DTMS User Manual - Boxboro Systems
Contents
1. A DTMS Fitting Spreadsheet is available from Boxboro Systems The spreadsheet allows you to enter the expected worst case deformation of your structure and then select the number of segments and length of each segment that are required to ensure that an extreme deformation can be measured 43 Appendix 2 DTMS Specifications Table 2 1 lists the maximum measurement ranges and other specifications for the DTMS Model 47 A simple estimate of the maximum deflection D that can be measured at the end of a multi segment DTMS system is D single segment range x number of segments As shown in Table 2 1 the DTMS Model 47 has a maximum Y or Z axis measurement range of 23 5 mm or 0 to 47 mm For a 10 segment string the maximum deflection at the end of the string is approximately D 23 5 x 100 2350 mm For bending in only one direction the maximum deflection is twice as large D 4700 mm 44 Table 2 1 DTMS Model 47 specifications 47 x 47 mm 1 85x 1 85 inch Half segment or full segment maximum measurement range 23 5 mm 0 925 inch Y or Z direction or O to 47 mm orO to 1 85 inch Frequency response up to 100 Hz Maximum twist about X per segment i 35 degrees Maximum twist about Y or Z f depends on segment length 4 feet Half segment worst case twist error 0 1 degree Multi segment worst case deflection error Y or Z i 1 1 x N 0 0433 x N versus number of segments N 0 5 mm 0 01972. 14 4 Three D Plot Controls When viewing a 3 D plot during collection or playback you can set the maximum and minimum values for the Y and Z axis scales by using the numerical boxes labeled Y Scale max min and Z Scale max min Enter your desired scale values into the boxes The program stores these values 36 in the default initialization file The X axis scaling for the plot is determined automatically by summing the segment lengths from the configuration You can rotate the 3 D plot by clicking on the plot with your Left mouse button and holding the button down while dragging the plot You can zoom or shrink the plot using the scroll wheel on your mouse The Reset 3 D button re sizes and re orients the 3 D plot back to its original view When re playing data as a 3 D plot the Data Acquisition screen shows Rewind and Pause Go buttons below the plot During data collection these buttons are hidden Also below the plot 1s a Time box that displays the number of seconds since the file started playback The Pause button pauses the plot display at the current time and the button label changes to Go Clicking on the Go button will resume data playback The Rewind button re starts playing back the data at time 0 14 5 Chart Recorder Plot Controls When using a strip chart recorder plot during acquisition Figure 19 above the left hand axis shows Y and Z deflections mm and the right hand axis shows twist angles in degrees The plot s
3. Outbound and Inbound refer to the directions toward which the lasers are pointing 3 Enter the length of each segment 4 Select the sample rate that you want in the second drop down box above the table Sample Rate Hz The maximum sample rate depends primarily on the communication baud rate However at high baud rates with a small number of segments the integration times of the CCD sensors can have an effect So until the program 1s connected to the DTMS system and the CCD integration times are configured the maximum sample rate 1s set based on the baud rate and a maximum integration time of 15 When the system 1s zeroed see section 11 2 below the maximum sample rate will be re calculated If the maximum sample rate 1s less than your selected sample rate the sample rate will be re set to the maximum With the DTMS powered up and connected to the USB to RS485 adaptor the next step 1s to connect to the DTMS system Click on the Connect to DTMS button on the configuration screen The program then communicates with each board set up in the configuration If any of the boards fail to communicate an error message 1s displayed If all boards communicate properly the Connected to DTMS light on the upper left side of the screen lights up 11 2 Zeroing the System The first time you configure a DTMS system you need to adjust the signal strength for each laser sensor array pair section 12 0 Signal Strength Scree
4. N Top Sensor Offset pixels 1000 O Z O 34 N Right Sensor Offset pixels 1000 Z Z 1 1 35 N Bottom Sensor Offset pixels 1000 Z 2G O 36 N Left Sensor Offset pixels 1000 1 1 1 1 37 N Reserved gt 38 N _ Reseved gt O 39 N Pressure Temperature Chip Installed o Z o 20 INT Board Serial Number O 41 N Pixels per sensor chip always 768 fr now 1 1 42 N Pixels DPI always 400 for now 1 1 1 O 100 867 Pixel brightness data for analog sensor scan data When user sets coils 3 through 6 for an analog scan the data is placed in these registers Register 100 has pixel 0 data Register 867 has pixel 767 data Right and Bottom sensor pixel numbers must be reversed because they are mounted the opposite way VIDBWIN lt lt lt lt lt lt Ziz Z ax e oO N Z ZZZ ZI eiu ZI ZI Z Z Z ZI Z Z Z Z Z Z ZI ZI zz 22222 2 2 than the Top and Left sensors For crossing data registers 18 and 19 subtract the register from 7670 For pixels above threshold data registers 23 26 subtract the register value from 767 48
5. 0 065 inch 1 7 mm through 0 230 inch 5 8 mm Other PG7 thread cord grips are available for larger diameter cables Figure 8 shows the wiring for a module with only one board installed which 1s used at the beginning of a string of modules Figure 9 shows the wiring of a module in the middle of the string Figure 10 shows the B amp B USB to RS485 converter and a Tenma power supply wired to the DTMS communication and power bus cable 13 Figure 8 Module wiring beginning of string 14 Figure 9 Module wiring mid string 15 Figure 10 B amp B converter and power supply B KI BaB ELECTRONICS a 120 OHM 2 TWISTED PAIR SHIELDED CABLE D WHITE POWER RED POWER BLACK SHIELD 7 1 RS485 Termination Resistors A 120 ohm termination resistor should be placed at the ends of a long string of DTMS modules The termination resistors are connected from Transmit Receive marked on the board as D to Transmit Receive marked as D Typically these termination resistors are placed at the RS485 converter and at the last module in the string of DTMS modules Termination resistors might not be needed with shorter cable lengths or slower communication speeds 7 2 DC Power Supply The DTMS runs on a range of 12 to 48 VDC Power draw is a maximum of 3 Watts per DTMS board laser combination A five segment system will have 10 boards and lasers for a maximum power draw of 30 Watts The DT
6. 11 N Input Voltage after protection diode in Volts 100 Temperature in degrees C 10 If pressure temperature chip is installed see register 39 if chip is not installed it will report O Internal Pressure in PSI 100 If pressure temperature chip is installed see register 39 if chip is not installed it will report O 14 N reserved J 00 O 15 N reserved J 0 0 O 16 N FirmwareCodeVersin_______________ 17 N TopSensorCrossing Position 10 0t07670 18 N Right Sensor Crossing Position 10 0t07670 _______ _ 19 N Bottom Sensor Crossing Position 10 O to 7670 20 N Left Sensor Crossing Position 10 O to 7670 1 1 o 1 21 N Top Sensor first pixel above threshold 0 767 1 1 22 N Top Sensor last pixel above threshold 0 767 23 N Right Sensor first pixel above threshold 0 767 1 24 N Right Sensor last pixel above threshold 0 767 25 N Bottom Sensor first pixel above threshold 0 767 1 26 N Bottom Sensor last pixel above threshold 0 767 1 27 N LeftSensor first pixel above threshold 0 767 1 1 28 N Left Sensor last pixel above threshold 0 767 1 1 29 N Dimension D1 forthe sensor array mm 1 30 N DimensionD2forthesensorarray mm 31 N Dimension D3 for the sensorarray mm 32 N DimensionD4forthesensorarray mm 33
