design System uses the ultrasonic ranging methods The method mainly emits ultrasonic to a certain direction by ultrasonic emitter in the moment of timing starts at the same time The ultrasonic wave in air immediately encounter obstacles on the way back the receiver receive the reflected wave and immediately stop timing 6 The speed of the ultrasonic pro
28. LED driver circuits are connected to LED lights array in each partition Fig 3 System hardware circuit 16 2 3 Measuring circuit module This design uses BH1750FVI an integrated circuit for two wire serial bus interface digital light intensity sensor This integrated circuit can adjust the brightness of lights according to the collected light intensity data Taking advantage of its high resolution it can detect a wide range of light intensity 5 It has a spectral sensitivity of vision closed to human s eyes which has a wide measuring range and high precision equals to 11x 655351x and other features Its internal circuit includes an A D converter and a signal transmission circuit The diagram of the measurement circuit is shown in Figure 4 D1 is the sensitive element of the module through the pre operational amplifier and filter and then through a 16 bit A D converter the output signal is converted to digital signal and finally through IIC protocol the signal is connected to the output terminal The sensor module contains an internal 3 3V power regulator which can remove 50Hz 60Hz light noise then a stable light intensity measurement can be achieved AD1 N lt Q Logic HliC Interface a Ay O VU Vv 2 osc Fig 4 Measuring circuit schematics 2 4 LED driver module As is shown in Figure 5 port 1 is connected to the I O port extended by LED driver module using the switching characteristic o
29. NNW CO tr att Om Oa trtaA tne Sceeognene eon gp ePeeaegenw yon Gs 90OKMTonooeoN Hoa M OMQonNnoaoodno NADAMO N NtTReagaAR 6 a a a N N MNAM mM y q nN m g Figure 7 Results of Different mass Nonmagnetic Iron Ball Change nonmagnetic iron balls mass appropriately measuring the gravitational acceleration value as shown in figure 7 Do summation average income groups of data and compares to the regional gravitational acceleration Then calculate the absolute error and relative error Table 1 Analysis of Different mass Nonmagnetic Iron Ball relative absolute error m s 2 Measuring g m s 2 Changchun area g m s 2 error 13 9 8109 9 8066 0 0043 0 044 3 2 Error Analysing 14 15 3 2 1 System Error Analysis 1 The main error caused by the pressure sensor sensitivity error s1 0 05mV mm The resulting system local error el 1 22 10 5m s 2 13 non linear error s2 0 02 The resulting system local error e2 1 96 10 3m s 2 14 Zero temperature error s3 0 03 10 C The resulting system local error e3 2 94 10 4m s 2 15 2 The main error caused by the A D converter linear error s4 0 012 FSR The resulting system local error e4 1 18 10 3m s 2 16 Gain temperature coefficient max s5 25 10 6 C The resulting system local error e5 7 35 10 9m s 2 17 Imbalance temperature coefficient max s6 7 10 6 C The resulting system local error e6 2 06 10 9m s 2 18 Vo
30. Optoelectronic Solutions Inc TSL2560 TSL2561 Light To Digital Converter 2005 5 YangMinghui YangPeng ShiWangwang L2561 ba sed wireless Light Intensity Sensor Node Design MCU and Embedded System Application 2010 6 6 LeYan YaoShanglang Android Development Entry and Practice Beijing People s Post University 2009 79 The English Proceedings of the College of Instrumentation amp Electrical Engineering Jilin University in the Second Half of 2013 7 Guo Hongzhi Android Application Development Context M Beijing Electronic Industry Press 2010 8 Jiang Yan Xu Yan Design of DS18B20 based Multipoint Circuit Measuring Instrument J Journal of Daqing Normal University 2009 29 6 20 22 9 Li Guoping Wu Hatyan Application Research of the Implementation of C51 on I2C Bus Fujian Computer 2006 9 168 182 80 Wu Jindi etc Wireless multi point temperature and humidity detection system design based on nRF24L01 Wireless multi point temperature and humidity detection system design based on nRF24L01 Wu Jindi Song Qihan Zhao Xiaoyi College of instrumentation and electrical Engineering Jilin University Changchun China Abstract This project proposes a design of environmental temperature and humidity monitoring system based on wireless sensor Nrf24101 The scheme is based on nRF24L01 to design a wireless temperature acquisition system The system adopts low power high performance microcontroller
31. PA UCADTAOIUC ADES PASHUCADRXO UCALEOM PESAS PASIUCAITAOIUC AISI PATUCATRXOUCA TOM PESAS PETATEVGN Figure 2 circuit of radiating module 2 2 receiving portion Receiving module PCB wireless module LCD circuit LCD is controlled by parallel port wireless module connect to serial includes MS430F 149 port receiving module circuit show as figure 3 LCD1 AMPIRE128X64 P1 0 TACLK CAOUT P1 1 TAO P2 0 ACLK CA2 P2 7 TAO CA7 P3 0 UCBOSTE UCAOCLK P3 6 UCA1 TXD UCA1SIMO XT2OUT XT2IN P5 0 UCB1STE UCA1CLK P2 1 TAINCLK CA3 P5 1 UCB1SIMO UCB1SDA P2 2 CAOUT TAO CA4 P5 2 UCB1SOMI UCB1SCL P5 3 UCB1CLK UCA1STE P6 0 AO P3 1 UCBOSIMO UCBOSDA P6 1 A1 P3 2 UCBOSOMI UCBOSCL P6 2 A2 P3 3 UCBOCLK UCAOSTE P6 3 A3 P3 4 UCA0TXD UCA0SIMO P6 4 A4 P3 5 UCAORXD UCAOSOMI P6 5 A5 6 6 A6 P3 7 UCA1RXD UCA1SOMI P6 7 A7 SVSIN VEREF VREF RST NMI VREF VEREF TCK XIN Figure 3 circuit of receiving module 3 SOFTWARE DESIGN Software includes receiving portion and radiating portion 3 1 radiating portion Tasks of radiating portion are people counting GPS Map speed measurement send data flow chart of radiating portion show as figure 4 12 Close watchdog Timer init Serial port init Send data Send GPS data Figure 4 flow chart of radiating portion 3 1 1 people counting module people counting module consist of red outside to the tube it s output voltage is high w
32. Speed and steering angle measurement interface board to complete two tasks incremental encoder signal waveform adjustment and steering measuring circuit voltage conversion 2 3 DC motor drive control circuit DC motor drive circuit is mainly used to control the DC motor rotation direction and speed of rotation You can turn through changing the voltage across the DC motor to control the motor And control the speed of DC motorhas a different scheme the conventional method is the use of PWM control Drive circuit directly select infineon full of high power drive chip BTS7960 H bridge driver module Motor drive principle diagram as shown in figure 5 Fig 5 Schematic diagram of motor drive 3 SYSTEM SOFTWARE DESIGN Car slowly forward Start the automatic parking systen Vehicle straight ee eee Search for n i i i parallel parking Parallel parking Fig 6 System software flow chart The design of automatic parking system model starting the automatic parking system choose the vertical parallel and oblique three kinds of parking mode Ultrasonic Ranging get the vehicle rear axle center coordinates x Fp and body heading angle 0 the input fuzzy controller to control the vehicle 139 The English Proceedings of the College of Instrumentation amp Electrical Engineering Jilin University in the Sec
33. V peak peak is adjustable and can step as 0 1 V peak to peak to adjust The frequency range of the source system signal is 1 Hz 1 5 kHz the big step frequency is 1 Hz and amplitude range is required within 2V so the design of signal source should satisfy the requirement of the signal source system 5 CONCLUSION After analyzing the characteristics of vibroseis system signal signal source based on the FPGA design has the following advantages 1 On the basis of 34 meeting the requirement of accuracy in the source compared with the existing DDS signal source the dependence on the system resources 1s reduced and the cost is lower 2 Because of rich internal resource of the FPGA signals for design according to the actual needs such there are different types of waveform as frequency sweep signal cone signal etc and DDS signal source is more flexible than the existing 3 The existing DDS signal source generates the analog signal in the process of system calibration 1t needs to be sample and quantization to convert them to digital quantity and then do the data processing The process will generate error but the FPGA which generates digital signals can be directly for data processing thus greatly improving the accuracy of the calibration 4 Because the FPGA internal program can be run in parallel and has the ability to deal with complex function it can be integrated into its internal data acquisition part in syst
34. anti interference capability the receiving pipe is used the high resolution high sensitivity It obviously improves performance that is required and can be applied to detect the house leakage The photoresistance 1s mounted in the receiving pipe to dampen the interference caused by the diffuse reflection of the laser and other light source so that the anti interference resolution is improved and the resolution ratio has reached 1 mm The figure 3 is the discontiguous reflected sensor design drawing 122 1 Plastic casing 2 Laser source 3 Receiving pipe 4 Photoresistance Figure 3 Light reflex non contact liquid level detection sensor module schematic diagram 2 2 The MCU Control Module Figure 4 is the schematic diagram of this module As shown in figure 4 a is the angle of incidence H is the height of the equipment h is the water level L is the length of the apparatus x is the displacement of the laser spot on the sensor Figure 4 Signal Processing Module Calculation Principle Diagram The formula derivation process is as follows tan a L 2 H 1 tan a x 2 h 2 x L H h 3 By geometric analysis we can get x L H h The distance of the laser spot is decided by height of the equipment water level the length of the apparatus Once x 1s known the water level is detected In order to detect the water level in time this design uses a linear array of photoresistance array and receiving pipe to r
35. avoid the inherent large line crosstalk antenna interference frequency interference so synchronization wireless portable 7 low power consumption is the keyof system design The more mature and widely used in wireless communication are mainly GPRs WiFi Imote2 Zigbee ultra wideband impulse butcan meet the design requirements of the few such as the GPRS network although can meet the communication distance requirements but the communication speed is low can not meet the requirements of rapid transmission of large amounts of datathe Although WijFicanmeet the transmission but the real environment of radio interference too much can not seismic speed requirements guarantee the accuracy of the data Imote2 can meet the wireless synchronous but complex protocol and is mainly applied to speed 8 Zigbee sensor network are slower and not through a barrier 9 Ultra wideband pulse wireless transmission distance low power consumption and poor anti interference ability dataand low accuracy 10 11 Integrated simple and portable low power and wireless synchronization requirements this study adopts nRF24L01 transmission based on detecting and combined with the wireless moduleto realize wireless AD7705 analog to digital conversion using strain sensor it not only has the real time detection ability and simple hardware good stability software algorithm is fast and efficient thedesignhas important signi
36. can automatically fast opened various white hot lamp and fluorescent and bee Ming players device special applies Yu enterprise and hotel and Mall and warehouse and the family of aisle sensitive regional or for security regional of automatically lighting and lighting special for detection human Through high and low level signal to the MCU to control a lamp lit and snuffed out the circuit as shown Figure IV Signal detection and processing unit 1 2 3 AD Conversion module GND VCC a 20pF 20pF OE i 1 be 2 U2 i P32 1 16 2 4576M 9 AK DGND s 3 ROA lt q MOOUT DIN lt GND 53 4 GS DOUT gt 13 P3 4 IN4007 P3 6 2 RESET DRDY T P3 5 AVDD AGND AGND DARK 7 0 rig ANG REFIN res m ANG REFING lt AD7715 IVCC U3 D D2 rake RI Vin Vout N4007 ae GND 0 luF e r AGND al AGND Figure V ADC module circuit diagram 1 2 4 Illumination module Illumination module using photosensitive resistance and brightness when the outside changes also changes the resistance of the photoresistance Analogsignal afterAD change control system control the brightness of the lamp to change its working principles block diagram is shown in the following gt Resistor down gt PWM down Ls Lamp down Figure VI Schematic diagram of light collection 1 2 5 Position detection
37. communication module the abnormal situation to send to the preset phone number in order to realize the remote monitoring and management of the user JiaoLei etc The dormitory intelligent security alarm system based on GSM wireless communication Hall sensor Pyroelectric infrared sensor Single chip Smoke sensor microcomputer main system GSM communication module Alarm circuit The LCD module display Figure overall structure This system mainly includes the following features 1 real time temperature monitoring This system through the temperature sensor 18 b20 collected information of temperature in the dormitory and then through the microcomputer control output to the LCD And start the information single chip the buzzer when temperature is too high 2 time showing reminders By DS1302 time online according to the current time can effectively remind residents give warm prompt to the user 3 remote monitoring alarm Through the pyroelectric sensor smoke sensor such as real time monitoring of the house will be gathering information through single chip and TC351 communication module to realize the remote communication to inform the user of the house 2 THE HARDWARE DESIGN 2 1 the main control unit module This design adopts 51 series of 89 c51 single chip microcomputer as main control unit AT89CS51 is a low voltage low power consumption high performance CMOS8 a si
38. computer terminal PC and single chip microcomputer system 2 DESIGN AND IMPLEMENTATION 2 1 The hardware design Hardware design mainly refers to the single chip microcomputer system hardware and communication serial parts and it Includes power supply voltage signal acquisition circuit single chip microcomputer minimum system automatic reclosing relay circuit voltage display and alarm circuit and RS232 serial communication circuit Power module supplies power to the circuit Figure 3 Figure 3 The power design circuit Han Si yu etc Design and Realization of a Secondary Reclosing Microcomputer Device Remotely and Interactively Controlled by PC 2 1 1 Voltage signal acquisition circuit Voltage signal acquisition circuit plays an important role in the entire unit Amplification of the circuit anti interference ability and stability directly affect the accuracy of the data collected Voltage acquisition circuit part mainly includes the voltage regulation rectifier circuit filter circuit parts Voltage transformer s primary function makes the mains 220V voltages through transformers transform around 5V AC The voltage regulation part adjusts the size of the ac voltage Then the voltage signals go into voltage regulator parts and rectifiers through a rectifier and export stable DC signal The voltage signal is filtered through the filter circuit It filters the signal waveform of high frequency components and gets small
39. economy more and more families own cars for less experienced drivers in the crowded parking lot parking garage and parking roadside safety problems become more prominent Automatic parking system that by the broad masses of the people concerned has greatly enhanced the parking process accuracy However compared with the automatic parking system research the current domestic research on the automatic parking system is still in the primary stage only a small number of high end car is equipped with automatic parking assist system Design of parking system model to verify the parking control algorithm can provide a theoretical basis for the real vehicle research and development of automatic parking system further the theory is transplanted to the car the automatic parking system to replace the driver to observe and judge to realize the automatic parking place greatly reduce parking accidents thus has certain significance for the design of parking system model 1 THE PRINCIPLE AND ALGORITHM 1 1 The principle of ultrasonic distance measurement The ultrasonic transmission device to the ultrasonic transmitter in one direction at the same time ultrasonic launch open the timer the spread of ultrasound in the air on the way to return immediately encountered obstacles the ultrasonicreflected wave received by the receiver to immediately stop the clock The ultrasonic propagation in the airspeed V and timer recording time t usi
40. electromagnetic fields in engineering application J Beijing China Water Power Press 2010 16 Liu Guoqiang Zhao Lexus JIANG Ji Ya et al Ansoft engineering finite element analysis J Beijing Electronic Industry Press 2005 Kang Pan etc The multi frequency signal generating technology for the shallow surface detection The Multi frequency Signal Generating Technology for the Shallow Surface Detection Liu Chang sheng Kang Pan Xia Zheng yang Zheng Wei College of Instrumentation and Electrical Engineering Jilin University Changchun 130026 China Abstract In this paper in order to meet the requirements of the transmitting signal in shallow surface FEM domain based on the DDS theory using single chip microcomputer and programmable logic device as the hardware control platform realized the universal multi frequency signal generating system This system can produce a single frequency multi frequency dual band tri band sine signal The experiment results show that waveforms produced in this way has good quality pure frequency spectrum and high resolution It can overcome some other methods defects such as the high requirement of stream method to the stability of coil load The pseudo random method can not arbitrarily set the frequency and the THD total harmonic distortion is very high Theoretical simulation and experimental results verify the effectiveness of the method Key words FEM DDS near surf
41. figure Light up Primarily through human distance table lamp judging distances when the person is too close prompted a buzzer sounded circuit as shown in Figure Figure VII Buzzer remind circuit 1 2 6 LED Led driver modules Traditional power LED Power supply mostly 220V Se The English Proceedings of the College of Instrumentation amp Electrical Engineering Jilin University in the Second Half of 2013 AC DC Back again with LM358 Or constant current constant current accuracy of this transistor circuit and overtemperature and short circuit protection features are not output variability is not strong In this design thehighlight LED Highcurrent Highvoltage DC DC Boostconstant current XL6004 C onstant current drive it has a wide input voltage high current output and Schematic diagram is as follows LED DRIVER_XI6004 PWM Figure VII LED lamp driver circuit 1 2 7 Display module 74LS138 Decoder driver 8 Red LED As the system s display to display the lamp brightness level driving liquid crystal display used to display the date and time for the circuit as shown in Figure T LED Figure IX Display circuit 2 SOFTWARE DESIGN 2 1 Work flow chart initializing program Start break y end Figure X Process flow chart MCU Control gathering with closed loop control specific algorithms brightness and environmental PID Al
42. is checking card 2 2 Data Transmission Module NRF24L01 FT232RL level conversion circuit make up the Data wireless transmission circuit and Transmission Module This module transmits student s information from the lower machine to the host computer 8 System s wireless transmission circuit adopts nRF24L01 chip The chip is a single chip RF transceiver chip working at 2 4 2 5GHz ISM band This chip has frequency synthesizer power amplifier crystal oscillator and modulator function modules inside 9 The nRF24L01 chip can achieve point to point and point to multipoint wireless communication It s transmission distance is up to 40 to 50 meters Therefore it can meet the basic requirements System using AT89C52system as the core control module The communication mode between the lower machine and the host computer is 50 multi machine communication mode 10 Multi machine communication s block diagram is shown in Figure 7 FT232RL circuit is a circuit used to achieve the communication between the SCM and Computer serial port This circuit uses the FT232RL chip to change the TTL level into USB 11 The FT232RL circuit is easy stable and can be removed from the external crystal oscillator 2 3 PC Processing Module The host computer uses computer to control and display The host computer automatically statistic and sort out students information and save them into EXCEL spreadsheet In addition the software written by Visual B
43. m m 3 19 118 This equation is hard to solve we can only use matlab to calculate So only solve Scheme II Use the image of the stress of the magnet to fit a straight line here is the data List3 The relationship between x and y from Figurel6 0 071676 After calculation x 34 6125 y 0 0573 E E From X x x we get the following list List4 The variance that used in matching Then can calculate xy look at List5 so Duk 6 5739 A xy 4 1253 After calculation the straight line is y 22 3766 0 6275x From the formula 3 18 we get m kK k k 0 1324 ky m It is not hard to know that the damping ratio cannot 2 reach the requirement of It indicates why the damping phenomenon is not obvious Jiang Ransong etc The manufacture and simulation for electromagnetical damping of fiber detector List5 Some results 4 CONCLUSION The paper put forward a thinking of designing the damping device for the fiber detector and designs three schemes After testing every scheme we get every result of the tests feasible conclusion and ways to improve As to Scheme I because the material and the way we did is not totally correct and the limit of induced voltage it is hard to finish the task Scheme II still uses the induced voltage to be the trigger signal and change the structure It is more feasible than Scheme I The result is that the amplified induced
44. making it switch on It produces a negative pulse when the base turns from high level to low level The negative pulse trigger the circuit by a 0 luF conductor making the circuit turn The relay is absorbed because pin3 outputs a high level 5 Modules debugging Exact information is not found about the process Mainly depends on every withstand voltage and current data of each device attempt using different resistor to the circuit The first step is the combination of the vibroswitch and the delay circuit We can directly connect the output pin of the vibroswitch to the delay circuit because the driving current of the vibroswitch is larger than the minimum of audion base Jiang Ransong etc The manufacture and simulation for electromagnetical damping of fiber detector current The second step is the combination of delay circuit and the load Information shows that when delay circuit is in transient state pin3 outputs high level and more than the driving current is more than 200mA Then decide to add delay coil but it could not work normally The voltmeter shows that it is about 5V in pin3 so maybe the current is not enough Finally it succeeds And the whole combination work is done After adjusting the sensitivity of the vibroswitch then connect the power supply it meet the requirement that is said before Please look at Figurel2 and Figure13 Figure13 Test result after shaking 2 2 4 Comparison among the schemes From th
45. must be placed within the nasal cavity which will affect the breath to a certain extent and also arise discomfort 3 Using a sensor to detect impedance change caused by the pleural motion to acquire respiratory 71 The English Proceedings of the College of Instrumentation amp Electrical Engineering Jilin University in the Second Half of 2013 signal 8 9 But the sensor needs to cling tightly to the chest which would generate a sense of restraint Electret has good characteristics such as a small size simple structure large frequency band width low distortion transient response and low price 10 we select the electret to convert signal place it below the nose to accurately feel the breath and use the stethoscope to feel the respiratory signal without direct contact with the skin of the chest thus reducing discomfort Hardware structure is shown in figure 2 52k DERAT ITE EATA Fig 2 Schematic diagram of the hardware 2 2 Model of sensor network architecture This section consists mainly of basic filtering and amplification circuit using common emitter triode amplifier circuit for preliminary processing Basic circuit is shown in figure 3 Fig 3 The signal acquisition circuit We simulate the signal acquisition circuit by Multisim10 and the simulation result is shown in figure 4 The peak to peak value of the input signal is 100mV and the peak to peak value of the output signal is 450mV We can see th
46. of the College of Instrumentation amp Electrical Engineering Jilin University in the Second Half of 2013 13 Cai Jing A Wearable ECG Monitoring System Based on FAT16 File Format D jlin university 2010 14 Luo Zhi da Yu Xue fei Peng Da ming Medical equipment based on Bluetooth technology design and implementation of communication interface between J Medical and health care equipment 2010 31 2 28 31 15 Gu Xue qiao Cao Yun Xu Yan lin Serial communication based on MATLAB and filtering J Instrumentation Technology 2010 8 17 19 16 Zhao Su wen Jia Lei lei Lu Wang Based on the discussion of extracting respiratory signal from ECG J Journal of guilin aerospace industry college 2012 65 20 24 17 Li Qiang Zhao w Wei MATLAB Data processing and application M beying National Defence Industry Press 20 76 YangShuXin etc Design of nRF905 based Wireless Greenhouse for Environmental Parameters Detection and Transmission System Design of nRF905 based Wireless Greenhouse for Environmental Parameters Detection and Transmission System YangShuXin LiuYang LengShuZhe jilin university instrument science and engineering institute changchun 130061 Abstract Temperature humidity and light intensity are important physical quantities and also the most usual and critical parameters among environmental monitoring Describes a greenhouse for equipment integrated test system based on wireless data transmission temp
47. on GSM wireless communication baidu library MQ 2 specification DB OL Baidu http wenku baidu com view 4bfa221c fad6195f312ba608 html Wu Qing Wu Bo Based on TC351 GSM alarm system design and implementation Microcomputer information 2009 25 1 to 2 Huang Xianshu Engineering data gathering remote monitoring system of GSM short message Microprocessor 2010 6 65 The English Proceedings of the College of Instrumentation amp Electrical Engineering Jilin University in the Second Half of 2013 A post disaster Detection Rescue Robot System Design HU Ru1 fan WANG Hong chao PENG Yi shuai College of insrumentation and Electrical Engineering Jilin University Changchun 130022 China Abstract For the frequent occurrence of natural disasters in recent years the status of the rescue work difficult to design a post disaster relief robot system System is divided into a remote monitoring control station and robotic body Robotic body is equipped with sophisticated sensor systems motion control planning system real time communications and reliable actuators etc mounted night vision CCD camera 512 582 resolution real time images obtained by pyroelectric infrared detection module detects human radiation energy looking upon rescue personnel and designing automatic obstacle avoidance device to prevent the robot collision Remote monitor control station equipped with the corresponding management software thro
48. reduction intelligent transportation system is the only way which is passed in the future if there are enough loose and comfortable bus 1 think people will choose bus but not private car in order to intelligent transportation system people counting and scheduling is very important THE OVERALL DESIGN OF THE PROJECT Transit Passenger Flow Statistics System is Radiating portion is used in the bus to achieve people counting to get the current speed and location by GPS and send the information to the receiving portion receiving portion shows the message by LCD to allow the passenger to choose the best way the overall block diagram show as Figure 1 People counting 430 controller Wireless module 430 controller Figure 1 the overall block diagram 2 ACHIEVEMENT AND ARRANGEMENT OF PARTS 2 1 radiating circuit module Radiating circuit module includes MSP430F169 PCB GPS module radiating circuit and double red 1 The English Proceedings of the College of Instrumentation amp Electrical Engineering Jilin University in the Second Half of 2013 outside to the tube GPS module and wireless module gear into MSP430 by serial port radiating circuit module show as figure 2 2 7 TAD AT PSDUC BI STBUCAICLK PS AUCBISMOMUCHISDA PZZCAOUT TAO As PS UC BISON MUCHISCL PSBUC BIC ate PZDIAG LEGAZ P2ATTANCLEICAG PADUC BOSTEUC ALC LK P3A UC BOSRNOLUC BOEDA PIZZU BOSOM WUC BOSC L PASC BOS LK UCADSTE
49. sending PC real time processing no direct contact detection of respiratory signal and give basic analysis The device has the characteristics of light weight small size low power consumption low cost comfort to wear and so on so as to reduce the economic burden of the patients make it comfortable to sleep at home and at the same time achieving disease monitoring In the next work we need to make the acquisition module integration so as to reduce outside interference and improve the sampling accuracy References 1 LI Su yi YU Xiao YANG Mei ling etal Development of Sleep Apnea Syndrome detection based on Electrocardiography Review and Prospect EB OL http www cnk1 net kcms detail 51 1365 R 20121220 0845 002 html 2012 2 Editorial Board of Chinese Journal of Otorhinolaryngology Head and neck surgery Chinese society of Otorhinolaryngology Head and neck surgery and throat group Diagnosis of obstructive sleep apnea hypopnea syndrome and surgical treatment guide J Chinese Journal of ear nose and throat head and neck 2009 44 2 95 96 surgery 3 Chinese society of respiratory diseases branch of the sleep apnea disease study group Diagnosis and treatment of obstructive sleep apnea hypopnea syndrome guideline draft J Chinese Journal of tuberculosis and respiratory 2002 25 4 195 198 4 Hiestand DM Britz P Goldman M Phillips B Prevalence of symptoms and risk of sleep apnea in the US populatio
50. sensor frames is effective distance apart from the object and the field angle of the light The size of view angle is of positive correlation with the angle of theta produced by axis of camera and axis of the laser projector The received point clouds data is conversed into file of obj format by David laser scanner so that matlab can extract process and storage it and call camera by Matlab for extracting the images and analyzing the distance information obtained with the triangular laser ranging principle The main principle is triangulation principle as shown in figure 2 Laser projector Imager ja X dIe Lens filter Fig 2 Principle of laser triangulation The distance between the object and the laser can be obtained by the following formula v fxu x 1 The distance between the laser projector and the reflecting point can be expressed as the following formula l v sin q fu xxsin q 2 C cxP1 x 3 c is the length of the unit pixel f is the focal length x is the length of the projection in the photosensitive unit equals x minus the calculated value cxP1 of the differential P1 is one of the pixel coordinates Then the formula 4 can be acquired by the transposition differential of the formula 1 4 We finished using the reflection of laser spot pixel coordinates to calculate the distance between the object and sensor and the distance of the laser spot center is acquired by the way of ex
51. single frequency single frequency amplitude scaled appropriately after FPGA I O pin output If the multi frequency signals will be scaled appropriately combining process and the output the same synchronous design the system clock frequency of the input reference clock in the above ROM information is not lost when the outputs of all the processed information ROM reference clock frequency is calculated as 2 3 as shown When the operating frequency is set to the lowest frequency 10Hz the frequency points up then ROM reference clock frequency up to 3 7MHz the design 100M x K 2 10 2 100M K f 3 minimum operating frequency of the highest frequency of the reference clock ROM 3 6 Filter Circuit Design DA with the holding output hold function the final output is stepped waveform to output a smooth analog waveform to the waveform of the output of the DA necessary filtering Design choices Linear Techn ology produces integrated 10 order low pass filter LTC 1569 6 using an external resistor or external clock control cutoff frequency When using an external clock control the cutoff frequency 1s set to f clock 64 clock lt 5M Multi frequency signal acquisition system block diagram shown in Figure 5 OUTPUT clkfliter ipg rod dout 27 0 dout 31 28 address 28 0 address 28 19 address 28 0 H address 9 0 gt clock clk data_a 27 0 counter 27 0 dout_a 27 0 dat
52. steering gear don t work at the same time meanwhile the linear laser projector works The principle of phan yaa Fig 5 circuit schematics Initializatio n Pwm_h 60 Y N timer mode 1 Y Diminishing Y Pwm h Pwm h 40 v A Delay PWM h increments z N Delay Y Fig 6 main program flowchart of MCU controlling servo ee stepper motor fixed rotation angle is the predetermined angle step angle number of steps step angle is 1 8 degrees If the angle is 36 degrees the number of steps is 20 The program flow chart of single chip microcomputer controlling stepping motor is displayed in figure 7 the laser ranging flowchart is displayed in figure 8 a Ga Eeh i F Hardware design Initialization The definition of the status of each beat N Y Jump out n Delay governor N Fig 7 MCU control stepper motor program flow chart 45 The English Proceedings of the College of Instrumentation amp Electrical Engineering Jilin University in the Second Half of 2013 Matlab Call camera extract image y The read image into a binary image y Through regionprops function Note the matrix function annotation area of each measured and calculated
53. the degree of adjusting precision Room temperature 1s 25 degrees atmospheric pressure is normal rising time 1s 3 s constant value We can test the system by setting height information random and analyses of system error Error distribution curve is shown in figure 6 27 The English Proceedings of the College of Instrumentation amp Electrical Engineering Jilin University in the Second Half of 2013 tA 2 fa cm Se ibe cm Fig 6 Error distribution curve 3 2 Analysis of the results The error analysis of the above test results is as follows 1 the actual higher level and set the height of the error This error is relative to temperature error pump gas velocity and Angle error of the motor Error is caused by the temperature error of A T height _ ATx 12x 298 8 The velocity error to the height of the error caused by Av xdAv 12 x1000 9 Error is caused by motor Angle error of AG _48 12 10 The actual error is as follows PEA AN E xA6 3576 12000 12 11 The actual error of system is 0 2cmM the relative error is 1 67 The height error is as follows Height is relative to temperature error and time error The ranging error caused by the temperature error of AT 28 Ah 3315 0 607x AT xt 2 12 Timing error range error caused by At Ah 340 x At 2 13 Total error is Ah 0 905 x AT 170 x At 14 System shows error is 0 16cm the relative error
54. the MCU AT89CS51 as controller the accuracy and response speed of the system the main have been greatly improved To effectively solve the non synchronization high power consumption the actual shallow seismic exploration in the presence of large volume complex wiring problems The design of shallow seismic exploration of wireless synchronization system meet the requirements of exploration and application Reference 1 Yang Chun cheng The method study of seismic exploration in physical prospecting J Science and technology BBS 2012 15 197 218 2 USA R E Sharif Canada L P Jill dutt et al Exploration seismology M Petroleum industry press 1999 2 1 35 3 Luo Fu long The review of seismic prospecting instruments technology development J Journal of petroleum equipment 2005 19 2 1 5 23 The English Proceedings of the College of Instrumentation amp Electrical Engineering Jilin University in the Second Half of 2013 4 Ren Jia fu Li Huai liang Tao Yong l Study of wireless synchronization seismic data acquisition technology J China measurement technology 2008 34 15 1 3 5 Li Tai quan Sun Xian song Low power design of shallow seismograph based on wireless network J Journal of electronic measurement technology 2012 35 12 28 34 6 Li Huai liang Du Xian guo Du Yong et al Study of telemetric seismic data acquisition technique base onwireless communicat
55. the design of hardware circuit and test the simulation for damping device by ANSOFT and summary for the whole achievement of the project In the design of hardware circuit the most important thing is to produce damping effects in closing coil after the demand of low consumption The paper provides three schemes Scheme I and Scheme II are based on the electromagnetic induction and induced electromotive force the damping force comes from the power of the amplified electromotive force The difference between Scheme I and Scheme II is that Scheme I uses a trigger switch to produce the effect Scheme II is after the adjustment of the cantilever using two coils One is an induction coil the other is a damping coil Scheme III uses the mature vibroswitch to control the damping coil It makes the coil cut off when it does not shake in order to save power In order to get the best damping ratio 0 707 ANSOFT becomes the simulating software The number of a coil turns can be known from the result of the simulation so does the current Key words electromagnetism damping low consumption control circuit ANSOFT simulation 1 FOREWORD IT is because the fiber detector has high sensitivity and wild dynamic range and it can get rid of the influence of electromagnetism it is widely used in designs of shaking detectors With the demand of accuracy and sensitivity are higher and higher the usage and improvement of fiber detector is valued So it is nec
56. to the control mode designed the goal which passengers choose bus based on the message is attained As the same time dispatching center realizes the effective dispatching depending on the message Bibliography 1 Xu sun Electronic oscilloscope development in the challenge J Foreign Electronic Measurement Technology 2009 03 2 Lin zhang 12 BitData Acquisition System MAX197 and Its Application in the Harm on ic Analyzer LJ electronics engineer 2002 5 3 Bing yin Huiging wang Zhi yang Lattice LCD display module MGLS 12864TInterface and programming J Journal of henan university 2000 5 4 MAXIM Company product information collection M 2002 5 Zhitian wang Radio electronics measurement M volume one Beying Atomic Energy Press 2002 243 312 6 Tek company TDS3000 A series of digital Fluorescent oscilloscope user manual K 2004 7 Yinghang zhou The principle and types of probes The English Proceedings of the College of Instrumentation amp Electrical Engineering Jilin University in the Second Half of 2013 K 2006 8 Fisherpan Show you know oscilloprobe K 2010 9 Zhongyi zhao Principle of oscilloscope Maintenance and calibration M Beiying Electronic Industry Press 1990 89 106 10 Dongzhuo liu Electronic measurement skills training K 2005 11 Shifu fan Scientific instruments live online application development trend Modern Scientific Instruments K 2009 12 Tianxudu Boli
57. which waste system resources greatly and make the existing source cost higher According to the above problem this article is based on large scale A fig mis Adb A d gt gt tims Mz a Ideal source pulse signal programmable logic device FPGA using VHDL language to design a new type of signal source device which can guarantee the source precision requirements and lower cost and has the function of self test of amplitude frequency and correction VHDL is a kind of programming language with the development of the programmable logic devices using top down design method which can make the design personnel design from the whole to the part in accordance with requirements of the system as a whole 5 1 VIBROSEIS SIGNAL CHARACTERISTICS AND THE PRINCIPLE OF DDS Currently the main source for seismic exploration are explosive source sparker source gas source and vibroseis 6 9 Explosive source gas source and so on belong to the impact source and the source signals are pulse signal with short duration and high concentration of amplitude energy ie ins WHI b Practical vibroseis pulse signal Figure 1 the source pulse function Compared with the impact source vibroseis signals are 30 continuous scanning vibration signal and have the Shi Zhaomin etc The design of lowcost Vibroseis based on FPGA characteristics of long duration amplitude equalization of which frequency components can be adjus
58. wv u w Reclosing relay fo MSP430F149 5 o Single chip Alarm module acquisition microcomputer module Voltage information display module Serial port communication The remote computer terminals PC Figure 1 Single chip system architecture diagrams 98 1 2 The remote computer terminal PC The back of serial communication is the remote computer terminal PC and it Includes data processing background data processing and data acquisition data display and design of control interface Specific means We use c to program in Microsoft Visual Studio 2005 software to design main interface for computer human observation and control Host computer accepts the real time data which MCU sends through serial line and the data is showed on the main interface Graphical interface can also send commands to the microcontroller SCM responds to requests and make corresponding action according to the command The relational structure of the remote computer terminal PC and single chip microcomputer system is shown in Figure 2 Single chip microcomputer system Serial port The data communication processing The main page The remote computer terminals PC Figure 2 The relational structure of the remote
59. 000000 if assumption lt input searching bit assumption bit 1 The 3rd result 11000000 if assumption gt input searching bit assumption bit 0 The 4th result 11010000 if assumption lt input searching bit assumption bit 1 The 5th result 11010000 if assumption gt input searching bit assumption bit 0 The 6th result 11010100 if assumption lt input searching bit assumption bit 1 The 7th result 11010110 if assumption lt input searching bit assumption bit 1 The 8th result 11010110 if assumption gt input searching bit assumption bit 0 Use the way as dichotomy 8 bit A D transformer needs 8 times of searching 12 bit needs 12 times of searching then will finish the task of transformation The inputs stands for the analog voltage in FigureS5 The functions of some feet D0 D7 numbers output the result is expressed in binary numbers CLK offer the pulse signal fCK 1 1 1 lt xRxC CS Chip selection 113 The English Proceedings of the College of Instrumentation amp Electrical Engineering Jilin University in the Second Half of 2013 WR Write RD Read INTR Interrupt Other feet are showed in Figure8 and Figure9 3 3 Programming and proteus simulation Figure10 AD display and proteus simulation Program include lt reg52 h gt include lt delay h gt include lt intrings h gt include lt stdio h gt include lt adc0804 h gt define uchar unsigned char define uint unsigned
