Functional Specification Remote Control Snow Blower Robot
Contents
1. R42 II The boot up time for the whole system is less than 10 seconds R43 IT The robot response time for the command issued from remote controller is less than 1ms R43 I The real time image displayed on the LCD screen should be clear and fluent R44 I The robot can climb up the road with minimum 10 degree of slope 2 9 Usability Requirement R45 IT The robot should execute the commands received from remote controller However if there is safety problem robot will take safety response instead of implementing the commands from remote controller R46 I The heat output from robot will not affect its normal operation R47 I The remote control panel interface should be easy to understand R48 IT The robot operation should be easy to learn by the users without any computer background 2 10 Standards R49 IT The robot shall conform to ISO TC 184 SC2 standards R50 IT The robot shall conform to ISO 10218 safety standards a Functional Specification for Remote Control Snow Blower Robot Helper Vy a ech 3 Snow Thrower The snow thrower is part of the market product bought from Canadian Tire It has a motor and a specially designed mechanical steel fan which is able to spin the snow in and spit the snow out at desired direction 3 1 General Requirement R51 I The thrower needs be mounted on the body of an acrylic robot with the wheels R52 II The thrower must have angle of 30 45 degrees to the ground i2. The assigned number for each requirement s The priority of the requirement in the following order where I is the highest and III is the lowest Functional Specification for Remote Control Snow Blower Robot A V 2 Overall System Requirement The Snow Thrower Robot can be modeled by the following block diagram and system diagram Block Diagram Emergency Stop Button Salt Spraying Control Inputs From Remote Controller MCU On The Robot pg Processing Control Signals Snow Thrower Turns On Off Robot Wheel Motor Wireless Interface Control Real Time Video Signal Processing Figure 2 Block Diagram Automatically Pull Release Power Cord e Functional Specification for Remote Control Snow Blower Robot Helper vV Geelen ele EE ec System Diagram Top Camera 30 gg ad Driving Wheel 60 Figure 3 System Diagram This robot system can be divided into 11 sections including wheel motors motor to control the snow spitting direction the snow thrower salt spraying mechanism remote controller video processing wireless interface power switch automatically pull release power cords and body building The robot is driven by two wheels at the back with small decorative wheels in the front to decrease friction The thrower itself will be mounted on the acrylic body alone with the wheels along with two webca
3. and modules detailed test procedure is to be determined by each team and some requirement can be omitted according to the final product Still below requirements must be included and tested e The robot moving speed and direction can be controlled by the remote controller e Snow thrower can be turned on off by the remote controller e Camera direction can be controlled by the remote controller e Therobot can climb up snow road with 10 degree slope e Remote Controller can display video captured by the robot camera in real time e Robotis water proof e Robot can operate properly in snow condition or on snow ground with rain e The effective control distance is at least 100 meters e Emergency stop button can terminate the robot operation immediately e All safety requirements listed in this document After all the robot needs to be tested by naive user Failure testing is also required in order to investigate the consequence of any improper usage of the device If any serious consequence is observed modification on the robot system to prevent or mitigate the consequence is required 10 Conclusion The functional specification of our robot is clearly described in detail in this document All or most of the requirements listed in this document with and II priority are expected to be completed in the proof of concept model Also the model is expected to be fully tested and completed by the end of March 20 e Functional Specifica
