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Actively Stabilized Hand Held Laser Pointer May 8, 2014

Kaitlin Peranski Spencer Wasilewski Kyle Lasher Kyle Jensen Chris Caporale Jeremy Berke. Actively Stabilized Hand Held Laser Pointer May 8, 2014. Agenda. Layout/CAD Models System Diagrams Test Bench Test Results BOM/Purchase List Future Development Technical Manual.

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Actively Stabilized Hand Held Laser Pointer May 8, 2014

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  1. Kaitlin Peranski Spencer Wasilewski Kyle Lasher Kyle Jensen Chris Caporale Jeremy Berke Actively Stabilized Hand Held Laser PointerMay 8, 2014

  2. Agenda • Layout/CAD Models • System Diagrams • Test Bench • Test Results • BOM/Purchase List • Future Development • Technical Manual

  3. Prototype Layout

  4. Housing Push Button to turn on laser (Hold down to turn laser on) Turns Correction On (Forward-on) Processor USB/ Charging Port Main Power (Forward-on) NST Controller Access Charging LED (Yellow- Charging Green- Charged) Processor LED (On When Correcting)

  5. CAD Models

  6. Use Instructions • Gyroscope Calibration: • Turn module on, and leave on a stable surface until the processor led blinks. Moving the module during this process will cause the module to not calibrate properly, resulting in possible drift. • Battery Charging: • Turn module on • Plug in micro USB Cable • Yellow light on charging module will turn green when the battery is fully charged

  7. Logic Flow Chart

  8. Wiring Diagram

  9. Test Bench • Approximates a sine wave from 4 to 20 Hz • Solid state relay triggering system for solenoid actuators • Adjustable amplitude using duty cycle • Integrated gyroscope DAQ • Thermistor DAQ

  10. Test Results • Accelerometers versus Gyroscopes • Extended Runtime • Response Time • Effectiveness using Test Bench • Effectiveness using Target • Survey

  11. Engineering Requirements with Results

  12. Accelerometers VS Gyroscopes Beyond 80 cm, or 31.5 in, gyroscopes begin to out sense over accelerometers.

  13. Extended Runtime Testing Total Runtime:10.1Hours

  14. Extended Runtime Testing

  15. Response Time Prototype: • The code was run for 10 seconds • The average time it took to run through the code was 1.4 ms NST Module: • The Pathways performance logger was used to determine response time to a step response • Before update – 300 ms forward, 70 ms reverse • After update – 40 ms forward, 20 ms reverse

  16. Response Time NST Module: • While the teensy was sending commands to simulate a sine wave the performance logger was run • Response time – 3.4 ms

  17. Effectiveness using Test BenchWithout Firmware Update

  18. Effectiveness using TargetWithout Firmware Update Possible Drift** No Drift • Data Sets: • No Drift = {69.75, 20.06, 24.39, 47.06, 56.74, 44.64} • Possible Drift = {-13.95, 9.65, 36.18, 25.76, 43.98} • Extreme Drift = {-145.65} • Averages: • ND&PD&ED = 16.85% • ND&PD = 33.11% • ND = 45.60% **Drift in image is due to incorrect calibration of gyroscope

  19. Ease of Use/Ergonomics Survey

  20. Ease of Use/Ergonomics Survey • Comments: • Module is hard to aim when the correction algorithm activated at the same time as the button press. • This led us to add a slight delay from when the button is pressed to when the correction activates • User did not know when the correction was turned on without looking at the switch • Led to us adding an LED light on the Teensy processor

  21. Final Prototype BOM

  22. Final Purchase List • Started with a $1,000 budget • Propose to spend remaining money on practical items

  23. **These items have already been accounted for in our purchase list. Additional Items to Purchase**: • Total: $101 • Micro USB Cable • Sparkfun: $5 • Mini USB Cable • Sparkfun: $4 • Universal Laptop AC Power Adapter • Amazon: $15 • Triple Axis Digital Output Gyroscope • Sparkfun: $25 • Micro Lipo USB LiPoly Charger X 2 • Adafruit: $12 • Teensy 3.1 + Header X 2 • Adafruit: $40

  24. Future Development • Improve Packaging • Component layout • More ergonomic • Better Quality Gyroscope • Easier calibration • Less drift • More accurate • Integration of Processors • Add gyroscope onto NST module • Use single processor • Continuous data and corrections • Reduce overall response time • Improve response of NST’s mechanical system to meet a target of 2.6 ms • Add damping to test bench • Better method to image process when using test bench • Investigate setting of limits (calibration algorithm) • Ignore any jitters below 2 Hz and focus on canceling between 2 and 20 Hz

  25. Technical Manual • Drawing Package • Wiring Diagram • Processor Code with Notes • Current Related Patents • Use Instructions • Final BOM and Purchase List • Testing Results and Data

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