7. also be rotated for better alignment 5 1 Installing Optional Pipe Between Modules If the DTMS system is installed where bright sunlight can overload the sensors or where blowing rain dust or other debris can block the optical path between modules the optical path is protected by mounting plastic pipe between the modules We recommend using lightweight 4 inch 10 cm HDPE triple wall drain pipe which has a non reflective black internal lining and is available at building supply stores in 10 foot 3 meter lengths The drain pipe should be secured to the structure to keep it from bending and blocking the optical path between modules The pipe is connected to the DTMS modules using standard rubber couplings as shown in Figure 4 The aluminum pipe on the ends of the DTMS modules is 4 inches 10 cm in diameter The HDPE drain pipe 1s 4 215 inches in diameter 10 71 cm Standard 4 inch rubber pipe couplings such as the FERNCO 1056 44 will accept pipe diameters from 4 to 4 65 inches 10 to 11 8 cm Figure 4 Triple wall drain pipe installed on either side of a DIMS module mm ji 6 0 Fixed and Adjustable Laser Mounts The DTMS comes with either fixed laser mounts Figure 5 or adjustable laser mounts Figure 6 The fixed laser mounts are factory adjusted so that the laser cross hair 1s already aligned within the module s case enclosure The adjustable laser mounts have knobs that allow you to rotate the laser and to aim i
8. displacement Each segment of the measurement system can be thought of as a vector with a known length and angle relative to the adjoining segments By using a vector approach the DTMS can measure deflections much larger than the sensor array size which minimizes the system s space requirements The DTMS uses a microprocessor on each sensor printed circuit board to detect the positions on the sensor array where the cross hair laser intersects the array As an all digital device the DTMS 1s not subject to noise and drift and it 1s inherently immune to the overall motions of the structure being measured A host computer polls the sensor arrays over a multi drop serial communication network and calculates the deflection at each sensor array For test and measurement applications the host computer can perform display and data logging functions For OEM applications where the displacement data 1s used for monitoring and control the functions of the host computer can be programmed into an existing controller General Description The simplest version of a DTMS system is called a half segment Figure 1 1 A laser projecting a cross hair beam is rigidly mounted to one end of the structure being tested A rectangular array of photosensors 1s rigidly mounted to the structure s other end As the structure bends and twists three types of motion are measured from one end of the structure to the other side to side dY up and down dZ and twist about t
9. has a Modbus address Modules at the ends of a DTMS measurement string have only one circuit board each and therefore one address Modules in between the two ends of the DTMS string each have two boards and two Modbus addresses The Modbus addresses for each board are put on labels on the outside of the case as shown in Figure 12 17 Figure 12 DTMS module with Modbus address labels Modbus Address 3 The Modbus address of each board 1s stored in the processor s non volatile memory When a DTMS system 1s shipped from the factory each module has unique Modbus addresses If necessary the Modbus address of a board can be changed in the field using the DTMS software If you change the address of a board you should put the new address on the label 8 0 DTMS Naming Conventions and Segment Length The DTMS software uses the naming conventions shown in Figure 13 an example of a two segment system The terms Outbound and Inbound refer to the directions toward which the lasers are pointing In other words the laser beam is transmitted from one end of a module its Outbound half and received by one end of the next module its Inbound half These two halves make up a single Segment in the string of DTMS modules 18 Figure 13 Naming conventions two segment example Out In bound boun CW Segment 1 4 k k Root Module Middle Mod
10. inch Multi segment worst case twist error 0x Oy 07 0 031 x N 0 0197 degrees 12 48 VDC Communication SO ono up to 1M bits per second 14 to 122 F a The laser s zero position can be adjusted anywhere within the rectangular sensor array Data shown is for lasers set to the center bi directional measurement and to one edge uni directional measurement Maximum twist is at zero Y or Z axis deflection See the fitting spreadsheet for the maximum twist measurement with Y and or Z deflections See Table 2 2 for details Maximum distance between end points The 45 meter length can be extended to meet your requirements please contact Boxboro Systems Length is along the X axis width is along the Y axis height is along the Z axis Other communications protocols can be accommodated 45 The twist about the Y or Z axis 1s the tangent angle between adjacent segments The twist about the A axis 1s the cumulative twist up to and including the current segment Table 2 2 shows the maximum deflection and twist errors for DTMS systems with up to 10 segments Table 2 2 Worst case deflection and twist errors vs number of segments Number of Twist Errors Segments _Errors Y Z 0x y 2 mm inch degrees 06 0 004 0 077 10 10 5 DTMS Options Plastic pipe for protecting the optical path in set ups that will be exposed to bright sunlight blowing rain dust or other debris The HDPE triple
11. mid right area of the screen Top Right Bottom and Left display the crossing positions of the laser cross hair on the CCD sensor arrays These boxes display the number in millimeters or pixels depending on the position of the Eng Unit Pixels switch 30 Figure 18 Crossing screen ff Untitled Panel We i P xj CONNECTED TO PORT CONNECTED TO DTMS Segment Number Direction m 3 LASERS ON Inbound DATAACO CONFIGURATION CROSSING SIGNALSTRENGTH TOOLS 25 22 0 16 16 14 12 10 amp E 4 ra ce PI Ix B 8 10 la 14 16 19 20 22 2425 P gt ka E ES ES NE co MILL wx fun SCH A ES 22 do d n e a 8 d 2 dr 18 i na Li 14 4 HE SE p ARE 10 a ii 6 Left Right E 25H E 01 S Bottom e SIZE TL ia ra ra prar Fer PESTE DE a 2 3 1 7 S i iE i si i n S pens UNIT e E 2 PIXELS I GH ra I l l I I SE co m b 1 r2 ce S flrs Mk REL a __ 2 M RR O OS O ES ES ES IN O N O ES O O IO O IS A gt SCH ze cell de 16 d4 12 10 a E 4 4 6 5 10 12 14 16 la 20 22 425 Copyright 2015 Boxboro Systems LLC 31 14 0 Data Acquisition Screen The Data Acquisition tab appears at the top farthest left The Data Acquisition screen 1s for collecting data and re plotting previously collected data When the DTMS is collecting data the program can display the streaming data as a 3 D plot Figure 19 or a strip chart re