60. 10 3 10 Zhang Xiankui Ma Hanzha mobile phone products environmental electromagnetic radiation evaluation R 2008 12 5 CONCLUSION 11 Sun Yanyan the radiation detection busy J 2010 9 electromagnetic The electromagnetic radiation measuring instrument can test the amount of electromagnetic radiation that radiated from the tested place at any time and several places The LCD included in the upper machine integrats and displays those The detected changes of the electromagnetic radiation can be tested at any time security and stability 108 Jiang Ransong etc The manufacture and simulation for electromagnetical damping of fiber detector The manufacture and simulation for electromagnetical damping of fiber detector Jiang Ransong Zhou Rui Xue Bixi Abstract With the development of the fiber shaking detector the demand for the sensitivity and accuracy of data collection is higher and higher so it is a improvable direction to add a damping device to the fiber detector When a fiber detector receives a maximum amplitude signal it helps reduce the amplitude in order to get prepared for the next signal It is necessary to design a device that can hinder the shake It is because the structure of the cantilever is simple that it s widely used in fiber detector this paper will state a damping device based on the structure of a cantilever The paper is divided into three parts the background of the electromagnetic damping
61. 182 Application Note OL http www st com internet com TECHNICALRES OUCES TECHNICALLITERATURE DATASHE ET Doc ID 17353 24 ST Corporation AN3182 Application Note OL http www st com internet com TECHNICALRES OUCES TECHNICALLITERATURE DATASHE ET Doc ID 17353 7 Chen Weitao Zhang Yun Electronic LSM303DLHC OL compass design based on http www paper edu cn releasepaper content 20 1 301 948 1 8 Sun Zuolei Mao Xuchu Zhang Xiangfen Tian Weifeng Pedestrian dead reckoning based on motion recognition and stride estimation J The Journal of Shanghai Jiaotong University 2008 12 2004 Xueyan hu etc Transit Passenger Flow Statistics System design Transit Passenger Flow Statistics System design Xueyan hu Lubai Xingzhi han Abstract Recently the urban traffic jams in serious condition bus as one of the most common means of transport is overcrowded in the rush hour on the other hand it s nearly empty in times of traffic low Moreover faced with the situation of buses dispatching at regular time some people choose to buy their own cars what made traffic in a worse condition Considering resolving this problem we designed a transit passenger flow statistics system which would make a reasonable provision of public transport resources and then contribute to alleviating the pressure on traffic Transit passenger flow statistics system consist of transmitting part and receiving part Transmitting part using Infrared Emitting Diode and Photo
62. 29 zceR bE PWM2 j 10K dk C9 e 1K L C10 R30 RCVEV R31 TT ROVER ones OUTE aik pli R32 ias 3 3UF 300 C13 Miio 74 233 m 0 01UF Fig 3 DC DC inverter Start Initializatio Needs to be Charge The system enters monitoring standby mode End Fig 4 System program flow chart 2 2 Charging subroutine design Charging process is divided into two phases the first stage is the constant voltage charging the charging voltage can be set when the charging voltage reaches 4 2V is transferred to the second stage that is 4 2V constant voltage charging constant voltage charging current will increase gradually decreased over time until the charge current drops to 10mA it indicates that the battery has been charged to the rated capacity of 90 to 95 At this point it can be considered basic full if we continue to charge it the charge current will gradually be reduced to zero the battery is fully charged Specific charging process charge red light is lit when the battery is fully charged the fully charged indicator is lit green As the mobile phone s battery and charging distance are different electricity charged into the mobile phone battery is different The capacity of the lithium battery of Small wasps and HTCONEX are 1420mAh and 2000mAh used in the experiment For example the third row of Table I Lithium Output voltage 3 7v transmitter terminal voltage and current of 12V and Ding Xiaoxu etc Microcontroller based mobi
63. 4 Optical coupling isolation circuit 3 EPIGYNOUS MACHINE DESIGN When the labview is installed on the computer the VISA driver and VISA package must be also installed After these steps We can realize the string mouth communication The VISA function is located in the function panel Instrument I O Sub template The VISA serial configuration function to bring the VISA resource name specified serial according to specific initialization settings Through the connection data to the VISA resource name input can be determined to be polymorphic instantiations VISA write a function of writing device and interface VISA resource name specified the write buffer data The specified number of bytes read VISA read function from the VISA resource name specified in the serial And return the data to read buffer VISA shutdown function closes the specified serial session handle or event object The project design of stepper motor control procedures using the communication function of these binding events structure were prepared Through the program debugging The stepper motor s steering and speed can be controlled Figure 6 back panel interface 59 The English Proceedings of the College of Instrumentation amp Electrical Engineering Jilin University in the Second Half of 2013 4 THE SOFTWARE PART 4 1 stepper motor acceleration and deceleration design Singlechip stepper motor acceleration and deceleration control 1s actua
64. 49 MCU to collect voltage data and control reclosing device and use a relay to simulate reclosing tripping MCU communicates to PC through serial line device feed operation with 1 THE OVERALL DESIGN The serial communication devices can be divided into two parts single chip computer system and a remote computer terminal Serial communication module makes single chip computer and PC data transfer through the serial data cable 1 1 Single chip computer system Front side of the serial communication is single chip microcomputer system e g Figure 1 This part includes a power module the voltage signal acquisition module single chip processing module automatic reclosing relay the voltage information display module alarm module Systems converts mains from 220V AC to 0V 5V AC through the transformer then it can get digital signal which are available for single chip through precision rectifier and MSP430F149 ADC12 MCU processing module processes the data through filter units effective algorithms and controls working state and secondary of the automatic reclosing device relay reactions When overvoltage alarm circuits generate alarm signals Throughout the process SCM brings real time data to display on the LCD and the data is transmitted to a remote computer terminal through a communications device Power supply of each module is provided by the power supply module Power supply module
65. 85 186 FU yu jing etc Fuzzy control based on ultrasonic ranging parking system model design Fuzzy control based on ultrasonic ranging parking system model design QIAN Cheng hu1 FU yu jing MIAO Hong song K ANG ning College of insrumentation andElectrical Engineering Jilin University Changchun1 30022 China Abstract In order to provide a better theoretical foundation for developing the automatic parking system it designed an automatic parking system model based on the ultrasonic that is used in distance measurement First modeling analysis is carried out on how the car moves combined with actual situation the three vertical parallel oblique fuzzy controllers for the parking system are put forward and Simulation respectively in Matlab Simulink Then using ultrasonic ranging technology video capture technology to get around environmental data In accordance with the ratio of the actual vehicle model car is designed instead of the real vehicle at the same time the C code which is converted by the fuzzy controller that is verified is embedded into the main control board of Freescale K60 for automatic parking feasible tests Test results show that the set of system can efficiently achieve three parking spaces autonomous parking with short parking time high control accuracy good system stability Key words Automatic parking system Fuzzy control ultrasonic FOREWORD IN recent years with the development of
66. 90 0 10 Table 2 Error analysis table PrE EE average standard M eee average standard ee average standard error error error error error error 1 00 0 12 0 14 4 00 0 13 1 30 7 00 0 10 0 32 10 00 0 19 0 35 13 00 0 18 0 15 16 00 0 04 0 26 4 2 2 The measurement results According to Table 2 the average of average error 124 0 01mm the average of standard error 0 42mm The measurement can be approximated with an Wang Duogiang etc Intelligent House Leakage Detection and Alarm System average error of 0 01mm standard error of 0 42mm Gaussian theory of accidental error shows that 68 3 of the measurement error is between 0 42mm 4 2 3 The system false alarm rate experiments 1 Detection Method Under laboratory conditions simulate no water water seepage smooth flow the leakage medium flow rate of water flow water pipes burst turbulent flow four cases Detect the alarm system whether Different alarm system live to work 72 hours to observe the works normally under these four cases stability 11 The test results No leaking don t send alarm SMS System false alarm rate equals 0 ii Leaking water seepage leakage and water pipes burst in the three different situations can send alarm SMS properly 5 CONCLUSION This study designs a kind of discontiguous reflected liquidometer system The system is applied to design the alarm for house leaking The innovative use of the linear array of photosensi
67. A platform and the principle of DDS the control part adopts double machine communication between MSP430 MCU and FPGA The lowcost signal source designed in VHDL language and IP core is applied to the electromagnetic Vibroseis It not only can test the amplitude and frequency but also it has the correction function Using MATLAB software and the method of digital analysis the result shows that the accuracy of signal source output signal completely satisfies the requirements of the source system Keywords vibroseis FPGA DDS signal source 0 INTRODUCTION As the seismic exploration 1s becoming more and more valued by people the seismic source as an important part of seismic exploration technology directly influences the effect of the international seismic exploration areas compared with seismic exploration 1 In today s other source vibroseis with its advantages of easy control and small destruction has become the main excitation source 2 Current vibroseis signals are mainly based on DDS chip of high precision but the practice proves that the source itself is open loop structure which can easily cause nonlinear distortion and the nonlinear coupling between the source base board and ground 3 4 lead to the distortion error between the output signal of signal source and the actual vibration signals making high precision signal generated by original signal source not be converted into equivalent precision of vibration signals
68. AT89C51 and the temperature and humidity sensor DHT11 to constitute a multiple point real time monitoring system of temperature and humidity finally completes the function configuration display and alarm in the PC machine The system is easy to use very easy to expand can be widely used in various industrial production and aquaculture Key words Wireless data transmission nRF24L01 DHT11 A multi data acquisition PC real time monitoring 0 INTRODUCTION In today s industrial and agricultural production required temperature and humidity acquisition of more and more occasions accurately and easily measure the temperature becomes critical Traditional wired temperature measurement method sexist complex wiring easy to aging lines line fault is difficult to trouble shoot equipment relocation and other issues to bere wiring Especially in the wired net work is not open or because of site restrictions and inconvenience of environmental factors in the case set up lines to temperature and humidity data acquisition brought a lot of trouble To monitor the real time temperature and humidity data you must use wireless transmission for data wireless data collected tobe processed through the host collection transmission reception and computer to control and monitor the operation of equipment and reduce unnecessary line equipment expenses 1 SYSTEM COMPONENTS This design of multi node wireless temperature and humidity monitoring s
69. Analysis of System In regular hexahedron adjacent surfaces are vertical and opposite surfaces keep parallel According to synthetic criterion when the system are balanced the resultant support produced by the surfaces turns out F F F HEF FY HE F y 1 When force on one surface shown in figure2 a kK F F ko Fo 0 2 Conclude by 1 2 Pah 3 When force on two surface shown in figure2 a F F F F 0 o Conclude by 1 4 lee Bad 5 When force on three surface shown in figure2 a F F F 0 A Conclude by 1 6 Because this system is composed of symmetrical objects such as sphere cube the above algorithm meet the symmetry and rotary substitution sex namely regular hexahedron any one two or three adjacent surfaces stress distribution are all meet the above formula Analys the system when it 1s balanced and according to the Newton s third law Action and reaction between two objects are in the same line equal and in the opposite direction 8 While balance force are two forces acting on the same object and of the same value direction and also in a straight line Therefore pressure on each surface of regular hexahedron pressured by nonmagnetic iron ball and its corresponding support is a pair of action and reaction and they are of the same value and reverse And resultant support from regular hexahedron to nonmagnetic iron ball nonmagnetic iron ball s gravity are a pa
70. B development environment The scene of the remote monitoring platform can display real time information of images sounds and the human body signals obstacle alarm prompt etc at the same time you can ask the robot body give orders make its relevant action Independent development of PC shown in interface as figure 5 PE TESS mr at zeA PRO ibers te Fig 5 PC software interface HU Rui fan etc Apost disaster Detection Rescue Robot System Design 5 TEST AND ANALYSIS Image real time transmission and remote control and adopted different wireless devices in this way can avoid the mutual interference increasing the actual control distance In the lab building image real time transmission and remote control of robots from repeated tests Test result is shown in figure 6 X said no obstacle image transmission distance when X said when there is a wall image transmission distance Y no obstacle when control of the car distance Y gt said when there is a wall to control the car distance 25 m 1 2 3 4 2 6 T 8 9 10 AR Fig 6 Test line chart Can be seen from the test results through the PC to the car s actual remote control distance is more than 15 meters robot can complete the task realize the rescue personnel Tested again at the same time the car braking distance stop operation after the car walking distance and the distance of obstacle avoidance car Test results are show
71. B transceiver oscillator and with full modem control signals UART just add a few capacitors can achieve USB signals and RS232 signal conversion can be easily embedded into handheld devices The device as bidirectional USB RS232 converter one USB data received from the host and RS232 peripherals hand to receive data from RS232 converts send message stream format peripherals into USB data format sent back to the host All these tasks done automatically by the device developers need to consider firmware design By using the USB block transfer mode the use of large data buffers and automatic flow control PL2303HX able to achieve higher throughput than traditional UART Universal Asynchronous starting device ports up to 115200 bps baud rate can be used for higher performance be used System serial communication module connection diagram in Figure 6 below EDA ODP Figure 5 Serial Port Module Design 3 SOFTWARE DESIGN 3 llower computer software The system uses the C programming language shall be determined according to the design requirements of the task the complete structure of the system program as modular programming method the task is divided into modules each module features a clear chronological relatively independent functional and relationships system software design can be divided into several parts the first is the underlying driver of each module to write and then the system on line debugging and fi
72. C0804 to transform 3 1 STC89C52 STC89C52 is a product of STC It has 8K STC89C52 use MCS 51 as its core and has many improvements that 51 singlechip does not have It has 8bit CPU and programmable flash storage It has these functions 8k bit flash storage 512bit RAM 32 bit I O timer inside 44B EEPROM MAX810circuit three 16 bit timer counter 4 outside interrupt a 7 sides 4 programmable flash storage class interrupt structure T2 P1 0C 40 T2 EX F 1 36 P1 2 38 P1 3 37 P14 36 MOSI P1 5 35 MISO P1 6 a SCK P1 7 33 RsTO S 32 RxD P3 0 O 10 31 TAD P3 1 11 30 INT P3 2 O 12 2o MTT P3 3 Q 13 28 TO P3 4 14 2T T1 P3 5 O 15 26 wR P3 6 O 16 25 RD P3 7 O 17 24 xTAL C 16 23 XTALI LJ 198 r GND QO 20 STC89C52 Figure8 Vor W Vam CLER DBo LSB DE Ba HE Di Figure9 ADC0804 Chip parameter working voltage 5V VCC t5V Analog input voltage range 0 5V 0 lt Vin lt 5V Resolution ratio 8 bit 1 2 1 256 Transform error 1LSB reference voltage 2 5V Vref 2 5V 3 2 ADC0804 transformation ADC0804 is a successive approximation method A D transformer this kind of A D transformer has not only its speed is fast but also revolution ratio is high and its price is cheap It 1s widely used in design of microcomputer ports Take a 8 bit ADC0804 as an example The Ist result 10000000 if assumption lt input searching bit assumption bit 1 The 2nd result 11
73. C89C52 connection shown in Figure 5 Gl 400n U1 TEXT gt t CO FID FAL co fro STC89C52 TEXT Figure 5 STC89C52 connection The microcontroller program has the data processing unit and 0 01ms is the sampling frequency the data Be integrated of analog digital conversion will be converted to magnetic field strength and compare to the limit value If the measured value exceeds the national standard electromagnetic radiation limits the microcontroller via the warning light indicating that the current measured value exceeds the radiation of electromagnetic radiation standards specified value to show to make some precautions to avoid contamination of electromagnetic radiation on the human body effects 4 SOFTWARE DESIGN In the process of writing the system software using modular design thought making the process a quick and efficacious System program mainly for data acquisition data processing data display and extra functions including the main program data acquisition subprogram analog digital conversion subprogram data disposing subprogram LCD display subprogram alarm subprogram etc System main program is an important process of the measuring instrument which is responsible for scheduling system of various application modules and exchange the information with the system equipment in time achieving the overall management of the software and hardware resources System of the main program flow i
74. College of Instrumentation amp Electrical Engineering Jilin University Academic Practice Six in One Training Project English Proceedings 2013 Second Half CONTENTS Microcontroller based mobile wireless charger design cccsssseeseeesessseeeees Ding Xiaoxu Guo Baifu Like 1 Pedestrian D ad Reckoning Device Desion Based on S 1 M32 ic ci 2 expials wicehen ae a a a a Geared ecdehe Gees A PEINE EEA ety eh EEA A PEAT EEA S PEE EA A dese en a ee Luo Yin Lu Hongzhou Zhao Yu Wang Jun 6 Transit Passenger Flow Statistics System deSiQn cccccceesssssssssssesssssssesseaes Xueyan hu Lu bai Xingzhi han 11 Design and Implementation of the full range of sub control intelligent lighting system cc cccccccccccceeeeeeeeeeeeees Seago oes goes eves ess see Li Na Zhang Tao Ye Jiansong 15 Research on wireless synchronization device in superficial seismic exploration cccccccccccccceeeceeeeeeeeeeeeeeseeeeeeeees E AE EE A E E Zhang Lin hang Pei Li ran Sun Zi chao Wang Cong 19 The Research of Sphere Lifting Height Automatic Control System Based on Air Pressure Control ceeeeee ERE Rr mR AE ROIR ORR PN Toyo ORDA ORS PITY NORTE AORN pan AE AEE T Qian Chenghu1 Shi Zhaomin Kang Lili Li Qi 25 The design of lowcost Vibroseis based on FPGA 0000 c0e Qian Chenghuil Shi Zhaomin Li qi Xu qian 30 Design of Gravitational Acceleration Measuring Device Based on Balance Method c
75. D Beijing University of Technology 2012 2 Jiang Zhi wen Zeng Shi J highway and motor FU yu jing etc Fuzzy control based on ultrasonic ranging parking system model design vehicle automatic parking system based on binocular vision and path planning 2008 315 19 3 Song Jinze Research on Key Technologies of the automatic parking system D Changsha National University of Defense Technology 2009 4 He Jian guo Zhang Wen sheng Zhao Gen zhuang Research and implementation of method J Geospatial information 2007 5 2 3 5 intelligent parking guidance 5 Fu Jufang Zhang Xiaolong East bin Automatic parking system J introduction and analysis of foreign cars China Science and technology information 2009 2 259 26 6 He Feng A method for parking space detection in automatic parking system J Sensor world 2009 3 1 24 27 7 Yang Xiyang especially clear X1 Li Hongxing Automatic reversing controlvariable universe theory J Journal of Beijing Normal University Natural Science Edition based on 2005 41 4 348 350 8 Sun Boxun Ultrasonic ranging automatic parking assist system based on D Changchun University of Science and Technology 2011 9 Jiang Hui Hui Guo automatic parallel parking system Steering Control Strategy D Jilin Jilin University 2010 10 Wu Bing automatic parking path simulation and motion control study J Hefei University of 2012 11 Jiang Hui Hui Gu
76. E IAT FE EP 22 t2TE 2 Fe Figure 6 Launch Flow Figure Figure 7 Reception Flow Figure 4 EXPERIMENT RESULT ANALYSIS When the temperature is over or below the temperature of the set value such as 40 C and 20 C or humidity is higher than the set value such as 80 or the lightening strength is higher than the set value such as 8000Lux buzzer will give out sounds for alarm The general experimental effect is very good which reaches the expected design goal 5 CONCLUSION The above mentioned NRF905 based wireless greenhouse environment monitoring system can implement wireless temperature humidity lightening strength measurement and data transmission making the data of humidity temperature lightening strength transmit safely and reliably remote control and alarm which guarantee the complex temperature and humidity and the lightening environment the greenhouse and grain warehouse need and obtain good effects References 1 Zhao Jianhua Han Yujie nRF905 based Greenhouse Wireless Data Transmission System J Electromechanical Product Development and Innovation 2009 22 6 141 142 2 Xie Weicheng Yang Jiaguo MCU Principle and Application and C51 Program Design M Beijing Tsinghua University Press 2007 3 Chang Jun Li Yan Applications of Humidity Sensor HS1101 in the Smart Household Control System Machinery and Electronic 2008 23 5 2 3 4 Texas Advanced
77. M capacity of a single 2 bit general FPGA chip is difficult to meet the requirements Adopt a truncated thought with 10 of the ROM to achieve the above requirements the address of the ROM 10 and the phase accumulator 10 is connected to the address which can greatly save ROM space Experiments show that there will be error present in the actual output waveform truncation but has little effect on spectral purity coupled with the subsequent low pass filter to further reduce the impact According to a periodic sinusoidal signal using the direction control signal accumulation method can further compress the ROM 3 SYSTEM MODULE IMPLEMENTATIONS Multi frequency signal generation system consists of communication frequency settings accumulator waveform memory ROM combined frequency output filter and other components 3 1 Communication design Due to the limited microcontroller pin resources taking into account that the amount of data the system needs little effect on the speed of data transmission requirements are not high so communication design uses a custom serial communication format Commun ication schematic diagram is shown in Figure4 a fig a Mi Ua eer eee J L L Clock EEE E i High 28bit F 4bit F Control word Control word Figure 4 Schematic communication MCU and FPGA system are interconnect through a clock line and a data line each communication transmitting 32bit data in which the low frequency control word 28
78. NCLUSION Through unremitting efforts and finally completed the wireless multi point temperature and humidity detection system of the preliminary work namely the overall hardware connection As well as temperature and humidity control part PC interface debugging have been completed According to our design of the control approach can achieve the collection and transmission of temperature and humidity as well as displayed on the PC screen you can display the current temperature and humidity changes the buttons sensors and other input signals into the microcontroller and then based on the information obtained upward position machine signals the control PC interface real time display of temperature and humidity reached a temperature and humidity testing purposes At the same time when the air humidity below 20 or above 80 of the time the buzzer will alarm automatically On the basis of these Free to the control system through the key switch References 1 Zhao Zhongbiao NRF40lin the greenhouse control system application research J Industrial control computer 200821 3 control 2 Xigqiang Greenhouse monitoring system D Beying China Agricultural University 84 3 4 5 6 7 8 2005 Li Shanjun Zhang Yanlin Ai Ping Zhai Hong Greenhouse Environment Control Technology Application and Development Trend J Agricultural Engineering Technology Greenhouse Horticulture 200802 HeQiao Micro co
79. NS WITH the of modern electronic technology people s work and life requires frequent development use of a variety of electronic devices The operation of electronic equipment will inevitably produce different levels of electromagnetic radiation electric and magnetic fields generated by the interaction of electromagnetic waves change electromagnetic waves emitted into the air or disclosure of the phenomenon called electromagnetic radiation thus most of the time people are exposed to electromagnetic radiation Electromagnetic radiation can be described as invisible killer studies show that electromagnetic radiation on human health has a great impact although it is keen to reduce the harm of electromagnetic radiation but the face of the damage can t be captured with the naked eye what should do Presently existing electromagnetic radiation detection apparatus has been able to be detected value of the point measurement of electromagnetic radiation but sometimes it is necessary to point electromagnetic radiation for Long term detection or both a plurality of detection points are detected for example by detecting electrical equipment electromagnetic radiation value to determine whether the device is running check the line if there is leakage risks This requires testing equipment can work stable without human control for a long time and a plurality of detectors can be integrated with data locations to be monitored Howe
80. NieY ang LiTengFe1 LiuHui jilin university instrument science and engineering institute changchun 130061 Abstract In the process of sample measurement due to environmental factors in many cases researchers are unable to directly measure the sample This requires the application of measurement and control equipment to accomplish remote control With the development of modern science and technology we can easily achieve this goal we can design one kind of monolithic machine based step by step electric motor runs navar Through the epigynous machine we can realize the sample location We use MCU as the controller And we design the interface of the epigynous machine based on the labview software It can send commands to the microcontroller finally we can realize the location of X Y Z three directions Key words epigynous machine stepper motor three dimensional system PREFACE THROUGH the epigynous machine the stepper motor can be controlled very accurately When the high temperature or high radiation comes It s not suitable for the operator to operate the instruments by their own hand then the MCU can be choosed as the controller we can design the epigynous machine based on labview which is a very used software Then through the RS232 it realizes short range control of hypogynous machine and long distance control of epigynous machine Finally the operator can easily control the stepper motor s working state 1 W
81. ORKING PRINCIPLE OF THE SYSTEM Stepper motor Hew as COMPUTER cC gt The data transfer The x direction 1 L298 L riv r module E P Controller STESSC52 ie L298 Driver module l L298 Driver module Figure 1 overall system structure diagram Stepper motor Stepper motor The direction i The y As what shown in the above The computer Through the RS 232 serial communication Send instruction to 52 microcontroller then through the L298 drive module driver stepper motor to control the three direction of positive amp negative and mobile implement system of distance namely three dimensional positioning function 58 location 2 THE SYSTEM HARDWARE DESIGN 2 1 Communication part Because the system is mainly controlled by PC the hypogynous machine and epigynous machine must carry on the communication Now we can choose to use the RS 232 protocol to communicate RS 232 signal from the computer is a positive voltage based on 3 7V 3 7 V negative voltage pulse chain The voltage signal needs to be converted into 0 5 V pulse chains so that the processor reads Conversion circuit apply MAX232 chip MAX232 chip contains a power supply voltage converter to 5 V voltage transform into RS 232 10 10V output level need voltage Therefore need only a 5 v power supply to the system power supply 5V Figure 2 Peripheral circuit of MAX232 TIIN pin conn
82. PGz the weight of following can be expressed as formula 3 A A x P G x P P P A A x P G x P P P2 A A x Pi G x P P P 3 By reducing the weight of the acceleration values and improving the weight of three axis data of gyroscope can achieve satisfied filtering effect Put the processed acceleration values into formula 3 we can obtain the de noised pitch and tilt angle Let us combine with three axis magnetic field components Mx My Mz compass suppose the component of the magnetic field measured by the electronic projected onto the xy plane after tilt compensation 7 as Hx Hy the heading angle A of pedestrian can be expressed by formula 4 H M sin M_sin H M sin 0 sin 0 M cos 0 M sin 0 cos 0 H A arctan H y 4 The Mx My Mz is the three axis magnetic field component after ellipsoid correction 8 3 3 Count of the number of step and stride estimate Since the three dimensional sensor module 1s placed on the waist of pedestrian the accelerometer can detect vertical acceleration changes in walking cycles of pedestrian the vertical acceleration threshold determination method is used to count the number of step Meanwhile the stride frequency Hz and stride length m of pedestrian has linear relationship and can be used the following model 9 to estimate 0 4375 O lt F lt 1 35 S 0 45F 0 17 1 35 lt F lt 2 45 0 9325 2 45 lt F lt oo 5
83. Sensor 2012 06 86 87 Li Jiaoyang etc The Design and Implementation about attendance system used in campus classroom based on RFID technology 9 Liu Zhiping Zhao Guoliang Short range wireless data transmission based on nRF24L01 J Applied Science and Technology 2008 35 3 55 58 10 Qian Chenghui Han Xiaohui Wang Ying Ling Zhenbao Gao Le Statistics System Design on Flow of People Based on CC1100 Wireless Transmission J Journal of Jilin University Information Science Edition 2012 30 05 497 502 11 Baozhao Wei Wang Lin Xu Qi Li Yunfei A Converter Module Design about USB RS232 Based on FT232R J Computer Knowledge and Technology 2008 7 1204 1206 12 Su Zhuanfang Visual Basic Programming M Higher Education Press 2007 5 13 Guo Tianxiang 51 single chip C language tutorial M Beijing Electronic Industry Press 2009 14 Li Wenfeng Wang Ruchuan Sun Liyuan MiniTE data acquisition routing for wireless sensor networks J China post and telecommunications university journals 2009 16 1 16 21 15 We1 Caigqiao Wang Xiaoguang Jiao Mandun The Output of Complex Data Report Based on VB and EXCEL J Journal of North China Institute of Astronautic Engineer 2005 15 1 3 7 53 The English Proceedings of the College of Instrumentation amp Electrical Engineering Jilin University in the Second Half of 2013 Intelligent Multifunctional lamp Zhang Zhuo Chen jie yuan Zhang Wei College of instrument
84. T driver operating voltage 10 20V Q1 is turned on or off which is controlled by the output of HO and LO control Q5 on and off so as to control the half bridge Ding Xiaoxu etc Microcontroller based mobile wireless charger design R l p a na amp gt 6 2 l 18 4 wtp a vec R i T C14 THR l 4148 l U4 22uF 470uF A ul DISC ee b N v C15 100p iiao or 3 J oom DS 0 1UF C17 IK R40 ae I Thy ESN RA 10K IR2104 C16 C19 IRFB3607 Re R41 46 z 13 Re i0K a 47 i i DIO R38 T p 4 1K IN4148 Fig 2 The hardware circuit 1 3 BUCK chopper circuit DC DC converter is fixed DC voltage into a variable DC voltage also called DC chopper Buck circuit is a step down chopper The output average voltage U0 is less than the input voltage Ui the same polarity In this circuit the input is always greater than the output so we use pulse width modulation BUCK converter BUCK converter also known as buck the supply three terminal switching buck regulator 1 3 1 KA7500B Introduction and working principle converter series switching power Circuit depicted in Figure 3 is essentially a power supply circuit with constant current constant voltage output It
85. The research based on FBG seismic sensor D Lanzhou Lanzhou University 2010 2 Liu Hanping Wang Jiangang Cui Hongliang Chen Bingquan FBG earthquake detector J Shandong University college journal The 37th of 2nd periodical 89 90 3 Zhang Hongrun Fu Jinxin 200 examples of application of sensor M Beijing Beijing university of aeronautics and astronautics press 2006 299 303 4 Kang Huaguang Electronic technology foundation for analog parts M The 5th edition Beijing Higher Education Press 2006 144 147 5 Guo Tianxiang C language for New Concept 51 Singlechip M Beijing Electronic Press 2009 95 110 6 Li Xuehai Fast Practice for Classic 80C51 Singlechip M Beijing Tsinghua University Press 2012 11 7 Xiao Jinghe Selection of 555 556 integrated circuit M Beijing China Electric Power Press 2010 42 44 8 Song Zhiying Temperature alarm circuit of NES555 J Experimental technique and management 33 35 9 Sui Tao A design that can control delay circuit J Coal mine modernization The 69th 41 42 10 Chen Hong Hou Guodong Electromagnetic field analysis and simulation for long straight 119 The English Proceedings of the College of Instrumentation amp Electrical Engineering Jilin University in the Second Half of 2013 solenoid J Light Engineering Institutes of Zhengzhou 11 Liu Guoqiang Zhao Lingzhi Jiang Jiya Ansoft finite element analysis for engineering electr
86. WONIa 3 jeu Bis s588 The Sle cbromazneti 2 signal sensor The wireless receiving 4 module Map430F14 Liquid crystal display module a upper conputer Fiter amelitier circuit MIS P4S30F 149s buih agd The wireless transmisshn module b Lower machine Figure 1 The overall design diagram 2 THE DESIGN OF HARDWARE CIRCUIT 2 1 The Upper Machine Design 2 1 1 Sensor The sensor part adopts antenna for receiving electromagnetic signal as the equipment Electromagnetic radiation in the space can be divided into electric field radiation components and magnetic radiation Induced electric field electric field radiation is made and voltage unit is the V m Magnetic field radiation is due to A current the magnetic induction unit is the A m So the unit of electromagnetic radiation is including W m2 namely the power density Antenna as a sensor device has wide frequency band it can accurate induced electric field magnetic field detection of space power distribution and so on it just meet the design requirements of the instrument 106 2 1 2 The filter and amplifying circuit The signal collected by the antenna sensor need to filter out the high frequency component keeping low frequency components so the filter circuit is designed for active low pass filter circuit Because signals the antenna acquisition are faint so after filtering to enlarge it to meet the requirements of the
87. WORK FOR THE WHOLE SYSTEM The overall design work is mainly achieved by the microcontroller program control which works as follows the circuit startinitialization the circuit function selection output select and determine the output the microcontroller calculates the output PWM data processing adjust the PWM signal duty etc done by signal acquisition regular collection and adjusting the duty cycle voltage 2 1 overall framework of the program shown in Figure 4 The English Proceedings of the College of Instrumentation amp Electrical Engineering Jilin University in the Second Half of 2013 100uH Tl PNP L1 D2 SR260 N2 T gt C2 Ds C3 os 470uF x IN5819 E 470uF L2 1 Sio ook gt 90uH FEILE LED N2 E AP T ie wae me E RI hour JIK c4 R5 ADI LM2940 Tan R15 ba l 100 g Fe BK EK R16 ADO t T T 100k RA ons JARI C5 celeb 1K R21 e 0 1UF RCE YY Kot Gen IRP1 R23 R22 R20 100K LM358 R244 590 590 tao KA7500B R207 5A R28 cs R
88. a linear proportional relationship Reasonably setting the stomatal patch radius ventilation tube bottom radius the speed of the pump pumping gas we can make the ball higher level and motor rotation linear relationship 1 2 1 motor control module design Due to the stepper motor output angle is proportional to the number of input pulses strictly we can control displacement by the input pulse number The stepper motor speed is proportional to the input pulse frequency so we can control speed by the input pulse frequency 5 Stepper motor uses 57BYGH210 4 and it s four phase servo stepper motor The stepping angle of the motor is 1 8 or 0 9 degrees To ensure accurate control we use eight beats to control motors Motor control sequence diagram is shown in figure 3 bt Ml B Dif Fig 3 Timing diagram of motor controling Driving a stepper motor and supplying electricity according to the order of DA A AB B BC C CD D the stepper motor is rotating clockwise We can control the angular displacement and the speed of the stepper motor by controlling the input motor pulse number and pulse frequency Shi Zhaomin etc The Research of Sphere Lifting Height Automatic Control System Based on Air Pressure Control 1 2 2 worktable design
89. a etc Development of early detection instrument for apnea syndrome the sector information before storing the information in the SD card and then can create file write file delete file and so on After accessing the FAT and root zones of the SD card and verifying that the file you want to create does not exist and you have enough blank cluster the file can be created and registered in the root zone at the same time available blank cluster address recorded by the chain rule in the FAT table When writing data we can base on the file name in the file list area to find the destination address and then complete the data written by the chained address of the FAT table 3 2 Data transmission by Bluetooth Bluetooth technology is a wireless communications technology 14 working in open 2 4GHz band The line can be omitted in a portable device by using Bluetooth so we can realize point to point data transmission in real time This design uses XS128 Bluetooth module the module adopts the serial communication mode and is divided into master and slave module the two modules automatically matches connections after power on and master module using USB interface can be directly connected to the PC 3 2 1 The Bluetooth terminal node UART port select l Data format setting l Set baud rate 9600bit s l Enable UART Send Date ES Fig 7 Flow chart of transmission pro
90. a_b 27 0 q 9 0 ufo out 9 0 OUTPUT gt o o dout_b 3 0 data_c 27 0 Ipm_rom1 address_b 28 0 cloc address 28 0 inst8 f9 0 address_a 28 1 adress 28 N address 9 0 q 9 0 t clock inst inst Ipm_rom3 address_b 28 19 H addres 9 0 clock 9 0 Figure 5 FPGA multi frequency signal producing system 134 Kang Pan etc The multi frequency signal generating technology for the shallow surface detection 4 THE EXPERIMENTAL RESULTS In a laboratory environment the experimenters use an oscilloscope at the transmitter power resistor in series with the transmitter current waveform capture Figures 6 to 11 respectively they are output wave fo rm of single frequency dual band and trib and its FFT waveform transformation Bec ause of the near surface multi frequencyelectro magnetic emissio n detection system using a multi turn coil as the inductive load the load impedance at high frequencies will be significantly increased therefore the result re flects thatmultifre quency synthetic signal spectrum 1 n the high frequ ency component amplitude is lower than the low freque ncy component amplitude A U V 4 0 VVVY 0 1000 2000 3000 4000 t ys Figure 6 Single frequency signal time domain waveform 201g Vims db 20 20 0 1000 2000 3000 4000 f Hz Figure 7 Single frequency signal frequenc
91. ace multi frequency signal 0 INTRODUCTION Shallow surface detection by electromagnetic wave penetrating uses different frequency of electromagne tic waves for different depth of strata information and single frequency electromagnetic waves can only ach ieve a single probing depth so it reflects a single stratigraphic information on the practical application of low efficiency A multi frequency electromagnetic detection system is capable of firing multiple frequen cy electromagnetic waves everytime and this can be achieved at different depths of the underground expl oration target body a the same time The core technol ogy of multi frequency electromagnetic induction de tection system is a multi frequency signal generation technology This paper aims at near surface detection system and it designs multi frequency signal system which is based on MSP430F149 microcontroller and programmable digital logic devices FPGA 1 2 4 CEP1C3T144 Moreover it produces good signal waveform high resolution and low harmonic distortion single and multi frequency signals This paper also overcomes the bit stream method coil load stability requirements 12 Pseudo random method can not arbitrarily set the frequency and the THD s total harmonic distortion high shortcomings 11 1 GENERAL DESIGN OF SYSTEM According to the system detection and the need of field work multi frequency signal generating system includes two modules that is the human co
