基于EMFi薄膜的动态足底压力测量系统

为测量与分析运动员运动过程中动态足底压力变化，优化训练模式与避免其运动损伤，该文研制了一种新型可穿戴式动态足底压力测量系统。以压电驻极体薄膜(EMFi)为传感材料，采集足底16个点的压力信号，原始电荷信号经过高速模拟开关、电荷放大电路、低通滤波放大电路、工频滤波电路、STM32F4内部A/D采集，并由2.4 GHz无线发送至上位机。实验结果显示，该系统测试结果与人体正常运动步态变化趋势一致，且具有良好的动态响应和可靠性，为运动员的姿态矫正提供了理论依据。

Dynamic Plantar Pressure Measurement System Based on EMFi Film

In order to measure and analyze the dynamic plantar pressure change during the athlete''s motion process, then optimize the training mode and avoid sports injury, a new wearable dynamic plantar pressure measurement system is developed in this paper. The piezoelectric electret film (EMFi) is used as the sensing material to collect the pressure signals of the 16 points on the foot. The original charge signal is collected by the high speed analog switch, the charge amplifier circuit, the low pass filter amplifying circuit, the power frequency filter circuit, and the STM32F4 internal A/D acquisition, finally is transmitted to PC by 2.4 GHz wireless. The experimental results show that the test results of this system are consistent with the variation trend of normal human gait, and have good dynamic response and reliability, which provides a theoretical basis for the attitude correction of athlete.