12. power setting e Threshold This is the setting for detecting the laser signal It can range from 0 to 1023 See section 12 0 Signal Strength Screen for instructions on how to adjust the threshold setting 22 e Integration Time This is the CCD sensor integration time See section 12 0 Signal Strength Screen for instructions on how to adjust the sensor s integration time setting e Code Version This is the firmware version e Flash Status This indicates the quality of the user s data stored in flash memory When the system boots up the DTMS board verifies that the configuration data stored in flash memory 1s not corrupted The flash area stores user data such as the laser power threshold and integration time as well as the communication port settings If the flash data 1s uncorrupted this field displays OK However if flash memory contains corrupted user data this field displays BAD USER If the user flash data 1s corrupted the board communicates at the factory default settings of 115 200 baud rate 1 stop bit and no parity and the Modbus address 1s re set to 255 To re write the user flash you need to re enter your communication port settings section 10 1 above and the parameters on the Signal Strength screen section 12 0 If the DTMS board s calibration data 1s corrupted this field will display BAD PROTECTED If this occurs the DTMS module must be returned to the factory to be re calibrated 10 3 Boar
13. setup exe program Then follow the instructions on the screen This program will install the DTMS software and the National Instruments LabWindows CVI Run Time Engine 9 1 USB to RS485 Adaptor Driver Installation Follow the instructions for installing the USB to RS485 driver that comes with the adaptor Make a note of the communication port number that the driver uses This number will be needed later to configure the DTMS software 9 2 Starting Up the DTMS software When you start the DTMS software it reads in a default initialization file and connects to the USB to RS485 adaptor on the communication port specified in the default initialization file If the software cannot connect to the adaptor because of the wrong port number or the adaptor 1s not plugged into the PC the program will generate a message and take you to the Tools screen so that you can configure the correct PC communication settings 10 0 Tools Screen The Tools screen Figure 15 has controls for reading the DTMS board configuration and selecting the communication settings for your PC and the DTMS boards sections 10 1 10 3 below The Tools screen also checks and displays the timer resolution of the PC The PC timer resolution must be less than or equal to 0 001 seconds for the program to execute properly The terms com and comm refer to communication 20 Figure 15 Tools screen DATA ACQ CONFIGURATION TOOLS Modbus Address ad u ER
14. wall drain pipe was described previously in Section 5 1 and shown in Figure 4 For a PC to communicate with the DTMS an RS485 two wire adaptor is needed You can purchase a B amp B Electronics USOPTLA Isolated USB to RS485 port powered converter through Boxboro Systems You can purchase a Tenma Model 72 8345 lab style power supply through Boxboro Systems as an option It can supply up to 36 VDC at 3 amps 108 Watts and has current limiting to prevent damage from short circuits The Tenma supply also displays the voltage and current It has banana jacks for V V and earth ground For DTMS power and communications Boxboro Systems can provide 22 gauge four conductor two pair twisted shield cable An optional pressure and temperature transducer is available which allows the DTMS program to display the board s ambient pressure in psi pounds per square inch and the temperature in degrees Celsius If the transducer is not installed these fields display N A 46 Appendix 3 Modbus Register Map The DTMS communicates using Modbus RTU binary protocol It supports the following commands e Read Holding Registers 0 x 03 e Write Single Coil 0 x 05 e Write Single Register 0 x 06 All other commands result in a Modbus exception response with an exception code All coil commands are write only and they initiate a response as defined in Table 3 1 Some Holding Registers are read only and some are read write The holding register
15. Board Communication Settings PC Communication Settings Read Board Configuration Baud Rate Baud Rate pem 115200 v Party Parity NONE Stop Bits Stop Bits Com Port Change Modbus Address Pressure psi Save Board Com Settings Save PC Com Settings Laser Driver LASER OK Input Voltage 2 Temperature deg C l Find Board Modbus Address Connect To Comm Fort Seral Number TIT ILL Laser Power 0 Threshold ny Integration Time 0 Code Version 0 Flash Status OK Timer resolution on this PC 0 007000 Copyright 2015 Boxboro Systems LLC 21 10 1 PC Communication Port Settings The PC communication port settings are on the right hand side of the Tools screen You can set the Baud Rate Parity Number of Stop Bits and the RS485 adaptor communication port number The PC port settings should match the DTMS board settings section 10 2 below for them to communicate with each other The initial settings for all DTMS boards when shipped from the factory are e Baud rate 115 200 bits per second e Parity none e Stop bits 1 After you make changes to the PC communication settings click on Save PC Com Settings to save them in the initialization file Then when you re open the Tools screen 1t will display the saved PC communication port settings The prompts will also ask 1f you want to open the port with the saved settings The Connect to Comm Port button opens the PC port w
16. DEFLECTION AND TWIST MEASUREMENT SYSTEM DTMS Model 47 User Manual Revision 1 0 August 2015 Boxboro Systems LLC 369 Sargent Road Boxborough Massachusetts 01719 USA www boxborosystems com Table of Contents Page 1 0 Paser Sale y ans sense m M 5 2 9 ike gore Bi OD ee ee ee ee 5 ER a EE 6 2 0 TD d RE Eeer e elica 7 3 0 D TNIS Module MOUTDEITO aus o eens a a 7 5 1 Installing Optional Pipe Between Module 9 6 0 Erxedand Adjustable Laser Mouse ne 10 VEO S SUCH Wine 13 Tal RS485 Termination Ressort 16 O NA A ua eat 16 1 3 155455 AGA Pll ibo laica 17 TP DENIS DOT EE E 17 73 DMS Module Modbus ATI ES en DR aa 17 8 0 DTMS Naming Conventions and Segment Length esses 18 DIU SOM WAL sta Ua O sapa inteapa aia tt na tn Dina a an Diaz a ai 20 9 1 USB to RS485 Adaptor Driver Installation i 20 2 2 starune Up Mhe DIDVIS ee 20 L0 0TLoolssereelia cea 20 I0 T PC ommunicauon Port Set lip nee 22 10 2 Board 2 OME CUT AON s oe ei EE AAA 22 10 5 Board Communication We EE 23 10 4 Find Board Modbus Address 23 O COnttourdtiom Screen en ee 23 11 1 Set Upa DIMS Configuratio aan a ee taia ll 25 MAS A SS CE Dle it sf coli at ana re Sen eect en ee eee ae iarta def 25 Parla ile ila 22 12 1 Sesment Number and Direcio i sal lisi 28 EE o ceca ice E OEE IE E AT E 28 PAZ OWIE eee EE ea a nae ERE 28 124 Base POWO see ul o eta a c ee ei 28 12 5 Threshold Seins u c e eda a lt ada 28 12 6 Intt