92. agnet Under the magnet is a coil that has enough large diameter It can let the magnet go through naturally The left coil links a 741 in phase voltage amplifier A diode links the output of the amplifier making the 110 current can only go single direction A coil and a soft spring are regarded as a switch The right soft spring connect the LED working as a indicating light The right of the circuit is the power supply consisting of a battery and a amplifier Now let s say something about the working process of the circuit When the shaking signal comes the magnet on the cantilever will shake up and down the position of the coil and the magnet will change So the induced electromotive force rises Then the amplified electricity runs across the LED and the right part of the circuit So the left coil and the coil can be regarded as a power supply and it works for the right coil Then the current goes across the right coil the right coil can be a _ electromagnet Image when it becomes a electromagnet and then it will absorb the metal plate and it can be regarded as a switch the battery will work When the battery works the amplified signal will go across the LED and the left coil then go back to the cathode The current will go across the left coil and it can be regarded as a electromagnet It can work as a damping device to the magnet The scheme seems to be fine But what is the fact After finishing making the model the first
93. al and then repeat accumulate eventually produce 28 to accumulate address and 10 bit output to high sine lookup table ROM as the ROM address which determines the number of bits in the accumulator output signal resolution and the accumulator the accumulation cycle determines the output signal period 10 3 4 Waveform Memory ROM design Waveform memory ROM uses Quartus l software MegaWizard Plug In Manager Custom 10 of the ROM The design uses a 10 bit parallel high speed DA which requires single frequency output data format But it can not be more than 10 Actually it is designed with tri band The final single maximum frequency output amplitude quantized value is set to 340 using the 10 bit data output format fully meet the requirements ROM table loaded Mif file in this design obtained by the MATLAB programming the main program as shown below x 0 1 1023 y round 170 sin 2 pi x 1023 170 a x y fid fopen rom1023 mif w fprintf fid od d n a fclose fid 3 5 Combination frequency output design Combination frequency sine wave frequency outpu t module of the completion point synthesis High iom clock ryu fielo inclkO frequency 20 000 MHz ion Mode Normal Operat de Normal Cik Ratio Ph dg DC c 0 input information through the microcontroller determines the final four points to the output frequency I f the output will be
94. al frequency AC voltage is provided by the Laboratory of Jilin University relay protection Tester Measure the voltage with a multi meter and read the voltage value displayed on the LCD record two sets of data Test data is shown in Chart 1 Han Si yu etc Design and Realization of a Secondary Reclosing Microcomputer Device Remotely and Interactively Controlled by PC Chart 1 Actual voltage and displayed voltage comparison chart Light is put out After the delay time which is set by pc the relay switch on for the first time If the voltage is lower than the threshold voltage then the system is back to normal If the voltage is more than the threshold voltage then repeat the above actions Because of the single chip s high speed the phenomenon people observed with the naked eye is that the light is lit once time c After the second delay the relay switch on for the 8 15904 fl o second time If the voltage is lower than the threshold 9 1605 00 5 voltage then the system is back to normal If the voltage is more than the threshold voltage then the recloser relay switch off As the same time switch on the standby relay in order to let the standby power run 3 3Analysis of PC control One side Pc can display the voltage value sent by single chip On the other side PC can Change voltage WEES SDO es and Modify the delay time When the voltage is lower than the threshold voltage Pc can control the relay by the button switch off an
95. al results through the software program written in Visual Basic language It can eliminate the burden that teachers statistics manually brought System testing arrangements for 183 college students carry the Student IC card out of the classroom which 101 students from bringing himself and other students IC card and continuous brush cards illegal operations in and out of the classroom and the remaining 82 students make a normal credit card operation The test results show that 98 students violate the rules amd 81 students obey the rules the relative error is less than 3 Key words RFID wireless multi point transmission class attendance anti violations module with wireless data transmission module to 0 INTRODUCTION NOWADAYS teachers usually give score to students according to their attendance Artificial checking class attendance is a waste of time and it can t avoid the cheating of checking So it is necessary to design a set of system to checking class attendance This kind of system can do convenient to the teachers to know the class attendance There are two kinds of attendance system that can check class attendance One is the fingerprint attendance system It s advantage is that can put an end to the cheating of checking The disadvantages are that this kind of machine is expensive and required better quality of personnel At the same time fingerprints required cleaning It can t recognize the fingerprints if the fingerprints is damaged
96. alve research J 3 4 5 6 7 8 9 Shi Zhaomin etc The Research of Sphere Lifting Height Automatic Control System Based on Air Pressure Control Beijing the computer measurement and control 2005 12 Zhang San hui etc The university physics thermodynamics optics quantum physics 3rd edition M Beijing tsinghua university press 2009 Teng Xiao ying Douglas C Giancoli University physics M Higher education press 2005 Zhu Xi lin etc Mechanical and electrical body design foundation M Beijing mechanical industry publishing house 1997 Huang Mao lin Qin Wei Mechanical principle M Beijing mechanical industry publishing house 2002 Yang Qing Chen Gui ming Dong Zhen qi An improved high accuracy ultrasonic distance measurement method research J Computer technology and development 2010 Wang Rong rong Yang MHai zhong Ultrasonic ranging error compensation algorithm study J Industrial automation 2012 Zheng Di Tang Ke hong Electromechanical integration design M Beijing mechanical industry publishing house 1997 29 The English Proceedings of the College of Instrumentation amp Electrical Engineering Jilin University in the Second Half of 2013 The design of lowcost Vibroseis based on FPGA Qian Chenghuil Shi Zhaomin Li qi Xu qian College of Instrumentation amp Electrical Engineering Jilin University Changchun 130022 China Abstract Based on the FPG
97. ance is saved with point clouds information Place object on the axis of the of the rotation center of the stepper motor controlled platform Step 3 closed dot laser open linear laser and adjust the focal length of the camera to start scanning again In order to make the image processing easier a detachable and laser wavelength matching band pass filter can be added to reduce the interference of light Step 4 after each scanning remove the filter and film imagers add filters open the stepper motor to rotate the scanned object the digrees of rotation 1s 36 Step 5 repeat step 2 3 4 for 9 times until the scanned object rotates 360 degrees Then the 3d point clouds and image registration stitching together to form a complete 3 d point clouds model 44 2 3 Major processes of rebuilding models As surface factors of the observed objects scanister and some other factors will result in some noise points we need to make some filtering and optimizing processes Using David laser scanner software implementation point clouds scanning acquisition the output contains the point clouds vertex coordinates and surface coordinates obj format file In order to create a subsequent surface we need to rebuild a polygon model via using lines Curve surface is composed of several minute surfaces which is regarded as visible mesh model After the point clouds files being process by matlab they can be roughly showed in the matlab interfac
98. and Inverter control with Automatic water supply system design J Mechanical Engineering Technology 2005 1 54 56 10 SI Ge Robots in the 9 11 Rescue Application J Fire Technique and Products Information 2003 7 44 47 11JJIANG Xue run LI Zhong hua MAO Zong yuan Realization of Serial Communication Between Intelligent Module and Host Computer in VB Environment J Automation and Instrumentation 2003 6 61 63 12 LIU Jin guo WANG Yue chao Li Bin Disaster Rescue Robot Research Key performance and Outlook J Mechanical Engineering 2006 12 1 12 13 DONG Xiao po WANG Xu ben Rescue Robot Development and Application in disaster relief J Disaster Prevention and Mitigation Engineering 2007 01 112 116 70 Xu Li xia etc Development of early detection instrument for apnea syndrome Development of early detection instrument for apnea syndrome Xu Li xia Wang Gang Lian Shi bo College of instrumentation and Electrical Engineering Jilin University Changchun1 30022 China Abstract Aiming at low levels of detection and penetration of sleep apnea syndrome a portable early detection device of sleep apnea syndrome is designed The system is composed of signal acquisition module data storage and transmission module host computer data processing module and an automatic detection program We use electret sensor to convert respiratory and heart rate signal and collect the respiratory data through micro cont
99. apons in security systems For example the United States C amp K 2 300 series and MONITOR monitor software United States ADEMCO 4 110 series burglar alarm systems domestic production of such products as Kang Bite electronic technology Research Institute CPT 302 paging alarm system Such flexible system using microcomputer software CorelDraw management is simple convenient and graphics by the rich features such as monitoring software can monitor dozens of even hundreds of controlled extensions performance price ratio is higher China s smaller systems do not form a series and the commercialization of products only some simple monitoring system of microcomputer software such as Kang Bite electronic technology Research Institute CPT 302 paging alarm system etc With the rapid economic development of society and the continuous improvement of people s living standard people need an intelligent home security alarm system Home monitoring system in the past due to poor reliability single function or expensive and hard to spread 10 with the development of Zhang Yixuan etc Intelligent alarm system based on MMS electronic communication technology single chip microcomputer based on its small size low price high integration high performance advantages are widely used in many ways 4 at the same time sending phone supports MMS reception is not uncommon in the family thing so take advantage of phone SCM components to develo
100. arameter Further writes as x a t mt Use the straight line parametric equation random to express two coil sides on Supposes a coil side two vertices is a Dk Ck and ak 1 Dk 1 Ck 1 May result in M a k gt N A 1 Ak P Cy 1 Cx Substitutes into 5 ix a t mt y b nt 6 Z c t pt From this may determine parameter the range of t is 0 1 Substitutes into 3 M ij Hp in j MaMa tN tgddt dt 7 _ _ E EE T ic Mm 1 T Lc kk aa wl dn 0 O apatimate Opetigts H bpa tintin bpa Mati Cpa Pa te Opt pata Using espression 7 can changes into the integral only has two variables the integrating range is 0 1 Summing the mutual inductance of each side we can obtain the final mutual inductance For the multiturn coil the turns of two coils respectively are N and No they have certain thickness using espression 7 to calculate the mutual inductance between the single coil then sum them 2 THE MUTUAL INDUCTANCE OF POLYGON COIL AT ARBITRARY POSITION Regarding the arbitrary position polygon coil in the space we can use the three dimensional coordinates revolving matrix to carry on the coordinate transformation Suppose the source coordinate system is O XsYsZs the goal coordinate system is O X7Y7Zr two coordinate system zero point translation vector is Ax Ay Az any add on the zero point translation vector in the source coordinate system coordinates namely to obtain this spot in goal coordina
101. arking As can be seen from the test results heading angle control at 15 75 range the car model can achieve rapid automatic parking parking warehousing high precision good stability of the system 5 CONCLUSION Design of automatic parking system not only to complete the model car automatically find the smallest empty spaces and the use of fuzzy control method to achieve three parking spaces for parking but also uses voice module for voice reminders as well as reversing the car back on the display of the road information the laboratory parking system model design more humane intelligent Automatic parking system for the parking lot are not familiar with the novice into place to provide a convenient but the current automatic parking system still does not do automatic but there are some shortcomings Therefore automatic parking system for today s automotive research design appropriate to the current domestic environment parking system model can be developed for the market of small and medium car parking systems automatically provide a theoretical basis for further migration to the theoretical part of small and medium sized cars suitable for automotive automatic parking control Instead of the automatic parking system operator to observe and combined with vehicle driving judge system automatic parking place Reference 1 Lawrence Lam based reconstruction of spatial position of the automatic parking system
102. art of the sensor component semiconductor materials is under deformation of stress the internal resistance of Result display Chen Changsong etc Design of Gravitational Acceleration Measuring Device Based on Balance Method the circuit connected to the sensor will produce corresponding change which changes the output voltage value Six pressure sensor output voltage value through filtering and six channels of A D transformed from regular hexahedron system to collect various surface by pressure value And according to the resultant standards and Newton s second and third law the gravitational acceleration in regional systems can be calculated According to the balance method in classical physics 7 analysing the system including regular hexahedron and non magnetic steel ball it shows that when the system balance there are at least one side forced up to three sides are forced in the regular hexahedron and they are vertical to the adjacent ones as shown in figure 2 a Force on One Surface b Force on Two Surface c Force on Three Surface Figure 2 Stress Analysis of Different Situation In the the figure Fl F2 F3 are the support from hexahedron to the nonmagnetic iron ball on the certain face and G stands for gravity of the nonmagnetic iron ball 1 2 Algorithm Analysis F1 F2 F3 F4 F5 and F6 are supports from regular hexahedron to nonmagnetic iron ball as shown in figure in figure 3 Figure3 Stress
103. as simple wireless transmission distance is long low cost advantage In the design of single chip microcomputer and LCD power consumption is more lead to the problem of lower charging current so use low power chips and liquid crystal display the charging current can be improved THE HARDWARE SYSTEM DESIGN The wireless charging system design using electromagnetic induction principle the use of coil coupling to transfer energy Due to the wireless transmission of power voltage with energy sending unit and receiving unit coupling coil spacing D may change in the test lead to different charging voltage change of distance design considerations for safety so charging ways on the choice of constant voltage charging scheme On the device select select has a variety of power saving mode power consumption province in particular Strong anti interference force of MSP430 ultra low power MCU series MSP430F2274 as monitoring of wireless transmission can charger control core chip voltage and charging time display with low power consumption LCD1602 LCD screen to improve the utilization efficiency of the energy of the charging circuit The English Proceedings of the College of Instrumentation amp Electrical Engineering Jilin University in the Second Half of 2013 generating circuit STC12C5A608 2 MCU Conpl F rectifier resulator device Fig 1 System architecture 1 1 Oscillator circuit design Transmitter circuit con
104. asic can generate scores students got based on the standard 12 Lower machine N n N L N nRF24L01 SeN 7 Interface Dy i lt Lower machine 2 N nRF24L01 Interface N N N i NG j nRP24L01 N N Interface SCM Lower machine NI nRF24L01 B 1 N s Foa eaaa Interface N N N SCM Zigbee circus PC Fig 7 Schematic of multi machine communication 3 SOFTWARE DESIGN Since 51 MCU kernel supports the C programming language so we use the C language to develop the lower machine s software 13 The host computer uses Visual Basic language to develop the software The whole system program uses a modular design block is independent Accordingly it 1s easy to modify and approach Each subroutine Relatively adjust later The two sensor s signal output ports of the lower machine respectively connected to the MCU external external 1 Software interrupt 0 and interrupt determines two nested interrupts relationship according to the sequence of two sensor signals Then we can determine whether the people is coming in or go out When the MCU receives an external interrupt signal it jump into interrupt service routine After the interrupt service routine processing has done it return to the main program When the s
105. at this circuit realizes the signal amplification from the figure below 72 amp FiRH XSC1 xs J gt Ria jB _A jS B 2 560 s 61 195 mV 47 610 mV ka RIF Ext Trigger 4 Ti T2 9 T2 T1 RHEA jB A 8B he bki 200 ms Div beii 200 mv Div kkil 200 mv Div ba F ale I Xft 0 yg 0 4 Yee 12 AF b m yr pst e alafe ac o foc aclo foc xm ee mel Bahl x Fig 4 The simulation diagram of signal acquisition circuit The waveform of actual measurement of lung signal is shown in figure 5 GY INSTER EDGE FOC eee oo Fig 5 The waveform of lung signal 3 DESIGN AND IMPLEMENTATION OF SOFTWARE 3 1 SD card storage The function of SD card storage section is to store the respiratory signal after AD conversion to SD card for the purpose that we can call up the data for analysis later Data is stored using the FAT16 file format 11 12 SD card partition of this file format is shown in Figure 6 MBR is the physical sector 0 of SD card reserved area 1s to store parameters and guiding figures of FAT file systems FAT cluster table records the usage of cluster root directory records the root directory information and file directory is the actual data store MBR sector FAT list DIR sector File directory data sector Fig 6 The storage structure of FAT 16 MSP430 reads and writes SD card through the SPI bus 13 MSP430 firstly initializes SD card and gets Xu Li xi
106. ation and Electrical Engineering Jilin University Changchun130022 China Abstract The design of this article is to make a LED smart lamp to the microcontroller of STC89C52 for core integrated using pyroelecticity infrared sensor collecting light and the control of PWM wave When people close to light on when people go away the light off And it can warn your sitting posture If lighting outside strength light changes automatically changes function energy saving and environmental protection We can also change the model of light manually and achieving no shadow better in protecting eyes It can meet the needs of different people also with a certain market value Keywords Intelligent lamp STC89C52 SCM Infrared heat release PWM control INTRODUCTION MYOPIA has become the important issues affecting the health of our people A few daysago according to China the United States and Australia collaborate on prevention of myopia in children research project survey showed that our population myopia prevalence of 33 the country suffers from myopia number is close to 4 billion is the world average 22 1 5 times In high risk groups young people with myopia and myopia prevalence is as high as 50 to the 60 our country is one of the countries with the highest prevalence of myopia myopia number first in the world so myopic question cannot be ignored Year 11 42835 kilowatt hours Primary industry consumption grew month
107. bit as high as the frequency setting 4bit control word and according to need the flexibil ity to modify communication digits and format FP GA during receiving process has always maintained a high impedance state and will transfer the 32bit serial data into parallel data after receiving 3 2 Frequency setting According to the system detection requirements it needs to emit single frequency dual band and tri b and sine wave sine wave for dual band and tri band to keep the last frequency point on a latch unchanged when setting next frequency point appear in the system before or after the rising edge of the clock at any time If you want to trigger the correct data sampling must meet setup Tsu and hold Th time Otherwise it will result in metastability design The design should be synchronous and the input signal is asynchronous with the system clock to make the signal to synchronize the clock relative to a position that will synchronize asynchronous combi national logic By means of this way it is good to avoid the asynchronous logic which may result in sub steady state problem 133 The English Proceedings of the College of Instrumentation amp Electrical Engineering Jilin University in the Second Half of 2013 3 3 Accumulator At each rising edge of the system clock the accumulator accumulating step of the value of the frequency control word the accumulator is set to 28 Each 1 f time is to complete a full increment
108. c control method the sphere lifting height can be controlled by controlling the lifting pipe pressure We accomplish the quantitative control of pressure valve closing degree by quantitative control of stepping motor rotation This scheme can realize the lift tube pressure adjustable so as to realize the object movements to a specified height Temperature is constant at room temperature Stepper motor turning angle of 0 the radius of stomatal patch is r the speed of the pump pumping gas is V the valve conduction time is t the actual lifting height of a sphere is H ventilation tube bottom radius is R the total air inflow is L the volume of gas is V the amount of substance of the gas is n According to the thermodynamic equations 3 of ideal state of gas and gas velocity formula 4 we can establish the relational model of the pressure and sphere lifting height The process 1s as follows According to the thermodynamic temperature relation PV nRT 1 We can get V nRT P 2 In the formula R is a constant 26 Gas velocity formula 0 L ar vt 360 3 Due to then oc L n KL 4 In the formula K is the unit of gas input corresponding to the amount of gas material and it s a constant H 7RI2 V H zmRI 5 By the above formula we can obtain RTK 0 rxt A _ P 3600 R 6 By the above formula we can know that the sphere of higher level only relates to the motor rotation and
109. c lock startup password increased security features Its design circuit is shown in Figure 7 90 Figure 7 Counter display circuit Lock parts Password lock preset password is stored in 24C04 When a user with no key can start code lock unlock can use any cell phone and home phone to communicate At the same time users can also lock startup password in business trip or long term absence to further strengthen the anti theft function Design of circuit in Figure 8 LCDI unis a Bet os gcunsess vit wie ed ot Lid dhe 5 o mey o ajn Figure 8 The password lock circuit design 4 SOFTWARE DESIGN Software design Keil software written using c language into 11 including master programs and code lock program Master programs are primarily responsible for the change in signal acquisition sampling to convert analog signals into digital signals 12 in the monolithic analysis and calculation for transmitting digital signals and then sends a response signal control modules 3 the code lock program major process is the LCD prompts to begin selecting functions through keyboard lock 10th 13th password changes and save Zhang Yixuan etc Intelligent alarm system based on MMS When a user is unlocked through keyboard input Lock code If the password is entered correctly the LCD prompt the password is correct LED light indicates the lock If your password is incorrectly entered the LCD
110. ccccccccccccccceeeceeeeeeeeeeeeeeeees ea E E TE OUTS e RE UTE ORT IU EOC ORC RRS Ee ES Tee teem Qian Chenghu1 Chen Changsong 36 A 3D scanning and laser ranging device based on Triangulation ccccccccccccccccceeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeseeeeeeeeeeeees ee a ee et a St ere Te te eet Se rr ea CHEN Hao HAN Xing Zhi TANG Xiang Mei JIANG Tao 42 The Design and Implementation about attendance system used in campus classroom based on RFID technology isha alk ean Le Li Jiaoyang Wu Ziyu Piao Guanyu 48 Intelligent Multifunctional lamp cccccccccceeeeeeeeeeeeeeeeeeeeeeeeeeeeeees Zhang Zhuo Chen jie yuan Zhang Wei 54 XYZ three axis stepper motor control system cc ccccccececeeeceeeeeeeeeeeesesseeeeees NieYang LiTengFei LiuHui 58 The dormitory intelligent security alarm system based on GSM wireless communicatioNn ccccceeeeeeessseeessseneees See EE E eee eT PTE eT te eee Ny er terre ne emer eee nee ee ee E eee JiaoLe1 ZhaoYue WangZhengyu 62 A post disaster Detection Rescue Robot System Designn ccccccccccccccccccceeeeeeeeeeeeeeeeeeeeeeeeeeeeeeseeeeeeeeeeeeeeeeeeeeeeeeeeeeeeees Sistah catalog sw E NEEE SEE EI EN HU Rui fan WANG Hong chao PENG Yi shuai 66 Development of early detection instrument for apnea syndrome Xu Li xia Wang Gang Lian Shi bo 71 Design of nRF905 based Wireless Greenhouse for Environmental Parameters Detection and Transmission System E E E A E ENEA E N
111. cedures Bluetooth Terminal node which is the slave module is used to send data The RX pin of Bluetooth slave module is connected to the TX pin of the MCU and the TX pin is connected to the RX pin of the MCU Flow chart of transmission procedures is shown in figure7 We use this communication format 8 data bits 1 stop bit no parity bit 3 2 2 The Bluetooth master node Master node which is the Bluetooth master module is used to receive the data the data is transferred to PC via serial port on a machine and then automatically saved and finally analyzed by MATLAB 3 3 Program design using MATLAB The design uses MATLAB software to achieve three functions serial communication data processing and the interface display Data processing is divided into two parts one part is to extract the lungs respiratory signal from ECG the other part is to filter the nasal respiratory signal Program flow is shown in figure 8 Firstly the program judges the model and determines the source of data then separates the two signals and judges which is nasal respiratory signals or ECG finally processes data respectively and shows the waveforms in the GUI interface and also gives Bluetooth mode Open serial port analysis SD card reading Serial port data reading Singals deviding Mean filter y PEak value Data getting lt
112. ch applies to teaching and scientific research Key words eravitational acceleration balance method piezoresistive transducer nonmagnetic iron ball GRAVITATIONAL acceleration is an important physical quantity whether in the physical laboratory or in scientific research and applications measuring gravitational acceleration is of great significance 1 At present in the field of the gravitational acceleration measurement the methods of air track and Doppler effects is the more advanced ones Now our country has breakthrough in this acceleration measurement to the outside world step by greater field gravitational step 2 Technology level and research depth is steadily rising in field of research method acceleration are the free fall method the simple Common of measuring gravitational pendulum method slope method balance method and dripping method 3 etc The accuracy of traditional measurement is not high and of the device volume is clumsy Traditional balance method respectively figures out mass m and weight G of object with the balance theory and gravity acceleration g G m can be obtained Due to dynamometer is inaccurate which causes the gravity the accuracy of the traditional spring measurement error 4 And in the artificial measurement many factors such as artificial record can lead to inaccurate data Based on balanced method using piezoresistive sensor the gravitational acceleration measurement
113. comes with two way feedback circuit that is current feedback and voltage feedback wherein the current feedback positive and negative corresponds to the 1 2 feet of KA7500B Output current produces a voltage drop at the current sampling resistor The pressure drop through resistor R9 R10 and R14 R15 feedback back When KA7500B feetl voltage is greater than the first voltage feet2 KA7500B will reduce the output pulse width 8 11 feet the current is reduced or increased pulse so that the output current is constant at the default value the current value of the following formula 0 59K I PWM _ gt 0 59K 20K Where R is the current sampling resistor positive and negative feedback of the circuit voltage corresponds to the 15 16 feet of KA7500B After power microcontroller output PWM voltage to KA7500B 15 feet as the voltage reference Output voltage through the voltage sampling resistor divider in the front compared with the voltage reference when the voltage is too large decrease the pulse width when the voltage is too small increase the pulse width so that it remains constant output voltage value while the output voltage set by key ensure maximum output voltage and current does not exceed the rated battery charging limitations imposed by the receiving end of a USB cable to connect the phone charging port its output voltage to the following formula _ pwm 16495 10k y out 2 PROCEDURAL FRAME
114. complete pedestrian dead reckoning PDR such as Lei Fang 1 extracted motion information by the sensors worn on the pedestrian waist and transmitted the information to the computer to complete pedestrian dead reckoning Lauro Ojyeda 2 set the gyroscope and three dimensional accelerometer on the foot to extract information then transmitted it to a computer and use Matlab software for 3D image processing SUN Zuolei 3 used the particle filter and probabilistic neural network to identify and filter the pedestrian motion information and improved the accuracy of pedestrian dead reckoning However the information of PDR of these designs is produced by specialized software on the computer it is not very useful while in the outdoor the portability of the computer is not high so the development of a portable practical pedestrian dead reckoning device is very necessary For the above design shortcomings combined with the characteristics of pedestrians dead reckoning we design a portable and practical pedestrian dead reckoning device It uses electronic chip LSM303DLHC and gyroscope integrated chip MPU3050 multiple sensors three dimensional accelerometer and compass integrated ensure the accuracy of collected information of ARM Cortex M3 micro controller core STM32F103RBT6 as a data processing unit The real time processing pedestrian pedestrian movement and dead reckoning information is displayed on a TFTLCD which has high data processi
115. convenient called personnel alarm in a very short time to make a precise and rapid emergency treatment Key words GSM Single chip microcomputer Alarm system 0 FOREWORD AS an important part of society the problems of safety management of colleges and universities are increasingly on the agenda Students dormitory is college students life study rest home is a place where students live longest and its security or not is directly related to the students vital interests affects the normal study the life order of students and the school s harmony and stability My campus is located in the downtown liquid and students safety consciousness is not strong so lead to theft fire and other events occur which cause serious damage to the property and life safety of students Therefore the safety of the college students dormitory is related to the steady development of colleges and universities and students physical and mental health At present the traditional security such as bedroom burglar mesh window etc exist in the actual use of other never stolen Ann window close to the floor of the hidden trouble of the emergencies is not easy to escape And common security alarm system on the market at present way of communication such as fixed telephone dial up are easy to be a rogue in front of the house to cut off the telephone line is busy or malicious make its failure in critical moment Ethernet are also faced with the hidd
116. convert digital signals through P6 6 via internal ADC12 SCM processes signal through effective program algorithm and output the appropriate control signals a avec i Clo DI Il E i j JE SXTAL Miar Genz 3 45 y l F ae im Ae E a5 PIHE 4a 4 eS i 10 a1 i a0 12 Er 13 Ed ENABLE 14 sec seseagenesees esp ee es Gg ed Cd a od fe ee E Figure 7 Single chip microcomputer minimum system 100 2 1 3 Automatic reclosing relay circuit Transmission line voltage is very high If we want to directly control the high voltage and large current it is not easy to implement and more dangerous So this design uses the single chip microcomputer to output low voltage signal to control high voltage line But the connection part between the low voltage circuit and high voltage circuit must provide a good electrical isolation The relay is connected to the high voltage circuit and low voltage circuit element and the isolation effect is good This design uses two HK4100F DC3V SHG relay to simulate reclosing operation One is used as main circuit recloser for the second time the other is used as standby power switch When the circuit is failure and the closing operation is still not complete another relay enables access of emergency power to supply circuit to make electrical equipment continued to work Relay power is 3 3 v Output of high level of the MSP430F149 MCU is about 3 2 v and the low level is b
117. cquisition By input the transformation of the digital quantity data processing unit controller for data calculation and processing to get the final gravity acceleration value and through the man machine interface the result is displayed Fig 4 Voltage transforma tion aspliq uo se yy I 1JT duwe PU UOT BOT JT due eT uerTesJ Tp Power supporting Voltage regulation Jd7 Y 10419 4 Ng UOTSIAAUOD SsUTSS9001d eged Figure 4 Circuit Principle Diagram For the output signal of the pressure sensor is small signal is tend to be interference by power frequency noise and other noise it needs to be amplified and filtered before analog to digital conversion Filter circuit can use second order low pass filter circuit as shown 1n figure 5 INTOUT OUTOUT Figure 5 Second order Low pass Filter Circuit 38 Using second order low pass filter 10 circuit to rid off 50hz interference For the filter characteristic curve is 3 db by frequency interference and _ noise the angular frequency thus set a cutoff frequency at n 33 hz Second order low pass filter circuit s structure is simple whose high input impedance output impedance 1s low so in the case of the circuit parameters set reasonable can satisfy the requirement of accuracy in the system at the same time to achieve the ideal effect 2 2 Software Design A D converter samples for several times from six channel and collection objec
118. ct is good low cost no wiring easy to carry and other advantages has a broad application prospects Keywords STC12C5A60S2 MCU intelligent wireless charging FOREWORD PHONE needs the corresponding charger most chargers can not be universal and compatible portable wired charger and charge the user is not easy So a no charger charging technology to be developed Nokia 920 handset with a wireless charging technology using electromagnetic induction principle sending and receiving end have a coil transmitter coil is connected wired power generating electromagnetic signals Receiver coil induction sending electromagnetic signals to generate current to the battery But Nokia 920 wireless charging you need to put the corresponding wireless charging plate once more than 2 cm can not be charged and the production process is visible increase the complicated expensive transmission distance is a wireless charging technology should pay attention to the issue This design uses the same principle of electromagnetic induction to generate energy through the coil coupling hardware circuits are transmitting and receiving ends of two parts transmitter using NE555 with the RC oscillation circuit constituted as a power amplifier using FET devices Receive comprised BUCK chopper circuit voltage type step down DC DC conversion circuit realized steady flow Transmission distance can reach 5 10cm voltage 5V 0 5A current stable charging H
119. curately 3 THE SYSTEM SOFTWARE DESIGN System software design is divided into control section and execution section the control section is mainly responsible for parameter setting data storage data transmition and the liquid crystal display Execution section is mainly used for data reception the algorithm of sweep frequency signal as well as the algorithm design of cone signals The executable program design is related to whether the signal generator can generate signals which conform to the requirements of the system design 31 The English Proceedings of the College of Instrumentation amp Electrical Engineering Jilin University in the Second Half of 2013 Ti Bl oe i Eg i ir af ET F ip g A imta fel Er HTE e e a Figure 4 system overall design diagram Figure 4 is diagram of the overall system design According to the design block diagram first the top level module is decomposed into a series of submodule then using VHDL language and IP to check each submodule for designing and finally packaging submodule generating schematic symbols using principle diagram to complete the top module design 3 2 Sweep frequency wave module design Scanning signal also called chirp signal which refers to the continuous oscillation signals that instantaneous frequency monotone changing over time in other word the instantaneous frequency is the linear function of time By improving the Direct Digital Frequency Synthesi
120. d button switch on These above all use the SerialPort If the The curve between actual voltage and displayed voltage is more than the threshold voltage font color voltage 1s shown in Figure 14 turns from black to red for alarm 4 CONCLUSIONS The design completes the desired goals Measure the voltage value control there closer relay and other external device and realize the PC remotely display and control by the SerialPort It is efficient convenient od oh 9 0 oY 0 9 and practical It has a certain market prospects In the N O 6d O O O eG OQ O SPP LPP PAP a future work we will use wireless or network data Actual voltage V transmission instead of cable transmission complete voltage signal acquisition module optimization and Fi 14 Th bet tual volt d displayed E Aa eee ce sare Ea integration to improved PC control function voltage It can be found through the chart and diagram that Reference the curve between actual voltage and displayed voltage is closed to linear change It proves that the i 1 Yuan Yue Zhang Bao research status quo and device for measuring the voltage is really reliable and useful prospect of automatic reclosing in power 3 2 The single chip control results analysis system J China 1997 44 47 a Single chip can receive and display the actual 2 Zhang Xiangjun traditional and modern voltage values in real time Error less than 1V l analysis of microc
121. d which is measured must be transparent and depends on the optical imaging lens In order to achieve the rise or fall of the water level the linear array CCD 6 or the linear arrangement of fiber optic sensors 7 is used so that the detection resolution is improved but the cost is greatly increased In conclusion the contacting liquidometer has the defect of easy hanging dirt short working life high price etc And the caustic liquid can t be measured The refracted detection equipment can only measure the transparent fluid and depend on the optical imaging lens and its anti interference capability is weak In order to overcome the defect talked above this study designs a kind of discontiguous reflected liquidometer system which has the characteristics of low cost high resolution high sensitivity and high anti interference capability The application of GSM technology makes it possible to detect the house leakage and alarm in distance when no one in the house Once the water level changes the system can measure the signal immediately and send the alarm message to the user s mobile phone 1 HOLISTIC STRUCTURE The holistic design is shown in Figure 1 the system is consist of discontiguous reflected sensor MCU GSM LCD screen and power supply is not shown in the figure The output of the discontiguous reflected sensor 1s connected to the MCU input the outputs of the MCU are connected to the LCD screen and the GSM The
122. dge signal occurred The uncovered state The uncovered state oo A Sensor J r S B Sensor Students enter the classroom status The uncovered state The uncovered state TI i C Sensor TE The uncovered state The uncovered state on D Sensor a Students out of the classroom status Fig 5 The output signal timing diagram 2 1 2 FM1702SL RFID Card Reader 49 The English Proceedings of the College of Instrumentation amp Electrical Engineering Jilin University in the Second Half of 2013 FM1702SL s internal transmitter can directly drive an antenna which is at close range without additional active circuitry The receiver part provides a reliable and efficient demodulating and decoding circuitry for ISO14443A compatible digital transponder s signal The part handles framing and error detection 7 This provides readers terminal s design great flexibility It can achieve read and write capabilities just need a small amount of peripheral circuits because chip has highly integrated analog circuits FM1702SL s peripheral circuit is shown in 0 120 330 150 Figure 6 ANT Hos U Fig 6 FM1702SL Peripheral circuits 2 1 3 Buzzer Circuit and Display Module The main function of the buzzer is to remind the students of operational errors when their operation is wrong Display Module use LCD12864 to display the student s name number and status when he
