关键词: 足底压力, 气压传感器, 优化分析, 分区测量, 气囊结构

Abstract: In order to detect the plantar pressure distribution of human body under static and dynamic conditions,a human plantar pressure distribution measurement system based on airbag structure is built to address the problems of poor wearing comfort,high cost,short life span,poor reliability and large size of existing devices.Firstly,the human walking gait characteristics,foot inversion and plantar pressure characteristics are employed to divide the plantar pressure distribution measurement system into regions; secondly,the thickness of the airbag unit body is simulated and iteratively calculated to design a hemispherical shell structure of the airbag unit body; then the data acquisition part of the plantar pressure distribution system region is designed in hardware; thirdly,the calibration and error analysis of the divided measurement regions are performed; finally,the calibration and error analysis of each measurement area are carried out,and the plantar pressure distribution of human body under static and different gait is measured.The experimental results show that the plantar pressure distribution measurement system has a hysteresis error of 2.8%,a repeatability error of 1.77%,and an average measurement error of 1.91%,which can measure the distribution of plantar pressure under static conditions with high accuracy and can classify the human gait under dynamic conditions.The study may provide a certain scientific basis for gait research,rehabilitation training,and balance assessment.