1. P08006: Physical Therapy Motion Tracking System Sponsor: National Science Foundation Customer: Nazareth Physical Therapy Clinic Josemaria Mora Electrical Engineer, Team Leader Eric DanielsonComputer Engineer Wade DaughertyElectrical Engineer Brian LeighElectrical Engineer Jen MalloryMechanical Engineer

2. MSDII - Project Review2 Project Description  Nazareth Clinic deals mostly with stroke patients  Developing a device to measure dynamic joint angles of the leg  High priority customer needs/engineering specifications: Measurement AccuracyMax angle ± 5% Does not alter movementSensor weight < 0.5 kg Pack weight < 2.5 kg Easy to use and setupMax setup time: 15 min Battery LifeDuration > 1 session

3. MSDII - Project Review3 Chosen Concept Design  See Poster

4. MSDII - Project Review4 Concept Overview  Gyroscopes are enclosed and attached using Electrode-Snap System  Angular velocity data from each sensor is transmitted to microcontroller  Data is sent to computer via Bluetooth  Angular displacement is calculated and displayed  Data is stored in database for future comparison of results

5. MSDII - Project Review5 Design Summary  MSP430 collects and sends data via Bluetooth  Attachment methods adequate  Data taken from gyroscopes relays pattern of motion, not angles  Met budget specifications  On-time completion of system

6. MSDII - Project Review6 Project Evaluation  Success Bluetooth communication MSP430 data collection Attachment methods Software GUI  Failures Measurement Accuracy: Max angle ± 5% Transfer Rate on laptop

7. MSDII - Project Review7 A Learning Experience  Execution of Idea  Handling Failure  Working on Limited Resources  Design Revised Using Gyroscope Full Scale Output Receiving data with less errors

8. MSDII - Project Review8 Noise Consideration  Good Signal to Noise Ratio ~.5/0.5=20dB  Noise was not White

9. MSDII - Project Review9 Gait Data

10. MSDII - Project Review10 Gait Cycle  Cycle starts with heel contact

11. MSDII - Project Review11 Ankle Angle  Scale: 70 º -95 º

12. MSDII - Project Review12 Knee Angle  Scale: 130 º -180 º

13. MSDII - Project Review13 Hip Angle  Scale: -1 º -3 º

14. MSDII - Project Review14 Simulated Stroke Walking Pattern

15. MSDII - Project Review15 Knee Angle Comparison

16. MSDII - Project Review16 Conclusion  Motion Tracking System was completed  Design had to be revised  Angular Speed presented to user  Improvements Pattern Recognition Algorithm Faster Sampling Rate Two-Leg System

17. MSDII - Project Review17 Questions?  Thank you for attending