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Open AccessArticle

A New Automatic Foot Arch Index Measurement Method Based on a Flexible Membrane Pressure Sensor

State Key Laboratory of Fluid Power and Mechatronic Systems, Zhejiang University, Hangzhou 310027, China
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Sensors 2020, 20(10), 2892; https://doi.org/10.3390/s20102892
Received: 1 May 2020 / Revised: 17 May 2020 / Accepted: 18 May 2020 / Published: 20 May 2020
(This article belongs to the Special Issue Sensors for Gait, Posture and Health Monitoring)
The foot arch index is an important index to evaluate the health of human feet and the biomechanics line, aiming at addressing the shortcomings of the low efficiency and slow speed of manual foot arch index measurement; in this work, an automatic foot arch index measurement method based on a flexible membrane pressure sensor was proposed. The distribution of plantar pressure data was obtained from the flexible membrane pressure sensor and converted into a digital image. The 8-neighborhood correlation pixel method was proposed to remove the interference of isolated noise points. In order to remove the toes’ data without affecting the foot sole data, the row element association algorithm was proposed. The front and back endpoints of the foot were automatically located to obtain the foot length, and the foot arch index was also automatically obtained based on the foot arch pressure area. Whether it was a high arch foot, flat foot or normal foot, the method proposed in this paper could accurately and quickly distinguish them. The prototype was developed, and its feasibility and validity were verified by a series of tests. View Full-Text
Keywords: foot arch index; flexible membrane pressure sensor; plantar pressure; image processing; 8-neighborhood correlation pixel; row element association; high arch foot; flat foot foot arch index; flexible membrane pressure sensor; plantar pressure; image processing; 8-neighborhood correlation pixel; row element association; high arch foot; flat foot
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Zheng, T.; Yu, Z.; Wang, J.; Lu, G. A New Automatic Foot Arch Index Measurement Method Based on a Flexible Membrane Pressure Sensor. Sensors 2020, 20, 2892.

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