17. E d E EE 27 Figure 18 E E E E EE 31 Figure 19 Data acguisitom sereen A ee tomi anu 33 Figure 20 Data acquisition screen strip chart recorder plot eee 34 Figure 21 Data acquisition screen time history plot eee 35 Figure 22 Data acquisition screen single sample data 39 Figure 1 1 Halt segment E 41 Figure 1 2 kee Ee Syste alla 41 Figure 1 3 Coordinate system and data output from a full segment 42 Figure 1 4 Multi segment maximum deflections sees eene 42 Figure 1 5 Second Mode Dendins AAA 43 Table 1 Table 2 Table 2 1 Table 2 2 Table 3 1 Table 3 2 DIMS System WINE ea a ai d apei 13 sample DTMS CSV data file for single segment eee eee 36 DIM Ee ian 45 Worst case deflection and twist errors vs number of segments 46 CORE e EE 47 elei eu lla 48 1 0 Laser Safety DANGER This product uses CDRH Class II Lasers CDRH the Center for Devices and Radiological Health 1s the U S federal agency that regulates the manufacture of lasers and other radiation emitting electronic products The Class II laser specification requires that less than 1 milliwatt mW of optical power is received in a 7 mm diameter aperture at a distance of 200 mm from the laser module The laser in the DTMS has cross hair generating optics permanently installed and the laser 1s mounted 90 mm from the end of the pipe adaptor on the modul
18. MS can run on a variety of power supplies or batteries You can purchase a Tenma Model 72 8345 lab style power supply through Boxboro Systems as an option It can supply up to 36 VDC at 3 amps 108 Watts and has current limiting to prevent damage from short circuits The Tenma supply also displays the voltage and current It has 16 banana jacks for V V and earth ground Please refer to the Tenma User Manual for more information If you use a battery to supply power we recommend that you wire a fuse in series with the battery to prevent damage due to short circuits For field applications you can use your vehicle battery 7 3 RS485 Adaptor For a PC to communicate with the DTMS an RS485 two wire adaptor is needed You can purchase a B amp B Electronics USOPTLA Isolated USB to RS485 port powered converter through Boxboro Systems as an option Before using this converter you must install the drivers supplied with the converter The converter emulates a serial port and you can determine which port number it is assigned to using the device manager function Please refer to the documentation provided with the converter 7 4 DTMS Board Fuses The DTMS uses a 0 5 amp 5X20 medium blow fuse on each board such as a BELL SMT 500 R A spare fuse is also mounted on each board The spare fuse 1s marked as SPARE Figure 11 shows the fuses on the boards Figure 11 Fuses 7 5 DTMS Module Modbus Addresses Each DTMS circuit board
19. ORATION AMVC iones a pi LIS Ee 29 12 7 Saving Settings to Non Volatile Memor 29 12 8 Graph Zooming Panning and Re Setting eee 29 12 9 Laser ECKE 29 Is OR Bi Cecil a Sats rer 30 IAO DIET U IST ION SCH navale 32 HEVE ONEC DI A a 36 EE EE 36 lS drole cane eee 36 114 4 arce D Plot Contour ai n at a 36 14 5 Strip Chart Recorder Plot Controls ea ala vh a ta al dala 37 4 6 Time Hton Plot Controls ee ee e 34 146 200108 and Eeer Ate lia 37 14 7 Collecte a Sole Sample albi 38 Appendix low D TNESWoOrkS asi dei a dire anis aa 40 Appendix 2 DEMS SpecitiCations assiale 44 Appendix Modbus Reelster IVIap ss eet pa lea tonto ia te 47 List of Figures and Tables Page Figure SREL EE 6 Figure 2 Monte Hole PA piso it 8 Figure 3 DIMS module witir U DO lodi 9 Figure 4 Triple wall drain pipe installed on either side of a DTMS module 10 Figure 5 Eeer 10 Figure 6 Adjustable laser THOU BUS oso itu tal 11 Figure 7 Adjustable laser mounts removed from the case 12 Figure 8 Module wirins beemntng of SINS uus c 14 Figure 9 Mod le winne RE e ni cid 15 Figure 10 B amp B converter and power suppl 16 Figure 11 EE 17 Figure 12 DTMS module with Modbus address Labele 18 Figure 13 Naming conventions two segment example eee eee 19 Figure 14 Top view of DTMS module with measurement plate 19 Figure 15 Kee tia 21 Figure 16 EE 24 Figure 17 Sighial
20. TO OTMS DATAACO CONFIGURATION TOOLS ce e E 100 50 30 Stop Playback 20 amp he Time History Angles Degrees a 50 40 30 o A 99 10 c T m y 94 20 E d HTH A M hr ln un BEE 28 A AA A A E K LE 4 9 m 50 e u Itt dee Linee Lcd Lf E fo UL ee Le ae LL He Lee Lc 0 aS 30 S 1 unu suonaajga g SU 40 40 RD eee one am BEE 50 ER II E E E E E a a a B0 0 BU on d Rotation degrees 40 Y Rotation degrees 100 Rotation degrees 2 00 0 00 Time seconds File Name e serssDan D esktap dtms 3d demo cev Copyright 2015 Boxboro Systems LLC 35 14 1 Collect Data The Collect Data button in the upper right of the Data Acquisition screen tells the program to start collecting data After you click on the button the program first displays a File Select box for you to name the data file and its storage location The file will be created in CSV format comma separated variables CSV files can be opened in spreadsheet programs or imported into other data analysis programs After you have identified your data file name and location the program begins collecting data and
21. a collection the sensor boards need to transmit only the data point where the lasers beams cross the sensor arrays instead of an analog value for each pixel on each sensor The analog data verifies that the signals are clean with no ambiguities around the switch points that identify the laser sensor board crossing positions 12 1 Segment Number and Direction On the upper right side of the screen select the Segment Number as defined in your configuration The Direction box top right refers to the location of the CCD sensor array So for example Segment 1 Inbound refers to the Inbound facing CCD sensor the one receiving a laser beam and the Outbound facing laser the one transmitting its beam into the next module When you select a segment and direction the program polls the sensor boards to get the current values of Integration Time Threshold and Laser Power from the boards non volatile memory 12 2 Laser Switch The Laser switch upper right turns on or off the laser that illuminates the selected CCD sensor 12 3 Run Switch When the Run switch just left of the Laser switch is turned on the program starts polling the selected CCD sensor array collecting and displaying both analog and digital data for each sensor You can display the ambient light by setting the Run switch on while the Laser switch 1s off 12 4 Laser Power You can adjust the voltage to the laser from zero to 100 by using the Laser Power slider control or by en
22. corder plot Figure 20 Previously collected data can be played back as a 3 D plot or displayed as a time history plot Figure 21 These functions are described below in more detail 32 Untitled Panel CONNECTED TO POAT CONNECTED TO DTMS DATAACO CONFIGURATION TOOLS File Name Figure 19 Data Acquisition screen 3D plot Time 5 70 Collect Data Stop Playback Plot Type 3D Multi Seg Y Scale max min 30 0 Scale max min 90 0 Single Sample 1c IserssD ansD esktapsdtms 3d demo csv Copyright 2015 Boxboro Svstems LLE 33 Figure 20 Data Acquisition screen strip chart recorder plot Untitled Panel 10 xl CONNECTED TO PORT CONNECTED TO DTMS ASERS ON a 9 DATAACQ 500 0 om 10 0 400 0 2 0 350 0 7 300 0 6 0 Plot Type 250 0 5 0 il O AA 1 a il E Deflection max min 500 0 Angle max min 10 0 Deflections mm co cel I c s33163p sajbug 250 0 5 0 300 0 ER 350 0 f 400 0 a0 450 0 90 500 0 100 Bil 598 52 605 00 610 00 615 00 620 00 625 00 630 00 635 00 640 00 645 00 648 02 rotation about Time seconds i rotation about Y Time 65 00 File Name cMlsersh art ezktop TT UM Copyright 2015 Boxboro Systems LLC 34 Figure 21 Data Acquisition screen time history plot joj xj FI m a n i sel E gt gt Lc II DL C ke c Lu Li Lu o Li CONNECTED
