Earl Grey and The Boston Tea Party - PowerPoint PPT Presentation

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Earl Grey and The Boston Tea Party

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  1. Earl Greyand The Boston Tea Party Present The Entourage

  2. Team Members • Casey Gold • Ellen Prommersberger • Nathan Winder • Steven Anderson • Tom Monikowski Ellen

  3. Purpose • Ease tedium of stop-and-go traffic • Improve safety of rush hour driving Ellen

  4. Objectives • Use sensors to determine position of car relative to other vehicles • Control acceleration and breaking based on distance away from leading vehicle • Control steering to follow lead car • Demonstrate concept on RC vehicle Ellen

  5. Concept Ellen

  6. Turning the Car Ellen

  7. System Overview Casey

  8. System Architecture Casey

  9. M68HC11E Microcontroller • Availability • Features • Built in RAM and ROM • Serial communications interface (SCI) • Synchronous serial peripheral interface (SPI) • 8-channel, 8-bit analog-to-digital (A/D) converter • Plenty of I/O Casey

  10. Sensors • Ultrasonic • Range: 1’ 10”– 50’ • Accuracy: 99.5% • Beam width: 5° Tom

  11. RC Car Interface • Steering • Incremental adjustment system • D/A circuitry • Speed Control • Maintain following distance relative to speed • Constantly monitor speed of vehicle • Manual Override • Disengages with driver input • ENGAGE/DISENGAGE button Tom

  12. User Warning Output • Status light on electronics box • Green LED • Status light on RC car • Blue LED • Warning light on RC car • Yellow LED • Audio warning on RC car • Audio circuit • Amplifier Tom

  13. Software • Accept values from sensors • Interpret as distances or hits/misses • Conditionally determine the course of action • Speed and turning • Handle user warnings Tom

  14. Power System • Battery power • Sensors • System • RC car • Choppers • Step up/Step down • Ensure proper voltages and currents Steve

  15. Schedule Steve

  16. Division of Labor • Casey – FPGA/Processor Setup, Programming • Ellen – Controls, Sensors, Quality Control • Nathan – Controls, Sensors, Construction • Steven – Power, Construction, Circuit Design • Tom – Math, Power, Programming Steve

  17. RISKS Sensors May not work as anticipated Steering RC car operation Reaction speed Signal processing Software/Hardware interaction CONTINGENCY PLAN Sensors Add focusing beam deflector Steering Manual override of steering in difficult situations RC car operation Modify car Reaction speed Use fewer sensors More efficient code Risks and Contingency Plan Nathan

  18. Materials • RC Escalades (2) • CPU • FPGA • Ultrasonic Sensors (7) • RAM • Flash ROM • Prototyping materials • Battery Nathan

  19. Extra sensors Programming for highway driving (higher speeds) More accurate sensing for nonstandard vehicles NOS Wet or dry shot? Five 10” LCD screens Streetglow Blue Blinking? Possible Additions Nathan