文章基本信息

标题：Implementation and Validation of a Stride Length Estimation Algorithm, Using a Single Basic Inertial Sensor on Healthy Subjects and Patients Suffering from Parkinson’s Disease
本地全文：下载
作者：Benoît Sijobert 1* , Mourad Benoussaad 1 , Jennifer Denys 1 , Roger Pissard-Gibollet 2 , Christian Geny 3 , Christine Azevedo Coste
期刊名称：Health
印刷版ISSN：1949-4998
电子版ISSN：1949-5005
出版年度：2015
卷号：07
期号：06
页码：704-714
DOI：10.4236/health.2015.76084
语种：English
出版社：Scientific Research Publishing
摘要：As low cost and highly portable sensors, inertial measurements units (IMU) have become increas-ingly used in gait analysis, embodying an efficient alternative to motion capture systems. Mean-while, being able to compute reliably accurate spatial gait parameters using few sensors remains a relatively complex problematic. Providing a clinical oriented solution, our study presents a gy-rometer and accelerometer based algorithm for stride length estimation. Compared to most of the numerous existing works where only an averaged stride length is computed from several IMU, or where the use of the magnetometer is incompatible with everyday use, our challenge here has been to extract each individual stride length in an easy-to-use algorithm requiring only one inertial sensor attached to the subject shank. Our results were validated on healthy subjects and patients suffering from Parkinson’s disease (PD). Estimated stride lengths were compared to GAITRite© walkway system data: the mean error over all the strides was less than 6% for healthy group and 10.3% for PD group. This method provides a reliable portable solution for monitoring the in-stantaneous stride length and opens the way to promising applications.
关键词：Inertial Measurement Unit (IMU); Stride Length; Gait Analysis; Parkinson’s Disease; Biologging