23. d Communication Settings When you click on Read Board Configuration in addition to displaying the board settings as described above the program displays the Board Communication Parameters on the right hand side of the screen next to the PC Communication Settings You can change the baud rate parity stop bits and the board Modbus address Pressing Save Board Com Settings will write the new information to the user flash on the board but will not take effect until the board 1s re booted Make sure that you don t change the Modbus address to an address being used by another board unless you are also going to change the other board s address also Clicking on the Reboot Board button will force the board to reboot If you made changes to the baud rate parity or stop bits the PC will not be able to communicate with the board until its settings have also been changed 10 4 Find Board Modbus Address This button should be used with only one DTMS board connected to the network The button 1s provided just in case a board Modbus address has been changed and you don t know what it 1s When you click on this button 1t will send out a broadcast message requesting the board address The board will respond with its address If more than one board 1s on the network then they will all respond at the same time and a communication error will occur 11 0 Configuration Screen You will automatically be taken to the Configuration screen Figur
24. d in non volatile memory and these values are used whenever a DTMS system is powered on 12 8 Graph Zooming Panning and Re Setting The graph can be zoomed and panned while the program 1s updating Run switch set to ON or while it is not updating Run switch set to OFF While the Run switch is OFF e To zoom into the plot hold the Control CTRL key and the Left mouse button then draw a box focusing on the area of interest To zoom back out hold the CTRL key and the Right mouse button then expand the view e To pan the plot hold the CTRL and SHIFT keys and Left mouse button then move the mouse to encompass the area of interest e To exit or un do zooming and panning hold the CTRL key and press the SPACEBAR You can un do up to 25 operations e To change colors line thickness or plot style Right click on the symbols for the four sensors in the plot s legend box e Re set the graph back to the original format by clicking on the Reset Graph button While the Run switch is ON you can zoom and pan the same way and you can re set the graph with the Reset Graph button but you cannot change the plot style while data is being collected from the sensors 12 9 Laser Line Widths Underneath the graph four boxes display the width mm of the laser lines at the points where they cross the Top Right Bottom and Left sensor arrays As the DTMS segments get longer the lines get wider and as the lines get wider less motion ca
25. e Therefore the Class II laser rating 1s ensured only up to a distance of 110 mm beyond the end of the DTMS module DANGER DO NOT PLACE YOUR EYE CLOSER THAN 110 MILLIMETERS 4 33 INCHES FROM THE END OF THE DTMS MODULE WHEN THE LASERS ARE ON OR COULD BE TURNED ON YOU CAN DAMAGE YOUR EYES Normal exposure to this type of beam will not cause permanent damage to the retina since the blinking reflex of the human eye 1s fast enough to avoid any damage This safety rating 1s considered eye safe but can be hazardous if there is direct long term ocular exposure Although CDRH Class II lasers are considered eye safe take the following precautions DO NOT stare directly into the beam DO NOT use focusing optics to look at the beam The farther from the DTMS module the lower the power of the light that can enter your eye The power 1s inversely proportional to the distance squared At 10 5 feet 3 2 meters from the DTMS module the laser power 1s less than 0 0039 mW equivalent to a Class lla laser The CDRH rules for a Class IIa laser allow for continuous exposure for up to 16 minutes with no eye damage At 34 feet 10 4 meters from the DTMS module the laser power will be less than 0 00039 mW equivalent to a Class I laser similar to a laser pointer The CDRH rules for a Class I laser allow for continuous exposure with no eye damage BE CAREFUL YOU CAN DAMAGE YOUR EYES 2 0 Introduction The DTMS system is a string of DTMS modules connec
26. e 16 when the DTMS program starts up if the USB to RS485 converter is plugged in and recognized The Connected to Port light on the upper left side of the screen will be on The Configuration screen will automatically load and display the last configuration that you used 23 Figure 16 Configuration screen CONNECTED TO PORT CONNECTED TO DTMS e e DATAACQ CONFIGURATION TOOLS Number Of Segments Sample Rate Hz Connect to DTMS Collect Zero Data and Read Config Data from DTMS Modules 1 3 2 5000 00 i i 5 4 5000 00 Collecting zero data will also store the configuration information in the i 3 7 6 5000 00 xxl program s initialization file Save Configuration Data in a Hle You Name Load Configuration Data From a File You Named Copyright 2015 Boxboro Systems LLC 24 Dx 11 1 Set Up a DTMS Configuration Follow these initial steps to begin setting up a DTMS configuration 1 Go to the Number Of Segments drop down box and select the number of DTMS segments you plan to use Note that a half segment has a laser at one end and a CCD sensor array at the other end A half segment determines motion between two DTMS modules Y and Z deflections and twist about X The table below the drop down box will adjust for the number of segments that you select 2 Enter the two Modbus addresses for each segment one for the inbound board and one for the outbound As shown earlier in Figure 12 the terms
27. e of data and displays it in tabular form Figure 22 Data from the end of each segment 1s displayed 38 Figure 22 Data Acquisition screen single sample data Bl SI CONNECTED TO PORT CONNECTED TO DTMS DATA ACQ CONFIGURATION CROSSING SIGNAL STRENGTH TOOLS Single Sample Data Collect Data A Twist S Twist T Twist z 1 1999 97 013 400 0 09 Playback Data 5 388834 21 35 013 um 109 5 538388 3202 4428 013 000 10 Flot Type 4 738383 4268 2535 013 000 109 Se 5 999975 5333 3857 013 O00 om 3D MultiSeg Y Single Sample File Name SE Copyright 2015 Boxboro Systems LLC 39 Appendix 1 How DTMS Works The Deflection and Twist Measurement System DTMS provides highly accurate structural deflection and twist data in real time DTMS 1s an all digital fast response electro optical measurement system made up of multiple segments Each segment has laser diodes and high accuracy photosensor arrays at each end which generate the X Y Z coordinates and twist for that segment When several segments are connected and mounted on a structure the system provides the dynamic shape of the structure while it is moving The length and number of segments can be optimized to meet your measurement requirements and to fit within your structure s available space The DTMS makes use of optical sensor arrays with extremely fine spacing The straight beam of a cross hair laser serves as a reference for measuring