4. thrower alone shall not exceed 1080 Watt 120V 60 Hz 9A R17 II The power supply unit on the robot is used to distribute and regulate power to each module of the robot except for the snow thrower which connects to the power cord directly R18 I The power supply unit shall draw maximum of 600 Watt of power from the power cord R19 I The two DC geared motors driving the wheels of the robot shall not draw more than 480 Watt of power from the power supply unit on the robot 12V 20A maximum each R20 I The power drawn by the rest of the components on the robot such as stepper motors microcontrollers control circuits and cameras shall not exceed 120 Watt 2 4 Mechanical Requirement R21 I The speed and direction of motors for the wheels can be controlled by the remote controller R22 I The direction and location of motors for camera snow output direction and power cord should also be controlled by the remote controller R23 I The camera should be able to rotate freely by the remote control R24 I The robot is 2 wheel drive by 2 DC geared motors and with small wheels on the front to decrease friction R25 I The body which supports the snow thrower is built by customized acrylic boards R26 I The remote controller should be user friendly PS2 buttons and joystick R27 I The mechanical components should be visually well hidden inside the robot Functional Specification for Remote Control Snow Blower Robo
5. two motors and wheels must be precise so that the robot will be moving in a straight manner when desired R62 I Traction of the wheel must be accomplished by using slipping proof material on the surface of the two rubber wheels such that the robot can move in the snow or on the ice 4 2 Physical Requirement R63 III The direction control circuits are implemented by two H bridges which can handle at least 360 Watt of power rating and 20 A of current R64 II Torque produced by the two motors should sum up to at least 13 54 Nm R65 II When the direction of motor rotation is switched by the operator the motor should come to a stop or slow down for at least five seconds without drawing any current in order to reduce the inertia and possible heating up of motor and control circuit R66 III The two rubber wheels are 20 32 cm in diameters each 10 a Functional Specification for Remote Control Snow Blower Robot Helper vy i ech 5 Vision detection This section aims to define the functional specification of camera modules Camera modules will be used to capture the real time images and to send the image data to the MCU in the robot 5 1 General Requirement R67 II Three Cameras are used to obtain the environment information around the robot R68 I Camera is used to capture the real time images around the robot The video from this camera will be mainly used for user to control the movement of the robot R69 IT C
6. Helper Tech HelperTech School of Engineering Science Burnaby BC V5A 1S6 February 14 2010 Dr Andrew Rawicz School of Engineering Science Simon Fraser University 8888 University Drive Burnaby BC VSA 1S6 Re ENSC 305 440 Functional Specification for Remote Control Snow Blower Robot Dear Dr Rawicz The enclosed document clearly describes the functional specification of our developing snow blower robot RoboBlow which is a wireless remote control robot for snow removal Our proposed robot will provide the utility of snow removal without the necessity of going outdoors in person The main functionality of the robot will include salt spraying snow throwing and real time video transmission from the robot to the remote controller The attached functional specification document outlines various requirements and consideration for the robot system and functionality It also briefly describes our safety consideration and the test plan of the robot HelperTech is a research team found by four talented and innovative senior engineering students Leo Cheng Peter Hsiao Joseph Shen and Yu Yuan Liu If there are any questions or concerns regarding our proposal please feel free to contact me by phone or by email Sincerely Leo Cheng President and CEO HelperTech Phone 604 760 1283 Email hpc5 sfu ca Enclosure Functional Specification for Remote Control Snow Blower Robot Functional Specification PLA eme Remote Cont
7. amera 2 is used to monitor the snow blower working situation The video from this camera will be used for user to check if the snow blower works normally R70 II Camera 3 is used to see the snow out direction The video from this camera will be used when user adjusts the snow out direction 5 2 Physical Requirement R71 I All the cameras need to be protected by transparent covers R72 I A motor needs to be installed under the camera 1 to provide the possibility of camera rotation 5 3 Electrical Requirement R73 II All the cameras will be powered by USB plug on the MCU development board 11 a Functional Specification for Remote Control Snow Blower Robot Helper Vy Ho ech 5 4 Usability Requirement R74 II In order to keep the good image quality in dark environment the robot needs to have lighting equipments R75 II When the environment is getting dark the lighting equipment can be switched on automatically R76 I Camera 1 can be rotated 360 degrees 6 Power Cord Control The robot has the feature of pulling releasing the power cord automatically by the change of distance from the robot to the power supply This feature is implemented for e Unnecessary mess of wires curling together e Add convenience for the user to clean up after using 6 1 General Requirement R77 II The power cord is attached to a stepper motor powered by low DC current R78 IT An IR sensor is used to detect the dista
