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An ultrasonic stride length measuring system employing two digital compasses
Hiromichi Maki1, Hidekuni Ogawa, Yoshiharu Yonezawa
1Hiroshima Institute of Technology, Japan.
Biomedical Sciences Instrumentation
|November 19, 2014
Summary
This study introduces a compact ultrasonic system for measuring human stride length during daily activities. The system accurately captures gait characteristics by analyzing ultrasonic and radio wave propagation differences.
Area of Science:
- Biomechanics
- Wearable Technology
- Gait Analysis
Background:
- Accurate human gait analysis is crucial for understanding mobility and health.
- Existing methods for measuring stride length can be cumbersome or limited in real-world application.
Purpose of the Study:
- To develop a novel, compact ultrasonic system for precise stride length measurement.
- To enable accurate characterization of human gait during daily activities.
Main Methods:
- A wearable system was designed with ultrasonic transmitters/receivers, digital compasses, and radio transmitters/receivers on shoes.
- Stride length was calculated using the time-of-flight difference of ultrasonic and radio waves.
- Gait direction was determined using digital compasses, and stride length was corrected accordingly.
Main Results:
- The system successfully measured stride length with high accuracy.
- Correction for walking direction improved the reliability of the measurements.
- Data was stored on an SD memory card for subsequent analysis.
Conclusions:
- The developed ultrasonic stride length measuring system offers a practical solution for unobtrusive gait analysis.
- This technology can be valuable for monitoring individual mobility and health status in everyday environments.
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