Design of a Plantar Pressure Insole Measuring System Based on Modular Photoelectric Pressure Sensor Unit
| Autor: | Jianwei Liu, Bin Ren |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
0209 industrial biotechnology
Computer science TP1-1185 02 engineering and technology Walking 01 natural sciences Biochemistry Signal Article Analytical Chemistry gait parameters 020901 industrial engineering & automation Gait (human) Calibration modular sensing unit Pressure Humans Electrical and Electronic Engineering Instrumentation Gait Simulation plantar pressure measurement business.industry Foot Chemical technology optical sensing principle 010401 analytical chemistry Reproducibility of Results Modular design Pressure sensor Atomic and Molecular Physics and Optics 0104 chemical sciences Power (physics) Exoskeleton Shoes Control system business |
| Zdroj: | Sensors (Basel, Switzerland) Sensors, Vol 21, Iss 3780, p 3780 (2021) Sensors Volume 21 Issue 11 |
| ISSN: | 1424-8220 |
| Popis: | Accurately perceiving and predicting the parameters related to human walking is very important for man–machine coupled cooperative control systems such as exoskeletons and power prostheses. Plantar pressure data is rich in human gait and posture information and is an essential source of reference information as the input of the exoskeleton control system. Therefore, the proper design of the pressure sensing insole and validation is a big challenge considering the requirements such as convenience, reliability, no interference and so on. In this research, we developed a low-cost modular sensing unit based on the principle of photoelectric sensing and designed a plantar pressure sensing insole to achieve the purpose of sensing human walking gait and posture information. On the one hand, the sensor unit is made of economy-friendly commercial flexible circuits and elastic silicone, and the mechanical and electrical characteristics of the modular sensor unit are evaluated by a self-developed pressure-related calibration system. The calibration results show that the modular sensor based on the photoelectric sensing principle has fast response and negligible hysteresis. On the other hand, we analyzed the area where the plantar pressure is densely distributed. One benefit of the modular sensing unit design is that it is rather convenient to fabricate different insole solutions, so we fabricated and compared several pressure-sensitive insole solutions in this preliminary study. During the dynamic locomotion experiments of wearing the pressure-sensing insole, the time series signal of each sensor unit was collected and analyzed. The results show that the pressure sensing insole based on the photoelectric effect can sense the distribution of the plantar pressure by capturing the deformation of the insole caused by the foot contact during locomotion, and provide reliable gait information for wearable applications. |
| Databáze: | OpenAIRE |
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