8. bot can only receive the signals emitted from the remote controller R138 I Control system in the robot can process the different commands issued by the remote controller and send the right control signals to the robot R139 T Control system in the robot can receive the data from cameras and send the image data to the remote controller R140 IT The main part of the control system MCU with development board in the robot will be powered by 5 volts voltage source inside the robot 18 e Functional Specification for Remote Control Snow Blower Robot Helper ia ech 7 12 Emergency Mode amp Safety Requirement R141 I The emergency LED on by satisfying either condition in the following 1 The robot detects some safety issues and automatically applies the corresponding strategies 2 The robot cannot send receive signals to from the remote controller R142 I There should be an emergency stop button on the controller R143 I There should be an emergency stop button on the robot 8 User Documentation Requirement R144 IH A user manual with all the operating instructions safety warnings general specifications and proper installation instructions will be provided to the end users in order to correctly operate RoboBlow R145 III The user manual should be written in English French German Traditional Chinese Simplified Chinese Korean Japenese R146 I A website providing the descriptions of RoboBlow and brief techn
9. ecific requirements to accomplish above functionality are listed in this document e Functional Specification fe emote Control Snow Blower Rob Helper Functional Specification for Remote Control Snow Blower Robot e ge ech Table of Contents Exec tiv SUMMA y EE ii List of AUG ER EE OE N E RE R R E vi elle AE OE E vii RT vae Plae le EE EE EE ER EE RE EE EE ends 1 ES Wee E 1 Moe ie RE C EE ER EE EE EE EE S 1 Petite Le c ET 2 2 Overall System ReduiremenNt ees Ee Ee AA EA EE ER ER AA AA ER Ee RA AA EE Ge ede ee ee AE Ee Ee de ee ee nnn 3 2 1 General Requirement ect RR ee Re rosaceo peo hes Voed se ee ee ee Ee good ae ee ee Gee ee 5 2 2 Physical REQUIFEMENE EEN 5 2 3 Electrical R duirement EE Kees Ee SES Re SEGE SES Red Ges GE Red EES Eed ESEG GESE Red Ges GER ee Ges RR ee ede 6 2 4 Mechanical Requirement sees se Ee ER RA SA ee Ee ed ee ee enne Ee de de nass esent tasa ee ee ee 6 2 5 Environmental REQUIFEMENE s ees sede Reed RE Ke de Ee Ee Ge ee De Dee anexo dk ER Even RE Eed RE RE 7 2 6 Reliability and Durability sesse ees ER ee EE ER RA AA ee Ee Re de ee ee ee Ee Ee ee de ee ee Ee Ee Re ee ee nns 7 MRT ed DI OE EE RE EE EE RE 7 2 8 Performance Requirement EE Ee ES GERS ete e Ee Gee Reed Res GE Y Ve cede Ve gos 8 2 9 Usability Requiremernt TEE 8 picco 8 3 SNOW MICE Dm 9 3 1 General Requirernent EE Ee caeca edes ech ade idee cuis ee bae dEr 9 3 2 Physical Require
10. ical specification might be developed for potential customers and vendors R147 IH A shipping instruction will be provided to carriers that will transport the Roboblow in order to prevent any damage during shipping 9 Test Plan The robot will be tested in separate modules individually by the software team and the hardware team during development stage where the software team is responsible for the control system and the hardware team is responsible for the electric circuits and the robot mechanism During development stage the teams should test the requirements related to their responsible field with the best of their ability whenever a specific task or module is completed and the testing of the requirement is possible After all modules are tested the overall system will be integrated and tested in walkway in normal condition and then the robot will be bring to real snow environment for final 19 e Functional Specification for Remote Control Snow Blower Robot Helper af M M 2 testing and adjustment The robot is designed to meet all functionality requirements listed in this document and thus all requirements listed in this document should be tested However as requirements may vary during development stage and the test procedure can vary by different design