123. diode calculators the passenger flow on the bus then acquired the current location and speed through GPS and sent these information to receiving part i e the bus stops and Transit Company Dispatch Center by wireless The passengers who was waiting at the site could observe operating conditions through the LCD of the bus stops in order that the passengers would make the most rational choice saving time to facilitate travel Transit Company Dispatch Center would schedule bus trips according to passenger flow conditions in that way could help conserve resources and satisfy transport needs Keywords bus GPS MSP430 people counting wireless communication consist of radiating portion and receiving portion 0 INTRODUCTION THE present situation of the urban traffic is not optimistic especially the peak commuting in my opinion in order to solve this situation there are two ways to go on the one hand improving the situation of road and enhancing road construction on the other hand enhancing the management of road and improving use of existing resources though the government is going on the first way but there are a lot of works to do relatively speaking the second way can remit current situation quickly and effectively so this passage do a research about the second way current bus is a great resource if we can use it effectively it will improve the current situation obviously as the same time we can achieve the energy conservation and emission
124. e above advantages rescue robot is described in this article the competitiveness has a great advantage has wide market prospects and market application prospect Reference 1 WANG Zhong min LIU JunDOU Zhi etc Research and Application Status and Development of Search and Rescue Robot for Mine Disaster J Coal Mine Machinery 2007 11 6 8 2 CAI Zi xing Robotics Trends and Development Strategy J Robot Technique and Application 2001 4 188 216 3 JIN Mao qing QU Zhong ping ZHANG Gui hua Foreign industrial robot development trend analysis J Robot Technique and Application 2001 2 6 8 4 ZHANG Zhen xi Rescue Robot Multi sensor Information Fusion Technology Research Abstract D Mechanical and Electronic Engineering 2011 5 CUI Ping WENG Zheng xin Design and Realization of Robot Extinguishing Fire Creative 69 The English Proceedings of the College of Instrumentation amp Electrical Engineering Jilin University in the Second Half of 2013 Experiment J Research and Exploration in Laboratory 2006 3 294 296 6 LI Bin Snake like robot research and application in disaster relief J Robot Technique and Application 2003 3 22 26 7 ZHU Hong ZENG Xiang jin Multi sensor Information Fusion Research J Computer and Digital Engineering 2007 12 46 48 8 Wasim Angaa Fu Hua ming Summary of Active Filter Circuit Design J Electronic technology 2010 6 72 73 9 MAO Hao xi PLC
125. e and the point clouds information extraction is stored in the mat format data files we can use Blender to process obj files filter out redundant information and join multiple model together mashlab can be used to view the last result meshlab provide with filtering function can make the images much more smooth and clear then texture mapping with mashlab the principle is a transmission mode of Near bigger and far smaller Camera and the laser transmitter unit level calibration y Camera calibration Stop once every 36 degrees until the object rotates Laser T Image Acquisition Scanning i Image filtering denoising smoothing Noise removal point cloud registration and stitching Triangular griding Images and point cloud Texture Mapping Fig 4 The flowchart of 3D scanning and 3D reconstruction 3 THE DESIGN OF SYSTEM 3 1 single chip peripheral hardware design The hardware design circuit diagram is as shown in figure 5 3 2 Software Design CHEN Hao etc A 3D scanning and laser ranging device based on Triangulation The program flow chart of single chip microcomputer controlling steering is displayed in figure 6 The rotation range of the steering gear is about 30 degrees deviating from of the median line on both sides At first it turns to the maximum angle and then slowly rotates back and forth Stepper motor and the
126. e events these events will set Shape controls Boolean flag true or flase by the calculated value of the flag the value will decide the corresponding LED on or off Set a MSComm serial control to communicate with the slave controller The form initialization process initializes the MSComm control and open the serial port set the baud rate and parity When you click Modulo and Send button the program automatically calculates the user drawn background graphics font and font convert a hexadecimal number into the serial output buffer the data will be sended 3 Form inti Display init Port init Jf Button click Mouse click Mouse move l l l The Corresponding The shape on or The line on or opperation off off Figure 3 PC software flow chart 2 2 Slave controller Slave controller uses ST Microelectronics stm 32f103 zet6 chip that has io resource rich on chip storage space big advantage 4 and the operation is fast cheap the chip uses the UCOSII operating 86 system with UCGUI 5 graphical user interface you can get a good operating feeling UCOSII operating system in addition to the prerequisite tasks also established LED matrix scanning tasks 6 touch screen reading tasks TFT screen refresh task serial communication task four tasks one serial port communication tasks with the highest pri
127. e imager sensor are 640 X 480 shootting speed is unstable Therefore the accuracy is not high Because the components used are entry level it is not very stable and quality of real time feature still need to be improved However the hardware software design isn t very mature so it can t be put into application temporarily References 1 Nong Jun bin triangular mesh generation algorithms a LIDAR point clouds Red River J 2011 05 170 172 2 Li tian Lan 3D point clouds data processing and application of D Kunming Polytechnic University 2011 1 of 33 3 Xu Gang forward to establish a 3d model M by the two dimensional images Zheng Shun Yi translated Wuhan Wuhan University Press 2006 4 Wei Hua Fu Yong gang Zhang Xi wen drawn based on the image of the point clouds modeling its realism Computer Engineering and Application J 2010 20 4 8 5 Three dimensional laser scanner hardware design and implementation J SUN Silver Li Zhong Ke Yao Sen microcompute development J 1995 01 11 13 6 James C Savage J Kevin ONeal Robert A Brown Powered Low Cost Autonomous Attack System coopera tive autonomous wide area search munitions with capability to serve as non traditional ISR assets in a network centric environment J SPIE 2005 5791 61 69 7 Robert Hauge LADAR puts the puzzle together J Spies oemagazine 2003 4 18 22 8 Stamos P E Allen 3 D model construction using
128. e need less components but it has harsh requirements for the quality of photos as well as the shootting angle and distance it is not easy to realize For the third one the rotation of the servo and real time scanning aren t easy to be synchronous For the second one it is easy to control the rotation of step motor and the rotation is relatively stable So the second scanning mode is adopted 2 PRINCIPLE AND PROCESS OF THE EXPERIMENT 2 1 Principle Point clouds data obtained by non contact measurement linear laser scanning Through the triangle range principle The close proximity of the points form a dense surfaces the method used 1s analogy and approximation Its advantage is the high accuracy the disadvantage is the large amount of data the higher requirements of the surface of the object such as an object to be reflective opaque the transparent surface such as glass and stones and the mirroring polishing treatment very shiny objects such as metal fluffy and fuzzy substance feathers and fur can t be scanned The scan view field of the three dimensional point clouds scanning 1s a domed visual field And the mode is linear laser scanning The suitable distance is within 5m if use camera with bigger view angle or more powerful laser we could realize the aim of ranging farther Measurement accuracy is of positive correlation with the narrowest width of laser light power of the laser the pixels of the image
129. e program will calculate the actual distance based on the ordinate value obtained 46 Fig 9 fitting function of range from 215 mm to 400 mm 4 RESULTS A obj point clouds file of a cell phone case and plastic box is displayed in figure 10 scanned at a certain viewport which are put on a rotating round wood shale Fig 10 The object and scanned texture mapping renderings Matlab data the number of vertices of the three dimensional point clouds surface is 10381 the 3d point genting number of points is 6229 Experimental distance is 1274 mm The distance the matlab calculation of which is 1278 mm and the difference is 4 mm The causes of difference include system error and random error System error includes the production of stents the laser transmitter and CCD camera isn t on the same horizontal line Random error is caused by inaccurate measurement readings 5 CONCLUSIONS This experiment implements most functionality expected with a lower cost which can realize the purpose of acquiring the 3D point clouds and images of the object semiautomatically The advantages as follows self cost is little most of the softwares used are free The device is easy to disassemble and maintain and the button panel is easy to operate Some aspects still need be improved the laser is not narrow enough the power isn t enough CHEN Hao etc A 3D scanning and laser ranging device based on Triangulation pixels of th
130. e software to simulate the electromagnetic radiation environment around the screen The computer screen is seen as size is 40cm x 30cm x 2cm Tablet radiation source and we set an insulating material behind it to analog computer monitor Figure 1 shows the simulation results of the radiation 127 The English Proceedings of the College of Instrumentation amp Electrical Engineering Jilin University in the Second Half of 2013 Figure 1 computer monitor electromagnetic radiation simulation diagram 2 INTEGRATED DESIGN AND OPERATING PRINCIPLE Electromagnetic radiation measuring instrument consists of sensors filter networks amplifying section the rectifier circuit analog to digital conversion data processing unit chip display and alarm parts and other components the basic components of its hardware block diagram in Figure 2 shows Three component coil Digital to analog conversion Amplifying circuit MCU control and handling Figure 2 Block diagram of the hardware The system uses 10V battery Electromagnetic signal is fed into filter network and amplification circuitry Then enter the analog digital converter module the converted digital signal to the microcontroller for processing In programming the of the radiation power density it is displayed on the LCD module and has a peak hold and peak display At the same time when the data resulting data is calculated the size electromagnetic exceeds the l
131. e the front rear axle midpoint coordinates of the vehicle represents the front wheel angle represents the body heading Angle l represents a vehicle wheelbase 1 represents speed of rear axle center Simplification of the vehicle kinematic equations are vp cos cor g vw coz T T F vsin cos v sng tan From the above analysis of kinematic equations obtained at low speed the motion trajectories of the rear axle center model caras acircle and the circle radius only related to the vehicle front wheel Angle According to the practical design of vehicle size in proportion to design the car model and the parking in Matlab Simulink Ackerman steering model provides a good theoretical environment and set up foundation for the design of fuzzy controller for the following 1 3 Design of fuzzy controller with automatic parking 138 Fuzzy control is a kind of computer control method based on the fuzzy linguistic variables the fuzzy set theory and fuzzy reasoning and the system is suitable for the complex mathematical model Fuzzy control inherits the natural language habits natural human language the concept of mode of thinking and image habits methods application of fuzzy control in automatic compared with other traditional control parking system more widely The fuzzy controller of automatic parking design includes vertical parking fuzzy controller design parallel parking fuzzy contr
132. e the phase increment per cycle so as to change the output frequency As the address of the memory the output of the accumulator address the discrete data of the memory and turn the result of DAC and low pass filter output waveform after the smoothing filter 2 THE OVERALL SCHEME DESIGN According to the order of the controlled object system is divided into three functional units the control unit signal generation unit and amplitude frequency feedback and measuring unit The system overall design block diagram is shown in figure 3 RAN HELO RRAZ H ANAANZA Rite m DAC Rig m Figure 3 system design diagram Controller uses MSP430 single chip microcomputer 3 1 Diagram of the overall system design which not only can provide control signals for the FPGA but also can measure the amplitude of generated signals by internal 12 AD Measurement accuracy can reach 0 2 mV The FPGA uses DDS principle to produce linear sweep frequency and cone signals which the source is in need of and at the same time through the plastic of measuring frequency circuit to measure the frequency of the signal The FPGA uses internal 50M crystal oscillator Signals are output after DAC conversion and the smooth of low pass filter circuit The system constitutes loop feedback network with frequency and amplitude measurement so as to control the signal frequency and amplitude ac
133. e three schemes showed above Scheme I and Scheme II have a lot in common The two scheme both use the theory that the process of induced electromotive force to produce the damping phenomenon But there is still a difference That is Scheme II directly uses the amplified induced voltage to be the supply of damping circuit From the comparison above we can conclude Scheme II has some advantages The first advantage is it has a better feasibility In Scheme I we only think about the coil will be a magnet when it meets current but ignore the important fact that it depends on the magnitude of the current So it cannot absorb the metal plate The NO 1 NO 2 circuit circuit second advantage is in Scheme II it directly uses the amplified voltage without any middle links The third advantage is Scheme II is more energy efficient It does not use a battery Data is showed in list 1 List 1 Data of Scheme I and Scheme II Maximum of Resistance of NO 2 circuit induced voltage 4 5V or so turns turns Scheme 70 4 5V or so 1 20hm Scheme 70 70 II Scheme III use the vibroswitch so it is more stable It has more simple structure than Scheme I and Scheme II And it use delay circuit display circuit and reasonable ways to control the coil and the switch So it has the good result The voltage of the coil is showed on the screen so it 1s easy to see the state of the coil 3 SIMULATION 3 1 Sketch of system simulation The fu
134. eceive laser signal The resistance 10 kQ is in series with photoresistance to low down voltage If the photoresistance 1s illuminated by laser the MCU will receive low level form the I O so that we can know the distance of the laser spot and the water level 2 3 GSM sending module Through market research we have chosen SIM300 GSM SMS module which is consumption and widely used Just insert a SIM card when using the module to the module slot If the system start GSM SMS sending module will wait for the alarm signal when the water level changes controlled by the MCU to Wang Duogiang etc Intelligent House Leakage Detection and Alarm System send alarm SMS 3 SOFTWARE DESIGN AND IMPLEMENTATION Software design of the system is consist of signal processing and SMS module 3 1 The software of signal processing This section consists of two programs Firstly the initialization of I O port and interrupt are defined and then enter the main loop The program in the main loop is used to display the water level at the time and detect changes It will send water level signal immediately once water level increase or decrease simultaneously start the message counter The program continues to display water level if there is no change of it When the level changes program start scanning from the furthest photoresistor away from the laser source If low potential signal is detected the alarm signal is generated and read out the current l
135. eclosing operation for the second time and it can be displayed and controlled by the host computer Keywords single chip secondary reclosing device remote interaction the host computer INTRODUCTION AS demand of social development for power is increasing the number of transmission line failures is growing The basic reason of these failures is a long running outdoors Transmission line is in the natural environment and it is influenced by climate flora and fauna human activities such as porcelain insulator surface flashover caused by lightning the touch line caused by strong winds the line short circuit through the birds and the branches Such failures are called transient faults which take up 90 of the entire line faults When the fault disappeared later if carried out by the operator manually coincide due to power outages for a long time most user motors have stalled and the effect of closing is not significant As a result currently on the market people use the automatic reclosing device Automatic reclosing ARC is an automatic device which automatically inputs circuit as required when the circuit breaker jumps due to failure Traditional reclosing device uses analog circuitry for a closing operation On one hand connection of device is complex there are many auxiliary equipments and high rate of wrong operation on the other hand the device could not return to the slower switching in the fault point and could not re
136. ect the TXD of MCU The receiving end of the RS 232 connect the TIOUT pin At the same time the RIOUT connecsts the TXD of MCU s NieYang etc XYZ three axis stepper motor control system sender The receiving end of the RS 232 connecting the TIOUT pin And the RIOUT connects the RXD pin of the MCU the TXD of the RS 232 connecting the RIINpin 2 2 L298 Driver module L298N is dedicated drive integrated circuit belongs to the H bridge integrated circuits are the differences and L293D increases its output current power increased Its output current is 2 a 4 a highest current the highest working voltage 50 v can drive the inductive load such as high power dc motor step motor solenoid valve etc especially its input can be associated with single chip microcomputer directly thus easily controlled by single chip microcomputer When driven by direct current machine can directly control the step motor and can realize the motor forward and inversion implement this function only need to change the logic level at the input In order to avoid the motor disturbance to the single chip microcomputer this module is to join the light coupling photoelectric isolation so that the system can work stable and reliable Figure 3 L298 Driver module wii i i wer fon E 4 7 SOND RI ce ETI i OUT ry me r GND F ver 1an L sy Lani 4 GND Rs PRE i l TiL Ti ETI rl a e iy mo ET TLE Figure
137. elow 0 7 v Console access is the microcontroller pin output high and low level When the output is high level transistor is not on the relay does not operate main circuit disconnects and light does not shine When the output is low level Q1 base voltage of transistor 3 3 0 7 2 6V R1 will be able to change the base current When the base current is large enough transistor conducts open contact of relay closes main circuit closes and led shines Diagram of relays hardware connection is as shown in Figure 8 Figure 8 Diagram of relays hardware connection 2 1 4 Voltage display and alarm circuit SCM system uses LCD1602 to display in real time and the buzzer for alarm When the voltage of entering single chip is below voltage threshold LCD normally displays real time voltage When overvoltage alarm are displayed and buzzer alarms 2 1 5 RS232 serial communication circuit Han Si yu etc Design and Realization of a Secondary Reclosing Microcomputer Device Remotely and Interactively Controlled by PC Because maximum working voltage of the MSP430 is 3 3 V when we communicate with PC by serial port we need FIA RS 232 the American association of electronic industry of EIA serial port communication protocol logic level transformation This design uses a MAX232 chip The chip makes signal from the USART of MSP430 to converse to output to the PC and sends signals which is sent from the PC to the USART We chose DB9 as RS 232 co
138. em calibration process to make the system structure further optimized Reference Literature 1 Chen Pengcheng Lin Jun Jiang Tao etc Scanning phased vibroseis system module design J Journal of instruments and meters 2004 25 z1 2 Ling Yun Gao Desheng etc Vibroseis in seismic exploration and the application prospect and problem analysis J Journal of petroleum exploration 2008 47 5 425 438 3 Zhang Hongle Vibroseis signals of harmonic distortion effect and eliminate J Journal of geophysical prospecting equipment 2003 13 4 223 230 4 Chen Zubin Teng Jiwen Lin Jun etc Nonlinear characteristics in the process of electromagnetic vibrator earth coupling analysis J Chinese science D 2005 35 4 333 339 5 Shen Yanchun Wang Huang Liang Tinggui Signal generator based on FPGA design J Journal of tangshan college 2008 2 2 6 7 8 9 Shi Zhaomin etc The design of lowcost Vibroseis based on FPGA Miller R D Pullan S E Waldner J S et al Field comparison of shallow seismic sources J Geophysics 1986 51 11 2067 2092 Lin Jun The principle and application of electromagnetic drive vibroseis seismic prospecting M Science press 2004 Jiang Tao Lin Jun Li Tonglin etc The study of phased source to improve the SNR of seismic signal J Journal of geophysics 2006 49 6 1819 1825 Jiang Tao Lin Jun Yang Dong etc Phased source directional seismic signal anal
139. ematic diagram as shown in figure 4 Layout Directive 10 1 5pF lt gt L3 3 9nH 2 11 S5pF 2 C i amp 2nH 1 Fig 4 Wireless module schematic diagrams 21 The English Proceedings of the College of Instrumentation amp Electrical Engineering Jilin University in the Second Half of 2013 Wireless including wireless sending and receiving two parts When a hammer source signal on the sensor the sensor quickly feel hammer signal pressure signal can be converted to analog signals and signal disposal by AD7705 digital signal will be sent to the main controller wireless module is controlled by a master controller will be the source signal a buzzer and LED to successfully sent by sound and light signals such as prompt The receive module real time when the received signal after first by judging whether the source signal from the controller and then data processing a successful acousto optic hint at the same time Wireless transmission part of the program flow chart is shown in The controller initialization figure 5 Data sent failure nRF24L01 initialization Read the A D information Data sent successfully A model for launch Register to restore the default value Enter the next launch Fig 5 Wireless transmission part of the program flow chart 4 SYSTEM TEST Test method The whole systemis tested by the sending and receiving of two parts the sending end and receiving endoftwo si
140. en trouble of the line is cut off The cluster system power consumption is very big network building and maintenance costs are very high and need to purchase a fixed frequency 62 point In order to solve these existing hidden trouble dormitory wireless burglar alarm system based on GSM short message module 1s designed and it is no longer dependent on cable telephone alarm but with the aid of the most reliable most mature GSM mobile network with the most intuitive form of short message or phone the place for the alarm directly to reflect to the to the user s mobile phone 1 SYSTEM OVERALL SCHEME IS INTRODUCED This intelligent alarm system based on 51 single chip microcomputer as the core processor its overall structure are shown in figure below It mainly adopts TS351 as the main communication module to collect signal communication alarm TC351 is Siemens company introduced GSM wireless communication module industry it is driven by the AT command control system alarm controller test top up SIM card and will start the information to the communication module to achieve activation network status and then send alarm information by microwave antenna to achieve short message even dial the preset receiving alarm telephone number First of all the system of various sensors which have been dealt with by SCM are collected and then output to the LCD as a way to monitor the situation of the dormitory and then through the TC351
141. ence The design we use HC SR501 models It uses LHI778 probe design high sensitivity high reliability low voltage operation mode widely used in various auto sensing electrical equipment 2 2 3 temperature and smoke sensors module The design uses MQ 2 type smoke sensor smoke sensor of this type of high sensitivity fast response el With senses the anti interference ability long life etc DS18B20 temperature changes and use LCD1602 display temperature sensor room Dormitory fire or going to happen I also smoke or gas leak sensor will detect the concentration of pollutant gases when it reaches a certain concentration the buzzer is activated and an alarm signal 2 4 GSM communication module GSM communication module select TC351 it is a new version of Siemens industrial GSM module a support Chinese short message industrial grade GSM 63 The English Proceedings of the College of Instrumentation amp Electrical Engineering Jilin University in the Second Half of 2013 H GSM short message in Chinese is in module accordance with the PDU Protocol Data Unit format send or receive up to 70 Chinese characters Chinese characters according to the UNICODE encoding unlike computer Chinese character coding SCM send SMS command to the GSM module GSM module can identify the command and send information to a user s phone number Message content for reminding safety accident happened such as gas leak the sensor will be s
142. energy saving convenient design nRF24L01 wireless transceiver module for each pin functions shown in Table 1 Figure 4 shows the nRF24L01 chip connection with circuit diagram en FONCTIONS Power rout 1 9 S3 6Ve Operating Mode Selection TA or Rte SPI Chip Select Enable Active Low Enables SPI Claecke HISO SPI Output ae ls Interrupt Output Table 1 nrf24101 module pin functions C4 Zar ETET KEE e i ls BSS DN HRF24L01 IQR MISO MOSI SCK BEE oe Peta CSN CE VCC GND D1 Figure 3 nrf24101 and microcontroller connection diagram The wireless transmitter receiver module requires power for the 1 9 3 6 V this system uses 3 3V DC power supply directly to the wireless transmitter receiver module power supply 5 V power supply the ASM1117 3 3 conversion stable DC power supply the power through chip obtained after conversion circuit shown in Figure 5 AMSINIT3 3 Figure 4 asm1117 conversion circuit chip 2 3 Serial CommunicationsModule Wu Jindi etc Wireless multi point temperature and humidity detection system design based on nRF24L01 In serial communication module we use the core member is PL2303 Prolific PL2303 is produced by a highly integrated RS232 USB interface converter that provides a RS232 serial communication device connected to the USB function full duplex asynchronous interface convenient solution The device built in USB function controller US
143. ent Multifunctional lamp 4 Peng Jinsong Li Kwan Constant current source LED Touch table lamp design J Shanxi electronic technology 2007 2 5 Beijing University of Aeronautics and Astronautics press 2003 6 Tong Shibai Analog electronics m Beijing higher education press 1999 7 Yang Bangwen Collection of practical power circuit m Beijing Publishing House of electronics industry 2003 8 Ding Yuanjie Single chip microcomputer principle and application M Beijing China machine press 2001 1 9 the Sun Sun Xiaobin Sensing technology M Beijing Publishing House of electronics industry 2001 10 Zhao Jiwen Circuit design of sensor and its application M Beijing science press 2002 11 Huang Jichang Application manual of electronic components M Beijing people s posts and telecommunications publishing house 2004 12 He Xicai The sensor circuit and its application M Beijing Publishing House of electronics industry 2001 13 R JH iggens E lec tron ics and Analog In teg ra ted C ircu its M N J Pren tice H a ll Inc 2001 14 C ray C Sw inhoeC F M y 1n et al Ta rget con tro lled in fusion o f ketam ine as ana lgessia for TIV A w ith propo fo l Can J Anesth 1999 40 957 57 The English Proceedings of the College of Instrumentation amp Electrical Engineering Jilin University in the Second Half of 2013 XYZ three axis stepper motor control system
144. ent via single chip computer command prompt warning messages to residents these messages are programmed in advance according to the type of accident direct call 2 5 other modules Other module and alarm circuit it is when each sensor detects the abnormal signal is sent to the through the microcomputer control And LCD1602 display screen microcontroller single chip is used to time and temperature of each module according to the status of the module Also includes valuables detection module which is the use of Hall sensors to monitor valuables detection module 3 SOFTWARE DESIGN The system uses a microcontroller as the main controller when the system boots after power on GSM module microcontroller single chip initialization the initialization includes selecting operating mode initialize the variable parameters flags etc and then run in the main function Where C language program includes a display shows the temperature sensor to the temperature value and pyroelectric infrared smoke sensors perceive external abnormalities acquisition value delivery to the microcontroller then controlled by the microcontroller TC351 pass through remote monitoring terminal that household Detailed flowchart is shown in Figure 2 I 1 7 Cig 7 1 7 rece ca u ie r a a J a s of Liebe Lea A a T k I emperature alarm Gas leakage ae or W 1 a 4 ee i rot 1 Linh A Fy ae J i i J i ri E i PLUA A E i
145. equence length of three If a 000 is returned the microcontroller continues to detect otherwise wait If the I O signal sequence is maintained for a period of time and then becomes 000 meaning checksum is 123 The English Proceedings of the College of Instrumentation amp Electrical Engineering Jilin University in the Second Half of 2013 correct the I O signal sequence is valid otherwise invalid Finally the MCU identify the I O signal sequence content to determine the corresponding water level and control the GSM module to send alarm SMS After the sending of the alarm message the program continues to detect code circular Software process is shown in Figure 6 4 PROTOTYPE TEST AND ERROR ANALYSIS The fluctuation of the liquid surface will produce errors The liquid level is likely to produce a level change of Imm while measurement in order to enable the detection and alarm system to be stable and reduce the false alarm or alarm frequently the water level is divided into 6 level each level interval 3mm As the level increases reaching the corresponding level LCD screen will display the current level display 0 when there is no water at the same time GSM module will send an alarm SMS to the users phone 4 1 Laboratory Instrument Sink Homemade home flood alarm system caliper 4 2 The measurement of the accuracy and resolution 4 2 1 Measurement method Inject the liquid into the sink slowly stop the inject
146. er Education Press 2000 10 Ki Bong Kim et al Mutual Inductance of Noncoaxial Circular Coils with Constant Current Density J IEEE TRANSACTIONS ON MAGNETICS 1997 33 5 4303 4309 11 Theodoros Theodoulidis and Robert J Ditchburn Mutual Impedance of Cylindrical Coils at an Arbitrary Positionand Orientation Above a Planar Conductor J IEEE TRANSACTIONS ON MAGNETICS 2007 43 8 3368 3370 12 Slobodan I Babic and Cevdet Akyel Calculating Mutual Inductance Between Circular Coils With Inclined Axes in Air J IEEE TRANSACTIONS ON MAGNETICS 2008 44 7 1743 1750 13 Slobodan I Babic and Cevdet Akyel New Analytic Numerical Solutions for the Mutual Inductance of Two Coaxial Circular Coils With Rectangular Cross Section in Air J IEEE TRANSACTIONS ON MAGNETICS 2006 42 6 1661 1669 14 Slobodan Babic et al Salon New Procedures for Calculating the Mutual Inductance of the System Filamentary Circular Coil Massive Circular Solenoid J IEEE TRANSACTIONS ON MAGNETICS 2003 39 3 1131 1134 95 The English Proceedings of the College of Instrumentation amp Electrical Engineering Jilin University in the Second Half of 2013 15 Slobodan Babic et al Mutual Inductance Calculation Between Circular Filaments Arbitrarily Positioned in Space Alternative to Grover s Formula J IEEE TRANSACTIONS ON MAGNETICS 2010 46 9 3591 3600 16 L Hannakam and E Nolle Berlin Programm zur Bestimmung der Gegeninduktivitat raumlicher polygonar
147. er addressed References 1 Kang Zhigiang Wang Jia Tang Yongming FPGA based 3D Light Cube Design J Electronic devices 2012 12 6 2 Kuo Yuan Fen Semiconductor LED lighting industry and technology status A 2011 Green Lighting Technology Conference and Scientific Development and the Fourth Japan Korea Conference presentations lighting Proceedings C 2011 3 hook Huilan Liu Chao STM32 based minimum system and serial port communication J Industrial control computer 4 Mombo Yu STM32 Study Notes M Beijing Aeronautics and Beijing University of Astronautics Press 2012 5 Liu Bo Wen SUN Yan Embedded real time operating system wC OS II classic example Based on the STM32 processor M Beijing Beijing University of Aeronautics and Astronautics Press 2012 138 144 6 Dat Jun Jian ZHANG Chuan sheng STM32 based human computer interface design and implementation J Changchun University of Technology Natural Science Edition 2012 33 6 672 675 7 Wang Zhongkai Zhao Lei UC OS II task scheduling Shandong University of Technology Natural Science Edition 2009 23 2 30 35 8 Wang Xinzheng Cheng Xiaohui Zhou Huamao RTOS task scheduling strategy research and embedded applications 2007 23 4 2 57 5 design J operating system 87 The English Proceedings of the College of Instrumentation amp Electrical Engineering Jilin University in the Second Half of 2013 I
148. er dc ripple waveform By changing the voltage regulation part slide rheostat we make the output dc voltage value between 0 V to 3 3 V to meet the requirement of ADC12 built in the microprocessor MSP430 to input voltage amplitude of analog signal a Voltage regulating part AC voltage of input first step down the voltage regulator control and we can manually adjust the sliding rheostat to change the input voltage Figure 4 1s the voltage circuit of voltage transformer Figure 4 voltage circuit of voltage transformer b Rectifier circuit part Figure 5 rectifier circuit Figure 5 is the rectifier circuit Input voltage is V Output voltage is V R3 is Rg and R4 is Re Vp 1S output voltage of first UA741 Related formula such as 1 to 4 When Oe Vo 1 Y When Os Yq f1 EM 2 Ya 1 rake VG 3 When Rp 2R_ 2K 2R i 34 4 c Filter circuit part AORN ON ENE ETEO A E A T ES et ial C1 1E FA j i Ss hy 1i T it TET En F rh wt a 1 s 44 a a s TPT gare Et a f ita fou on t E N a a A beck TATA EEN ponies 4 MIET ae Al Figure 6 Filter circuit diagram Figure 6 is filter circuit diagram Second order active filter circuit is composed of two sections composed with RC filter circuit and amplifier Its characteristic is high input impedance low output impedance Proportion amplifier voltage gain is pass
149. erature humidity and light intensity detector The monitoring system is mainly composed of a low power consumption STC89C52 MCU DS18B20 temperature sensor HS1101 humidity sensors and a multi band radio frequency transceiver nRF905 The reliability of greenhouse test system is provided by a proper hardware design and a wireless data transmission mode which ensure that the equipment required to test the complex temperature humidity and light intensity environment Key words MCU NRF905 Temperature and humidity Light intensity PREFACE WITH the development of modern industries and agricultural technologies people have higher and higher demands for the precise temperature and humidity and measurement technologies of lightening strengths Traditional measurements of temperature and humidity data mainly adopt wire transmission system which need to set numerous leads and wires the installation and dismantle are both very complicated which is bad in flexibility and high in cost At the same time the signal transmitted on the line will be interrupted by the electromagnets and larger attenuations so as to cause measuring errors The paper designed nRF905 wireless greenhouse test and transmission system raises a solution for the deficiency of wire transmission system which adopts wireless radio frequency chip nRF905 and low power MCU making it possible to complete the data collection and wireless transmission with low cost and hig
150. ercome the traditional relief of low working efficiency large rescue equipment is not stable flexible and rescue fast easy to carry and adaptable to the environment thus the rescue robot research has important significance Intelligent rescue robot is designed and developed 66 based on the background of earthquake relief is a kind of can repair function mark accident sites to seek relief road of advanced equipment Highly intelligent 3 and automation is another big characteristics of this work is also one of the advantages of strong competitiveness At the same time adopt the advanced control system and algorithm universality and applicability of the system to further strengthen I to be able to complete various tasks 1 DESIGN OF THE SYSTEM Detection after a disaster rescue robot is a machine electricity light communication technologies such as integrated products remote monitoring system and the robot body of two parts can complete the life signals detection location and the implementation of the rescue mission Mainly by the visual system detection system wireless communication and computer control parts Overall system diagram as shown in figure 1 When rescue rescue workers through the leading Fig l Overall system schematic HU Rui fan etc Apost disaster Detection Rescue Robot System Design device of night vision camera units through remote control its freedom through 6 in the rubb
151. erface the data storage module schematic is shown in Figure 4 The display module uses TFTLCD ILI9320 produced by the Ilitek the operating voltage is 3 3V it has a resolution of 320 x 240 16 bit bidirectional data line the micro controller via the WR pin to write the data into the TFTLCD and read out data through the RD pin the schematic of the display module is shown in Figure 5 LCD CS Pp 2 LCD RS LCD WR 3 4 LCD RD LCD RST 5 6 DBI DB2 7 8 DB3 DB4 9 10 DBS DB6 ll 12 DB7 DBS 13 14 DBIO DBII 15 16 DBI2 DBIS 17 18 DBI4 DBIS 20 DBI6 DB17 22 GND BL Cl 24 a AES re ee 26 GND h a Ga GND 28 BL VDD T MISO 30 T MOSI T PEN 32 T CS 34 T CLK IFIFELCD Figure 4 Data storage module schematic Figure 3 MPU3050 schematic SD CARD 9 1 SDCS 2 SPI MOSI 3 VCC3 3 4 sd card Figure 5 Display module schematic 3 SOFTWARE DESIGN 3 1 Dead reckoning principle The motion of pedestrian can be considered as two dimensional motion in general 4 connection between the two foothold in a step cycle can be considered as a straight line When the data sampling time is a step cycle the information of pedestrian at the end of the current cycle can be calculated by the orientation information with the sampling period stride length and heading angle information sampled at end of the last sample cycle Showed in two dimensional xy coordinate plane let us suppose that the orientation of the pedestrian in initial time is x0 y0 t
152. ersity Press 2008 3 Huaguang Kang Electronic technology M Beijing Higher Education Press 2005 4 feng Bo Chen MAO Yan Hathong Li FPGA based direct digital frequency synthesizer design J Microcomputer Information 2006 22 2 189 190 5 Wu Rong Department YANG Yin tang ZHU Zhang Ming DDS with FPGA design J Aeronautical Computing Technology 2006 36 1 1 3 6 Xinghai Shi Dianren Chen etc FPGA based high speed DDS design and simulation J Changchun University of Technology Natural Science Edition 2009 32 1 85 88 7 Yong Yu Xiaolin Zheng Based on FPGA DDS sine wave signal generator design and implementation J electronic devices 2005 3 8 MAP H LIU P A design of AWG based on DDS using SOPC technique Z CEEE 2006 610 615 9 ZHAI Sheng wei LI Ying ying DU Bai sheng Implementation of a DDS signal source based on FPGA Electronic Design Engineering 2009 05 10 A L McEwan S Collins Efficient ROM less DDFS using non linear interpolation and non linear DAC J Analog Integrated Circuits and Signal Processing 2006 48 3 11 Xiangyang Sun etc DSP based transient electromagnetic receiver System J Changchun 136 University of Technology Natural Science Edition 2008 31 1 27 30 12 Shugin Sun Jun Lin Zhangbing Ren Jun Luo Pseudo random sequence generator Research and Implementation J Jilin University Information Science Edition 2004 22 3 1
153. essary to design a damping device that can make the sensitive device renew to the initial condition Now the most widely used damping devices are spring or liquid damping devices But the spring will produce a phenomenon called metal fatigue and damping liquid requires high and well leakproofness so we reckon that we can use the force between intermittent duty coil and magnet to produce the damping force This method can change the magnitude of force by changing the current so it has advantages in adjustment than the two methods before and it can deprive multifunction circuit to serve users But this method needs a power supply Consider that the device needs to be used long time in the outer environment We need to design a switch circuit that can switch on when the cantilever shakes and this process is automatic So it can get the goal of low consumption in order to make the coils work longer 2 THE STRUCTURE OF DAMPING DEVICE AND THE DESIGN OF CONTROL CIRCUIT 2 1 The basic structure of damping device The basic structure of damping device is showed in Figurel When the power supply provides the power for the closing coil it can be regarded as a electromagnet It makes the polar N face the polar N of the magnet And when the cantilever shakes the probe will send a signal to the detector and with the position of the magnet and the coil is changing the cantilever will receive a resistance and get back to the initial condition
154. evel At the same time the system stops the scanning If high potential signal is detected illustrating there is no laser spot The system continues scanning until the first high is detected After the water level signal is sent the program will restart the c scanning Loop detection is achieved Set data acquisition port and signal output port Initialize system and timer Display current level Figure 5 Signal Processing of The Software Design This program uses the 60ms timer interrupt the interrupt subroutine count 6s used for experiment it can be adjusted Whenever the interrupt is triggered the SMS counter is checked If the value is less than or equal to 2 program sent to the GSM module to send message and the message counter plus 1 Otherwise immediately disable interrupts The specific process is shown in Figure 5 3 2 SMS software design MCU control the GSM module through the serial port The procedures of this paragraph by the operating instructions of the GSM communication module AT command manual 13 query Initialize UART and LCD Initialize STM300 Y MCU send water level sequence Figure 6 SMS Sending Part of The Software Design First the LCD display module single chip control module and GSM SMS sending module is initialized After the successful launch of the GSM module system enters detecting water cycle Secondly GSM module extracted from the single chip serial I O signal s
