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Wireless Prototype Based on Pressure and Bending Sensors for Measuring Gate Quality
Computer Science Department, ICAM University, 6 rue Auber-59000 Lille, France
DeustoTech-Life Unit, Deusto Institute of Technology, University of Deusto, Avda. de las Universidades,24, Bilbao 48007, Spain
* Author to whom correspondence should be addressed.
Received: 24 May 2013; in revised form: 25 June 2013 / Accepted: 10 July 2013 / Published: 29 July 2013
Abstract: This paper presents a technological solution based on sensors controlled remotely in order to monitor, track and evaluate the gait quality in people with or without associated pathology. Special hardware simulating a shoe was developed, which consists of three pressure sensors, two bending sensors, an Arduino mini and a Bluetooth module. The obtained signals are digitally processed, calculating the standard deviation and establishing thresholds obtained empirically. A group of users was chosen with the aim of executing two modalities: natural walking and dragging the left foot. The gait was parameterized with the following variables: as far as pressure sensors are concerned, one pressure sensor under the first metatarsal (right sensor), another one under the fifth metatarsal (left) and a third one under the heel were placed. With respect to bending sensors, one bending sensor was placed for the ankle movement and another one for the foot sole. The obtained results show a rate accuracy oscillating between 85% (right sensor) and 100% (heel and bending sensors). Therefore, the developed prototype is able to differentiate between healthy gait and pathological gait, and it will be used as the base of a more complex and integral technological solution, which is being developed currently.
Keywords: gait analysis; pressure sensors; bending sensors; Arduino; multiple sclerosis
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Grenez, F.; Villarejo, M.V.; Zapirain, B.G.; Zorrilla, A.M. Wireless Prototype Based on Pressure and Bending Sensors for Measuring Gate Quality. Sensors 2013, 13, 9679-9703.
Grenez F, Villarejo MV, Zapirain BG, Zorrilla AM. Wireless Prototype Based on Pressure and Bending Sensors for Measuring Gate Quality. Sensors. 2013; 13(8):9679-9703.
Grenez, Florent; Villarejo, María V.; Zapirain, Begoña G.; Zorrilla, Amaia M. 2013. "Wireless Prototype Based on Pressure and Bending Sensors for Measuring Gate Quality." Sensors 13, no. 8: 9679-9703.