11. low Joystick Figure 7 Robot movement when joystick is pushed backward R97 I When joystick is pushed to forward left the moving direction of the robot is along the 135 degree of x axis te Robot Direction RoboBlow Joystick Figure 8 Robot movement when joystick is pushed forward left 15 Functional Specification for Remote Control Snow Blower Robot Helper Vy oo ech 7 4 Power Control Requirement R98 I Button 0 is the power switch of the remote controller R99 T LED 0 is the status indicator LED for button 0 R100 I If button 0 is pressed while the remote controller is switched off the remote controller will be switched on and LED 0 is lighted R101 I If button 0 is pressed while the remote controller is switched off the remote controller will be switched off and LED 0 is off 7 5 Speed Control Requirement R102 IT Button 1 button2 and button 3 are the speed control buttons of the robot and a seven segment display is associated with these buttons R103 IT If 0 is displayed on the seven segment display it means the average speed of the robot is zero R104 IT If 1 is displayed on the seven segment display it means the average speed of the robot is 0 1 m s R105 II If 2 is displayed on the seven segment display it means the average speed of the robot is 0 15m s R106 II If 3 is displayed on the seven segment display it means the average speed of the robot is 0 20m s R107 II If butto
12. m cameras and the salt spraying unit The user sends input signals from the remote controller to the MCU on the robot through wireless interface The MCU in the robot processes the signals and sends processed signals to the control circuits to control the robot The cameras on the robot send data to the MCU on the robot which processes the real time image and sends back to the user LCD by wireless interface For convenience purpose and to solve the messed up cord problem the robot has a Functional Specification for Remote Control Snow Blower Robot Helper ect feature which can pull release the power cord depending on the distance from the wall plug This allows the user to save time from dealing with knotted cords and prevent disconnection The emergency button on the robot allows people walk by the robot to stop the robot when emergency happens When the robot is operating the user can turn on off the snow thrower as desired when the robot moves around The user can get a clear view of real time environment by looking at a LCD screen in the controller The user can also choose the direction of the snow spitting direction through the remote controller and can also control the spaying unit to spray salt along the road 2 1 General Requirement R1 I The position and the direction of the robot are controlled by the user through the remote controller R2 I The snow thrower can be switched on off by the user through the re
13. ment Ed nete end t 9 Functional Specification for Remote Control Snow Blower Robot Helper v Ay Robot Speed and DireEtON EER canes REG gen dees Bes a Ke Gee Be gede ad NEE ee Be Gede Ee 10 4 1 General Requirement iese se se ee EE ER ER AA AA AE Ee Ee AA ee AA EE Ge Ee de ee saisis Ee ede sans ee ee ee 10 SALT IT E 10 TE N aei 11 5 1 General Requirement 2 5 2 2 056 rates cosas etes nnion Ee eaaet REENEN EES 11 5 2 Physical Reguirerment ue ENEE 11 5 3 Electrical Requiremient OE EG 11 5 4 Usability Requirement rotos eret iret eee eov seed sod edere vig eva sa Ge REN XV evade Ra eke Ee 12 6 Power Cord COMO ee 12 6 1 General Reguirement iss se se ee EE Ee RA AA EE Ee RA nnns esent RR de ee ee snis set Re sais sss ense nias ee 12 6 2 Physical Requirement sis se se ee EE Ee ER AA AG EE Ee RA ee AA ER Ee ER de nass insi Ee Ee Re de ee ee Ee seria de ee 12 7 Remote control systern EE 13 RR ETH Te TEE 13 KHMER E EE 13 7 3 Direction Control Requirement esses eene enne nn nennt anis asse entia annis 14 7 4 Power Control Reoutrement eene nennen enne Ee RA assis ee tia de ee ee Ee Ee Re sanis 16 7 5 Speed Control Requirement EI peret bri n ebrei ae dort 16 7 6 Salt Spraying Control REQUIFEMENE eene nn nasse neni inna ee 17 7 7 Camera Control Requirement nennen enne nennen nennt Re de inanes sese Ee annis 17 7 7 1 Camera on state Reouirement
14. mote controller R3 I There are cameras on the robot to capture the environment information R4 I The remote controller should be able to receive the real time images from the cameras on the robot and display these images on LCD monitors embedded in the remote controller R5 I The salt spraying unit on the robot can be switch on off by the user through the remote controller R6 II The power cord automation unit should automatically release or pull back the power extension cord from the wall socket R7 II The robot and remote controller should not cost more than 2000 CDN 2 2 Physical Requirement R 8 II The width of the robot shall not exceed 50 cm R9 II The length of the robot shall not exceed 60 cm R10 IT The height of the robot shall not exceed 40 cm R11 II The weight of the robot shall not exceed 40 Kg R12 IT The maximum height of the snow intake shall be less than 15 cm R13 I The robot shall have enough traction so it can move in the snow or on the ice Functional Specification for Remote Control Snow Blower Robot Helper V Ho ech 2 3 Electrical Requirement R14 IT The power extension cord shall be connected to ordinary external wall socket 110V 120V at 60Hz in order to provide power supply to the robot R15 II The total amount of power drawn by the robot from ordinary external wall socket 110V 120V at 60Hz shall not exceed 1700 Watt R16 IT The maximum power drawn by the snow