28. he X axis a In other words the system reports three degrees of freedom 40 Figure 1 1 Half segment schematic Sensor Array Structure with Twist and Bend X axis In a full segment DTMS system each end of the structure being tested has both a laser and a sensor array With a full segment the system reports five degrees of freedom by measuring five types of motion deflection in the Y and Z directions and twist about the X Y and Z axes Figure 1 2 shows the coordinate system for a DTMS module at one end of a full segment The center of the coordinate system 1s half way between the two ends of the enclosure and 66 5 mm up from the bottom of the base For a half segment system the center of the coordinate system is 23 mm from the front face of the module 91 mm from the center of the module and 66 5 mm up from the bottom of the base Figure 1 2 Full segment schematic with coordinate system 41 With these five degrees of freedom being reported full segments can be placed end to end to create a multi segment system Figure 1 3 The data from each segment is added vectorially that 1s the data from the end of each segment is reported with respect to the coordinate system of the beginning of the first segment called the root module Either end can be selected as the root module for the data reference point The distance between the modules that make up each segment is set by the user to capture the maximu
29. he non volatile memory on the circuit boards e Align cross hair lasers to the desired positions on the sensor arrays The cross hair pattern 1s adjusted to the center of the sensor array to allow equal motion of the structure up and down and from side to side e Geta zero reading for the system e Start collecting data 4 0 DTMS Installation Planning Before installing the DTMS system you must have an idea of how much the structure will bend in each direction Y and Z and how much it will twist about the long axis X A tool called the DTMS Fitting Spreadsheet is provided on a compact disk that is shipped with the DTMS system along with instructions for using the spreadsheet The spreadsheet and other disk contents can also be downloaded from the Boxboro Systems website www boxborosystems com Once you have the estimated deflections and twist of your structure you can use the fitting spreadsheet to determine how many DTMS segments you need The spreadsheet also helps you determine how long each segment needs to be which is defined by the length between two modules from center to center Segments might not all be the same length depending on your measurement requirements It is a good idea to allow extra measurement range in case your structure deflects or twists more than you expect Once you know where you are going to mount the DTMS modules and what the distances are between the modules that is the segment lengths as wel
30. hows the data at the end of the DTMS system that is the data collected by the last module in the string with respect to the coordinate system of the first module at the other end You can set the maximum and minimum values for the vertical deflection and twist axes by using the numerical boxes labeled Deflection max min and Angle max min Enter your desired scale values into the boxes 14 6 Time History Plot The time history plot is used for playing back data The full dataset from the file is plotted The left and right vertical axes are autoscaled but you can change them manually by clicking on the top or bottom numbers and typing in whatever number you want 14 6 1 Zooming and Panning In a time history plot you can zoom and pan to review interesting parts e To zoom into the plot hold the Control CTRL key and the Left mouse button then draw a box focusing on the area of interest To zoom back out hold the CTRL key and click the Right mouse button e To pan the plot hold the CTRL and SHIFT keys and Left mouse button then move the mouse to encompass the area of interest e To exit or un do zooming and panning hold the CTRL key and press the SPACEBAR You can un do up to 25 operations e To change colors line thickness or plot style Right click on the symbols for the four sensors in the plot s legend box 37 14 7 Collecting a Single Sample If you click on the Single Sample button the program collects one sampl
31. ith the saved communication settings When the PC connects to the port the red Connected to Port light in the upper left corner of the screen lights up If the PC can t connect the Tools screen will display an error message The Disconnect Comm Port button disconnects the PC from the communication port and the Connected to Port light turns off 10 2 Board Configuration If the DTMS is powered on and connected to the RS485 adaptor you can communicate with a board by first selecting 1ts Modbus address and then clicking on Read Board Configuration in the upper left area of the Tools screen After reading the board configuration the program displays the following data e Laser Driver This is the laser driver fault bit e Input Voltage This is the voltage at the input of the board after a protection diode Therefore the voltage displayed will be the bus voltage 0 6 volts e Pressure and Temperature If the optional pressure and temperature transducer is installed see DTMS Options in Appendix 2 the program displays the board s ambient pressure in psi pounds per square inch and the temperature in degrees Celsius If the transducer 1s not installed these fields display N A e Serial Number This is the serial number of the board e Laser Power This is the setting for the laser driver It can range from 0 to 1023 See section 12 0 Signal Strength Screen for instructions on how to adjust the laser driver s
32. l as the Modbus addresses of each module you will be able to build a configuration file using the DTMS software 5 0 DTMS Module Mounting The DTMS modules must be rigidly mounted to the structure The base plate has 4 holes two at each end on either side that are 0 531 inches in diameter 13 5 mm The holes are sized for 1 2 13 bolts although smaller bolts can be used with appropriate washers The middle holes on both sides are 0 625 inches in diameter 15 9 mm These are used on the calibration fixture with precision shoulder bolts for locating the unit but can also be used for mounting the DTMS module to the structure Figure 2 shows the mounting hole pattern The DTMS modules can also be mounted using standard U bolts for 6 inch 15 cm pipe as shown in Figure 3 Figure 2 Mounting hole pattern 0 53 inch diameter 0 625 inch diameter 6 0 inch 3 0 inch Figure 3 DIMS module with U bolt If fixed laser mounts are used in the DTMS modules then the modules must be aligned so that all of the laser cross hairs are centered on the sensor arrays of the adjacent modules If the structure has any bend or uneven mounting surfaces the modules might have to be shimmed to align the lasers with the CCD sensors charge coupled device sensors If the optional adjustable laser mounts are used then the lasers can be moved left right Y direction and up down Z direction to align the lasers with the sensor arrays The lasers can