155. f transistors to control the LED lights After testing the circuit when there is a high level in the base the output current is 1mA meeting the designed requirement Resistor R1 is 5K avoiding output power shortage and playing a role in limiting current 6 Li Na etc Design and Implementation of the full range of sub control intelligent lighting system 5V Ny D1 LED O R1 Q1 BC850B Fig 5 LED Lamp driver circuit 2 5 LED lamp module According to the core concept of the design that 1s reducing the waste of light to achieve the effect of environmental protection and saving money therefore in this design LED lights are arranged in an arc so that these lamps can provide light to the outside world in full range of 360 degrees LED lights above arc lamps are arrayed in five areas namely below east west south north Figure 6 is the full range of sub control intelligent lighting system schematic West Fig 6 b Outline structure Three dimensional visual 3 SOFTWARE DESIGN The main controller program flow chart is shown in Figure 7 The program of the main controller includes module initialization gathering lighting information response processing and so on The main task is to process digital signal from the sensor The first step is to choose the direction and then obtain information from the direction of the light if the light intensity in this direction exceeds ordinary lighting requirements
156. ficance for seismic data acquisition in shallow layer and wireless synchronization 19 The English Proceedings of the College of Instrumentation amp Electrical Engineering Jilin University in the Second Half of 2013 1 THE STRUCTURE OF THE OVERALL SYSTEM DESIGN The system consists of detector data synchronous transmission system and acquisition terminal of the wireless synchronous receiving and processing system of two parts the shallow layer seismic exploration seismic A D analog digital conversion AT89C351 Wireless The main data Strain type pressure instrument control system the hammer source signal 1s received by the detector data synchronous transmission system through the wireless transmission to the acquisition terminal of the wireless synchronous receiving and processing system start the seismograph began data acquisition The overall structure block diagram is shown in figure 1 Wireless AT amp 9C51 Acousto optic prompt data from the transducer controller transmission controller receiving unit power supply The LM11173 3 regulator circuit The LM11173 3 power supply module module Detector data synchronous transmission system regulator circuit The collection end wireless synchronous receiving and processing system Fig 1 The overall structure diagram Detector data wireless synchronous transmission system will hammer source signal through the st
157. follow up circuit of voltage This design adopts the basic including A741 as the main chip amplifier circuit Including A741 is simple to operate simple circuit structure and other advantages The design for the 12 v working voltage and power supply voltage of power supply We need to extern resistance through 2 pin and 3 pin to adjust its magnification D F N Packages TOP VIEW er ages Figure 3 A741 The circuit connection diagram n th R Ve R Us i _ Uy Us O R R R if then Kt 1 R lg V U R We can change the magnification and the resistance and the change of output voltage with changing and X Wang Di etc The Design and Implementation of Electromagnetic Radiation Detector 2 1 3 Analog to digital conversion module This design uses the analog to digital conversion built in the MSP430F149 realize AD conversion Its basic principle is to use a single module which is comparator to I O port perform one of the analog to digital DAC with the output of the comparator as feedback to maintain equal Vin conversions and Vout To maintain Vout Vin must through the I O port to charging and discharging of capacitance and determined to charge or discharge the output high and low level I O determined by the output of the comparator When the comparator output high electricity at ordinary times taken into account then Vout gt Vin deal with capacitor di
158. g can rate up from 25 to 30 Key words Lighting system Light intensity sensor Partition control Low power consumption Energy saving 0 PREFACE THE intelligence of traditional lighting systems is quite low with uncontinuous lighting control short longevity and low energy conversion efficiency besides in some public places such as classrooms the use of light is often in unattended or poor management situation which not only affects people s lives but also is a great waste of power This paper mainly introduces a design of a modular lighting system able to monitor external light intensity in full directions by each angle anytime and adjust its brightness automatically This system uses the sub regional controlled manner Each region can detect the light automatically and the intensity outside microcontroller control system processes the information then send signals to the controlling system which will adjust the number of lights and then adjust the brightness so as to meet general lighting requirements 1 This lighting system can not only meet the requirement of normal life and work light intensity but the system can automatically adjust its brightness to facilitate the monitoring and management of public places This system selects the LED as light source LED 1s called the fourth generation of green light source Its emitting device is cold light source with low energy consumption long longevity and other characteri
159. ging through RS232 and PC can stabilize the PC to receive instruction accurate control of X Y reverse Z axis stepper motor and a corresponding number of steps 6 CONCLUSION By using the graphical programming language Labview can realize the serial communication between PC and MCU controller combined with the L298 drive circuit 1s completed on the stepper motor steering and distance control can The experiment proves that the host computer program written in Labview with good communication simple high efficiency Join the optocoupler in the original driving circuit can shield the disturbance of good make the motor running stability Through field test combined with hardware circuit and PC good can control the moving states step stable motor References 1 Chenhong Chenxin Single Chip Pulse Generator Based On LabVIEW J Modern Electronic Technology 2008 03 2 Zhou Jianmin Hybrid Stepper Motor Driving Control System Design J Micro Computer Information 2008 04 3 Zhouhui Ma Huaixiang Design And Application Of Pressure Cooker Test System Based On LabVIEW Software J Light Industry Machinery 2007 05 4 Chenlong Zhang Xinzheng Dengchan Research On the Parallel Port Communication Control Of Step Motor J Electronic Test 2007 10 5 Xiangrong Shan Yuekang Zhangzhi Zhang Xiancheng Research On Automatic Zero cutting 6 7 8 9 NieYang etc XYZ three axis stepper motor control sys
160. gnals through the length of shielding line is connected to the two input channel of the signal oscilloscope before the line length layout is identical oscilloscope he two shielding in to the transmission time difference between the two signal 22 to oscilloscope ignored by the oscilloscope observation delay time signal waveformis thetime difference between the acquisition system System test connection diagram as shown in figure 6 The wireless To 0 ee Wireless data transmission gt ee seismometer receiving system radiodetector Two identical shielding line Oscilloscope Fig 6 System test connection diagram Overall test When the hammer peening source signals in the detectors sending digital hammer source signals and the buzzer sounds tips and receiving end ofthe indicating lamp is bright and the received signal to the seismic instrument The exploration of environmental uncertainty the same environment different transmission distance or different circumstances the same transmission distance transmission effect is not the same the precision of the synchronization time is not the same determined by exploration environment and wireless transceiver distance the design of data acquisition system of delay time is constant the seismic instrument we can make the corresponding compensation according to the delay time measurement so as to achieve t
161. gorithm for incremental mode Specific 56 functions are as follows typedef struct PID double SetPoint Setting goals double Proportion Constant proportion double Integral Constants of integration double Derivative Differential constant double LastError Error 1 double PrevError Error 2 double SumError Sums of Errors PID double PIDCalc PID pid double NextPiont t double dError Error rOUT Error pid gt SetPoint NextPiont Deviation pid gt SumError Error Integral dError pid gt LastError pid gt PrevError The current differential pid gt PrevError Error 1 pid gt LastError Error Error 1 Error rOUT pid gt Proportion Error pid gt Integral pid gt LastError Error 2 pid gt SumError pid gt Derivative dError Integral term Differential return rOUT j 3 CONCLUDING REMARKS Successful design one can automatically adjust the brightness correct posture reaching eye features for shadow effects loss reduction reach the purpose of the smart table lamp References 1 Zhou Jingle1 New type multi function control LED Table lamp J Electronic technologies 2011 5 2 Alec yan BP2808 LED Lighting power supply design techniques J China sintegrated circuit 2010 8 3 Liu Yingchun Sensor principles design and application National Defense University Press 1998 Zhang Zhou etc Intellig
162. h efficiency precisely test the greenhouse environmental parameters so as to ensure the suitable temperature humidity lightening environment inside the greenhouse 1 General structure and function introduction of the system The general structure frame figure of the system is shown in Figure 1 In order to implement the function requirement of wireless data transmission the system is divided into two parts of the lower machine system and upper machine system The lower machine system is placed in the collection field of temperature and humidity The field temperature collection is done by the numerical temperature sensor DS18B20 the humidity collection is done by humidity sensor HS1101 and the real time collection of lightening strength is done by TSL2561 Under the control of MCU STC89C52 the data of temperature and humidity is transmitted to the upper machine system by the emission port of wireless data transmission module nRF905 and liquid crystal screen to indicate the tested temperature and humidity values for the real time so as to implement the wireless data and display of the data The upper machine is usually placed in the control machine room and the information collected by the lower machine is acquired by the receiving port of nRF905 and indicate on the indicating control port of the upper machine for the real time When the actual greenhouse parameter is out of the set scope the alarm will be activated automatically
163. he orientation of an arbitrary time is xt yt within each sampling period walker steps is S heading angle is A then a step in accordance with the sampling period is T According to the principle of recursive the orientation of pedestrian at any time t may be expressed as Luo Yin etc Pedestrian Dead Reckoning Device Design Based on STM32 n t T X X S sin A i 0 Y X S s cos A i0 1 3 2 Heading angle calculation The pitch represented by 1 and the tilt angle represented by02 of the sensor module calculated by the Ax Ay Az measured by the three dimensional accelerometer can be expressed as 5 X A A A l aa 2 The Ax Ay Az in the formula 2 is acquired by the triaxial acceleration values corrected through least 0 arctan 0 arctan squares method 6 Since the sensor module is placed on the waist of pedestrian It is inevitably introduce vibration disturbance when the pedestrian is walking and result in pitch and tilt angle solving error a complementary filtering algorithm is used to integrate with the data produced by the gyroscope to reduce interference of solving error caused by vibration Let us suppose the three axis data of the gyroscope after performing filtering complementary algorithm as Gx Gy Gz and three direction acceleration data after fusion as Ax Ay Az The weight of three directions acceleration as PAx PAy PAz the three axis gyroscope data as PGx PGy
164. he article describes the hardware and software algorithms design of the pedestrian dead reckoning device based on the micro controller STM32F103RBT6 which completes the multi sensor data acquisition and dead reckoning The system and the micro controller can meet the applicable requirement which uses micro inertial devices of miniaturization practicality and portability and has the ease of setting up a system Field experiments prove that the measurement accuracy can meet the actual demand References 1 Lei Fang Panos J Antsaklis Montestruque Brett McMickell Design of a Wireless Assisted Pedestrian Dead Reckoning System The NavMote Experience J IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT 2005 12 2342 2355 2 Lauro Ojeda Johann Borenstein Non GPS Navigation with the Personal Dead Reckoning System R SPIE Defense and Security Conference Unmanned Systems Technology IX Orlando Florida April 9 13 2007 10 3 7 Sun Zuolei Mao Xuchu Zhang Xiangfen Tian Weifeng The pedestrian positioning parameter correction based on particle filtering and probabilistic neural network J The Journal of Shanghai Jiaotong University 2009 06 885 889 Song Min Shen Yanchun Indoor Positioning dead reckoning algorithm and _ implementation J Computer Engineering 2013 07 294 ST Corporation AN3182 Application Note OL http www st com internet com TECHNICALLIT ERATURE DATASHEET Doc ID 17289 13 ST Corporation AN3
165. he micro controller receives the datafromRS232 compared with its own temperature and then make the appropriate treatment 4 EXPERIMENTAL RESULTS DHT11 digital temperature and humidity sensor uses a single wire bidirectional serial interface technology a communication time is about 4ms the data sub fractional and integer part a complete data transfer is 40bit MSB first Ie 8bit Humidity Humidity decimal integer data 8 bit temperature data 8 bit decimal integer data 8bit temperature data 8bit checksum which is equal to the calibration data of 83 The English Proceedings of the College of Instrumentation amp Electrical Engineering Jilin University in the Second Half of 2013 four 8bit data and findings of the last eight For example read data as humidity 36 50 temperature of 22 80 C then the corresponding 40bit data 0010 0100 0011 0010 0001 0110 0101 0000 1011 1100 tested no increase in the transmitting and receiving antenna module case the wireless transmitting and receiving module in most cases the data transmission distance of about 200 m in the error rate is less than 3 the transmitter first transmit power receiver sensitivity receiver factors that may affect the transmission distance if separate antennas will greatly increase the transmission distance In addition the debugging process oscillation resistor must match otherwise the receiver can not receive even the distance becomes shorter 5 CO
166. he output signal is smoothed the spectrum is relatively pure 2 2 Multi frequency sine wave frequency synthesiz er Inside FPGA ROM Use the mode of register to output At the same rising edge of the reference clock different frequency signals corresponding to the different ROM insert different frequency amplitude Kang Pan etc The multi frequency signal generating technology for the shallow surface detection information to the output of the ROM and remains unchanged before the arrival of the next data The synthesis sine wave frequency requires the reference clock frequency in adder module less than the reference clock frequency of the ROM If referen ce clock of the adder module is greater than or equal to ROM reference clock it will output the value of different frequencies superimposed upon the ampli tude information at each rising edge of the reference clock adder module is not lost to the Figure 3 show s the dual stack diagram Sin Sir fo Jat fa Figure 3 Schematic sum frequency If the input reference clock frequency of the adder module is less than the reference clock of ROM the adder module reference clock rising edge in the ROM data within one clock maintained cycle was not able to come eventually leading to data loss Such as emission frequency resolution is 1Hz according to Af f 2 taking 28 accumulator bits then the frequency resolution is 100M 2 0 372Hz If using 28 of the ROM the RO
167. he purpose of shallow seismic exploration of wireless synchronization purposes Test in an open environment far transmission distance system reach 94m the transmission delay time is 1 87 u s 0 05s in a laboratory environment officers around and other electromagnetic wave interference far transmission distance of the system is 38m the delay time is 3 05 u s 0 067s complex field environment the distance of transmission up to a distance of about 24m the delay time is 2 65 u s 0 039s after determining the delay time under different environment system the seismic instrument according to delay time compensation so as to achieve synchronization The different environment The relationship between system time delay and transmission distance as shown in table 1 Pei Li ran etc Research on wireless synchronization device in superficial seismic exploration Table 1 The relationship between system time delay and transmission distance testing environment The test distance and delay time Measuring The wild complex Eey environment test Delay timelus time s 1690 90 Measuring distance m Delay time us 11 78 40 23 93 01 189 10 369 74 410 92 Members in the laboratory environment 1715 63 63 28400 39000 96 05 05 25378 78 walking and other Measuring electromagnetic pma interference Delyth time us pms 45 so 8140 31620 o Measuring pg jetties time s The open environment 24 17
168. hen people pass on the contrary it s output voltage is low flow chart of people counting module show as figure 5 Serial port init Sensor outpu high Number Check Number Figure 5 flow chart of people counting module 3 1 2 GPS module The key of using of GPS module is to formulate the communication protocol of Serial port it includes Xueyan hu etc Transit Passenger Flow Statistics System design data type and information format data type contains mainly Binary information and NMEA information these two types of information can correspond with GPS by serial port flow chart of GPS module show as figure 6 Close watchdog Timer init Serial port init Read minute Read second Read speed Figure 6 flow chart of GPS module 3 2 receiving portion The main task of receiving portion is showing the number of people and position information meanwhile to response the IRQ of receiving data flow chart of receiving portion show as figure 7 Close watchdog Timer init Serial port init Read data Show data Figure 7 flow chart of receiving portion 4 SYSTEM TESTING Testing on the outdoor data can be showed accurately on the LCD result of testing show as table l Number of people longitude speed km h in the car Table 1 result of testing 5 CONCLUSION Finally Transit Passenger Flow Statistics System is finished it can achieve display of number speed and position according
169. ify the results of calculation Keywords Polygon coil Mutual inductance Nie Yiman formula Rotation matrix MATLAB 0 INTRODUCTION AEM is one of the commonly used methods of geophysical exploration As a res ult of the position of the detection system in flight is variable and the mutual inducta nce value with the change of space position change so we need to study arbitrary spa tial location method for calculating the mutual inductance coil In the domestic and ab road for the calculation of mutual inductance coil has related research The domestic g eneral literature is more about coaxial parallel round coil and square coil in the studyof the mutual inductance coil 1 4 But for the tilt coil and arbitrary position of the coil research less Inforeign related literature calculating the mutual inductance of inclined round coil and round coil with the thickness and solenoid 10 15 The literaturel6 propo sed a method to calculate the mutual inductance of polygon but the method will get the complex expression and have large amount of calculation This paper obtains from the Nie Yiman formula combined with the parameters of the linear equation and rotation matrix deducing the general expression of mutual inductance of polygon coil atarbi trary place using software MATLAB to program and calculate and verify the accuracy of the calculation results 1 THE EXPRESSION OF MUTUAL INDUCTANCE OF POLYGON COIL 92 Two polygons coils the primary co
170. igent lighting requirements Moreover compared with the traditional lighting system the intelligent lighting system has five partitions they are east west south north and below each of the LED lights array is equipped with a measuring circuit composed of light intensity sensors five partitions are independent realizing the purpose of sub regional management After actual test regional recognition rates up to 100 settling time is less than 2 0s light intensity resolution is less than 1 0lx Compared with ordinary lighting system the intelligent lighting system saves about 25 30 of electricity in the same condition In addition the intelligent lighting system can achieve good energy saving effect extending lamp longevity All the advantages guarantee the intelligent lighting control system a promising market prospect References 1 Wang Wensheng Intelligent lighting control and energy saving J intelligent building and city information 2005 2 Wang Xiyuan LED intelligent lighting control system Automation of manufacturing industry 2012 33 12 128 131 3 Wang Chunmin Liu Xingming Ji Yan Ju Continuous and discrete control system Jilin University press 2008 4 6 4 Yang Ping Wang Wei MSP430 series ultra low power microcontroller J foreign electronic measurement technology 2008 5 Yun zhonghua Bai tianrui indoor illumination based on intensity measuring instrument BH1750FVI J microcontr
171. il is located in the origin of coordinate the se condary coil in any position of space number of edges are K and K3 As shown in figure 1 Fig 1 Mutual inductance can be calculated by the Nie Yiman formula 9 wag g Sate o 4m 14 2 R Because of the polygon coil consists of line segments it can calculate the mutual inductance between each edge and then sum can get the mutual inductance of the two polygon coils Suppose the coordinate on the primary coil is X y 0 the coordinate on the secondary coil is X2 y2 z2 expanding dl dly dl dl gt dx dy1 0 dx2 dy2 dz2 dx dx2 dy dy2 2 substitute into 1 we have M o f 12 f z 1 Gig f z zz Lay2 G dm an ar r 2s 1 tay By Poy of x 91 Go y 22 In the espression 3 regardless of is to the variable x LiuYang etc The calculation of mutual inductance of two polygons with multiturn coils at arbitrarily position to the y integral can involve to other variables makes the integral the computation to be complex Therefore needing to eliminate other variables transforms for includes two variable integrals Regarding the spatial straight line supposes Mo ao bo co in the straight line M x y z is in the straight line random point y m n p for the straight line direction vector then vector MM with 5 parallel therefore the straight line parametric equation may write as m n a In the espression 4 t is a p
172. ilt on the relay and voltage to determine If the voltage back to normal relays keep closed circuit work if voltage the relay disconnects again and repeat the action After delay time that is built on the second and voltage to determine If the voltage back to normal relays keep closed circuit works unjustifiable pressure disconnect the relay and control as a standby power supply relay closed forego the standby power supply Relay control flow chart as shown in Figure 11 2 2 2 Computer programming Visual Studio is a software development environment which Microsoft has launched it can not only create a Windows Forms application under the platform the WinForm and network applications also be used to create Web services and Office plug in Visual c is an important component part of the Microsoft net Framework WinForm is an appellation to Windows Form in Net development platform In this design PC interface use Visual Studio 2005 to design and code According to the requirement of design add six button controls Start Change voltage thresholds Modify the delay time Quit Switch off and Switch on Design three main textbox Measure the voltage value Change voltage thresholds and Modify the delay time Valid values for the measured voltage display current voltage in power grid The single chip send the voltage value to the computer byRS232 chip voltage thresholds and the delay time is set by PC operator and sent byRS232 chip to c
173. imit value will alarm which means that 128 the power density measured value is out of limit value 3 HARDWARE DESIGN 3 1 Three component coil Tester commonly used is directional or antenna to measure radiation but the majority is directional is directional and the electric field probes are expensive In the simulations we can see that Magnetic field is not a single direction of the magnetic field the measured values using the conventional probe vary greatly Therefore the three component coil measuring instrument measurement avoids the problem of directionality and no matter how the winding direction it can measure the exact value As previously measured electromagnetic signal is weak you need to use the amplifier to amplify the signal before processing Before amplification the signal go through a capacitor that serves to filter out the DC and preliminary filtering The waveform Collected from the oscilloscope can be seen that the collected is high frequency and a small amplitude signals Via a plurality of elements to be adopted after relatively wide bandwidth the smaller offset current as a main amplifier OP37 parts the signal amplification Meanwhile since the bandwidth of the reasons OP37 itself two amplified also plays a filtered high frequency harmonics Enlarged part of the circuit as shown in 3 Figure 3 amplifier module circuit 3 3 Analog digital conversion ADC0808 is sampled 8 bit resolution which the
174. int sbit adwr P3 6 sbit adrd P3 7 uchar code table 0x03 0x9f 0x25 0x0d 0x99 0x49 0x41 0x1f 0x01 0x09 void display uchar bai uchar shi uchar ge P2 0X20 PO table ba1 DelayM 5 P2 0 P2 0X40 PO table shi DelayM 5 P2 0 P2 0X80 PO table ge DelayM S P2 0 j main unsigned int aa bb while 1 aa adc0804 bb aa 114 display bb 100 bb 100 10 bb 100 10 j j After several times of adjustments and improvements finally get the target 0 5V voltage on the coil is showed in numbers range 0 from 255 4 Design of 555 delay circuit 555 circuit is a widely used integrated circuit Because it has high sensitivity we need to take some action to protect it from being disturbed take the circuit showed in Figure7 as the final circuit The circuit is based on 555 and add switch made by transistor and a self lock circuit Figurel1 555 delay circuit Analysis about the working process of the circuit The circuit consists of a 555 pulse launched model its output connects a control relay The process is when it outputs a high level the relay is absorbed When it outputs a low level the relay is released Pin2 is the trigger pin It is triggered by low level Usually the 555 circuit is triggered by pin2 and it is launched by a resistor R4 Pin3 outputs a low level the delay is released When the switch is touched the power supply provides the power by R1 to the base of SCR
175. intensity signal collected requires feedback regulation so we choose closed loop control system 3 System structure is shown in Figure Detection trolled trolled controller Actuator Sen a gt oe value object parameter Detection ke device Fig 2 System Control Structures 2 2 The main controlling module This system uses STC89C51RC microcontroller as the controller STC89C51RC belongs to a class of 16 buses with FLASH microcontroller It uses a 16 bit bus peripherals and memory unified addressing whose addressing ranges up to 64K with the external expanded memory available With a unified interrupt management it has a wealth of on chip peripheral modules As for the FLASH based online debugging and downloading is available Because the JTAG port and FET FLASH EMULATION TOOL are connected directly no additional simulation tools are needed it can work in low power mode 4 which is convenient and practical to use The main controlling system circuit consists of light intensity sensor LED driver modules and power supplies system Hardware circuit diagram is shown in Figure 3 Controllers are connected to measuring circuits with light intensity sensors in five directions namely east west south north and below The array of LED lights in each partition is controlled individually by the fixed light intensity sensors Through external expansion the
176. ion J Chinese geophysics 2011 16 519 7 Zhang Lin hang Study on Data Transmission Techniques Based on Relay Ethernet in Seismic Exploration using Vibroseis D Changchun Jilin University 2007 8 Lu Hui Shen Qing hong Chen Ce et al Wireless Transmission of WSN Bridge Health Monitoring System Based on Imote2 J Now electronic technology 2010 21 30 34 9 Li Su yi Zhang Hong Jing Lu Xia et al Wireless Dynamic ECG Monitoring System Based on ZigBee Technology J Journal of Jilin university information science edition 2012 30 5 451 455 Discussion on 10 Xu Bin Bi Guang guo ultra wideband pulse wireless transmission technology N Computer World 2004 10 11 B06 11 Tang Lan Wang Shu xun Sun Xiao ying et al Ultra broadband wireless transmission technology J Journal of Jilin University Engineering and Technology Edition 2004 34 2 33 1 334 12 Yang Lei The The Research of the FPGA Based Data Collection system of Respirator D Changchun Jilin University 2006 13 Wang Shun Gu Ye dan MCU application design of wireless network based on nRF24L01 J Journal of instruments and meters 2010 31 8 55 to 57 24 14 Wei Ji hui Design and Implementation of Wireless Network Based on nRF24L01 D Jilin Jilin University 2012 15 Wang Sheng yuan Zhang Hong wu zhao kai et al Design and Realization of Wireless Transceiver Module in Communication of Many Machines J Journa
177. ion base station electromagnetic environment effects J Mobile communications 2005 8 92 93 6 Xu Guizhi Fei Fei ZHANG Hui fen etc a 12 bit dual channel high speed data acquisition and processing system J Electronic technology 2002 5 78 80 7 Cengfan Jie Bi Chao Li Tong Microcontroller and dual port RAM data acquisition system consisting of J Data processing 1992 7 1 62 67 acquisition and 130 8 Zhu Hao based PC 104 and dual port RAM high speed data acquisition system J Hydropower plant automation 2008 29 4 20 23 9 Bao yuan Yang Baoging Sensor and Its Application Manual M Beijing Mechanical Industry Press 2004 227 256 10 Lu EMI measuring instrument selection and use of J Testing and Measurement 2007 2 42 44 11 Sand possession Integrated intelligent sensor principle and application M Beijing Electronic Industry Press 2004 1 222 226 12 Wei Xiaolong MSP430 MCU interface technology and system design examples M Beijing Beijing University of Aeronautics and Astronautics Press 2004 13 Guo Jiayu Ni metaplasia Kong Deyi and other three dimensional orientation of the magnetic sensor circuit design J Instrumentation Technology 2008 9 65 68 14 peak sheets together Microcontroller based three dimensional magnetic detection system design J Electronic Measurement Technology 2008 9 181 184 15 Zhao Bo Zhang Hongliang et al Ansoft
178. ion while the LCD screen displays the level variation the current level is measured with a caliper and recorded Continue to inject water until it reaches level 6 Through this method measurement data as shown in Table 1 error analysis 10 groups of are shown in Table 2 which Ah is the difference between the measured value and the actual value of the unit mm Table 1 Measurement data table actual value measured value Ah actual value measured value Ah actual value measured value Ah 1 00 1 00 0 00 4 00 4 00 0 00 7 00 6 80 0 20 1 00 1 20 0 20 4 00 4 20 0 20 7 00 7 10 0 10 1 00 1 20 0 20 4 00 4 10 0 10 7 00 7 10 0 10 1 00 1 10 0 10 4 00 4 20 0 20 7 00 6 90 0 10 1 00 1 10 0 10 4 00 4 20 0 20 7 00 7 00 0 00 1 00 1 20 0 20 4 00 3 80 0 20 7 00 7 10 0 10 1 00 1 00 0 00 4 00 4 00 0 00 7 00 7 10 0 10 1 00 1 10 0 10 4 00 4 10 0 10 7 00 7 10 0 10 1 00 1 10 0 10 4 00 3 20 0 80 7 00 1 90 0 90 1 00 1 20 0 20 4 00 4 90 0 10 7 00 6 90 0 10 10 00 9 80 0 20 13 00 12 70 0 30 16 00 15 90 0 10 10 00 10 00 0 00 13 00 12 60 0 40 16 00 15 80 0 20 10 00 9 20 0 80 13 00 12 20 0 80 16 00 16 20 0 20 10 00 9 70 0 30 13 00 12 80 0 20 16 00 15 50 0 50 10 00 9 70 0 30 13 00 12 90 0 10 16 00 15 80 0 20 10 00 9 80 0 20 13 00 12 90 0 10 16 00 15 90 0 10 10 00 10 20 0 20 13 00 13 40 0 40 16 00 16 20 0 20 10 00 9 80 0 20 13 00 13 20 0 20 16 00 16 40 0 40 10 00 10 20 0 20 13 00 13 20 0 20 16 00 16 00 0 00 10 00 9 70 0 30 13 00 13 00 0 00 16 00 15
179. ir of balance force and they are also of the same value and reverse IG F 8 According to Newton s second law the acceleration of the object is directly proportional to the force of the object and is inversely proportional to the quality of the a7 The English Proceedings of the College of Instrumentation amp Electrical Engineering Jilin University in the Second Half of 2013 object and the direction of the acceleration and direction closing an outside force the same 9 We can get 9 Analys nonmagnetic iron ball when the system 1s balanced combining Newton s second law F G F 0 1 G mg F F 11 In the fomula Fr is the resultant force on nonmagnetic iron ball when the system is balanced m mass So the iron ball s stands for nonmagnetic gravitational acceleration F F HE Fy B Fy H 12 2 1 Hardware Design Feeling part of this device is designed for regular hexahedron installation of a piezoresistive sensor on each side to feel regular hexahedron respectively the thus acquisition channel Then generate electrical signals s x data by force electricity transformation through the Wheatstone surface stress distribution forming Bridge then amplifier electrical signals and filter circuit and other noise through differential amplifier and filter circuit to get ideal voltage Then get the corresponding digital quantity by the A D conversion module from voltage a
180. ity of the vibrator C is a constant represents the magnitude of damping The unit is N m These relationships is similar to the Ohm s law It is easy to see some examples of damping in our daily life For example use your hand to touch the chord then the sound will fade out The tree will stop shaking after the wind A damping phenomenon is one of the most common things An ideal spring damping device is showed in Figurel7 Forces we want are elastic force k is stiffness factor X is the displacement Fs kx 3 2 Damping force C is damping factor v is the velocity of the vibrator dx C dt 3 3 Imagine the vibrator does not suffer from any force fy cv ce outside then write the oscillation equation with the help of Newton s Second Law dx gt F ma mt m dt 3 4 A is accelerated speed In this project we use the induced voltage to produce the force to achieve the damping phenomenon But the information searched before is mainly about viscous damping They are not useful So it is necessary to calculate again to build a new way to solve our problem In viscous damping model the relation is F VWV But in our own model the result is showed in Figure16 There are two ways to build the model Scheme I Use the curving fitting to draw a Gaussian distribution curve Suppose the relationship between F and x is A pn x BY F Ae 3 5 A and B are constants The advan
181. l eae ean moves along the Y axis the range is 0 10m and the Lx LyLz m KoB valie VOEE equivalent curve of mutual inductance as shown in figure 2 nH 0 0 0 an 29 Ts 28 step is 0 l1m use the MATLAB to draw the changing nH Mutual Inductance H 0 1 2 3 4 5 6 7 8 9 10 Horizontal distance m 4 8 15 0 30 0 4 16021 4 16522 Fig 2 According to the comparison result shows that the The figure 2 shows that when the horizontal calculated value of using area of equivalent and the 94 LiuYang etc The calculation of mutual inductance of two polygons with multiturn coils at arbitrarily position calculated results of using the method in this paper is approximate the error is little it indicates the calculation method in this paper is correct 4 CONCLUSION This paper embarks from the Nie Yiman formula the union space straight line parametric equation and the revolving matrix infer the computation polygon coil mutual inductance the expression this method easy to understand so long as gives the coil various apexes the coordinates the location parameter and the degrees rotation then calculates and has carried on the analysis to the computed result Using MATLAB software to program to calculate solving the complex computation process when the size of the coil and position are changed only need to change the related parameters in the
182. l of Jilin university science edition 2006 44 3 470 472 Shi Zhaomin etc The Research of Sphere Lifting Height Automatic Control System Based on Air Pressure Control The Research of Sphere Lifting Height Automatic Control System Based on Air Pressure Control Qian Chenghui Shi Zhaomin Kang Lili Li Qi College of Instrumentation amp Electrical Engineering Jilin University Changchun 130022 China Abstract For precise control of sphere lifting height in the pipeline this paper puts forward to a better way to regulate sphere lifting height based on the control of pressure automatic regulating s principle MCU changes the rotation moving angle of the stepper motor to manage the pipeline pressure change The test result shows that the system can set lifting height residence time the order of spherical movement send control information via wireless communication and display spherical height and error information continuously The relative error is 1 45 With the movements of sphere it reflects the status of the pipeline s pressure This system has good application prospect in the physics experimental teaching Key words Air pressure valve Sphere lifting height control Experimental teaching 0 INTRODUCTION AT present with the development of electronic products and electronic technology physics teaching demonstrates related physical phenomena to students through related animation to help them understand and lea
183. le When finding survivors rescue workers survivors can be observed through the night vision camera also can through to the phone conversation with survivors detailed understanding of the survivors of the situation And can be calm and psychological counseling for survivors through dialogue According to the observed and the immediately location of survivors rescue work 2 THE DESIGN OF ROBOT HARDWARE M motion Robot body with perfect sensor system ability of communication and reliable actuators The system control algorithm the real time composition block diagram is shown in figure 2 HH yA ey E a ER TEI EMRE FEAL YK 2H FB RAS fas rae EPEMCU t MERRIER AS gt STC12C5A60S2 ol WEEL if ANAL DEAE IR an m CIEPLE TRPI Fig 2 Robotics system block diagram First by adding the infrared induction equipment and detection radar and other equipment to perform the earthquake stricken area on a wide range of search and rescue mission The center of the robot carrying platform adopts modular design can according to actual needs timely replacement of equipment for search and rescue work Optimizing circuit at the same time isolation filter 81 to prevent interference between each sensor increase the reliability and sensitivity of signals As shown in figure 3 is the pyroelectric sensor filtering amplifying ci
184. le wireless charger design lA AD73311 universal analog front end principle and P 3 7x2x0 4 3 0w its application in speech processing J Electronic technology 1999 8 53 55 P ameh 12X1 12w P 3 0 n x100 25 P aiih 2 Form 1 The actual charge Phone Charge into the Time min Distance O Small 30 of Small 40 mox m o BEN 3 CONCLUSIONS 30 30 30 This design enables the transmission distance of 5 10cm it is suitable for most mobile phones interface a wireless charging and it solves the issue that wired charging port is not compatible inconvenient to carry System hardware and software are modular in design so easy to debug and troubleshooting But charging a bit low the transmission distance is shorter if in depth study by increasing the supply voltage to 24V or increasing radius of the coil If PWM can be produced by separate chips which can reduce the burden on the microcontroller and can improve the circuit output accuracy References 1 Xiao Zhijian Han Zhenyu Li Shaozhuo about the new wireless charging portable electronic device system research J Automation and Applications 2007 12 114 116 2 Digital Voice Systems Inc AMBE1000 Vocoder ChipUsers Manual Version 4 1 M 2004 04 3 Zhou Ligong Zhang Easy ARM7 M Beijing Aerospace University Press 2005 52 53 70 90 4 Zhang Xin Yi Luton Lu Zhang Youwei The English Proceedings of the College of Instrumentatio
185. ll the sets above we can get the relationship between the stress and the Z coordinate of 116 the magnet Look at Figure15 and Figure16 The stress is showed in y axis the unit is N The Z coordinate is showed in x axis the unit is mm Set the unit of account to be 0 5 showed in Figurel5 When make it to be 0 lmm showed in Figure16 There is some disturbance because there is a induced voltage It 1s necessary to get rid of them Some data is showed in List2 aerials xY Plot 2 ee x F 1 id oe be oe iad aa ot Figure15 The relationship between the stress and the Z coordinate of the magnet XY Piata rok Figure16 The relationship between the damping force and the Z coordinate List2 Information of Z coordinate and the damping force LOIL CEL PUree NAg Like Ww LILLJ height solutionl LastAdaptive 30 000000 1 191449 El 30 500000 0 414TTE na 31 000000 0 179909 31 500000 0 440655 H 32 000000 0 495516 El 32 500000 0 533751 H 33 000000 1 529073 e 33 500000 0 133614 Bi 34 000000 0 294756 o 34 500000 0 152370 Ej 35 000000 0 399476 E 35 500000 0 220396 E 36 000000 0 216344 It can be easily seen from the data that the maximum of the damping force is when the bottom of the magnet meets the top of the coil That is to say when z 33mm F comes to the maximum 1 52907N When Z is not more than 33mm the magnet goes into Jiang Ransong etc The manufacture and si
186. lly change the output clock pulse interval increases the speed of the pulse string encryption gradually deceleration the pulse train gradually sparse MCU timer interrupt to control the motor speed is actually changing the timer loading value can control the motor speed Example void Delay uchar I i Uchar x J For j 0 j lt i j For x 0 x lt 148 x j In the control of acceleration and deceleration we can put in a external interrupt such as the original initial value of I is 5 in order to slow down when there is an external interrupt command 1 i 2 is the delay time of growth pulse time interval becomes wider than before If you need to accelerate the pulse time interval narrowing o 4 2 The 2 2 3 program flow chart Wait for the computer input MCU receives the input data processing Send the command and Data feedbacks ata peek back Figure 7 program flow chart Through the PC interface on the X Y Z three axis choice the choice of MCU output input step instruction through the provisions of step angle screw and stepper motor stepper motor can be calculated by rotation of the distance through the single chip stepper motor corresponding to certain pulse number 60 Every time after the execution of a data feedback 5 EXPERIMENT RESULT ANALYSIS Procedures for the use of C language using Protues simulation software keil compiled downloaded to a single chip connection debug
