A validation test of a simple method of stride length measurement only with inertial sensors and a preliminary test in FES-assisted hemiplegic gait

Takashi Watanabe, T. Miyazawa

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)

Abstract

The purpose of this study was to test stride length measurement only with inertial sensors to for the simple gait evaluation system developed in our previous study to support rehabilitation, healthcare and so on. In this paper, a calculation method of the stride length was developed, in which acceleration and angular velocity signals of the foot were used. The integration period of the acceleration for calculation of each stride length was automatically detected by the acceleration signal. First, the measurement method was evaluated in 10 m walking of 6 neurologically intact subjects. The average values of error and absolute error of measured stride lengths were 0.38±4.77% and 3.36±3.04%, respectively. Correlation coefficient of the measured length with the reference data was 0.910 and the slope of the regression equation was 0.978. Then, stride lengths of a hemiplegic subject were measured in 10 m walking with and without FES-assisted foot drop correction. Although there was no difference in stride length between with and without the FES-assist, the calculated data from inertial sensor signals supported that the time for 10 m walking measured by therapists decreased when the subject walked with the FES-assist. It was expected that the stride length measurement only with inertial sensor would be practical, and it can be implemented easily.

Original languageEnglish
Title of host publicationWorld Congress on Medical Physics and Biomedical Engineering, 2015
EditorsDavid A. Jaffray
PublisherSpringer Verlag
Pages1111-1114
Number of pages4
ISBN (Print)9783319193878
DOIs
Publication statusPublished - 2015
EventWorld Congress on Medical Physics and Biomedical Engineering, 2015 - Toronto, Canada
Duration: 2015 Jun 72015 Jun 12

Publication series

NameIFMBE Proceedings
Volume51
ISSN (Print)1680-0737

Other

OtherWorld Congress on Medical Physics and Biomedical Engineering, 2015
CountryCanada
CityToronto
Period15/6/715/6/12

Keywords

  • FES
  • Foot drop
  • Gait
  • Inertial sensor
  • Stride

ASJC Scopus subject areas

  • Bioengineering
  • Biomedical Engineering

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