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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

Sijobert, Benoît and Benoussaad, Mourad and Denys, Jennifer and Pissard-Gibollet, Roger and Geny, Christian and Azevedo-Coste, Christine 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. (2015) Health, 7 (6). 704-714. ISSN 1949-4998

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Official URL: http://dx.doi.org/10.4236/health.2015.76084

Abstract

As low cost and highly portable sensors, inertial measurements units (IMU) have become increasingly used in gait analysis, embodying an efficient alternative to motion capture systems. Meanwhile, 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 gyrometer 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 instantaneous stride length and opens the way to promising applications.

Item Type:Article
Additional Information:Thanks to Scientific Research Publishing editor. The definitive version is available at : http://www.scirp.org/. How to cite this paper: Sijobert, B., Benoussaad, M., Denys, J., Pissard-Gibollet, R., Geny, C. and Coste, C.A. (2015) Imple-mentation and Validation of a Stride Length Estimation Algorithm, Using a Single Basic Inertial Sensor on Healthy Subjects and Patients Suffering from Parkinson’s Disease. Health, 7, 704-714. http://dx.doi.org/10.4236/health.2015.76084
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Other partners > Centre Hospitalier Régional Universitaire de Montpellier - CHRU Montpellier (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - INPT (FRANCE)
French research institutions > Institut National de la Recherche en Informatique et en Automatique - INRIA (FRANCE)
Other partners > Université de Montpellier 1 (FRANCE)
Other partners > Université de Montpellier 2 (FRANCE)
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Deposited By: Mourad Benoussaad
Deposited On:29 Jan 2016 14:31

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