187. ltage sensitivity s7 0 01 45V The resulting system local error 39 The English Proceedings of the College of Instrumentation amp Electrical Engineering Jilin University in the Second Half of 2013 e7 2 44 10 8m s 2 19 3 Error caused by environment temperature change Due to the different material of parts in the module of devices which has intrinsic to the thermal expansion coefficient of various materials When system is working the environment temperature changes will produce relative displacement between components local error caused by temperature Device s using request the environment temperature change At lt 2 CT the temperature error of local error caused by the system e8 1 24 10 5m s 2 20 According to the uncertain system error formula the total system error synthesis 8 8 Ae gt e I Y e 2 31 10 m s 21 3 2 2 Random error analysis 1 Random error caused by angle between surface and surface r F F 2FF cos0 F F G The resulting random local error A 1 1 64 10 3m s 2 23 2 Measurement error caused by nonmagnetic iron r 0 01g ball s mass When nonmagnetic iron ball s mass g gt 10g the resulting random local error A 2 max 9 78 10 4m s 2 24 Total synthesis of random error based on the principles of action 2 3 2 Ay A 1 91 10 m s ml 25 In conclusion the overall error 8 e e A 2 31 1 91 10 m s i l 26 Gra
188. lti frequency Signal Generating Technology for the Shallow Surface Detection cccccccccccceeeeeeeseeeeeeens PAE EER EAA tea a PE AT Liu Chang sheng Kang Pan Xia Zheng yang Zheng Wei 131 Fuzzy control based on ultrasonic ranging parking system model design ccccceeeeesesseesessssesseessssssessssssssssesseseaaas PREE E E A AORE OR E EAEE es QIAN Cheng hui FU yu jing MIAO Hong song KANG ning 137 II Ding Xiaoxu etc Microcontroller based mobile wireless charger design Microcontroller based mobile wireless charger design Ding X1aoxu Guo Baitfu Like Jilin University of Instrument Science and Electrical Engineering Changchun 130012 Abstract In order to adapt to the wireless charging of implantable medical devices sensors municipal transportation and other aspects of the application Change the current electronic charging interface incompatibilities The design uses a low power microcontroller STC12C5A60S2 energy transfer charger as a wireless monitoring and control core based on the principle of electromagnetic induction through energy coupling coil to achieve energy transfer the current control voltage control achieve transmission distance 5cm the voltage reaches 5V 0 5A current steady power supply after the prompt is given full power and full automatically stop charging Charging voltage and charging current display with low power LCD1602 System has a wireless charging energy transfer effe
189. m shown in Figure 1 81 The English Proceedings of the College of Instrumentation amp Electrical Engineering Jilin University in the Second Half of 2013 YCC 10 Nc P 103 GND TE4T gt YCC i F C6 Nc THe STE T gt p m 15 12 5 p Eei 31 1 zZ 3 5 amp z s z e SUSPSTIOM m BATI TET Figure 1 Temperature and humidity acquisition circuit design 2 2Wirelesstransmitter and receiver module design In the wireless transmitter and receiver module nRF24L01 as a design we use the core components NORDIC nRF24L01 is produced by a wireless communications using FSK modulation internal integration NORDIC own Enhanced Short chips Burst protocol Can be achieved or one pair of six point wireless communication Wireless communication speed can reach 2 Mb s NORDIC wireless transmitter and receiver chip nRF24L01 circuit diagram shown in Figure 3 Figure 2 receiver transmitter module nrf24101 circuit schematics nRF24L01 is a single chip RF transceiver chip working in 2 4 2 5 GHz ISM band the chip built in frequency synthesizer a power amplifier a crystal oscillator and a modulator function module the output power and communication channels can be carried out by the program configuration nRF24L01 chip power consumption is very low in order to 5 dBm launch power operating current of only 10 5 mA working 82 current receiving only 18 mA it has a variety of low power operating modes
190. magnet will change the position with the coil behind it then the induced voltage arises We can regard the left coil as a power supply when the shaking signal comes The induced voltage will be amplified and then it can provide power for the right coil The diode is a rectification device The current goes across the diode then the right coil the right coil can be regarded as a electric magnet it can work as a damping device to the magnet above There is a alterable resistor in the circuit It can change the voltage that adds to the coil so that the coil can have different magnitude of magnetism After several times of tests the number of turns is 70 The resistance of the two coils is 1 8 ohm each It is because the strength of the magnetism is related to the magnitude of the current so the resistance needs to shut down to let the damping phenomenon more obvious When the right coil shakes the initial number of the voltmeter is about 1 0 maybe the 741 amplifier needs a drifting voltage When the cantilever shakes the number on the voltmeter begins to change regularly the maximum can reach to 4 5 or so This will meet the requirement to produce enough magnetism This image uses a thought of equivalent of power supply The circuit makes the left coil and the amplifier a power supply to provide power to the right coil Use the conclusion that the conductive coil is an electromagnet It can meet the demand of low consumption Now le
191. mation of the card 5 The principle of the card reader is shown in Figure 3 ZX amp U Serial Interface Infrared sensor on the tube gt Wireless Swipe District Le Pansmission lt Blackboard Fig 3 Reader working schematic 2 HARDWARE DESIGN System hardware consists of Data Measurement Module Data Transmission Module and PC Processing Module System hardware schematic diagram is shown in Figure 4 SS SS j oe frm ON _ ia U VANN U Z l f i AN ry 1 4 cl aan HI gi Magnetic gt gt gt _ Lyi field aa JID bee lone ey a ae Electronic tags Reader Fig 4 System hardware diagram 2 1 Data Measurement Module The Data Measurement Module consists of Beam infrared sensor FM1702SL card reader Buzzer circuit and Display module Data Measurement Module get the information of students name number and status 2 1 1 Beam Infrared Sensor The two pairs of beam infrared sensor of this module are placed one after the other like shown in Figure 4 The timing of the two pairs of beam infrared sensor s output signal is shown in Figure 5 When no students passed the output signal remains high When a student is passed the sensor will be covered and output a falling edge signal 6 We can judge the status whether the student is out of the classroom according to the chronological order of the falling e
192. motely monitor and control for real time Therefore how to design a reclosing equipment which is simple effective and has high successful rate Currently the secondary reclosing microcomputer device remotely and interactively controlled by PC is still in the early research Microcomputer based reclosing device has high reliability high precision high speed and intelligent communication quick and convenience simple structure and other advantages We just has a certain control settings they can pose a variety of ways When the auto reclosing coincides on a permanent failure many times the system is suffered several attacks and it results in serious consequences So safety and success rate shows that reclosing II is the most appropriate In recent years a reclosing device had been widely applied in Guangzhou area It is a technology which makes use of composition of feeder circuit breaker device in power distribution system and on post switch in action to make sure fault location and isolation and rapidly restore power supply But it failed to realize the remote display and control In order to achieve a simple effective and high successful rate of reclosing device This paper designs a secondary reclosing microcomputer device remotely and interactively controlled by PC The device selects 97 The English Proceedings of the College of Instrumentation amp Electrical Engineering Jilin University in the Second Half of 2013 MSP430F1
193. mputer interaction and signal generating which is shown in Figure 1 HCI low power microcontroller MSP430F149 as the master chip moreover it has plug in keyboard and LCD Master module uses TI s chip controls keypad and LCD and uses the received information to make the appropriate mathematical processing to communicate with the FPGA At the same time LCD displays the user s required information in real time FPGA receives information from single chip and makes logical processing and it sets signal discrete value information through I O port output from the external high speed DA discrete values of the received information into an analog signal and then it outputs through the filter amplifier signal conditioning modules 131 The English Proceedings of the College of Instrumentation amp Electrical Engineering Jilin University in the Second Half of 2013 Human FPGA MSP430F 1 Keyboard Interaction EP1C3T144 The filter Figure 1 Overall system diagram 2 THE PRINCIPLES AND PARAMETERS OF MULTI FREQUENCY SINE WAVE SYNTHESIZER DESIGN Frequency The phase control accumulator M bits n bits phase amplitude Sine lookup table 2 1 Sine wave generation Generating sine wave shown in Figure 2 The system clock Low pass The output signal filter Figure2 Block diagram of sine wave generation single frequency After FPGA receiving input information to the mic
194. mulation for electromagnetical damping of fiber detector the coil and the stress gets smaller When Z is more than 33mm the magnet leaves the coil farther and farther the damping force gets weaker and weaker It agrees with what we learned The error of the simulation is in the allowed band 3 3 Analysis to the result of the simulation In the physics and engineering science the mechanical model of a damping force is in direct proportion to the velocity of shaking and it is a force that has inverse force with the direction of the shaking The model is called stickiness damping model It is the most widely used model It can simulate the damping function of air water or other liquid well Now mainly discuss the model of stickiness damping device It is necessary to point out that there are many damping machine made that still not exit in nature such as a shaking spring on a desk that has a constant friction factor The stress is related to its weight and the friction factor but not the speed Besides the simply shaking damping force electromagnetic damping media damping structure damping are also concrete forms scientific of damping Although now community has put forward many kinds of mathematical models for damping it is hard to choose the model when we come back to reality So let s explain it in details Viscous damping can be expressed as the following formula F cv 3 1 F stands for the damping force V is the veloc
195. n amp Electrical Engineering Jilin University in the Second Half of 2013 Pedestrian Dead Reckoning Device Design Based on STM32 Luo Yin Lu Hongzhou Zhao Yu Wang Jun College of Instrumentation and Electrical Engineering JiLin University Changchun 130012 China Abstract We put forward a new design of pedestrian dead reckoning device based on the portability and practicality The device uses LSM303DLHC integrated with a three dimensional accelerometer and an electronic compass and MPU3050 integrated with a gyroscope to collect the real time movement information of pedestrian The Cortex M3 core STM32F103RBT6 in the device collects data produced by the sensors performs pedestrian dead reckoning and displays the dead reckoning information of pedestrian on a TFTLCD Experiments prove that the device has the high precision of dead reckoning and satisfies the requirement of practical application Key words STM32F103RBT6 multi sensor heading step count track display INTRODUCTION IN the wild woodlands rocky areas or the urban region located with skyscrapers the positioning accuracy of global satellite positioning navigation system GPRS will descend because of the signal block it even can t finish positioning in some circumstances Therefore in recent years self contained positioning scheme based on movement characteristics for pedestrians has become a research hot spot Most of the adopted solutions use wearable multi sensor to
196. n results from the national sleep foundation sleep in America 2005 poll Chest J 2006 130 3 780 786 5 S5 Sun Hong jie Tang Yi ping Yuan Ying Research on intelligent sleep pillow J Journal of zhejiang university of technology 2010 38 3 294 298 6 MitcheLI S L Morris J N Park P S etal Terminal care for persons with advaneed dementia in the nursing home and home care settings J Journal of Palliative Medicine 2004 7 6 808 816 7 WANG Shuang lin CHEN Zhen cheng A Family Measuring System of Sleep Based Oil VC 6 O J Chinese Journal of Medical Physics 2010 27 4 2047 2050 8 HAO Lian wang SONG Tao Study on the Detection Technologyof the Respiratory Signal J Micronanoelsctre Fechnology July Aug ust 2007 9 Hu Handong Chen Hongbo Chen Zhencheng Design of portable sleep apnea hypopnea monitor instrumentation JJJOURNAL OF ELECTRONIC INSTRUMENT 2011 25 9 812 816 MEASUREMENT AND 10 Que Xiao sheng Yang Hao Tang Rong Electret microphone in heart sound acquisition applications J Journal of chongqing university natural science edition 2007 30 10 33 40 11 Guan Shuo Guan Ji shi Implementation of Fat 16 File System on Single chip Computer J SCIENCE amp TECHNOLOGY INFORMATION 2008 13 409 410 12 Deng Jian Yang Xiaofei Liao Junging Analysis and Real ization of FAT Management System J and Digital Computer Engineering 2005 33 9 105 108 75 The English Proceedings
197. n in table 1 Tab 1 Braking distance and avoidance distance test results WM RBC 1 2 3 4 5 6 q AJR cm 3 1 3 0 32 2 9 31 3 0 2 8 WISESA em 5 0 50 49 50 49 5 0 5 0 By the test results can be seen obstacle avoidance distance is greater than the braking distance to avoid the damage to the car Especially due to operator error lead to the small car appeared out of control make the car collision damage Join the obstacle avoidance system can effectively prevent the car collision damage make rescue robot can stable job 6 CONCLUSION Design life detection and rescue robot both life and timely rescue two big functions Appearance design is unique can move freely in a relatively narrow and complicated environment to complete the search for life positioning and effective relief The design concept of a hierarchical design process the system 1s divided into communication and execution layer A clear division sensing layer policy makers of responsibilities between the layers and collaborate with each other forming a real time and efficient pipelining structure n2 Rescue robot is a new kind of robot a practical form small function complete has the characteristics of easy to operate The robot is compared with the existing life detector function more and more concentrated and practical safe and reliable can play the role of the larger is suitable for real life detection and post disaster relief products Sl Based on th
198. n xie phylogeny of instrument Journal of Chongqing University of Artsand Sciences 28 4 13 Shenlin wen Physical experiment M Guangzhou South China university of technology press 1991 14 Chengzhou ji The basic knowledge of electronic oscillograph J physics 1975 06 15 Wuhan University electronic circuit Teaching Materials Writing Group electronic circuit M Beijing People s Education Press 1979 14 Li Na etc Design and Implementation of the full range of sub control intelligent lighting system Design and Implementation of the full range of sub control intelligent lighting system Li Na Zhang Tao Ye Jiansong College of Instrumentation and Electrical Engineering Jilin University Changchun 130021 China Abstract In order to create a good lighting environment making full use of the outside natural light to control dynamic lights with low power consumption and intelligent characteristics the intelligent lighting control system is based on the STC89CS51RC single chip microcontroller as the processor composed of light intensity sensor module LED module and LED drive circuits It can automatically adjust the brightness supplemented by the outside light intensity saving energy and realizing sub regional control functions The detection accuracy of light intensity is less than 1 0 lx adjusting time is less than 2 0 s through actual measurement Compared with ordinary fluorescent lamp energy savin
199. na probes sensors amplifying circuit filter circuit and single chip microcomputer to deal with signal and the results will be displayed on the LCD panel There will be alarm when beyond the limit It has small volume easy to carry convenient measurement etc In 20 hz 3 MHz wide frequency range the instrument is easy to measure the strength of the electromagnetic radiation Using three axis loop antenna can do comprehensive measurement of the electromagnetic radiation rapidly and display of the electromagnetic environment of the evaluation results Key words Electromagnetic Radiation Measuring Filtering Magnify Antenna 0 FOREWORD WITH the progress of the society and the development of science the computer as a kind of modern high tech products and electrical equipment have become an indispensable part of People s Daily life When people enjoy fast efficient and convenience brought from the computer at the same time there are different degrees of concern Because all kinds of household appliances mobile equipment and other electrical devices when they are working they will produce different degrees of electromagnetic radiation Electromagnetic radiation pollution become the forth pollution after water pollution air pollution and noise pollution Due to the feature of electromagnetic radiation which is colorless odorless invisible and scratching people can not through the senses perceive this invisible pollution Re
200. nally the preparation of PC system program Control and management of the main program is the core of the system is powered on the first initialization the system begins normal operation and then carry out the temperature and humidity monitoring and processing operations 3 2PC software design System complete function position function displays the serial number indicating whether the serial port has been successfully opened Meanwhile the PC and the next crew to simultaneous display of temperature and humidity of each node in the range of temperature and humidity over warning after the buzzer control slave alarm PC software is available on the PCthroughVC6 0 prepared mainly on the MSCommceontrol and CserialPort class operation The first 1s the serial port settings The system uses the CSERIALPORT class initialization function InitPort this nport nbtl N 8 1 m dwCommE vents 512 Which nport for the serial number nbtl baud rate you can use the serial port settings dialog baud serial number and two combo boxes initialization function were obtained in nport and nbtl Followed by the upper and lower limit son the temperature and humidity _ settings Available CSERIALPORT class start serial monitoring process function Start Monitoring send the string functions Write To Port and close the serial port processes Stop Monitoring for upper and lower temperature settings the information is sent to the serial port through these functions t
201. national consumption million 3 77 secondary industry consumption rose 12 consumption of the tertiary industry grew by 14 Residential electricity consumption in urban and rural areas rose 10 for more rational utilization and conservation of energy we ve designed this smart eye and accompanied by energy saving a Selling lamps now used by most lights are incandescent bulbs or LED there is a major flaw such as light luminance should not automatically adjusts with changes in the environment resulting in the light is too weak or too strong prolonged use can damage people s eyes and cause eye fatigue Even eye lamp whose light brightness only by manually adjusting and limited their stalls does not fully meet the user requirements and do not remind users seated correctly In addition common eye lights and lamps 54 low efficiency even if the use of energy saving lamps still can not cover up the abuses of its efficiency is not ideal General lamp lighting area as a single lamp or LED focus light spot after a block such as writing Office hand and inevitably result in blocking form the shadow areas affecting Office writing Based on the above three points to design a set of eye shadow and efficiency as one of the smart table lamp to fill the vacancies in the market 1 SYSTEM CIRCUIT DESIGN 1 1 The overall design of the system y power gt control gt lamp l Body detection power
202. ndamental of fiber detector is to fix the detector on the cantilever get the shaking signal by vibrating reed Inlet the fiber signal on the other side at the same time meanwhile producing different light wave by the influence the signal acts on the reflector plate Measure it and then get the data calculate the data we need The damping part is really important Only when the damping ratio reaches to 0 707 do we receive the well shaking signal In order to analyse the damping ratio first we need to simulate the stress of the magnet in closing coil Frequently used magnetic field simulation software are ansys matlab ansoft and so on After comparison we choose the ansoft Ansoft Maxwell 2D 3D is a powerful precise and easy soft from Ansoft company It includes electric field magnetostatic field vortex field transient field and temperature analysis module It can analyse the static state steady state transient state normal condition and trouble condition of electrical machine sensor transformer permanent device and exciter It has UI from top to bottom banner adaptive mesh generation technic and uses definition database making it has better usability It also has the capacity 115 The English Proceedings of the College of Instrumentation amp Electrical Engineering Jilin University in the Second Half of 2013 to use high performance matrix to provide the fastest speed Ansoft has some advantages 1 It has perceptual int
203. ned an price therefore its promotion is intelligent burglar alarm system based on MMS it is practical and stable it can effectively prevent illegal theft of vandalism In our country home security alarm systems have become the basis for achieving safety management in intelligent community Intelligent alarm is part of the family 13 the alarm equipment is mainly in two areas develop faster development of the detector and the detector on the one hand on the one hand is the development of remote alarm systems Detector has emerged mainly in the development of three different passive infrared ultrasonic and microwave detection technologies different types of detectors are expected to emerge Has emerged mainly in the development of remote alarm system wired alarm system wireless alarm system alarm and protection networks At the same time a lot of burglar alarm systems introduces FPGA technologies In addition along with the extensive video surveillance system centralized 88 network monitoring demands more and more especially the green city construction and telecommunications operators such as Netcom s involvement making further accelerated the pace of the network In recent years the security industry develop in IT very fast While domestic security technology development smart security penetration but my relative abroad still has a long way to go Abroad has successfully developed several sets of sophisticated we
204. ng accuracy and also meet the needs of portability and practicality 1 SYSTEM COMPOSITION AND WORKING PRINCIPLE The pedestrian dead reckoning device contains a heading sensor module a data processing module and a display module the specific composition diagram is shown in Figure 1 Luo Yin etc Pedestrian Dead Reckoning Device Design Based on STM32 Accelerometer Elect Data conversion module STMB2F 103 RBT6 ronic compass LSM303DLHC Gyroscope MPU3050 __ 3 STM32F 103 Data procession module RBT6 ILI9320 Figure 1 Block diagram of the system The three dimensional sensor module is divided into the triaxial accelerometer and electronic compass chip LSM303DLHC and gyroscope integrated chip MPU3050 and micro controller STM32F103RBT6 for data three dimensional sensor module is placed on the integrated processing The waist of the pedestrian while it is working the three dimensional accelerometer collects the acceleration in three directions use it to calculate the tilt angle and the pitch angle and estimates the number of steps and stride of the pedestrian The electronic compass collects real time heading data real time data of pedestrian The gyroscope measured three axis angular velocity to correct the calculated pitch angle and the tilt angle in the unit time The MCU is responsible for converting raw sensor data uses the serial port for communication with the data processing module The core da
205. ng the formula 7 p ra You can calculate the emission point to the obstacle distance s This system requires high precision because of the influence of velocity of ultrasonic wave propagation in the temperature changes greatly so the method of temperature compensation to correct the temperature Formula is obtained by the following calculation p TE a f af 31s m s 33145 x 1 Type q is the celsius temperature The system uses eight ultrasonic were placed around the model cars in the composition of environmental measurement device that can pinpoint the parking spaces in the environment as well as by the surrounding environment for body posture angle to ensure the reliability of the system 1 2 Motion modeling In order to be more intuitive and simple to solve this 137 The English Proceedings of the College of Instrumentation amp Electrical Engineering Jilin University in the Second Half of 2013 particular vehicle of automatic parking procedure the model car vehicle kinematics model is established which simplify the car into a rectangular rigid body based on ackerman steering geometry kinematics model of the car For the car model in this paper that we study it can be simplified as two rounds of car model vehicle front axle midpoint as reference to describe the movement of vehicles ackerman steering model is set up as shown in figure 1 Fig l Ackerman steering model Xps Frj x Fp in Fig l denot
206. ng the system clock frequency and accumulator digits according to the actual needs There Shi Zhaomin etc The design of lowcost Vibroseis based on FPGA is a relationship between At and Y According to Ay we can calculate the corresponding At values Calculation method follows ES _DFFRW SYSCLK DFW 5 T frequency sweep signal scan time Through IP core multiplier and divider operation design can be more convenient The result is not Simulation Waveforms Simulation mode Timing necessarily an integer so the calculation results processing uses rounding algorithm to reduce calculation error In addition to the frequency control word module frequency sweep wave module design includes phase accumulator module and waveform data ROM table Figure 5 is frequency sweep wave simulation diagram k is pulse count for gate time The smaller the k value is the greater the frequency is K value from the figure the frequency of frequency sweep wave linear change over time 181 ns Pointer 246 57 ms h Master Time Bar 41 943 ns 83 886 ms 125 829 ns J ps 18 1 ns choice clk reset signal H k v ONCE Ce A A A A A A E nn nc ne noc E A E A A A A A A E L A A A A E A A A G A A E A G E A A A E G A 167 772 ns Interval 209 715 ms 246 57 ms Start End 251 658 ms 293 601 ms 335 544 ms TT 487 ms 419 43 ms 461 373 ns Figure 5 frequency sweep wave simulation diagram
207. ngle chip microcomputer the combination of general microprocessor with Flash memory together it can wipe again and again so can effectively reduce the cost of development It has 40 pins 32 external bidirectional input output I O ports also includes two external interrupt port two 16 bit programmable timer counters two full duplex serial port it can be programmed according to conventional methods can also be online programming SCM system work constantly refresh RAM appropriately processed data to the LCD display if there is an exception it will be sent via SMS alarm message to a specific preset phone number and make the appropriate measures to inform heads of households achieve dormitory remote security 2 2 the pyroelectric infrared module The body has a constant temperature generally at 37 C it will emit a lot of infrared around 10um Human body emits infrared light through the Fresnel sheet enhanced infrared sensors gather source Pyroelectric infrared sensor element this element in body temperature changes will be lost when the charge the human receives infrared radiation balance outwards released charge the subsequent processing circuit has been tested and will be able to generate an alarm signal Pyroelectric infrared sensor itself has not made any type of radiation advantages and the device power consumption good concealment low prices But it is also subject to various sources of heat light interfer
208. nnector 9 pin serial port We take into account effect which the power input ripple affects on the microcontroller We increase an electrolytic capacitor 1 uF at the pins of the power supply to implement filtering and reduce input disturbances Microcontroller has input of analog power so we need to consider the interference problem Interference in the system is relatively small so analog and digital earth is together Input of analog power supply increases a filter capacitor to reduce interference RS232 serial communication circuit is shown in Figure 9 Figure 9 RS232 serial communication circuit 2 2 The software design SCM and PC interface programming Single chip uses c language to write in Software design is the IAR compiler Host computer interface uses the c language to write in the Microsoft Visual Studio 2005 software 2 2 1 Microcontroller programming Single tablets machine program overall process as Figure 10 by shows first through programming on LCD initial of collection to of voltage signal through MSP430F149 internal of ADC12 for conversion each accept once data are to sent to LCD Shang displayed due to displayed of voltage value not steady has flashing changes so take repeatedly of voltage value weighted summed get a eventually to displayed of CV t V 4 55 10065 00 foots voltage value Through this programming method and technique can be stable measurement of voltage values are displayed
209. ns of PWR _UP TRX CE and TX _EN controlled by the external MCU Figure 1 Working pattern and corresponding functions of Nrf905 PWR_UP TRX_CE TX_EN LIERE 0 x x fi EB AL SPI Sa FE l 0 x ISHLA SPI SAFE l l 0 Shock Burst RX l l l Shock Burst TX 2 5 Alarm Hardware Circuit Design The designed system plans the alarm circuit and alarm cancellation circuit When the temperature YangShuXin etc Design of nRF905 based Wireless Greenhouse for Environmental Parameters Detection and Transmission System humidity lightening strength in the greenhouse is over the normal parameter scope the program sets the buzzer of the system gives out the sound of alarm and the red indicator light 1s on at the same time When it recovers to the normal the alarm cancels automatically And in the proper parameter scope only the green indicator light is on Hardware circuits are shown in Figure 5 Figure 5 Alarm hardware circuit 3 SYSTEM SOFTWARE DESIGN The software design of the system consists of the main program flow and the sub program flow The sub program flow can be divided into Temperature sub program humidity sub program wireless transmission sub program serial sub program and upper machine program The emphases in the software design process are the test of temperature humidity lightening strength the wireless transmission of the data The overall flow figure of the system is as shown in Figure 6 and Figure 7 ACERS HiT TE PI
210. ntelligent alarm system based on MMS Zhang Yixuan Zhou Xianze Liu Yan Jilin University electrical engineering and automation Changchun 130001 Abstract This article introduces an intelligent alarm system based on used cell phones and mainly describes the composition and structure of the system as well as the hardware and software design in detail This system uses old cell phones to send and receive messages in order to supervise and control our home safety We use infrared sensors to collect information and use network information technology to get the accurate warning When the owner receives the alarm information he can know the situation at the scene so he can call the police in time to ensure domestic safety and security The structure of the system is simple and it is not only easy to install but also convenient to operate Key words MMS alarm intelligence security home safety used cell phones single chip microcomputer 1 INTRODUCTION WITH the increase of urban floating population city social security situation is getting worse Daytime shelter night time warehouses store may be in a State of no one left behind which provides opportunities for criminals At present most residential burglar use anti theft iron fence which is not beautiful and hard to escape Some high end home alarm system cannot be accepted by consumers because of its expensive limited 1 Considering the family need our team desig
211. ntroller Theory and Applications China Railway Press 2006 5 Yang Suxing Analog Electronics concise tutorials Higher Education Press 2008 4 Tan Haoqgiang C programming Tsinghua University Press 2007 5 Li Wei Duan Cuifang Hua Weijuan greenhouse monitoring systemat home and _ abroad development status and trends J Chinese fruits and vegetables 201006 Zheng Wengang ZHAO Chunjiang Wang Jihua Greenhouse Intelligent Control Research Progress J Agriculture Network Information 200402 Zhu Zhanshan etc The teaching auxilisry system based on the light cube The teaching auxiliarv svstem based on the light cube Xin Yi Zhu Zhanshan Chen Xu Jiang Jian College of Instrumentation amp Electrical Engineering Jilin University Changchun 130022 Abstract As the traditional teaching methods teaching the solid geometry mainly relies on the cards and the physical teaching tool but this way is rigid and boring in order to solve the drawbacks of teaching this paper proposes a method by developing a 3D LED matrix forms as a teaching auxiliary appliance 1 This kind of teaching tool is much more vivid than the wood plastic models or PPT Through the light cubic 3D model to display teaching content the attention of students will be attracted the student will understand the knowledge of the books much more deeply And we develop the PC control software and the os on the chip The system has been proved effective Keywords
212. nts and show it by mashlab It can complete range within close distance 0 1 m to 4 3 m with the precision of millimeter scan the object from multiple directions and generate the 3D point clouds Compared with other advanced scanner The advantages are of low cost the softares used is free easy to disassemble the maintain button panel can be operated easily and standby batteries is available This is a alternative of the expensive instruments when scanning 3d point clouds and non contact ranging Key words Engineering measurement three dimensional scanning stitching registration image acquisition point clouds CLC TB22 Document code A scanners can complete the scanning task perfectly 0 INTRODUCTION American MakerScanner and grape3D promote appling to the Household three dimensional scanning IT is on the laser scanning and storage of 3d point production with rapid scanning system at low cost clouds data which can be used for 3d model reconstruction SELECTION OF THE RESEARCH SCHEME Since 1995 Swiss company Leica launched the prototype of the first three dimensional laser scanner of the world 3D laser scanning technology had gone through a course of 18 years 3D scanning has a wide range of applications such as digitized monuments industrial site monitoring inversus engineering rapid prototyping game production modeling fast garments increased material manufacturing straightening teeth cosmetic and biological tissue
213. o automatic parallel parking system Steering Control Strategy D Jilin Jilin University 2010 12 Zhou Jian Embedded fuzzy automatic parking system D Journal of Guangdong University of Technology 2011 13 Yu Wei Zhang Nat yao white sail parking problem of fuzzy optimization control scheme mechatronics 2001 No 5 14 Chang Jiang Fuzzy Controller Based on Genetic Algorithm Design and Application Northwestern Polytechnical University master s thesis 2006 15 LEI Ying jie etc MATLAB genetic algorithm toolbox and its application Xi an University of Electronic Science and Technology Press 2005 16 Meng hu1 Xia Geng jun Mei Fuzzy Control Based on MATLAB simulation system car reversing J Zhong yuan Institute of Technology 2009 20 1 75 77 141
214. o complete the change from humidity to frequency And the circuit 1s shown in Figure 3 pi 4 Figure 3 Humidity test hardware circuit figure 78 2 3 Design of Lightening Strength Collection of Hardware Circuit The test of lightening strength uses TSL2561 TSL2561 can program and set the upper and down valve value with the direct I2C connector which can be used to change the lightening strength to the output of digital signal so as to pass the I2C bus access so the hardware connector circuits are very simple Ml Tts internal part consists of two paths of photosensitive diode passage 0 is sensitive to both visible light and infrared ray and passage 1s only sensitive to infrared ray Two paths integrating ADC makes current integrals on two photosensitive diodes change them to digit quantities and save into the numerical register of each path Its hardware circuit is shown in Figure 4 INT 49 pe 0 pe l Figure 4 Lightening Strength test hardware circuit figure 2 4 Wireless Transmission Module Design Wireless transmission uses nRF905 chip This chip can set the address by the software and directly connect with various MCU for the use with very convenient software programming nRF905 has two working partterns ShockBurst RX reception mode and ShockBurst TM emission mode and two kinds of energy saving modes electricity drop mode and standby mode 1 These modes are determined by the high low level of three pi
215. odel design The design of the hardware circuit includes Freescale k60 minimum system module design ultrasonic circuit design steering motor drive circuit design DC motor drive circuit design circuit design video capture voice module circuit design Hardware system circuit diagram shown in Figure 3 Ultrasonic Servo drive Steering Module lt Ed circuit gt servo Encoder lt Freescale p Damoto gt DC motor drives K60 Axisgyro lt q Voice Image W module lt gt acquisition kK Power management Fig 3 system block diagram 2 1 Ultrasonic Ranging circuit When the vehicle passes through the parking position the ultrasonic sensor signal received by the controller to identify and store information about the scale of parking the parking area to establish a map Ultrasonic ranging subsystem hardware module structure shown in Figure 4 Sensor 1 Signa Power a EG Al Transmitting l Modules Sensor 1 Signa 4 ivi gt 1 lt q Receiving cee or Signa Sensor 2 interface circuit lt p gt selec gt gt ten Freescale Sensor 3 interface circuit lt p K60 Sensor 8 interface circuit lt gt Fig 4 the hardware module of ultrasonic ranging system 2 2 speed and steering angle measurement circuit
216. of 1 45 The best local error analysis system actual height error is 0 2cm height error of 0 16cm This system can stably control sphere of lifting height ensure the sphere to specify the height within the given time and 4 SUMMARY How to arouse the enthusiasm of the students is an important problem existing in the actual teaching the teaching tools can enrich the teacher lectures improve the students learning efficiency and active classroom atmosphere System adopts motor closed loop control method to precisely control the Angle of the machine we can control the sphere s height change precisely by controlling the pipe pressure The actual height error is within 0 2 cm With temperature compensation of ultrasonic distance measurement method we can accurately indicates the lifting height of the ball and ensure that system actually displayed the error is within 0 16 cm the relative error is 1 45 the system reflect the status of pipe pressure precisely and visually by controlling the sphere movement Using the wireless control the teacher controls system conveniently and simply Students can deeply understand the meaning of the air pressure stimulate the thinking and explore the scientific knowledge References 1 Zhao Tong Pneumatic Technology Development and Application of the New Field J Shanghai PTC technology BBS 2003 2 Cui Bao jian Li Guo xin Precision pressure control method based on proportional v
217. oller and embedded 18 system application 2012 6 Kang Huaguang Electronic Technology Analog Higher education press 2006 116 118 Pei Li ran etc Research on wireless synchronization device in superficial seismic exploration Research on wireless synchronization device in superficial seismic exploration Zhang Lin hang Pei Li ran Sun Zi chao Wang Cong College of instrumentation and electrical engineering Jilin University Changchun 130061 China Abstract In order to better solve the time synchronization problem of shallow seismic prospecting signal acquisition Put forward a data acquisition system of shallow seismic exploration based on wireless network It uses AT89C51 micro controller as the main controller Use AD7705 modulus conversion chip with low power consumption and high resolution to realize data collection Choose nRF24L01 set up wireless network According to the characteristics of modulus conversion unit and MCU Design the power module and the voltage stabilizing circuit to realize accurate flexible power supply By determining the real time data of different transmission distance Use seismograph for time compensation thus realize data acquisition synchronization Solving the complex wiring and synchronization problems when the conditions for exploration realizing low power portable and synchronization function in the shallow seismic exploration Tests show that the system power consumption is 2500mW
218. oller design and oblique parking fuzzy controller design similar to the way the three kinds of controller design this paper discusses the vertical parking as the case of fuzzy controller design The design of the fuzzy automatic parking system control block diagram is shown in figure 2 Fuzzy rules Data Fuzz prepr Fuzz Fuzzy y ocessi gt gt gt judg y Reasoning ng Steering servo Environment collection Fig 2 Fuzzy automatic parking system control diagram The fuzzy controller inclued four parts which are the fuzzification fuzzy reasoning fuzzy judgment and fuzzy rules CPU mainly through the following three steps to realize fuzzy control First get the vehicle rear axle via ultrasonic array center coordinates p Vp and body heading angle 0 the ultrasonic sensor data sampled fuzzy Second according to the fuzzy control rules combined with the experience of the driver s actual parking the fuzzy control quantity is calculated Last judgment on the amount of fuzzy control to draw firm steering servo output to the control model car front wheel steering Through the simulation analysis ofthe fuzzy controller the appropriateadjustment in the actual operation debugging and ultimately the precise parking control 2 HARDWARE DESIGN AND SIMULATION FU yu jing etc Fuzzy control based on ultrasonic ranging parking system m
