Application of a system for measuring foot plantar pressure for evaluation of human mobility

Ewa Klimiec; Barbara Jasiewicz; Krzysztof Zaraska; Jacek Piekarski; Piotr Guzdek; Grzegorz Kołaszczyński

doi:10.1117/12.2245154

10 November 2016 Application of a system for measuring foot plantar pressure for evaluation of human mobility

Ewa Klimiec, Barbara Jasiewicz, Krzysztof Zaraska, Jacek Piekarski, Piotr Guzdek, Grzegorz Kołaszczyński

Proceedings Volume 10161, 14th International Conference on Optical and Electronic Sensors; 1016110 (2016) https://doi.org/10.1117/12.2245154
Event: 14th International Conference on Optical and Electronic Sensors, 2016, Gdansk, Poland

Abstract

The paper presents evaluation of human mobility by gait analysis, carried out in natural conditions (outside laboratory). Foot plantar pressure is measured using a shoe insole with 8 sensors placed in different anatomical zones of the foot, and placed inside a sports footwear. Polarized PVDF foil is used as a sensor material. A wireless transmission system is used to transmit voltage values to the computer. Due to linear relationship between force and transducer voltage, energy released during walking in arbitrary units can be calculated as integral of the square of transducer voltage over time. Gait measurements have been done over the next few days on healthy person during normal walking and slow walking. Performed measurements allow determination of walking speed (number of steps per second), gait rhythm and manner of walking (applying force to inside versus outside part of the sole). It is found that switching from normal to slow walk increases gait energy by 25% while the pressure distribution across the anatomical regions of the foot remains unchanged. The results will be used for developing a programme for evaluation of patients with cardiac failure and future integration of actimetry with pulse and spirometry measurements.

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Ewa Klimiec, Barbara Jasiewicz, Krzysztof Zaraska, Jacek Piekarski, Piotr Guzdek, and Grzegorz Kołaszczyński "Application of a system for measuring foot plantar pressure for evaluation of human mobility", Proc. SPIE 10161, 14th International Conference on Optical and Electronic Sensors, 1016110 (10 November 2016); https://doi.org/10.1117/12.2245154

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KEYWORDS

Sensors

Gait analysis

Data analysis

Transducers

Ferroelectric polymers

Amplifiers

Chemical vapor deposition

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