An Automatic Gait Feature Extraction Method for Identifying Gait Asymmetry Using Wearable Sensors

Sensors
Arif Reza AnwaryMichael Vassallo

Abstract

This paper aims to assess the use of Inertial Measurement Unit (IMU) sensors to identify gait asymmetry by extracting automatic gait features. We design and develop an android app to collect real time synchronous IMU data from legs. The results from our method are validated using a Qualisys Motion Capture System. The data are collected from 10 young and 10 older subjects. Each performed a trial in a straight corridor comprising 15 strides of normal walking, a turn around and another 15 strides. We analyse the data for total distance, total time, total velocity, stride, step, cadence, step ratio, stance, and swing. The accuracy of detecting the stride number using the proposed method is 100% for young and 92.67% for older subjects. The accuracy of estimating travelled distance using the proposed method for young subjects is 97.73% and 98.82% for right and left legs; and for the older, is 88.71% and 89.88% for right and left legs. The average travelled distance is 37.77 (95% CI ± 3.57) meters for young subjects and is 22.50 (95% CI ± 2.34) meters for older subjects. The average travelled time for young subjects is 51.85 (95% CI ± 3.08) seconds and for older subjects is 84.02 (95% CI ± 9.98) seconds. The results show that wearable...Continue Reading

References

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Citations

May 23, 2020·Physiological Measurement·Tomas BäcklundNina Sundström
Apr 21, 2021·The Journal of Hand Surgery, European Volume·Fredrik EngstrandSimon Farnebo
Oct 3, 2021·Scientific Reports·Julie SoulardNicolas Vuillerme
Nov 10, 2021·JMIR MHealth and UHealth·Julie SoulardNicolas Vuillerme
Oct 23, 2021·Physiological Measurement·Tomas BäcklundNina Sundström

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Methods Mentioned

BETA
feature extraction
features extraction

Software Mentioned

Android API
Qualisys
Matlab
SolidWorks
Android Studio
MetaWear CPro
Velcro
MetaWear
ZUPT

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