219. omagnetic field M Beijing Electronic Industry Press 12 Jiang Desheng Chen Daxiong Liang Lei The adhibition of ANSYS in design of fiber Bragg raster accelerometer J 2004 23 11th 13 Lv Gonghe Theory and features of seismic exploration detector and relative analysis J petroleum exploration 2009 November 48th of 6th periodical 14 Liu Hanping Wang Jiangang Cui Hongliang Chen Bing FBG earthquake detector J handong University college journal The 37th of 2nd periodical 15 Li Xiangsheng Active control and simulation of electromagnetic damping suspention J Agricultural machinery 2004 120 Wang Duogiang etc Intelligent House Leakage Detection and Alarm System Intelligent House Leakage Detection and Alarm System Li Suy1 Wang Duogqiang Bai Yang Zhang Weijie College of Instrumentation amp Electrical Engineering Jilin University Changchun Jilin China Abstract This study designs a kind of discontiguous reflected liquidometer system which has the characteristics of low cost high resolution high sensitivity and high anti interference capability It fits for the minimum liquid height and can be applied to the house leaking The photoresistances that are linear set on the liquidometer are used to receive the laser signal to improve the resolution The discontiguous reflected liquidometer system consists of sensor MCU GSM and power supply The hardware circuit design software design detection
220. omputer based integrated b When the voltage value exceeds the voltage thresholds for the first time LCD alarms and buzzer automatic reclosing device J Journal of rings The normally open recloser relay switch off and Liaoning Institute of science and technology 103 The English Proceedings of the College of Instrumentation amp Electrical Engineering Jilin University in the Second Half of 2013 2008 3 1 2 3 Zhou Xingkui Tian Jianwen New type of microcomputer principle and application of automatic reclosing j Gansu water resources and hydropower technology 2011 11 12 15 4 Long Qifeng Chen Hao Secondary cause of coincident failure analysis J Electrotechnical 2012 12 10 13 5 Chan Ming fai Zhang Shaofang Wen Fushuan Second enclosure and secondary secondary recloser application in distribution system J Journal of North China electric power University 2011 38 2 21 26 6 Wang Zhibin Yang Haiping discussion on reclosing and automatically restore power supply J Journal of Chongqing electric power 2005 10 1 1 3 7 Xu Hailong Transmission line transient faults and preliminary analysis of the effect of automatic recloser J mechanical and electronic information 2012 32 33 8 Tamel Han Xiao Zhao Guoyu RANDT Li Yongjing Tian Zhuang reclosure reasons analysis and prevention measures of misoperation J electric power system protection and control
221. ond Half of 2013 reversing automatic parking System software flowchart and automatic parking system flow chart are shown inFigure 6 and 7 stan parking v Open reverse image Ultrasound data acquisition Fuzzy Control Parking Heth arrive Park Parking spaces adjustment v Perkin Finish Fig 7 Flow chart of automatic parking system Body attitude 4 TESTING AND ANALYSIS This design created based on fuzzy control parking ultrasonic ranging system model vehicle model measured by ultrasonic rear axle center coordinates as parking start position in Matlab Simulink establish vehicle kinematics model and fuzzy controller and automatic parking process simulation verification of the fuzzy controller design is reasonable and the accuracy of the design Vertical parking for example the Matlab Simulink simulation results shown in Figure 8 Fig 8 the simulation results of automatic parking matlab Simulink While the same proportion to the size of two model car as a reference vehicle according to the proportion of the actual design of the garage parking spaces two empty spaces reserved between the reference vehicle the test results shown in Table 1 140 Table 1 Automatic parking measured results number l 2 3 4 5 6 tests Timespan t s 6 9 6 6 6 7 6 9 6 8 6 6 Front heading 0 15 30 45 75 80 angle Whether NO YES YES YES YES NO P
222. ontrol the single chip Under the same conditions Switch off button and Switch on button transmit directives to the single chip computer by serial port they can directly control the electric relay to switch off on when the system run normally The most important point is using the Serial Portto control serial port in design firstly set the communications port name the baud rate and other parameters then open the serial port 102 receive the data judge the data and display in the textbox Figure 12 1s computer software design flow chart Load the form l Initialize the serial communication Y Y Y Receive real Get voltage Response time measure the threshold and tripping and voltage gt update in the gt closing i textBox instruction Delay time The main page shows v Y greater than the Will be updated ELUSIVE threshold data sent to the ee voltage microcontroller Single chip microcomputer The font is displayed in red The threshold voltage Figure 12 Computer software design flow chart Computer VS boundary is shown as Figure 13 ftom Hi RR PRA AELEZ RESALE sk i pl HEREA 400 1 V d E Pea fA 200 V HEI AE 100 ms Figure 13 Computer VS boundary 3 THE TEST RESULTS ANALYSIS 3 1 The analysis of voltage measurement The industri
223. ority LED matrix scan task with the lowest priority In order to avoid the high priority task has been to seize the kernel the high priority task will run once again hang themselves freeing the kernel so that low priority task canuse the CPU 7 8 SY Figure 4 Slave controller flow chart 3 SYSTEM TEST By the PC software we set all the flag of the shape true All the LED should light up click on the modulus button call a serial port control sends the data to the slave controller after all operation the display as follows FEO FF 0 FF 0 oH FO t g OP OXF OxPP OxFP OXF OkFF OFF 0 FF 0 FO FFO nFF O SF SPF O RPF O RFF O KFE O KFF O lt FF 0 FO SFP xFF OxFF OxFF OxFF 0 Figure 5 PC software interface Zhu Zhanshan etc The teaching auxilisry system based on the light cube Figure 6 Physical presentation charts 4 CONCLUSION PC control via light cube matrix display can make a complex geometry and has a good display but the resolution is too complex geometry constraints received the display is not very good the PC used LED is mapped to a physical host machine control method which requires the use of a person with a good spatial imagination How to allow users to draw directly on the host computer 3D graphics as well as to improve the display resolution will need to be furth
224. ortant non direct contact instrument of SAS which can send data by Bluetooth or store the data on SD card The prototype was tested under laboratory conditions and the results show that the device can achieve the non direct contact detection of breathing signal and analyze SAS automatically 1 OVERALL STRUCTURE OF THE SYSTEM EDR algorithm automatic detection The system is composed of signal acquisition module data storage and transmission module host computer data processing module and an automatic detection program The system structure diagram is as shown in figure 1 Data storage Signal acquisition module Key and transmission module Analog icy Electret P signal p SD Card conditioning MCU ft Pc MSP430F149 Analog i Electret P signal gt Bluetooth conditioning Lim ia nade wan AN Ne a ae a eh AO Dae Sah ee A sis Sore tee Se Fig 1 The overall structure diagram 2 HARDWARE DESIGN AND IMPLEMENTATION 2 1 Sensor selection There are three main ways to detect respiratory signal using simple instruments currently 1 Using a thermistor to measure temperature changes of the nasal cavity but the sensitivity of sensor can be reduced after repeated use 2 Using a pressure sensor to detect pressure changes of the nasal cavity but the pressure sensor
225. own VIN VOUT TEMP a TRIM SEL 9 I C3 C4 R1 4k7 C5 10uF 4 AD780 10 uF 0 1 HF Fig 3 AD7705 and single chip computer connected to the circuit diagram The AD7705 chip in 5V analog voltage and by the AD780 2 5V reference voltage regulator chip provides between capacitors and ceramic capacitors in parallel to form a Accurate analog voltage and electrolytic decoupling circuit in order to improve the update rate of sampling frequency get higher data the master clock frequency of AD7705 1s set to 2 4576MHz in addition AD7705 the integrated amplifier filtercircuit no additional signal conditioning circuit The acquisition system integrated simple to meet the system is small portable design requirements 3 THE DATA TRANSMISSION MODULE DESIGN VOCC_RF Cl 2 1 OLF 00n F New system uses NordicVLSI company working in the global open 2 4 GHz ISM band rate 2 m bit s nRF24L01 radio frequency chip 13 and is controlled by single chip microcomputer AT89C51 achieve short range wireless data transmission system Given nRF24L01 on chip integrates modulator crystal oscillator frequency synthesizer power amplifier module make its stable performance anti interference ability is very strong 14 this also happens to meet the needs of our integrated low power portable anti interference moreover nRF24L01 wireless module works simple easy to connected to the micro controller 15 wireless module sch
226. p a family of low priced reliable operation of multi function intelligent security alarm system is imperative 2 THE OVERALL DESIGN The system can be divided into three parts named window and door modules phone keypad locks control module and sound detection module Through the master chip STC89S52 control sends warning information 2 1 Door and window sensor module LM393 dual comparator and uniting IR tube sensor intrusion judgment and collected converts analog signals to digital signals sent to the controller chip STC89C52 chip sensor module transmits a digital signal analysis and calculation on the control module sends a response signal System for tubes using infrared sensors are sensitive to detect the invasion signal 6 the flowchart in Figure 1 Sensors and A D STC89C52 Figure 1 Door and window sensor module flowchart LM393 dual differentia 2 2 Phone keys control module Phone keys for selected relay module and the control module consisting of vintage old phones 5V relay wired to connect with the phone keypad forming an external key 2 when intrusions and SCM STC89C52 sends a signal through the corresponding phone keypad relay modules called achieving photos send photos and a series of actions 7 at the start light and buzzer alarm deter intruders The flow chart in Figure 2 STC89C52 gt Pic user K Prone Send MMS Fig 2 mobile phone keyboard control module flow chart 2
227. pagation in the air is 340 m s According to the timer recording time t measure distances 7 as follows Although it is in the lifting pipe height measurement because the lifting device has good sealing system lift tube in different speed of the wind will not affect the transmission of ultrasonic velocity and will not affect the ultrasonic measurement precision Temperature and humidity will affect the speed of ultrasonic propagation so the result of the measurement is for temperature compensation 8 2 THE DESIGN OF SYSTEM SOFTWARE The control unit A program structure diagram The control unit It program structure dingram Fig 5 Flow chart of system software Control unit A displays receiving sphere movement state data and Scans buttons at every time When the set button is pressed we can set menu that sphere movement rising height rise time such as man machine interface and send parameters to the control unit B through the wireless way After the control unit B receives the information from the parameters of A stepper motor open air valve according to the instruction information control valve tube gas volume by adjusting the rotation Angle of the valve control the height of sphere detect the sphere s higher level at every time and send higher level and rising time to the unit A through the wireless way 3 TEST DATA AND ANALYSIS 3 1 System testing In order to verify the reliability of system and
228. pping quantity of the transport task Most of the time delivery of goods vehicles can t go into the earthquake zone you need to replace other transport tools The robot has the function and has a certain obstacle ability can better adapt to the disaster area road conditions timely supplies to their appointed places At the same time it also has the ability to transport personnel can be in the process of round trip transport rescuers and survivors avoid human transport than Finally the miniaturization of robot carrying special supporting tools general perception system lead the CCD camera in the center of carrying platform can be in the large machinery is unfavorable and carries out the task in the ruins of the bearing and reduce the pressure on the rescue such as survivors trapped in wallboard Open access can be different from the different Angle direction at the same time select the 67 The English Proceedings of the College of Instrumentation amp Electrical Engineering Jilin University in the Second Half of 2013 optimization of channel guide trapped out of danger area Rescue workers external controller is used to control the robot to walk can through the camera picture back to control the robot move freely in narrow space at the same time rescue workers through the picture to see if there is a sign of life realize life detection Through dialogue with handheld PC to determine whether trapped alive understand the
229. principle and testing result are introduced By data analysis we can get the conclusion sensor resolution 3mm average error 0 19mm standard error 0 51mm This system can measure several kinds of house leaking and run normally at least 72 hours Key words house leakage discontiguous reflected GSM liquidometer 0 INTRODUCTION THE house leaking happens frequently and causes property loss especially in apartment It may cause other secondary disaster such as fire electric shock and short circuit The technology about intelligent alarm system is mature but lack for a kind of system that 1s cheap and high resolution In order to solve the problem we develop a system that can measure the liquid level fast accurately conveniently and can be used in ordinary family There are several detection methods to measure the liquid level sonic detecting technique 1 liquid short circuit method flow detection method Magnetic Float Gauge 2 Transducer technique 3 But all of these instruments and Diffused Silicon Pressure must contact the liquid directly that can be covered by the dirt leading to the inaccurate measuring result And the majority of current non contact liquid level detection devices use ultrasound as propagation medium The devices always get bulky expensive complex and can t be used in common family Although the non contact level detection method 5 based on the refraction of light can achieve the aim the liqui
230. problem arises The magnitude of the induced electromotive force is too small Even it is amplified 1000 times it is still not enough The result lead to the problem that the voltage is not enough to absorb the metal plate It is about two reasons that it cannot work One is the stiffness factor of the spring is too big the other is that the magnetism of the coil is too weak If the spring is softer or the current is bigger enough the coil would absorb the metal plate But it is hard to make the current bigger The uA741 cannot produce a voltage that is larger than its power supply the power supply we used cannot meet the requirement so it is really hard to achieve If the coil could absorb the metal plate it cannot ensure the circuit will work all the time because the metal exposed to the air for a time will produce a oxide layer the oxide layer will forbid the current when the two things get together So from the statements above Scheme II is rising 2 2 2 Scheme IT The circuit is showed in Figure3 Jiang Ransong etc The manufacture and simulation for electromagnetical damping of fiber detector Figure3 Coil induced voltage electromagnetic damping circuit Now state the form of the circuit and its working theory The circuit consists of two branches of magnets vibrators and two connecting coils and amplifiers When the system feels the signal from outside the cantilever will shake with the magnets together then the left
231. program it provides a convenient way for the calculation of mutual inductance Referrences 1 CenMinrui The mutual inductance of two same coaxial square coils J Journal of WuHan University of Engineering 2007 29 4 90 91 2 LiJunfeng LiWenjie The precise calculation of self induction of airborne electromagnetic transmitter coil J Geophysical computing technology 2007 29 17 20 3 ZhangXinghui et al The mutual inductance and the distribution of magnetic induction line of two coaxial circular coils J University physics 2007 26 7 21 24 4 ZuoXiaowang et al The discussion of mutual inductance of two parallel coaxial circular coils J Journal of HuaiYin Normal college Natural Science 2010 9 5 414 416 5 WangShuping et al The interactional force between the coaxial current carrying rectangular coils J Physics and Engineering 2007 17 5 11 13 6 ZhuSihua and YangWanmin The electromagnetic force between two coaxial parallel circle current J University physics 2005 24 10 24 26 7 XiangYumin The calculation of magnetic force between the parallel coaxial current carrying coil J University Natural Science 1997 20 6 49 52 circular Journal of ChongQing 8 DongHongxia et al Nonlinear coordinate transformation model and solving methods J Geomatics Technology and Equipment 2012 14 2 7 9 9 FengCizhang and MaxXikui Introduction to Eengineering Electromagnetic Fields M BeiJing High
232. prompt the password is wrong 5 TEST RESULT Our design completed the desired goal and realized the alarm signal acquisition STC89C52 single chip control and lock control And we also completed remote display and control through discarded mobile phone Image can be sent in real time Our systemis efficient easy to operate convenient and practical So it is full of market prospects References 1 Li Hong In single chip mobile phones send and receive text messages jJ Electronic technology 2003 29 1 24 26 2 Pan bin Guo Hongxia Peripheral circuit design of short message transceiver TC351 j embedded applications 2004 7 38 41 Microcontroller and system 3 Wang Xiaodong Li Lihong Liu Jimin etc remote weighing data acquisition system based on GPRS j electronic design engineering 2008 29 31 4 Liu Xin enjoy A design and implementation of MMS for vehicle monitoring j the application of electronic technology 1999 10 64 65 5 control a Guo Zhanlong intelligent home system based on single chip design j control and automation 2007 2 2 115 116 6 Areni Webster Sensor and signal conditioning m Zhang Lun translated Beijing Tsinghua University Press 2004 7 Zhang Guoyu Sun Xiangyang et al wireless alarm system based on GSM module j Journal of Changchun University 2009 32 1 51 53 8 25 2He Yibo Li Liqing with respect to my old cell phone rec
233. provide power to the coil Then begin to time It can show the magnitude of voltage when the coil on or off When the time is up the coil will cut off It needs a single chip to control Like ADC0804 NE555 and so on These chips are wildly used in toys and alarm systems and control circuit And the device designed is the combine of these things and serve the cantilever damping device The The delay Drive circuit and the load Display Figure5 The diagram of the system switch circuit produces starts to a signal work 2 The choice of the elements and applications in circuit 1 Information of SW 420 Now a lot of vibroswitches can be bought This kind of switch can close when it feels the shaking signal and it is really cheap It also has simple structure and it is widely used in many fields It can be seen as spring switch and ball switch The two kinds have important features They are sensitivity and directivity The so called sensitivity is that the different switches have a difference Users can choose different kinds of switches when they want to use them in different situations Directivity is the forced direction Most products have the requirement in sensitivity but not in directivity So there is a need to know something about how the users use them then decide which to choose The difference between the two kinds of switch is the 112 way they feel the signal The sensitivity of the ball switch is the de
234. rain type pressure sensor circuitis converted to analog voltage signal using A D 16 to improve the signal acquisition data processing precision synchronous signal picked up by the wireless data transmission module based on nRF24L01 transmission in digital mode is more accurate is the main part of the ensure the test signal and then reference measured datatime synchronization acquisition terminal of thewireless synchronous receiving and processing system to receive the data wireless transmission system transmits the same step by nRF24L01 wireless data same data the using the transmission module in exactly the wireless transmission wireless transmission relay and in synchronization through the specific delay time receiving delay resulting error _ timing meteror oscilloscope calculation of a seismic instrument synchronization adjustment using the software compensation method the error synchronizing signal to target 2 DESIGN OF DATA ACQUISITION MODULE plays an important role in the whole system Amplification Hammer source signal acquisition module circuit the anti interference ability and stability directly 20 affect the acquisition to the accuracy of the data The source signal acquisition module block diagram is shown in figure 2 er Ea gt on The AT89C51 pressu i host controller transducer unit A power supply module Fig 2 Data acquisition
235. range and image data C Hilton Head Island IEEE Conference on Computer Vision and Pattern Recognition 2000 1 531536 47 The English Proceedings of the College of Instrumentation amp Electrical Engineering Jilin University in the Second Half of 2013 The Design and Implementation about attendance system used in campus classroom based on RFID technology Li Jiaoyang Wu Ziyu Piao Guanyu College of Instrumentation and Electrical Engineering Jilin University Changchun 130026 China Abstract in order to make up the disadvantage that the traditional attendance system used in classroom brought such as taking up the class time Can not avoided on behalf of the named phenomenon that Behalf of named and so on At the same time in order to improve students class attendance and eliminates the burden that the teachers Statistics students usually scores manually brought Based on the above reasons we developed a attendance system used in campus classroom based on RFID technology The system combines student IC card which has been popular used on campus It use two alignment type infrared sensors combined FM1702SL wireless RF card reader to Get students name number and status that students out of the classroom or not Then the information will be transmitted to the host computer through the nRF24L01 wireless transmission module and the FT232RL level conversion circuit The host computer Statistics and organize information and Generate students usu
236. rcuit After adding the front of the camera has realized the rescuers on the remote control 1 to be able to let the aid workers have a better understanding of the disaster area topography and building structure to avoid the danger zone for rescue personnel safety threat After equipped with advanced detection radar can make rescue workers know the specific location of the survivor and instant life physiological state facilitate the timely rescue survivors of the weak the maximum increase the survival rate of survivors Fig 3 Pyroelectric sensor amplifying and filtering circuit Secondly in the aid mission through the study of the area of the center of the robot carrying platform optimization work make its carrying different task module components with different situations aid missions When carrying voice module can be one way or two way communication to guide and help the survivors of the action ability to save themselves and escape from work When powered hoisting components can rapidly finish the ruins of the disaster area road opening work When carrying infrared sensing module the robot can aid missions in the night in the 72 hours of uninterrupted gold time performing a rescue mission effective use of the valuable time improve work efficiency reduce the workload of aid workers and increases the chances of the trapped were rescued Again and carry through strengthening center platform make its can perform the shi
237. rn Although animation image screen demonstration of the ideal situation is not conducive to cause the students to understand and think for the reality of the physical phenomena According to illustrate vividly pressure meaning problem the author designed a sphere lifting height automatic control system based on air pressure control For pure pneumatic control system the complexity is higher and the corresponding costs are bigger 1 It s not suitable for the promotion of laboratory teaching In order to save the cost we adopt the combination of pneumatic technology and electric technology to complete the design Pressure control system has some advantages such as fast signal transmission high transmission efficiency and so on But its adjustment range and adjustment precision is lower than the same degree of hydraulic control system At the same time the noise is larger and the smooth degree is low 2 To make up for the shortage above system adopts pneumatic control combines step motor and pneumatic valve to closed loop network to enhance the accuracy of the system One light sphere goes through the system and the ball movement reflects pressure state vividly and maneuverably 1 THE SYSTEM HARDWARE DESIGN System set up by sphere lifting height and display unit A and sphere lifting height control unit B two parts Unit A man machine interface is used to set and display the ball movement information unit B is the main con
238. ro controller it adjusts the size of the accumulator output that is the number of addresses in an unit cycle Due to the system clock of the input of the accumulator fixed the more the number of the address unit period the longer the period when ROM receives the address of the accumulator type ROM transmits the address into the address stored in the correspondi ng amplitude information on the frequency output The output signal is the same as the accumulator input address 6 9 DA external high frequency output from the ROM is converted to amplitude informatio n output the output frequency is analog information determined by formula 1 in i KI 1 Where f is the system clock K is the frequency control word N is the number of bits of the accumulator Signal synthesis technology follows Nyquist law 132 that is not greater than the maximum output frequency of the reference clock half f lt f 2 The actual output frequency is determined by the decision to allow the output spurious levels in general f lt f x 40 Constituted under the same cycle of one complete cycle of discrete points the more the actual output signal of the smoother the more spectral components clean Because near surface exploration launch system is not greater than the maximum output frequency 50KHz designed with 20M to 100Mexter nal clock input frequency as the system reference clock cycles to get more points so that t
239. rol unit then store the data on a SD card or transmit the data by using Bluetooth to the host computer The automatic detection program can extract the respiratory signal from ECG signal using EDR algorithm and display the respiratory signals meanwhile give the automatic analysis of SAS for the patients Testing the prototype under laboratory conditions the result shows that the device can achieve early diagnosis of apnea syndrome with low power consumption and low cost Keywords SAS Electret SD card 0 INTRODUCTION Sleep apnea syndrome SAS is a potentially dangerous disease and was once known as sleeping killers SAS refers that apnea or hypopnea is up to 30 times every 7 hours or apnea is above up to 5 times per hour each time for more than 10 seconds during 1 Current clinical detection method is sleep Polysomnogram PSG Bl but it s complicated and the diagnosis is expensive The rate of SAS in the general population is 1 4 but is as high as 20 40 for the elderly over 65 IH Although population suffering from the disease is very large detection and penetration of sleep apnea syndrome is at low levels due to the long overlooked or missed diagnosis and family factors such as economic restrictions Patients who have the access to diagnosis and treatment in China are less than two thousandth of the total P So a portable low cost family sleep apnea detector is especially ol We designed an automatic test and imp
240. rror table Sample Actual Relative values value error Normal number of 1 22 students Foul number of students So 65100101 10 Student B Student D 65100101 Student E 65100101 10 Student G 65100101 10 Student I 65100101 10 Student J 65100101 110 Fig 10 PC software interface From the result we can know that the system can check the students whether they are go into the classroom or not accurately and determine whether students have illegal operations The system is reliable and effective 5 CONCLUSION The feature of the attendance system based on RFID is that it combines the Beam Infrared Sensor and the RFID card reader to detect signal In this way the system can measure students information and identify whether student is cheating effectively and accurately In addition the system use the multi point wireless transmission technology to achieve the transmit between the host computer and the lower machine The software of the host computer can help the teachers to know the information of the students in class conveniently and save the wasting time that handle statistic brought Therefore system can effectively solve the problems that traditional class attendance system had and improve the quality of higher education class So the system can do help to the intelligent management of colleges and universities The system uses modular design concept Although each module is functionally interrela
241. s DDFS technology this module can be divided into three child modules the control word of frequency module phase accumulator module and the tables of waveform data Frequency control module produces the linear 32 change of frequency control word that satisfies the scanning requirement 1 The design of frequency control According to the formula M SYSCLK 1 In the formula N the frequency of the accumulator Jou the output frequency SYSCLK the system clock FTW the frequency control word In this system N is 26 bits FTW is 16 bits SYSCLK is 50 MHZ the lowest output frequency is 1 Hz By changing the three parameters the range of frequency control word which satisfied the requirement of the source signal can be got 2 The frequency resolution design In the formula _ SYSCLK f a 2 f the frequency resolution Other letters are above meaning Based on the above indexes have resolution of 0 49 Hz which are meeting the requirements of the source signal source design We can increase the N or reduce t l to change resolution 3 Step time and frequency design In the formula DFW x SYSCLK DFW frequency stepping control word Af The step frequency Other letters are above meaning DFFRW 4 SYSCLK DFFRW the time step control word At Step time Other letters are above meaning In this system Af is 0 99 HZ We can design the need of step frequency signal by changi
242. s shown in figure 6 Initialization Wait measurement is completed analog digital Display and Figure 6 main program flow chart 5 CONCLUSION 129 The English Proceedings of the College of Instrumentation amp Electrical Engineering Jilin University in the Second Half of 2013 After testing this measuring instrument can almost complish tasks reach measurement standard and using the three component coil can accurately measure the space magnetic field intensity estimating the polarity of the magnetic field ensuring the high fidelity of the experiment data especially suitable for weak magnetic field measurement and has intuitionistic display interface In addition the system also has the advantages of compact structure small size low power dissipation easy to extend In the test of property coinciding with the theoretical value and performance well References 1 Feng Chi Zhang Ma Xikui Introduction to electromagnetic engineering M Higher Education Press 2 Huang Chunfeng Wu Jianping Environmental electromagnetic radiation monitoring methods J Environmental Study and Monitoring 2009 22 4 42 45 3 electromagnetic radiation exposure limits and measurement methods GB draft 4 Yang Xuanbing orgasm Guo color etc Based on single chip wireless home monitor portable design J Scientific Instrument 2004 S2 346 449 of mobile 5 Sun full red Ruan Lidong communicat
243. scharge right now I O output low level When the comparator output is low electricity at ordinary times the conclusion Vout lt Vin deal with capacitor charging the I O port output high level 2 1 4 Wireless transmission module This design adopts the wireless module which 1s nRF9OS transceiver Its working voltage is 3 0 3 6 V Stable transmission distance is 300 m NRF905 by frequency used single chip radio frequency synthesizer receiving demodulator power amplifier crystal oscillator and the modulator Its configuration is simple easy to use stable operation and energy saving etc 2 NRF905 33W 2 P20 F21 4 PH P54 6 F24 F25 5 F26 P52 l0 P51 F53 l2 P30 l4 Figure 4 nRF905 Pin diagram 2 2 A lower machine design 2 2 1 Wireless receiving module The wireless receiving part adopts and send uses the same nRF905 monolithic radio frequency transceiver module 2 2 2 Liquid crystal display module 12864 LCD liquid crystal display module used as the output of the whole system is responsible for each testing point of to data gathered by algorithm under a machine wireless electromagnetic radiation according module receives the 12 hexadecimal code conversion for 4 for 2 decimal number shown on the screen 12864 LCD working voltage is 4 75 5 25 V this design USES 5 0 V power supply The liquid crystal displays own word library has convenient operation low cost stable performance etc
244. scription on optical fiber liquid level sensor OFLLS J Optical Communication Technology 1995 2 131 136 8 Zhan Yang Variable Condenser Water Level Switch P Chinese Patent CN201869184U 2011 06 15 9 Sun Qingdian Li Canxin amp Cheng Yong Research and Design of Water Supply Pipeline Leakage Warning Monitoring Device J Water Resources and Power 2010 28 10 125 127 10 Yu Hongbo On the Leakage Alarm System D Beying National Library of The Center of the Fire Control Room 2006 11 Li Yuan amp Tie Yong Water Leakage Detection Algorithm Based on LMS Denoising Algorithm J Journal of Inner Mongolia University 2008 39 2 172 176 12 Yu Qixiang Leak proof Safety Lock and Water Leakage Alarm Systems P China Patent 125 The English Proceedings of the College of Instrumentation amp Electrical Engineering Jilin University in the Second Half of 2013 CN202329950U 2012 07 11 13 AT Command Manual 126 Yuan Guiyang etc Office computer displayer of electromagnetic radiation measure and alarm system Office computer displayer of electromagnetic radiation measure and alarm system Yuan Guiyang Shen Chunyang Liu Gucheng College of Instrumentation and Electrical Engineering Jilin University Changchun 130012 China Abstract In this paper a STC89C52 MCU based portable office computer display of electromagnetic radiation measuring instrument is introduced The instrument by anten
245. search shows that if the body expose in the intensity of electromagnetic radiation out of security for a long time will produce certain negative impact on health While for most of the white collar workers teachers and civil servants and other who long term close contact with the computer for a long time how strong is the electromagnetic radiation from the electromagnetic radiation and electromagnetic wave etc and sound noise light uv and visible light infrared radiation etc and so on how they influence on the human body have So the computer radiation measuring has very important significance for our life 1 SYSTEM SIMULATION Maxwell 2 d 3 d of Ansoft company is a electromagnetic field analysis software which is It includs field analysis module of electric field magnetic field eddy powerful accurate and easy to use current field the transient field and temperature field which can be used to analyze motors sensors transformers permanent magnet devices such as actuator static steady state and transient electromagnetic device the characteristics of normal condition and fault conditions It contains a top down implementation of user interface leading the adaptive grid subdivision technology and user defined material etc making it far ahead on the ease of use It has a high performance matrix solver and high performance processing capabilities which provides the solution of the fastest speed We use th
246. simulation which already have a greater development Some 3D scanning softwares generate a stl format flie which is the standard input file of some new 3d printers There is many researchs on three dimensional scanning both in the domestic and abroad famous softwares include Pro E HALCON David laser scanner and so on The majority of professional 42 There are three ways of scanning Modeling techniques using laser scanning as described below The first one is to make laser and camera rotate around scan and photograph the experimental object every equal angle at a time The second one is to make the measured object rotate around its axis of rotation when it is paused linear laser scan back and forth up and down and the camera keep still this way need conduct background coordinate calibration accurately before scanning The third one is to make the laser and the camera rotate around the axis of rotation on the platform While the measured object is still CHEN Hao etc A 3D scanning and laser ranging device based on Triangulation _ CMOS Ne Eos viewport2 viewport3 camera 3 o vie viewport4 Pex A we a viewport 10 kK we i SATS viewportd 5 EA OAE a i Toe UK i Pa g Pa 7 iewport6 viewport9 7 a anticlockwise ZEA KATN viewport8 viewport Fig 1 the equivalent schematic of Method Il Among the above three methods For small size object the first one is fast because w
247. sistor between the brown line and the black line in order to obtain a voltage signal 3 Its model is shown in Figure 1 The module detects a signal when there are objects between the launch tube and the tube At the same conducted the black line jump into ground and output receiver time the transistor the low level The module won t detects a signal when there are no objects between the launch tube and the receiver tube The black line will jump into positive voltage and output the high level The sensor s output level change process is shown in Figure 2 The uncovered The uncovered state state Cover state Time Fig 2 Sensor output signal Figure 1 2 Principle of FM1702SL Reader System uses FM1702SL as the reader ASIC of RFID FM1702SL is the non contact card reader ASIC 1SO14443 It contactless communication protocol by 13 56MHz based on supports type A and variety of encryption algorithms reading and writing operation s distance is up to 10cm 4 MIFARE S50 is a type of IC card which is widely used on campus and it is a RFID tag working at 13 56MHz When the FM1702SL card reader send high frequency electromagnetic waves to the IC card the LC series resonant circuit inside the card will resonates the capacitor will accumulated charge It can provide operating voltage for the card s circuit when the accumulated charge exceeds 2V Simultaneously it achieved the wireless transmission between the card reader and the infor
248. sists of resonant oscillation signal generator and a power amplifier Shown in Figure 2 Using NE555 constitute approximately SSKHZ oscillation frequency of the signal generator which provides incentives for the signal amplifier circuit Resonant Power Amplifier consists of LC parallel resonant circuit and switch Oscillation coil has a diameter of 0 50 mm enameled wire tightly wound 30 ring as required Inductance value of about 90 uH Seen from the formula l TREC When the resonance is at 55 KHZ the capacitor value of C16 is about 0 luF The resonant frequency of frequency selection circuit is the same as the frequency of the excitation signal in the power amplifiers PA resonance at this point the voltage and current in the coil reaches the maximum thereby generating maximum alternating electromagnetic field achieve the best effect of energy transfer 1 2 Design of the half bridge inverter circuit Shown on the right in Figure 2 half bridge inverter circuit half bridge circuit composed by two MOS switch When the MOS transistor Q1 turns on Q5 up current from the MOS transistor QI and go through the LC circuit to ground When the MOS transistor Q5 is turned on Q1 up the current through Q2 LC to the ground So the cycle continues direct current into alternating current by inverse in order to transmit LC circuit Using IR2104 as the driver of MOS transistor chip IR2104 is a high voltage high speed power MOSFET and IGB
249. ss performs the IC bus communication through the SCL and the SDA pin While the contents of register CTRL REG4 is edited the three dimensional acceleration measurement The micro controller range can be set and the electronic compass range can through the CRB REG M Its peripheral circuits is shown in Figure 2 MPU3050 works in 2 1V 3 6V low voltage its built in three axis gyroscope can measure the direction of 250 s 2000 s angular displacement Editing the content of its register be set register DLPF FS can choose gyroscope s working range while the micro controller read out the six axis original data of registers X OFFS USRH L Y OFFS USRH L Z OFFS USRH L through the IIC bus and its peripheral circuits is shown in Figure 3 The English Proceedings of the College of Instrumentation amp Electrical Engineering Jilin University in the Second Half of 2013 LSM303DLHC schematic Figure 2 2 3 Data storage and display module design The master micro controller which is responsible for PDR communicates with the three dimensional sensor module through the serial port they are set to the same baud rate Since the built in RAM capacity of STM32F103RBT6 is only 20KB and dead reckoning data used in the process is much larger than the amount of memory capacity the FAT32 file system is used to help the host micro controller store data into an SD card the micro controller write or read data via SPI int