33. m deflection within the segment Shorter segments are used where the structure bends a lot and longer segments are used in areas where bending 1s not as severe Figure 1 3 Multi segment schematic RA p Segment gt Neu Segment gt 3 HE End Segment gt 2 _ oe Module 1 a __ imd Sw e j Root Module Figure 1 4 shows the maximum Y or Z deflections and curvature of the structure that can be measured with the DTMS Model 47 The length of the three measurement systems is the same 25 meters but each has a different number of segments 5 10 and 15 and thus different segment lengths The symbols show the locations of the sensor arrays The graph was generated using the maximum data that can be measured deflections within each segment and angle between segments Figure 1 4 Maximum deflections in multi segment systems 6 5 0 4 9 5 seg O E 3 m 10 seg N e 15 seg gt 2 X meters 42 Figure 1 5 shows how a 25 meter system with 10 segments can measure the second mode bending of a structure in the Y or Z directions Figure 1 5 Second mode bending in multi segment systems 0 45 0 40 0 35 0 30 0 25 e 10 seg 0 20 Y or Z meters 0 15 0 10 0 05 0 00 0 5 10 15 20 25 X meters
34. n and verify the alignment of the laser cross hairs on the sensor boards section 13 0 Crossing Screen If the signal strengths have already been adjusted and the cross hairs have been aligned the next step 1s to zero the system Click on Collect Zero Data and Read Config Data from DTMS Modules in the Configuration screen This turns the lasers on reads their current positions and saves them as the Zero value This button also reads all of the configuration data for each board such as integration time threshold and laser power and stores the data in the default initialization file that the program reads when it starts up You can also save the configuration data in your own separate file by clicking on Save Configuration Data in a File You Name and then retrieve the data by clicking on Load Configuration Data from a File You Named 25 12 0 Signal Strength Screen Once you are connected to the DTMS system two new tabs will appear in the upper left of your screen between the Configuration and Tools tabs Select the Signal Strength tab to open the screen Figure 17 which 1s used for adjusting the laser power CCD sensor integration time and CCD sensor threshold setting To get the fastest response from the system you generally want to use maximum laser power and minimum integration time You should adjust the settings so that the signal 1s saturated 100 and has clean rising and falling slopes as shown in Fig
35. n be detected and measured For example if the lines are 10 mm wide focusing within a 47 x 47 mm sensor array only 27 mm or motion can be measured 47 mm 2 X 10 mm 27 mm 29 13 0 Crossing Screen The Crossing tab appears in the upper left between the Configuration and Signal Strength tabs The Crossing screen Figure 18 shows the laser beam s cross alignment with the sensor array The laser line widths are those shown previously on the Signal Strength screen If your system has adjustable laser mounts you should use the Crossing screen to position the laser cross hair in alignment with the center of the sensor array However if you expect your structure to move in only one direction you might want to align the laser cross hair in another part of the array For example 1f your structure will move only toward the left you can position the laser cross hair on the left edge of the array which effectively doubles your measurement range Similarly if your structure will move only upward you can position the laser cross hair at the array s top edge The controls on this screen are similar to those on the Signal Strength screen Segment Number is the number defined in your configuration Direction is the direction the CCD sensor faces Inbound or Outbound the Laser switch turns the laser on and off and the Run switch starts and stops collecting and displaying data from the CCD sensor array The four numerical boxes in the
36. r supply and RS 485 converter One pair of wires red and black supplies DC power to all of the DTMS module boards A second pair green and white provides for RS485 two wire communication The shield wire 1s connected to the DTMS cases using the grounding screw Generally the shield is tied to the power supply s earth ground terminal at the PC end of the cable The shield can also be left floating if that works better in your system Table 1 shows the system wiring Table 1 DTMS system wiring B amp B USB 485 DTMS Board Wire Converter Power Supply Signal Name Terminal Color Terminal Terminal i Marking Marking Power rd Red V P Black V Transmit Receive white TDB x D ENSE pr aE a mu Shield bare green earth grounding ground screw on case Fach DTMS module at either end of a measurement string contains a single printed circuit board DTMS modules in the middle of the measurement string contain two circuit boards Each DTMS circuit board has two screw terminal connector blocks These screw terminal blocks are wired in parallel and either or both can be used DTMS modules with two boards installed have a jumper cable connecting the two boards Wires entering the DTMS modules should be routed through the sealing cord grips Tighten the backshell of the cord grip to seal the wire with a 13 16 wrench The cord grips have a PG7 thread and they can accept wire diameters from
37. s are defined in Table 3 2 Note that registers 29 42 are stored in protected flash memory and cannot be changed by the user Table 3 1 Coil responses Coil Address l 1 Get Digital Data initiates a scan of the CCD array to find the laser crossing points and stores them in the holding registers Get Analog Data from Top CCD initiates a scan of the top CCD storing the analog data in the holding registers 1 register per pixel Get Analog Data from Right CCD initiates a scan of the right CCD storing the analog data in the holding registers 1 register per pixel Get Analog Data from Bottom CCD initiates a scan of the bottom CCD storing the analog data in the holding registers 1 register per pixel Get Analog Data from Left CCD initiates a scan of the left CCD storing the analog data in the holding registers 1 register per pixel Stores all user entered data in processor flash memory 47 Table 3 2 Holding registers 0 Y Modbus Address of the board I Y Baud Rate 1 9600 2 19 2k 3 38 4k 4 56k 5 115k 6 230 4k 7 1000k 2 Y Parity O none t even 2 0dd4 3 Y Q Stopits0 1 1 2 0 4 Y JTheshod 0 10285 gt O 5 Y Integration Time 3 4165 1 6 Y LaserPower 0 102350 0 000 7 Flash Status 0 OK 1 bad user flash 2 bad protected flash 3 bad user and protected flash 9 10 N Laser Driver Overcurrent O OK 1 Overcurrent
38. t up and down and from side to side Figure 7 shows the adjustable laser mounts removed from the case Figure 5 Fixed laser mounts 10 Figure 6 Adjustable laser mounts 11 Figure 7 Adjustable laser mounts removed from the case Figure Key The Yellow knob 1 moves the cross hair from side to side along the Y axis The side to side adjustment is locked in with the socket head screw 2 using a 5 64 hex key wrench The Grey knob 3 moves the cross hair up and down along the Z axis The up and down adjustment is locked in with the socket head screw 4 using a 5 64 hex key wrench The Black knob 5 rotates the cross hair about the X axis The rotation adjustment is locked in with the button head screw 6 using a 3 32 hex key wrench Note Short L type hex key 5 64 and 3 32 wrenches stubby are provided with the adjustable laser mounts to allow access to locking bolts 4 and 6 inside the DTMS case 12 DANGER Turn the DTMS power off before using the hex wrenches to lock or unlock the adjustments You might touch the wrench to the power lines and get shocked Also the adjustment screws are close to the printed circuit boards so the wrench can damage the board components by causing a short circuit if the power 1s on 7 0 System Wiring The DTMS system uses a 4 wire power and communication bus A two pair twisted shielded cable 1s recommended to connect between all modules and at the PC end between the powe
