1. Propulsiometer Instrumented Wheelchair Wheel Prepared by: Seri Mustaza (BME) Siti Nor Wahida Fauzi (BME) Ahmad Shahir Ismail (EECE) Hafizul Anwar Raduan (CompE) Advisor: Dr. W Mark Richter (PhD, Director of Research and Development, MAXmobility)

2. MAXmobility FitSki ergonomic adjustable water ski Accessible wheelchair treadmill Basically, working with ergonomic wheelchair:  Propulsiometer instrumented wheelchair wheel  Transfer friendly wheelchair  Variable Compliance Hand-Rim Prototype (VCHP)  Effective ways to propel the wheel

3. Background Repetitive movement of arm can cause stress injuries. Provide strategies to reduce the likelihood of developing injuries. Measured forces and moments on hand

4. Propulsiometer Located on tubular hoop that can be mounted on different sizes of wheelchair’s wheel. To access the load applied by manual wheelchair user. Consist of DAQ, load cell, wireless transmitter, battery, DC/DC converter, sensor.

5. Propulsiometer Viasat MiniDAT™ Battery Sensor Load Cell DC/DC Converter

6. Data Collected Angle vs. time Moments Force vs. time:  Fx  Fy  Fz

7. Data collected from propulsiometer to the PC Force, Torque, & Moments Wheel angle

8. In depth MiniDAT™  16-bit resolution  16 single ended or 8 differential analog inputs  8 digital I/O lines  IEEE 802.11 wireless LAN  Uses 15V DC voltage  7.9 x 4.2 x 1.42 inches (LWH)  Weight = 1.5lb  Cost = $4,625.00

9. Solutions 12-Bits A/D converter Wireless transceiver (2.4-2.53 GHz) Power regulator

10. Specific Goals Size: 2 x 2 x 0.5 inches (LWH) Weight: ~0.25lb Cost: less than $500.00

11. V-Link One of the pre-packaged product Meets all the requirement Cost = $2,395.00 Study purpose

12. Circuit Schematic of V-Link

13. Target Microcontroller Specifications 7 analog channels and 1 digital channel A/D with 12 bit resolution 1 quadrature encoder input Wireless capability Sampling rate of at least 10 kHz Accepts voltage signal of -5/+5 volts Power consumption ~5 watts Small and compact

14. Guidelines JanuaryFebruaryMarchApril First half:  start focusing on the budget  contact with desired manufacturers  meet Mark on regular basis (once a week)  study BASIC Stamp© modules First half:  gather best possible solutions for chips  Wireless transceiver  power supply and power regulator  meet Mark on regular basis (once a week) First half:  make changes to prototype if needed  start build the DAQ  build the propulsiometer  putting things together on the PCM board (custom made)  start working on the interface  meet with Mark (if needed) First half:  preparing for the last presentation with Prof Paul King  finalize our work Second half:  preparing for the second presentation with Prof Paul King  study V-link and basic chip technology (AD chip, quadrature encoder, and what else that should be embedded)  understand requirement of each step  meet Mark on regular basis (once a week) Second half:  preparing for the third presentation with Prof Paul King  Start purchasing necessary chip and compartment to build the DAQ  start constructing the DAQ prototype.  test the prototype  meet Mark on regular basis (once a week) Second half:  preparing for the fourth presentation with Prof Paul King  test the propulsiometer  continue on interface  start on offset Second half:  continue on finalizing our work  prepare for the Senior Design Day (poster)  compile and present design poster and final results