250. stics In the case of the same lighting the power consumption of LED lamp is one tenth of an incandescent lamp half of a fluorescent Compared with other lighting fixtures LED lights contain no sodium mercury and other elements which will do harm to people s health and thus can protect environment to some degree 2 1 SYSTEM ARCHITECTURE In this paper the design of the full range of lighting district STC89CS5IRC controller BH1750FVI light intensity sensor module drive circuit of LED module LED intelligent system is composed of module and arc lamp shade The overall structure of the system is as shown in figure 1 The sensor module uses photosensitive diode to acquire external light intensity And the detected signal is processed by preamplifier filter and A D conversion thus there will be digital signal Through the HC protocol the digital signal will be transferred to the controlling system for processing then through the LED drive circuit we can control the number of LED lights in order to meet the general lighting requirements Light intensity sensor module Fig 1 System architecture 2 HARDWARE DESIGN The English Proceedings of the College of Instrumentation amp Electrical Engineering Jilin University in the Second Half of 2013 2 1 System Controlling Structures Controlling systems are generally divided into the closed loop control system and open loop control system In this design light
251. system of the sensor analog digital conversion module with AD7705 as the core and taking AT89C51 as the core of the main controller Acquisition system consists strain 2 1 Design of A D conversion circuit Hammer source signal has a weak signal amplitude 1s small strong electromagnetic interference low signal to noise ratio the signal frequency is low so the A D circuit shouldhave high gain high input impedance high CMRR characteristic Acquisition system usinga small hammer as simulation source using strain type pressure sensor converts the analog signal into voltage signal through the A D conversion circuit digital The A D conversion circuit using AD7705 chip it has high resolution wide Pei Li ran etc Research on wireless synchronization device in superficial seismic exploration dynamic range automatic calibration noise with 16 bitno missing codes nonlinearity of 0 00003 12 Programmable gain low power consumption and is with programmable amplifier andan on chip digital filter for 16bit sigma dela ADC AD7705 through the serial clock input chip select CS SCLK C1 18pF LI Y1 CP i 8pF 2 4576MHz instructions or datainput DIN and output DOUT conversion pin connected with the AT89C51 When the single chip microcomputer state signal DRDY output data register data is ready the MCU reads the conversion results AD7705 and MCU to connect the circuit shown in figure 3 as sh
252. t s have a look at the volt changeable power supply that provides power for the 741 amplifier The left of the circuit connect to a 220V 18V transformer It can export positive voltage and negative voltage to the amplifier Show as Figure4 Bia wae Figure4 volt changeable power supply Device 1 Three terminal regulator LM317 LM337 2 C1 C2 T 10ms 71 T2 T1 lt lt T T T2 T2 10ns 0 Vi Iodi 10 100 C C 0 Tomax 0 5A Lo 0 6A A VI 1 SV mn 3V C 2000uF C1 C2 2200uF 3 V2 J2V2 1 6V1 V mn 15V V2 13 4V Define it 18v 4 Design of rectifying elements a withstand voltage of the diode Vem 242V 2 maxx 1 1 56V 1 1 is the wave of power grid Vem 2 90V breakdown voltage is 180V b maximum current of the diode Tpav 1 2 1o max 0 25A Ir 1 8Ipav 0 454 use the 1A 200V rectifier bridge 5 SN of the transformer 111 The English Proceedings of the College of Instrumentation amp Electrical Engineering Jilin University in the Second Half of 2013 lac 1 870 max 1 08 A make it 2A 6 Cooling fin P V av Vo To P max 12 4W 7 According to the advice of LM317 make Cadi 10uF 25v C2 is the compensation capacitor of C1 C2 is 0 luF ceramic capacitor RI 240Q R2 720Q 2 2k potentiometer 2 2 3 Scheme III 1 Overall design The diagram is showed in Figure5 Use the shaking signal from the vibroswitch to link to delay circuit can
253. t is coming from the pressure Chen Changsong etc Design of Gravitational Acceleration Measuring Device Based on Balance Method sensor signal that has been amplified Then the system reads the modulus of conversion of data and data conversion and the average sum calculated to minimize the error of data 11 and eventually get the gravitational acceleration value g software flow chart is shown in figure 6 Initialization Keep watch dog opening Externa interrupt equest A D converter samples Read 6 A D channels Data conversion F n 1 6 ALgorithm amp calculation Refresh display m Refresh display g Figure 6 Software Flow Chart 3 MEASURING AND ERROR ANALYSING 3 1 Measuring 12 and Result Reduce the nonmagnetic iron ball s quality measurement by several random error caused caused by times measurement and averaging method Nonmagnetic iron ball quality is measured with scales measuring times to 10 times more is preferred Record all measurement results and sum them Then average and record it Put the nonmagnetic iron ball in regular hexahedron device horizontal measurement devices balancing system Input to the device with nonmagnetic iron ball s mass Read according to the results and for recording Choose different quality of nonmagnetic iron ball repeat the above steps 9 835 9 825 9 815 WY wD 9 805 9 795 9 785 TM mM MoOoaA he
254. ta processing module also uses a single STM32F103RBT6 chip while it is serial communicating with the three dimensional sensor module the required data of PDR is stored through the FAT32 file system in a SD card at the same time The display module uses TFTLCD ILI9320 when the pedestrian needs to view the current information of PDR the micro controller calls up the original data via the FAT32 file system from the SD card and performs PDR then the track of pedestrian will be displayed on the TFTLCD 2 HARDWARE DESIGN 2 1 Master chip and peripheral circuit design The master and the slave micro controllers both are ST s ARM _ Cortex M3 core with industrial grade control chip STM32F103RBT6 it has 72MHz clock frequency the internal ROM storage capacity of 128KB RAM memory capacity of 20KB Has eight timer counters 3 SPI 2 HC 3 UART 1 USB 1 CAN and other communication ports these ports are fully able to meet the needs in the design process The STM32F103RBT6 chip is supplied with 3 3V voltage the external power supply is 5V batteries so a buck chip AMSI1117 3 3 is adopted the output voltage can be lowered and stabilized at 3 3V with 1 accuracy 2 2 Three dimensional sensor module design The LSM303DLHC chip can work in 2 16V 3 6V low voltage the measurement range of its built in three dimensional accelerometer measurement range is 2g 16g the measurement range of of the electronic compass range can be 1 3 8 1 gau
255. tage of this scheme is it is close to the real curve of F and x Disadvantage is it s not good for the following calculation Scheme II Match on the both side of the peak F kx B 3 6 F k x B 3 7 The advantage of this scheme is it is good for the following calculation Disadvantage is there is a error with the primitive curve Now calculate Scheme II The force is showed in Figurel7 FHE FPA Figurel7 Force of the magnet E F Fa Fy FaG 3 8 Fak 3 9 117 The English Proceedings of the College of Instrumentation amp Electrical Engineering Jilin University in the Second Half of 2013 Fa m 3 10 a a 2as Vi Vo 3 11 We get 2 2 x Z Fi tR cG x gt kietke BGK i m 3 12 So G BY 2 ka tk m v 2 ky k 3 13 From formula 3 6 so G B G BY 2 kyt k m y x a Fa k ka k B 3 14 Analogy from viscous damping system C C 2v km 3 15 And formula 3 1 we get m e 2 K katk 3 16 This is the electromagnetic damping So si m KK tko 7 CO Bit yG BY 2 Katko m katk aan damping factor relation of After simplification m k k 6 aa Vx 3 18 The formula is the formula of damping factor k The difference of two schemes is the formula of Fu As to Scheme I from formula 3 5 and formula 3 11 we know De 2 FF rays ZG F Fs G yx S 2 Q p xtAe 1g G yx m
256. te count without light focusing measures Recombination LM393 dual comparator to determine infringements Its circuit design are presented in Figure 4 89 The English Proceedings of the College of Instrumentation amp Electrical Engineering Jilin University in the Second Half of 2013 Figure 4 Infrared tube detection circuit SCM system parts STC89C52 single chip small size low price high integration high performance advantages Information transmitted through the a d converter in the microcontroller system 9 the control chips in calculation analysis of transmitting digital signals to the control module sends a response signal 5 3 3 Control system design of peripheral circuit Relay driven A number of relay modules forming cell phone external buttons Six analog 5V relay key operation console access to the microcontroller pin output high and low level when output is high level transistor not conduction the relay does not work the circuit When the output low level transistor saturation breakover relay normally open contact closure circuit conduction Relay drive circuit design are presented in Figure 6 b c Relay DPST W Hz Fig 6 relay drive load circuit Counter display section Received information via mobile phone or software such as QQ mobile phone Bell which records the number of rings and rings to meet expected number can be set artificially signals can be sent to the monolithi
257. te system coordinates l Spatial bitrary point A in the source coordinate system coordinates 1s X Yy Z 1n the goal coordinate system 1s x7 yr Zr then has xz Fr FR Lr 8 In the formula R is the revolving matrix R cospcosy cosasiny stnasinBcosy sinasiny cosasinfcosy costistny cosacosy sinasinfsiny sinacosy cosastnfstry 9 sing sinacosh cosacos a B y respectively is the x y z axis rotate Angle Counterclockwise rotation for direction Application coordinates revolving may realize in the random position polygon coil the coordinates transformation substitutes into 7 then to calculate the random position the mutual inductance Above computation process 1s complex may use the MATLAB software to program and calculate 3 THE RESULTS OF CALCULATION 1 In order to test the correctness of the computing method we calculate the mutual inductance of two square coaxial parallel coils with the same size The side length of two square coils are 2ax2a the center of coil at the origin of coordinates the mutual inductance is expressed by M 93 The English Proceedings of the College of Instrumentation amp Electrical Engineering Jilin University in the Second Half of 2013 Gay ity Ge yt Tere Prater tL The expression 10 can be expressed by M Wp py dat th daH h oy ae ra uate tO unaa TVA ht vet C The espression 11 is analytic solution comparing the calculated value
258. tection angle It can start the circuit Choose sw 18020 and sw 420 But in fact sw 18020 is likely to be broken sometimes so finally choose sw 420 It is more safe and stable ee Rha MERAH Spring switch iE Ball switch Figure6 Switches Finally choose a sw 420 It has a potentiometer to change the sensitivity and a LM393 to ensure is can produce stable wave The product produces a high level when the shaking signal comes while it produces a low level when it does not feel the signal 2 The relay drived by the audion sw 420 has a large resistance the driving current is more than 10mA If put coil directly into the coil will cause the problem that it cannot have enough current so that the magnetism will too weak So it is necessary to add a audion to drive the relay in order to produce enough magnitude of current According to the theory the current in the coil should be two times than the base of the audion Choose the 1N4001 25V Jiang Ransong etc The manufacture and simulation for electromagnetical damping of fiber detector Figure7 The relay drived by the audion The circuit needs a SV power supply Add a 1000hm resistor to the base choose the s8050npm to be the audion relay has six feet 5V 3 The circuit shows the voltage of the coil In order to adjust the current better and know the state of the coil we can use a display screen to show It is measured the resistance of the coil is 64 2ohm Use AD
259. ted by people Continuous scanning vibration signals generated by vibroseis can become narrow pulse signal after dealing with the autocorrelation as shown in figure 1 finally achieving the same effect of seismic exploration with the impact source like explosive source etc 10 Existing vibroseis signal generator uses DDS chip AD9850 mostly The basic principle of DDS is based on we a a Yep 7N x Femi oc x x ee a A a os a the Nyquist sampling theorem that it collects quantitative simulation waveform signal and saves the quantitative waveform data in the memory and then finds the appropriate storage for data and converts the data into analog signal to output through DAC conversion 11 The premise that signal can be recovered is that sampling rate is 2 times greater than the signal frequency otherwise it will generate aliasing DDS principle block diagram is shown in figure 2 ee ae ae a HR ee X X SC CC Ch hc hc hh _ 4 tL a BY pes FE ll Se E EA a x ee a a ae ee i i i sss cas nin Semis sen a es mae essere me ies uses eres sent eis Ge Vi eae Sc Ss an SE ns aaa anew Sem as Gea Figure 2 DDS principle block diagram Under the control of the system clock phase accumulator use frequency control word as_ the incremental step to accumulate output the linear phase function of time and changing the frequency control word is to chang
260. ted they are relatively independent in software and hardware So it is effective to query faulty At the 52 same time each component is cheap and easy to obtain then it can decrease the cost and broader its application range In a word it has a strong marketing and it is practicality References 1 Wang Yong guo Design and Implementation of Attendance System on Fingerprint Identification D Hebei University of Science and Technology 2011 5 2 Gong Shixiong Analysis of RFID Technology and Its Applications J China Science and Technology Information 2013 03 52 53 3 Ma Jian feng Wang Li Ma Xu fei Development of Droplet Infrared Photoelectric Auto detecting Counter J Research and Exploration in Laboratory 2008 27 6 64 66 4 Lu Yao hua Shao ping Zheng Ming Wu Attendance Classroom with RFID J System for Modern Electronics Technique 2010 18 44 50 5 Zheng Jiali QIN Tuan fa Ni Guangnan Tree based backoff protocol for fast RFID tag identification J China post and telecommunications university journals 2013 20 2 37 41 6 Cheng Defu Wang Jun LING Zhenbao Wang Yanzhang Sensor principle and application M Be1jing Mechanical Industry Press 2011 7 Xing Haixia Suo Minghe Based on FM1702 RFID reader Design and Implementation J Technology Square 2007 1 202 204 8 Pan Shaoming Luo Gongkun Lao Youlan Design of RFID System Based on WSN J Instrument Technique and
261. tem System Of Steel Tape J Journal of China Jiliang University 2006 04 WangJunfeng Song Wenai Liuzhe LabVIEW Signal Processing System Based on Virtual Experiment J Foreign Electronic Measurement Technology 2006 10 Zhao Dongmei Zhangbin Labview Automatic Speed Control Stepper Motor J Micro Computer Information 2006 28 Sun Guanqun Li Xiaoqing Zhang Lisuo SR Design Of Speed Control System Of Motor J Journal Of China Jiliang University 2006 03 Chen Fangquan Li Jianzhou Ma Siwen LabVIEW Stepper Motor Drive Design And Its Application Based On J Journal of Shanghai University 2006 01 10 Yanglin Wang Xiaoguang LabView Stepper Motor Control J Electric Drive 2004 05 61 The English Proceedings of the College of Instrumentation amp Electrical Engineering Jilin University in the Second Half of 2013 The dormitory intelligent security alarm system based on GSM wireless communication JiaoLe1 Supervisor ZhaoYue WangZhengyu QiuChunling Abstract A remote alarm system has been designed which is based on GSM and improved the traditional anti theft system of intelligent localized hidden trouble It with 51 single chip microcomputer as controller and through GSM wireless communication module to our bedroom burglar alarm fire alarm temperature monitoring expensive equipment monitoring gas leakage site monitoring exception information to messages sent to the real time called on the phone This
262. the microprocessor will reduce the number of lights in the area whereas will increase the number of lights in the area as a result the indoor light intensity will be maintained in the required range for general lighting requirements Initialization Select Direction Reduce lights Increase lights Figure 7 Software system flow chart 4 TEST RESULTS Test both the experimental prototype and the ordinary lighting system for energy saving efficiency Under the same operating conditions in the same environment of power consumption for 24 hours compared with ordinary lighting system the intelligent lighting system saves about 25 30 of the electricity Detailed test results are shown in Figure 8 Power consum ption compare SU es bii ilag pia 30 jr lighting crue 00 100 2 00 3 00 4 00 5 00 6 00 7 00 2 00 9 00 10 00 11 00 14 00 15 00 i 00 17 00 18 00 19 00 00 23 00 20 00 21 00 22 12 00 13 00 Fig 8 System energy saving effect test results E The English Proceedings of the College of Instrumentation amp Electrical Engineering Jilin University in the Second Half of 2013 5 CONCLUSION This paper mainly introduces the full range of intelligent lighting control system Not only does the system accomplish real time detection of ambient light intensity but it also compensates for each other with the outside light intensity to adjust brightness automatically which will meet the intell
263. tiger Leiterschleifen Archiv fur Elektrotechnik 1981 96 Han Si yu etc Design and Realization of a Secondary Reclosing Microcomputer Device Remotely and Interactively Controlled by PC Design and Realization of a Secondary Reclosing Microcomputer Device Remotely and Interactively Controlled by PC Han Si yu Wang Yu Ma Jing College of instrumentation amp Electrical Engineering Jilin University Changchun 130001 China Abstract Traditional reclosing device have complex wiring and much auxiliary equipments It cannot achieve contact free setting and control of staff and it often malfunctions and refuses to work If the fault does not eliminate in a short time reclosing device may trip again It makes that the success rate is not high This paper designed a secondary reclosing microcomputer device remotely and interactively controlled by PC The device is based on MSP430F 149 single chip with low power consumption low cost real time display of data single chip reclosing control remotely and interactively controlled by PC and so on The device mainly consists of the power supply module the acquisition module of voltage signal single chip module relay module display module communication module PC visual interface and other components This paper describes the hardware circuit design and flow chart of the software procedure We test the installation in a lab environment it implements the single chip microcomputer r
264. tion Cis Determine whether ception is complete The wireless transmitter module Liquid crystal display dge whether trans Wssion is complate module a The computer workflow b Lower machine workflow Figure 6 software s flowchart 4 DATA OF INSTRUMENT TEST e 1 Data of o ce To TES Reference documentation 1 Li Lizhi esign of portable environment electromagnetic J 2008 1 2 Chen Jie Liang Siyang Liu Bing lt ortable electromagnetic radiation measuring instrument for electronic measurement technology J 2009 6 3 Li Qunling Wang Tuo Wang Jianzhong Analysis of the impact of electromagnetic radiation instrument measurement J 2011 6 4 Ji Yanfei Duan Huanchun high precision A D based on mincrocontroll embedded comparator J 5 Qin Huibin Hu Jianren Zheng Liang Research on electromagnetic radiation measurement method of environmental J 2007 4 6 Xu Pei electromagnetic radiation measurement J 1986 12 7 Zhao Yufeng Yu Yanhua environment electromagnetic radiation measurement technology J 1984 4 8 Zhao Liwei the detection of the electromagnetic ra oa phone etree ent D 2008 5 N a 9 Guan Denggao Sun Chuanmin electromagnetic ra diation based on the technology of virtual instrum ewa os o 7 0 PC power 1489 1321 1287 1125 supply Electrical l 1543 1100 314 test device diation pollution and electromagnetic radiation en vironmental protection R 20
265. tive resistor as the light receiving member not only improves the resolution and accuracy but also reduces the cost The experiments show that the system is suitable for domestic use low cost long range flood alarm system 6 ACKNOWLEDGEMENTS This project is supported by the Jilin University Special thanks to Ms Li Suyi of College of Instrumentation amp Electrical Engineering Jilin University for their invaluable assistance in the design suggestion The author also thanks to College of Instrumentation amp Electrical Engineering Jilin University References 1 Liu Zhigiang amp Sun Yujing Application of Sonic Detecting Technique in Regional Water Leakage Detection J WATER TECHNOLOGY 2009 3 1 47 49 2 Zhang Feng Magnetic Sub level of Design and Installation J Meter Sensor 2001 1 42 43 3 Ning Rulong Invested Diffused Silicon Level Gauge Principle J ZI DONG HUA YU YI QI YI BIAO 2000 4 51 52 4 Wang Hongbo Chen Xi Qian Lisha amp Zhou Leijiao Non contact Ultrasonic Level Measurement Method J Fujian Computer 2011 2 11 12 5 Gao Yue Refraction of Light Non contact Ype Liquid Level Monitoring Device and Use the Device Detection System China Patent CN 201600171U P Announcement Date 2010 10 16 6 Wang Weiqiang Linear CCD Level Measurement and Optical Path Design D Harbin Engineering University 2011 3 15 7 Huang Yanping Pei Li amp Jian Shuisheng De
266. tracting the brightest 43 The English Proceedings of the College of Instrumentation amp Electrical Engineering Jilin University in the Second Half of 2013 reflection point with matlab 2 2 Procedure of the experiment Experimental preparation camera the red linear laser device rotating platform including stepper motor the measured object infrared filter Software David laser scanner matlab meshlab and so on Step 1 the focal length of the camera calibration and calibration of setting the linear laser The camera and the linear axis of the laser beam into a certain angle Red laser If only a single point laser can change the path so that the light into a goblet glass column linear In mutually perpendicular two cardboard 60x30cm rectangular plate from the intermediate cut open to prepare doing the calibration process described in the two White coordinate points O O E E S a oO apa a s asia Fig 3 coordinate system Calibrating board While the object is being scanned the laser is placed on the servo The servo is installed on the bracket which is about 30cm above the lens If the laser is not high enough it can be installed on the tripod head which is placed on a tribrach with adjustable height and angle Step 2 close the linear laser open the dot or cross piece laser which is uses triangle principle of distance measurement to measure the distance between the sensor and the objects the dist
267. trol part of the whole system used to control the lifting height and the speed of the ball Unit A and B use wireless communication Unit A sends the setting information to unit B and unit B sends the real time height information to unit A The whole system design diagram is shown in figure 1 Pc ae HAD R MRE pea TAUER T OSR wu Ey Sane J i PARGRS HRMS ESLER Mh LCD ETRA HEERS Fig 1 System diagram 1 1 wireless communication module design NRF24L01 wireless module is used for wireless communication NRF24101 wireless module schematic diagram is shown in figure 2 25 The English Proceedings of the College of Instrumentation amp Electrical Engineering Jilin University in the Second Half of 2013 Fig 2 The principle diagram of the wireless module The nRF24L01 of the man machine interface A and control unit B are configured to automatically reply mode Before the data transmission we need to transmit the handshake signal The sender sends information OxAA shaking hands receiver sends reply OXBB after receive authentication information Transmission can t be performed until ensuring shaking hands successfully 1 2 lifting height control module design Adopting pneumati
268. ts trigger PC shakes hands with the lower machine through wireless and transmit the signal after shaking hands successfully The MCU of the PC will send the information it received to PC through FT232RL circuit Then the PC will handle the information and display it 14 The host computer s program flowing chart is shown in Figure 9 l 1 Students into trigger Students out trigger Fig 8 Lower computer program flow chart 4 gt start i I initial Y PC wireless module send handshake a corresponding lower machine no Lower myeBine wireless module transmits data PC wireless module receives data y Sent to the host computer processing Fig 9 Host program flow chart 4 SYSTEM TESTING Install the attendance system at the entrance of the classroom and arrange 183 students go into the classroom in turn with the card in hand 10lof the students carry his own card and other students card These 101 students check more than one card at one time when they go into the classroom The other 82 students check their own card when they go into the classroom After the test The PC software interface is shown in Figure 10 15 The System test s results and error is shown in table 2 51 The English Proceedings of the College of Instrumentation amp Electrical Engineering Jilin University in the Second Half of 2013 Tab 2 System test results and e
269. tudent pass the Li Jiaoyang etc The Design and Implementation about attendance system used in campus classroom based on RFID technology attendance system the first beam infrared sensor will be touched out Then the student comes to the part of card reader and check his card After that the second beam infrared sensor will be touched out and finish the attendance checking If one student checks more than one card the system software will automatically discover such illegal operation triggering the alarm buzzer and transmits the student s information to PC The PC s software mark these students There are six kinds of situation that will happen during the attendance checking like the Table 1 shown The lower machine s program flowing chart is shown in Figure 8 Tab 1 Attendance list ma D Start Yy initial Y Turn on the external interrupt pairs of infrare sensor receives Read the card information Judge the data Infrared sensor A Infrared sensor B Brush sheet System judge number Wireless transmitter module First After trigger After First trigger First No l l Invalid operation trigger trigger No First l l Invalid operation trigger trigger First and After Illegaloperation after and first thecorresponding trigger trigger points First and After Illegaloperation after and first thecorresponding trigger poin
270. ugh the transmission of image real time remote control of the robot observing and analyzing image information getting the position of the second accident prone improving rescue efficiency and safety Robotic system data and image information through a wireless real time transmission small size fast response practical it has a broad market prospect Key words disaster relief robot sensor system real time communication remote monitoring PREFACE GLOBAL frequent disasters in recent years has brought people s lives and property damage The most urgent thing is to search and rescue after disaster survivors trapped in the ruins How to safely and effectively to search for survivors and timely detection of relief has become a major social problem at present Post disaster complicated scene environment to the rescuers and survivors are of great security threat will hamper rescue work quickly and efficiently Using the rescue robot for auxiliary search and rescue is an effective means to solve this problem H The characteristics of the rescue robot has high flexibility and maneuverability is strong and has a good grade and obstacle capability able to adapt to field a variety of geographical environment at the same time in the process of rescue can quickly determine the position of the survivors and all kinds of changes that can detect the scene of the accident in order to prevent the secondary accident Rescue robot that can ov
271. uition friendly GUI quick and exact self adaption solver and powerful post processing function 2 It has a whole simulation design environment it can simulate force torque capacitance inductance and energy It can also draw scalar potential electric field intensity magnetic line of force field density and energy in cloud picture vector diagram or isoline 3 Powerful and flexible macros can alter the modules conveniently and has the function of parameter analysis 3 2 To simulate the force of the magnet by ansoft The initial model choose the coils diameter is about 10mm 33mm height When it comes to the simulation choose the polyhedron that has 36 surfaces The diameter is 10mm and the height is 33mm This kind of simulation ensures that they have similarity and it is simple for the software to simulate the model Then choose copper to be the material Choose the profile then apply an electric current to finish the simulation It is also OK to use a cylinder to simulate but there is a problem for the computer to work because it needs a long time to calculate maybe it could not calculate correctly Choose a cuboid that has the same size as used in the model Choose the Z coordinate to be the variable Make its moving distance is close to the real moving distance Choose the material as NdFe30 Set the parameter as its stress The fundamental model is showed in Figure 14 Figurel4 Model of damping device When finish a
272. ustry Press 1998 1 14 41 The English Proceedings of the College of Instrumentation amp Electrical Engineering Jilin University in the Second Half of 2013 A 3D scanning and laser ranging device based on Triangulation CHEN Hao HAN Xing Zhi TANG Xiang Me1 JIANG Tao The College of Instrument Science amp Electrical Engineering Jilin University Changchun 130026 China Abstract The purpose of this research is the actualization of 3D scanning to the measured object The method is a combination of triangulation and image acquisition The first step of the working Procedure is calibrating image sensor location and obtaining the distance between the objects and sensor with the principle of triangulation laser devices which driven by the servo begin to scan the object which is on a rotating platform driven by a stepper motor The camera capture point clouds data when surface of object reflect the light of laser produce a file of obj format by David laser scanner which is a aided 3D scanning software Then match the photos which is taken when there is no laser with point clouds and show them Matlab is used to extract a file of Obj format whose error points have been eliminated and save the three dimensional point clouds data vertex coordinates face vertex coordinates and etc as Mat formate files Splicing is aided by a C program after Multiple perspectives scans multiple times to the same object lastly filter out redundant data poi
273. ver the existing equipment can t be achieved with timeliness and the ability to integrate testing In order to make electromagnetic detection technology more suit life and industrial production to achieve real time detection of electromagnetic radiation and data integration The design of this electromagnetic radiation detector based on traditional detection devices increased wireless data transmission part through the nRF905 wireless transmission module data of the various monitoring points are sent to the host computer and then through the LCD display module 1 THE OVERALL DESIGN The instrument can be divided into the signal acquisition and processing and sending part the machine and the signal receiving and integrated 105 The English Proceedings of the College of Instrumentation amp Electrical Engineering Jilin University in the Second Half of 2013 part PC The machine receives electromagnetic signal through the antenna as the display sensor in the space the signal will travel through the filter circuit interference signal filtering and the processed signal is amplified by amplifying circuit Through the AD conversion module we convert electrical signals into digital signals finally through the wireless transmitting to PC PC will receive the signal with a wireless first and then through the LCD it will be displayed In general the PC part is the key of the whole instrument design jeubis SHSUDE
274. vitational acceleration in Changchun area g0 9 8066m s 2 overall relative error g8 _le 8ol 0043 Eo So 27 4 CONCLUSION Improved from the traditional balance method in order 40 to put forward regular hexahedron mechanical synthesis method and multi channel data acquisition Data transformation and processing of regular hexahedron different loading cases to figure out gravitational acceleration value in order to realize miniaturization intelligent and high precision of the Gravitational Acceleration measuring device The precision of the measuring device is 0 002 m s 2 and the relative error less than 0 043 which can be applied in the experiment teaching and scientific research In the same time provides a new reference direction for the design and improvement of the gravitational acceleration measuring device REFERENCES CITED 1 Ying F B The Surface of The Earth Acceleration of Gravity Anomaly and Application J Physics Teaching to Discuss 2010 28 12 53 54 2 Lu J S To The Outside World the Gravitational Acceleration Measurement in Our Country J China Metrology 1997 1 36 37 3 Han D A Zeng Y G Chen X L The Acceleration of Gravity Measurement System Based on Labview J Laboratory Research and Exploration 2007 26 11 33 35 4 Han Z X Xu Y Gan Z Q Using The Doppler Effect Measuring Acceleration of Gravity M Measurement and Testing Technology 2009 36 8 32 33
275. voltage is about 5V But the damping phenomenon is not obvious It can be improve by changing the turns of the coils Scheme HI use the vibroswitch and relay drived circuit 555 delay circuit and AD display circuit It finally finishes the task by feasible combination The damping force can be changed by adjusting the potentiometer Time lapse can be changed by adjusting the potentiometer of RC circuit It ranges from 0 25s The whole circuit meets the requirement of low consumption making it closer to put into use in daily life The circuit is simple and stable But in the limit of material it does not have an ideal size And in addition solution to the disturbance of weak induced voltage when the coil and the magnet have inter motion has not been thought of yet In simulation we know the relationship between the stress of the magnet and the Z axis coordinate then use the least square method to simulate We get the relationship of the force and Z coordinate Next according to the information of viscous damping we deduce some mathematical formulas towards the damping force In order to ensure the formulas are right we calculate the data of our own model The result shows the formulas are believable We can get some parameter from the optimized damping structure and can adjust the parameter of our model to make it work better Finally we set a good base of designing other parts of the fiber detector References 1 Li Xuecheng
276. with the analytic solution the distance between the two coils increases the mutual inductance decreases firstly and then increased slightly 3 Use square and regular hexagon coils as an example the side length of square coil is 4m the coordinates of regular hexagon are V3 1 0 V3 1 0 0 2 0 V3 1 0 V3 1 0 0 2 0 V3 1 0 Changing the position of the regular hexagon coil the results are shown in table 2 Table 2 Ba Mutual Lx Ly Lz m ABYC Inductance nH 0 0 10 0 0 0 29 4135 results are shown in the table 1 Table 1 2a m height calculated value analytical solution a m m H H 0 0 10 30 30 0 23 2155 13 9271 11 4541 20 0 01 1 092446x107 1 092382x107 30 60 60 0 0 10 45 60 30 0 0 10 60 30 60 24 24 aas ats In order to verify the correctness of the calculation 0 30 0 1 302506x107 1 302506x107 5 802262x10 gt 5 802262x10 According to the comparison of table 3 the results use area of equivalent method to hexagon equivalent into square calculate the side length of square coil is 3 224m calculate the mutual inductance calculated value and the analytical solution is very of two square coils and compared with the above results as shown in table 3 Table 3 approximate it indicates the computing method proposed in this paper is correct 2 The side length of two square coaxial parallel The a coils are 2mx2m the height is 1m the second coil origina
277. works using hexahedron type pressure acquisition device which overcome the problem in traditional measure that when the single side is forced the device must maintain absolute level of defects Then after signal adjusting and conversion by the A D the deivce collects resultant force 36 value For hexahedron is a kingd of symmetrical graph the size of the plane stress theory have symmetry and rotary substitution the amount of calculation and complexity of algorithm are _ reduces Finally the controller calculates the local gravitational acceleration value according to the mass quality of the object 1 DESIGN SCHEME AND ALGORITHM ANALYSIS 1 1 Design Scheme Gravitational acceleration measurement device was improved basing on the traditional balance method Put a nonmagnetic iron in hollow regular hexahedron composed of six pieces of piezoresistive sensors so six bearing surfaces form the six channels data acquisition system principle block diagram is shown in figure 1 Pressure sensor channel _ _ channel 2 channel 3 a channel 4 O uipdiues Ty Jayjonue gt a ci channel 5 unana Jaypyy dury channel 6 La Nonmagnetic iron ball Figurel Principle Block of System Pressure sensor using piezoresistive pressure sensor 5 6 1ts main principle 1s based on the piezoresistive effect namely the resistivity of solid materials will changes under the action of stress So when the feeling p
278. y domain waveform U V 4 a e f eee 0 1000 2000 3000 4000 ius Figure 8 Dual signal time domain waveform 201g Vims db 219 espns SEE S BE ES SA SOR aid Ha ai aa a E ee O 1000 2000 3000 4000 H7 Figure 9 Dual frequency domain waveform signal 0 1000 2000 3000 4000 t us Figure 10 Tri band signal time domain waveform 201g Vims db 20 a B00 3000 4000 f Hz Figure 11 Tri band signal frequency domain waveform 5 SUMMARY The paper came up with a kind of method based on the multi frequency sinusoidal signal of FPGA The paper designed and completed the system of multi frequency signal s production according to the requirement of near surface electromagnetic detection Through experiments its waveform is good and both the spectral purity and the resolution is high Based on the method it can produces low cost and high performances multi frequency sin wave and it can be applied universally When the frequency and accuracy of the output signal is required lowly we can use MCU as the master control chip 135 The English Proceedings of the College of Instrumentation amp Electrical Engineering Jilin University in the Second Half of 2013 References 1 Yu Wen Xia Verilog Digital System Design Tutorial M Beijing Beijing University of Aeronautics and Astronautics Press 2003 2 Huimin Du Yu Mou Li Quanliang Zhao Verilog based FPGA Design Xi an Xidian Univ
279. ycling and utilization of the second design of solid waste treatment technology and the national symposium on album 2007 03 01 9 Han Gaining Li Xiaolin Crescent beam Based on single chip microcomputer realization and GPRS MMS alarm system design for journal of xianyang Normal University 2010 3 25 2 10 Jing He home security burglar alarm system based on GSM network design and technology innovation Herald 2009 01 11 Dai Weiheng c 51 single chip microcomputer application design m Beijing Publishing House of electronics industry 2006 162 163 12 Wang Xiaodong Li Lihong Liu Jimin etc remote weighing data acquisition system based on GPRS j the electronic design engineering 2008 1 29 31 13 Lin Ruobo Home burglar alarm circuit design j Modern electronic technology 2001 28 8 29 30 9 The English Proceedings of the College of Instrumentation amp Electrical Engineering Jilin University in the Second Half of 2013 The calculation of mutual inductance of two polygons with multiturn coils at arbitrarily position LiuYang HeShengmin College of Instrumentation and Electrical Engineering JiLin University Abstract According to Nie Yiman formula deduced general expression of mutual inductance of two polygon coils at arbitrarily position using coordinate rotation matrix to implement the change of coil position Through the MATLAB to program and draw the curves of mutual inductance and ver
280. ysis J Journal of geophysics 2008 51 5 1551 1556 10 Lin Jun Chen Pengcheng Jiang Tao Chen Zubin Shallow seismic exploration of vibroseis signal design Progress in geophysics 2004 12 4 807 gll 11 Gao Shiyou Hu Xueshen Du Xingli etc The design of DDS signal generator based on FPGA J Journal of modern electronic technology 2009 32 16 35 to 37 35 The English Proceedings of the College of Instrumentation amp Electrical Engineering Jilin University in the Second Half of 2013 Design of Gravitational Acceleration Measuring Device Based on Balance Method Qian Chenghui Chen Changsong College of Instrumentation and Electrical Engineering Jilin University Changchun 130026 China Abstract Gravitational acceleration is of great significance in scientific research and social production There are several methods measuring gravitational acceleration such as free fall method air cushion guide method pendulum method balance method etc Devices based on these methods are large and imprecise In this paper the method is improved from traditional balance method and the arithmetic is based on Newton s second and third law The device figures out the local gravitational acceleration using a cube made up of 6 piezoresistive transducers when the quality of nonmagnetic iron ball and the force on it are kown The precision of this device reaches 0 002m s 2and the relative error is lower than 0 043 whi
281. ystem monitoring and control system the microcontroller and RF communications systems combine master and slave system consists of two parts the slave is responsible for detecting temperature and humidity and the collected data sent through the RF system host the host receives a signal sent from the slave and the PC via the serial port to communicate log data While setting the alarm data via PC upper and lower limits 2 CORE HARD WARE MODULE DESIGN 2 1 Temperature and humidity acquisition circuit design Ina multi node acquisition module temperature and humidity we mainly use DHT11 temperature and humidity sensor as a core component into Line design Sensor module using DHT11 digital temperature and humidity sensors This is a digital signal output with a calibrated temperature and humidity combined sensors application specific temperature and humidity sensor technology and digital modules capture stability and high reliability DHTI sensor using single wire serial technology with long term interface the application of simple and quick the signal transmission distance up to 20 m or more When the cable length is shorter than 20m should be used when 5kQ pullup resistor more than 20m should be based on the situation using the appropriate pull up resistors The temperature and humidity sensors with small size low power consumption fast response anti interference ability and cost advantages Detailed circuit diagra

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