15. n 1 is pressed the speed will be increased by one level R108 II If the speed has already been in the highest level pressing button 1 should not change the speed level R109 II If button 2 is pressed the speed will be decreased by one level R110 IT If the speed is zero already pressing button 2 will still keep the zero speed R111 II If button 3 is pressed the robot will stop immediately no matter how fast the robot is moving before 16 e Functional Specification for Remote Control Snow Blower Robot Helper Vy ech 7 6 Salt Spraying Control Requirement R112 I Button 4 is the switch of salt spraying R113 I LED 4 is the status indicator of the salt spraying R114 I if button 4 is pressed while salt spraying is off and the LED 1 is off the salt spraying function will be switched on and LED 1 will emit light R115 I if button 4 is pressed while the salt spraying function and LED 1 are both on the salt spraying function will be turned off and LED 1 will be turned off also 7 7 Camera Control Requirement R116 I There are two states for camera control on state and off state R117 I Button 5 is the switch of the camera control R118 I LED 5 is the status indicator of the camera control 7 7 1 Camera on state Requirement R119 I LED 5 emits light R120 I LCD screen displays the real time image captured from the cameras on the robot R121 I By pressing button 6 and 7 cameras can be
16. n order to spin the snow properly R53 II The noise produced by the thrower should be minimized R54 II The thrower should be directly plugged in extension cord to the wall plug 3 2 Physical Requirement The following criteria of the snow thrower is prescribed by Canadian Tire website R55 IT 16 41 cm clearing width and 6 15 cm intake height R56 II 14 36 cm plastic impeller gathers and expels snow through 180 directional chute R57 II Discharges snow up to 25 7 6 m R58 IT Draws power of 108 Watts and 9A of DC current R59 IT Weighs about 24 Ibs um Functional Specification for Remote Control Snow Blower Robot Helper Vy eo ech 4 Robot Speed and Direction The robot speed and direction module includes two DC geared motors two rubber wheels and two motor direction control circuits This module is responsible for e driving the robot to desired position and orientation e pushing the thrower into the snow in order to remove the snow While the direction of the motor rotation robot orientation is controlled by direction control circuit which takes input from the microcontroller embedded in the robot The speed of the robot can be adjusted by using the pulse width modulation signal from the microcontroller 4 1 General Requirement R60 IT 34 1 gear ratio is needed in the DC geared motor in order to reduce the speed of rotation and to transform it with higher torque R61 I The alignment of the
17. nce from the cord to the robot and the wall plug R79 II When the robot gets far away from the wall plug the motor will spin to release the power cord and vice versa 6 2 Physical Requirement R80 IT The power cord is 6 feet long R81 IT The cord is maximum 1 5 kilogram R82 IT The motor must have torque more than 15 N ft in order to deal with the cord properly 12 eM Functional Specification for Remote Control Snow Blower Robot Helper Vy ech 7 Remote control system With our system user can control the RoboBlow without directly watching it The real time images captured by cameras on the robot and displayed on the LCD screen of the control panel will assist users to control the robot 7 1 General Requirement R83 I The robot can be fully controlled by remote controller wirelessly R84 T The control system of the robot will use two ARM9 development boards MCUs one in the remote controller and one in the robot R85 IT Both MCUs operates in Linux OS 7 2 Physical Requirement R86 IT The size of the remote controller will be 215 9 mm x 279 4 mm R87 T The weight of the remote controller will be less than 1 kg R88 IT The remote controller will be powered by 5 volts DC battery R89 T The robot is a real time system Any command issued from the remote controller must be implemented by the robot as soon as possible R90 IT The use
18. r interface of the remote controller will consists of one joystick 8 buttons 5 LEDs and one 5 6 inches LCD screen R91 I All the buttons on the control panel should be easy to access The button and joystick distributions should by intuitive and easy to use Robot Status Monitor LCD Buttons Switches and LEDs Robot Direction Control Joystick Figure 4 Remote controller layout 13 e Functional Specification for Remote Control Snow Blower Robot Helper V ech 7 3 Direction Control Requirement R92 I Joystick is designed to control the moving direction of the robot R93 I Robot should move toward the direction where the joystick is pushed R94 I When joystick is pushed forward the moving direction of the robot is along the positive direction of y axis T Robot Direction RoboBlow Joystick Figure 5 Robot movement when joystick is pushed forward R95 I When joystick is pushed forward right the moving direction of the robot is along the 45 degree of x axis T Robot Direction RoboBlow Joystick Figure 6 Robot movement when joystick is pushed forward right 14 e Functional Specification for Remote Control Snow Blower Robot Helper E L tsee 7 ec R96 I When joystick is pushed backward the moving direction of the robot is along the negative direction of y axis dd Ro bot Direction RoboB
