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Android platform for realtime gait tracking using inertial measurement units

Pablo Aqueveque, Sergio Sobarzo, Francisco Saavedra, Claudio Maldonado, Britam Gómez
  • Sergio Sobarzo
    Electrical Engineering Department, University of Concepcion, Chile
  • Francisco Saavedra
    Electrical Engineering Department, University of Concepcion, Chile
  • Claudio Maldonado
    Electrical Engineering Department, University of Concepcion, Chile
  • Britam Gómez
    Electrical Engineering Department, University of Concepcion, Chile

Abstract

One of the most important movements performed by the humans is gait. Biomechanical Gait analysis is usually by optical capture systems. However, such systems are expensive and sensitive to light and obstacles. In order to reduce those costs a system based on Inertial Measurements Units (IMU) is proposed. IMU are a good option to make movement analisys indoor with a low post-processing data, allowing to connect those systems to an Android platform. The design is based on two elements: a) The IMU sensors and the b) Android device. The IMU sensor is simple, small (35 x 35 mm), portable and autonomous (7.8 hrs). A resolution of 0.01° in their measurements is obtained, and sends data via Bluetooth link. The Android application works for Android 4.2 or higher, and it is compatible with Bluetooth devices 2.0 or higher. Three IMU sensors send data to a Tablet wirelessly, in order to evaluate the angles evolution for each joint of the leg (hip, knee and ankle). This information is used to calculate gait index and evaluate the gait quality online during the physical therapist is working with the patient.

Keywords

Inertial measurement units; Gait analysis; Android platform

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Submitted: 2016-07-06 12:18:18
Published: 2016-09-13 00:00:00
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Copyright (c) 2016 Pablo Aqueveque, Sergio Sobarzo, Francisco Saavedra, Claudio Maldonado, Britam Gómez

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This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.
 
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