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Group 14671

Group 14671. Expansion Joint Active Monitoring. Team Members. Joe Savino Mechanical Engineer Adam Remick Electrical Engineer Andrew Hintermeier Mechanical Engineer. Risk Analysis. Full Assembly. Mounting. Mounting Plates. Threaded inserts. String Potentiometer. Infrared Sensor.

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Group 14671

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  1. Group 14671 Expansion Joint Active Monitoring

  2. Team Members • Joe Savino Mechanical Engineer • Adam Remick Electrical Engineer • Andrew Hintermeier Mechanical Engineer

  3. Risk Analysis

  4. Full Assembly

  5. Mounting Mounting Plates Threaded inserts String Potentiometer Infrared Sensor

  6. Axial Displacement Ultrasonic Infrared String Potentiometer

  7. Specs Infared String Potentiometer • Accuracy: +/- 0.04 in • Price: $305 • Vin: • Vout: • Accuracy: +/- 0.025 in • Price: $247 • Vin: • Vout:

  8. Temperature Insert mounted Probe • Price: • Vin: • Vout: Flange Probe • Price: • Vin: • Vout:

  9. Pressure Regular sensor with heat dissipation stem • Price: • Vin: • Vout:

  10. Microprocessor • Arduino Due • Arm Processor • 3.3V Logic • 3.3V and 5V Regulator on Board • 54 Digital I/O’s • 12 Analog Inputs (Can have up to 12 sensor inputs) • 4 UARTS • 84MHz Clock Speed • $50 • Goals: • Input Sensor Data • Store sensor Data on SD Card • Control a LCD Display • Control LED ‘Out of Range’ Lights

  11. Adafruit Micro-SD Card Reader • Uses 1 UART Port and 2 Extra I/O Ports • Made to Work with Arduino Board • $15

  12. LCD Display • 4 Lines of 20 Characters Each • +5 V input from Arduino Due • Uses 11 Digital I/O Pins • Will display the max temperature, max displacement and max pressure • $25

  13. LED Output • Pass fail system: • If the EJ has experienced out of range data, LED’s turn on and stay on until uCis reset • One for each sensor • Uses One I/O port per LED

  14. Block Diagram Data Pressure Sensor Micro LCD Display Vcc D0-D7 Data Temperature Sensor Enable Vcc Data R/W Displacement Sensor Vcc Pressure LED D-In Micro-SD Card Temperature LED Clk D-Out Displacement LED

  15. Bill of Materials

  16. Schedule

  17. Questions?

  18. Schedule

  19. Back Up Slide

  20. Engineering Analysis • Simulated an EJ under compression and tension in ANSYS Workbench • Displacement of ±1 inch • Used to determine where stress concentrations will be • Helps to determine sensor placement

  21. Compression

  22. Tension

  23. Engineering Analysis • Avoid areas in the middle of EJ and areas right below or above flanges • Embed sensors in between these areas • Minimize risk of EJ leaking after sensors are embedded

  24. Engineering Analysis-Insert • Pullout force in ABS plastic is 900lbf • Assume fluid pressure of 2000psi (higher than burst pressure of EJ) • For .25 diameter thread, OD is .391

  25. Temperature Isolation of Pressure sensor • May not be able to find a pressure sensor that can withstand the temperature EJ does • Can use a tube protruding from EJ to dissipate heat • A stainless steel tube would need to extend at least 6 in out for our applications

  26. Instructions/Example Code • SD Card: • http://learn.adafruit.com/adafruit-micro-sd-breakout-board-card-tutorial/wiring • Analog Input to SD Card • http://arduino.cc/en/Tutorial/Datalogger • Displaying to a LCD Display • http://arduino.cc/en/Tutorial/LiquidCrystalSerial

  27. Connection Diagram to LED Screen

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