19. rol Snow Blower Robot Spring 2011 Submitted to Andrew Rawicz ENSC 440 Michael Sjoerdsma ENSC 305 Project Team Leo Cheng 301084573 Peter Hsiao 301025638 YuYuan Liu 301046236 Joseph Shen 301032167 eM Functional Specification for Remote Control Snow Blower Robot Helper wv fect Executive Summary Despite the well developed snow removal tools in the market each year a considerable amount of injuries and heart failures are resulted in snow removal for the hard exercise in the slippery and hazardous environment In order to protect people and provide the most comfort to people for snow removal HelpTech is developing a robot for snow removal such that our robot users can stay in the house while the robot is cleaning snow outdoors Our proposed robot is called RoboBlow which will have the following modules and functionality e Snow Thrower Module e Salt Spraying Unit e Snow Out Direction Control Speed and Direction Control Camera Direction Control e Wireless Remote Control e Real time Video Transmission From the robot to the controller As with these modules and functionality the robot users can control the robot to clean snow with a wireless robot controller The robot will have the full utility for snow removal and also provide the utility of remote control without looking the actual robot as the robot working condition can be monitored through the robot controller More detailed and sp
20. rotated to capture images from different angles 7 7 2 Camera off state Requirement R122 I LED 5 is off R123 I LCD screen does not display images captured from cameras on the robot R124 I Camera does not rotate even if button 6 or 7 is pressed 17 e Functional Specification for Remote Control Snow Blower Robot Helper vy ech 7 8 Snow Blower Control Requirement R125 I Button 6 is the switch of snow blower R126 I LED 6 is the status indicator of the snow blower R127 I Snow blower motor can be switched on and off by pressing button 6 R128 I When snow blower is on the LED 6 emits lights R129 I When snow blower is off the LED 6 is off 7 9 Snow Out Control Requirement R130 IT Button 7 and 8 can control the snow out direction R131 IT When either button is pressed the LCD screen will be automatically switched to the view of the camera that monitors the snow out direction R132 IT Pressing button 7 rotates snow out direction CW R133 IT Pressing button 8 rotates snow out direction CCW 7 10 Wireless Communication Requirements R134 I Wireless communication protocol is IEEE 802 11 R135 I The communication 1s bidirectional In other words both remote controller and robot can send receive the data to from each other R136 I The effective control distance is 100 200 meters depending on the environment condition 7 11 Control System in the Robot R137 I Control system in the ro
21. seen enne Re ee AR Ke ee AR ee ee dans sona 17 7 7 2 Camera off state RedguiremenNE ees ee ese ee ee Re ee Ke ee Re ee AR Re ee AR Re ee ee ee ee naa 17 7 8 Snow Blower Control Redguirement sees sesse Ee Re AA ER Ee RA AA ee Ee Re de ee ee enne Ee nnn ee 18 7 9 Snow Out Control Reduirement sees ese ee SR RA GR AR AA Ge ee ee ee ee ee 18 7 10 Wireless Communication Requirements se se ee ER Ee RA AA Ee EE Ee Re AA ee Ee Ee ee ee 18 7 11 Control System in the Robot iese se ee AE ER RA AA ER Ee RA AA ee Ee Re de ee snis ee Re Re ee ee 18 Functional Specification for Remote Control Snow Blower Robot 7 12 Emergency Mode amp Safety Requirement 19 8 User Documentation Requirement esent nnne ed ee Ge Ad nennen 19 MEE OT mM 19 hemel ee OA 20 1T Ee 21 e Functional Specification for Remote Control Snow Blower Robot Helper vy ech List of Figures Figure 1 A seven segment display 1 vii Figure 2 Block Diagram 3 Figure 3 System Diagram 4 Figure 4 Remote controller layout 13 Figure 5 Robot movement when joystick is pushed forward 14 Figure 6 Robot movement when joystick is pushed right 14 Figure 7 Robot movement when joystick is pushed backward 15 Figure 8 Robot movement when joystick is pushed left 15 vi Functional Specification for Remote Control Snow Blower Robot i Hel w V ec Glo
