1. Positioning Sensor for Electric Motor Drive ENGR 498 Senior Design College of Optical Sciences Industrial Affiliates

2. Overview Team Introduction Project Introduction System level overview Optical subsystem Electronics subsystem Project Summary

3. Team Members Daniel Alfred (Mechanical) – Project Lead Robert Nunes (Electrical) – Electrical Tech Lead Matthew Sinclair (Optics) – Optical Tech Lead Tim Spriggs (Computer) – System Lead Tracy Law (Optics) Dr. Mike Nofziger – Mentor Kevin Prodromides – Sponsor Christopher Scales - Sponsor

4. What are our options? CostProblems Optical Encoder$$ Electrical Resolver$$$$ Magnetic Sensor$$$$Jet Fuel/Pressure Hall Effect Sensor$Jet Fuel Variable ResistorsNALongevity

5. Big Picture =+

6. Customer Needs/ Requirements Measure the position of an electric motor shaft with an accuracy of 1.4 degrees Three sinusoidal outputs Operate efficiently at low and high speeds (50-6000rpm) Signal output be compatible with the rest of the system Mechanical design integrates subsystems Submersed in pressurized jet fuel* Proof of concept

7. System Diagram

8. Outputs overview

9. Overall System

10. Optics Optical Design Size Size of design

11. Optics Optics allow for spatial filtering

12. Optics Through-focus spot size at the encoder disk Spot size at detector (16 mm away from disk)

13. Optics

14. Electronics Schematic Sensor A Sensor B 8 bit Position

15. Optics

16. Summary Goal: determine the position of the shaft Optical encoder Allows for spatial filter Digital circuitry with error bit Encapsulated housing

17. Questions and Concerns

18. Backups

19. Gantt Charts

20. Prototype Cost Focus areaCostParts Optics<$300 Laser diode, lenses, encoder disc Electronics<$80 ICs, OpAmps, diodes, resistors MechanicsTBD Mounting parts Miscellaneous<$40 Shipping

21. Optics Testing will be done by profiling the laser using a knife edge test. The beam will be approximated to be a Guassian for calculations

22. Optics Test Setup Knife edge will be scanned across beam Detector will measure power This will measure –Divergence –Beam waist

23. System flowchart

24. Transmission of Kerosene and JP8

25. Absorption curve for JP8