39. ted into segments as many as needed to accommodate the height or length X axis of the structure being monitored The DTMS measures the motion of the structure in three dimensions left right and up down movements along the Y and Z axes and twist along the X axis using laser beams directed through each segment from one module to the next Optical CCD sensors charged couple devices detect the laser beams positions The DTMS Model 47 uses a 47 x 47 mm sensor array Figure 1 shows a sensor array on a printed circuit board mounted inside protective piping For more information please refer to Appendix 1 How DTMS Works and Appendix 2 DTMS Specifications Figure 1 Sensor array board 2 l Ka E CEU CSCE hy This manual describes how to Install DTMS modules Wire the DTMS modules and connect them to a PC Install the DTMS software Use the software to configure the system Collect data 3 0 Quick Start Guide Determine how many DTMS modules you need and where they will be mounted Mount the DTMS modules Wire the system including the DC power supply and RS485 converter Install the DTMS software and the USB to RS485 converter driver 6 e Set up the system configuration using the DTMS software e Adjust the signal strength for each laser sensor pair During this step you turn on the lasers and make sure that the cross hair beam is hitting the sensor array When good signal strength is achieved you save the settings to t
40. tering a number in the box below the sliding scale the two automatically change together Note that the lasers in this DTMS system achieve maximum power at a setting of about 40 Increasing the setting above 40 does not cause any problems but will not actually increase the laser power Other types of lasers in future DTMS systems might require the greater power range 12 5 Threshold Setting The Threshold slider 1s also scaled in percent 0 100 but the numerical box 1s scaled in counts from 0 to 1023 the two automatically change together The Threshold 1s typically set to about 90 so that the CCD sensor output must be above 90 for the digital output to turn on because as noted above the digital output 1s 0 when the analog output 1s below the Threshold setting 28 12 6 Integration Time The Integration Time slider is also scaled in percent 0 100 and the numerical box is the time based on the number of counts of a 16 MHz clock from 3 to 4165 The actual integration time ranges from 0 116 to 100 milliseconds The integration time increases with the length of the segment because the laser cross hair brightness is a function of 1 segment length 12 7 Saving Settings to Non Volatile Memory This button below the three sliding scales saves the Laser Power setting on the sensor board that controls the laser and it saves the Integration Time and Threshold settings on the CCD sensor array board The settings are save
41. the button label will change to Stop Collecting Clicking on the Stop Collecting button stops the data acquisition process Table 2 shows some typical CSV data for a single segment of a DTMS system The DTMS CSV file columns contain the following data Time in seconds from the start time Seg 1 X the X coordinate of the end of Segment 1 in mm seg 1 Y the Y coordinate of the end of Segment 1 in mm Seg 1 Z the Z coordinate of the end of Segment 1 in mm Seg TX the angle about the X axis in degrees Seg 1 TY the angle about the Y axis in degrees seg 1 TZ the angle about the Z axis in degrees Table 2 Sample DTMS CSV data file for single segment File Start Date and Time Number of Segments Sample Period mm mm mm degrees degrees degrees s 1 Of 0 01078 0 16599 0 00539 14 2 Data Playback The Playback button opens a File Select box for you to select a previously collected data file for review After you click on this button the label changes to Stop Playback When you are done reviewing the previously collected data click on the Stop Playback button which will release memory used to hold the stored data 14 3 Selecting Plot Type During data collection the Plot Type button allows you to select a 3 D or strip chart recorder plot During data playback this button lets you display the data as a 3 D or time history plot Figures 18 20 above show these three types of plots
42. ule End Module The root module is the first module of any DTMS system and all data are reported with respect to the root module s coordinate system The root module has only one circuit board identified by the Modbus address number 2 Remember that any Modbus addresses can be used for any modules but an address cannot be used more than once in a system The root module and the left side of the middle module board Modbus address 3 form Segment 1 The root module is the Outbound facing part of Segment 1 The left side of the middle module is the Inbound facing part of Segment 1 Similarly the right side of the middle module is the Outbound part of Segment 2 and the end module is the Inbound part of segment 2 The segment length is defined as the distance between the centers of two modules The cover of each module has a measurement plate attached to it The center line of the measurement plate is aligned with the center line of the DTMS module Figure 14 shows a top view of the DTMS module with the measurement plate circled in blue The two slots in the measurement plate are for hooking on a tape measure in either direction Figure 14 Top view of DTMS module with measurement plate 9 0 Software Installation The DTMS software will work on PCs running Windows XP Vista and Windows 7 and To install the software insert the DTMS CD into your CD drive Using Windows Explorer open the DTMS Installer directory and run the
43. ure 17 26 Figure 17 Signal Strength screen Untitled Panel l CONNECTED TO FORT CONNECTED TO DTMS Segment Number Direction o e LASERS ON d pes DATA ACQ CONFIGURATION CROSSING SIGNALSTRENGTH TOOLS lol xl i i Funi Laser Signal Strength Display 1 m 1 n sel Ort of Si HH Integration Time 3 Threshold Laser Power 5 2 H 100 100 100 30 an 90 al al 20 r Im Em 70 ZU T 60 60 60 En E El BE 50 R 50 40 40 40 a 3 30 30 30 e uno D B L LL i SC e EF a Li 20 20 205 10 10 10 x a Is THE 0 0 aj aj 10 930 388 3 zi 30 AH Save Settings to non volatile memory on DTMS modules GREIS TOP RIGHT GER Reset Graph 280 320 360 400 440 480 520 560 600 640 680 720 760 800 BOTTOM POSITION pixels LEFT a E CH CO c pev ZEE a d IM uum _ ra esa to a PA Le _ Laser Line widths mm TOP RIGHT BOTTOM LEFT 1 59 1 46 1 59 1 21 BOCH Copyright 2015 Boxboro Systems LLE 2 The Signal Strength plot shows the analog output of each CCD sensor Top Right Bottom and Left Overlaid on the analog sensor output is the digital output of each sensor The digital output is 0 when the analog output is below the Threshold setting and 100 when the analog output is above Threshold The digital data 1s used during dat
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