1. FSAE Instrumentation 1/27/09 Ryan Gunn John Lee Dan Van Winkle Ali Yilmaz

2. Formula SAE Intercollegiate competition New car every year Cars designed for non-professional auto cross racer Over 120 international teams

3. FSAE Competition Scoring

4. Data Acquisition System Tuning is important Driver feedback Quantitative baseline Support design decision Driver evaluation

5. Operational Concept Real time data capture Post Processing Real time data transmission* Simultaneous data capture and transmission* Data analysis and reduction New/additional power sources* *Goals

6. Flow of Data in Hardware

7. Sensor Selection Shock Position Sensor Accelerometer Wheel Speed Sensor Oil Pressure Sensor Steering Position Sensor

8. Sensor Selection

9. DAQ Requirements

10. DAQS Options MoTec AIM Sports National Instruments cRIO

11. Motec Pros: Ease of installation User Friendly GUI Cons: High cost ($4000-$6000 for data logging unit) Limited to Motec sensors Locked software

12. AIM Sports Pros: Cheaper than Motec More, cheaper sensors available than Motec Cons: Price (~$2000) Locked software

13. NI cRIO Pros: No cost for DACS or sensors Changeable LabVIEW code Modular  Customizable Cons: Programming

14. Notes All options provided: Weight requirement Free tech support Free software

15. Decision NI cRIO is best choice for this application Cost is a critical factor Performance/accessibility factors can be worked on

16. Wireless Transmission Daniel Alford, “Light Weight, Low Cost, Automotive Data Acquisition and Telemetry System" (MS thesis, University of Cincinnati, 2005) “The testing performed shows that the wireless networking technology does not adversely affect the data being transferred” Standard antenna not well suited (range) Line of sight issues are the major problem

17. Decision Wireless data transmission will not initially be pursued Data logging issues Dependability Time constraints

18. Power Consumption cRIO-20W Accelerometer 180 μA - 2.52 mW Oil Pressure - 40mW Brake Pressure – 25mW Rotary Potentiometer – 0.7mW Proximity Sensor – 200mW Total ~300mW ~1.8 Amperes

19. Comparing Batteries Current Battery ODYSS PC310 Drycell 2.87 AH/kg 8 AH Possible Alternatives Li Ion 11.4 AH/kg Stringent charging requirements

20. Accomplished Tasks Installed software tools Established connection with the cRIO Updated software on cRIO Tested real-time monitoring Tested data logging

21. Real-time Monitoring Significant lag Requires constant connection to car (Requires wireless) Useful for testing sensors and data acquisition code Cannot log data simultaneously (Memory issues) A nice to have

22. Testing Real-time Monitoring

23. Data Logging Currently must be connected to computer Switch to turn on and off Boot file More complex process than real-time monitoring Allows for future analyzing of data

24. Testing Data Logging

27. Instructions Created List of all modules necessary to run software How to connect to the cRIO