22. ssary LCD Liquid Crystal Display a flat electronic visual display Snow Intake The amount of snow that the snow thrower can handle at a given moment H bridge A well know electronic circuit used to control motor rotation direction ARM9 The version 9 ARM CPU ARM is a global leading company for designing embedded system processor ARMO is one of their product models MCU Micro controller It is a small computer on a single IC containing a processor memory and programmable I O 2 It is usually used in automatically controlled products and devices Seven segment Please refer to the figure below display Figure 1 A seven segment display 1 IEEE 802 11 It is a set of standards carrying out wireless local area network computer communication in the 2 4 3 6 and 5 GHz 1 vii Functional S ecification or Remote Control Snow Blower Robot Helper WW ect 1 Introduction RoboBlow is a remote controlled snow thrower robot This task oriented robot enables its operator to remove the snow and prevent ice formation on walkways or driveways while staying inside his her home Through the remote controller the operator is able to move RoboBlow in any direction with desirable speeds The operator can also turn on the snow thrower when it reaches a job site and turn off the snow thrower while the robot is travelling There is also a salt spraying unit on the robot that can be switched on off by using the remote controller The req
23. t Helper Vy oe ech 2 5 Environmental Requirement R28 I The robot shall be operated under snow condition slippery road cold weather 30 C 20 C R29 I The robot shall be waterproof R30 I The robot shall have safety mechanism to prevent from hurting people passing by R31 III The robot should have mechanism to reduce the operating noise 2 6 Reliability and Durability R32 I The bottom part of the robot is water proof R33 I The remote controller is resistant to breakage under normal operating conditions R34 III The robot can be continuously working for at least 3 days R35 III The robot will be closed automatically if no command received for 1 hour R36 IT The MTBF mean time between failures of the robot is no less than 8000 hours R37 II The MTTR mean time to repair of the robot is no less than 15000 hours 2 7 Safety Requirement R38 I If for some reason the connection between remote controller and robot is broken the power of the robot will be cut off immediately R39 I The electronic and mechanical components should be enclosed R40 IT The robot can detect the objects other than snow that are approaching to it and warn the user R41 IT When objects other than snow are very close to the snow thrower the robot will shut down the snow thrower engine automatically a Functional Specification for Remote Control Snow Blower Robot Helper Vy oo ech 2 8 Performance Requirement
24. tion for Remote Control Snow Blower Robot Helper V Ho ech 11 References 1 En Wikipedia org IEEE 802 11 Online Available http en wikipedia org wiki IEEE 802 11 Accessed Feb 14th 2011 2 En Wikipedia org Microcontroller Online Available http en wikipedia org wiki Microcontroller Accessed Feb 14th 2011 3 Arm com The Architecture of the Digital World Online Avaliable http www arm com index php Accessed Feb 14th 2011 4 Snow thrower Yardworks 9A 16 in Electric Snow Thrower operation manual 5 Driving Motor Online Available http www npcrobotics com products viewprod asp prod 40 amp cat 20 amp mode gfx Accessed Feb 14th 2011 6 Driving Wheel Online Available http www npcrobotics com products viewprod asp prod 46 amp cat 22 amp mode gfx Accessed Feb 14th 2011 21
25. uirements of this robotic system are proposed by HelperTech Inc and will be discussed in depth throughout this document 1 1 Scope The scope of this document mainly focuses on the functional requirements and specifications of our product The document will first go through the system requirement where an overview of the entire system is briefly introduced Secondly the detailed requirements and the functional goals of every module will be discussed in each section Next the plans of composing different types of user documentation will be discussed Finally a conclusion will be provided to summarize our functional specification 1 2 Audience The purpose of this documentation is to ensure that the expected functional requirements by the company executives are met It serves as a general guideline for the project managers to accomplish each module of the project Also this document provides the design engineers with the necessary information to carry out the actual implementation of each module and how each component should be integrated Lastly the test plan indicated by this documentation shall bring the test engineers with the necessary instructions to execute the test cases indicated e Functional Specification for Remote Control Snow Blower Robot Helper vV ee ee eee Eten ec 1 3 Classification The following convection is used throughout this documentation Rn s A function requirement R Stands for Requirement n
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