Related Experiment Videos
A telemetry-based velocometer to measure wheelchair velocity
A D Moss1, N E Fowler, V L Tolfrey
1Department of Exercise and Sport Science, Manchester Metropolitan University, Hassall Road, Alsager, Stoke-on-Trent, ST7 2HL, UK. a.d.moss@mmu.ac.uk
Journal of Biomechanics
|January 28, 2003
Summary
A new telemetry-based velocometer accurately measures wheelchair velocity. Studies confirmed its validity, dynamic response, reliability, and minimal resistance, making it a valuable tool for mobility research.
Area of Science:
- Biomedical Engineering
- Rehabilitation Technology
- Assistive Devices
Background:
- Accurate measurement of wheelchair velocity is crucial for research and clinical assessments.
- Existing methods for measuring wheelchair speed can be cumbersome or lack precision.
Purpose of the Study:
- To introduce and validate a novel telemetry-based velocometer designed for measuring wheelchair velocity.
- To assess the device's performance across key metrics including validity, dynamic response, reliability, and resistance.
Main Methods:
- The velocometer's performance was evaluated through five distinct studies.
- Measurements included comparisons against manual digitization, assessment of dynamic response during acceleration/deceleration, and reliability testing against motor speed.
- Mechanical resistance was quantified for both disc and spoke wheels.
Main Results:
- A strong linear relationship was observed between velocometer-calculated velocity and established test velocities.
- Average root mean square deviations (ARMSD) were low, indicating high accuracy (e.g., 0.06+/-0.01 ms(-1) at 1 ms(-1)).
- Dynamic response and reliability were excellent, with minimal deviations (e.g., <7% ARMSD for dynamic response, <0.41% for reliability).
Conclusions:
- The telemetry-based velocometer demonstrates high validity and reliability for measuring wheelchair velocity.
- The device exhibits good dynamic response and minimal mechanical resistance.
- This velocometer is a promising tool for objective assessment in wheelchair mobility research and clinical practice.