Abstract:

In order to improve the accuracy of foot plantar pressure acquisition and reduce the influence on the experimenter’s natural gait during the measurement, the improved design of plantar pressure acquisition system and the optimization of sampling timing are proposed, which can effectively reduce the noise interference introduced by the sensor and the circuit system, and finally realize the sampling measurement of large size (71.9 cm × 33.5 cm) and high spatial resolution (2.8/cm², a total of 6720 sensor units) plantar pressure sensing system with the sampling rate of 100 SPS. The system is used to test in the Department of Rehabilitation in Guangzhou First People’s Hospital. The collection and analysis of foot plantar pressure can be applied to the postoperative gait rehabilitation training, providing effective quantitative data reference for doctors to evaluate the rehabilitation of patients and formulate targeted treatment plans.

Key words: resistive pressure sensors, sensor array, foot plantar pressure, Sensor calibration, pressure image

摘要：

为提高足底压力采集的精度, 减少测量中对实验者自然步态的影响, 基于自主研发的平板式传感器, 开发了面向多传感单元的足底压力扫描系统。通过对压力采集系统结构的改进设计以及对采样时序的优化处理, 有效地减少了传感器及电路系统引入的噪声干扰, 实现了对大尺寸(71.9 cm×33.5 cm)、高空间分辨率(2.8个/cm², 共6720个传感单元)压力传感系统的设计实验, 实验中采样率为100 SPS。该系统已在广州市第一人民医院康复科进行测试与实验。该系统可应用于步态康复训练, 为医生评估患者康复情况和制订针对性的治疗方案提供有效的量化数据参考。

关键词: 压阻式传感器, 传感阵列, 足底压力, 传感器标定, 压力图像