Zhu H S, Harris G F, Wertsch J J, Tompkins W J, Webster J G
Rehabilitation Medicine Service, VA Medical Center, Milwaukee, MI 53295.
IEEE Trans Biomed Eng. 1991 Jul;38(7):710-4. doi: 10.1109/10.83573.
We have developed a portable microprocessor-based data-acquisition system to measure discrete plantar pressures within the shoe from ambulatory subjects. The system offers improved accuracy, repeatability, portability, and flexibility not available in current commercial systems. It consists of 14 conductive polymer pressure sensors, 14 analog amplifiers, an 8-bit analog-to-digital converter, a microprocessor, 120 kbytes of memory space, and a parallel I/O interface. Seven pressure sensors are embedded within each insole and located at the posterior heel, anterior heel, the four metatarsal heads, and hallux of each foot. The system is capable of continuously sampling 14 channels of pressure data for 7 min at a 20-Hz sample rate. The recorded data are downloaded into a microcomputer for further processing, analysis, and display. Foot pressures have been acquired from a sensate subject during multiple walking trials.
我们开发了一种基于便携式微处理器的数据采集系统，用于测量行走受试者鞋内的离散足底压力。该系统具有更高的准确性、可重复性、便携性和灵活性，这是目前商业系统所不具备的。它由14个导电聚合物压力传感器、14个模拟放大器、一个8位模数转换器、一个微处理器、120千字节的存储空间和一个并行I/O接口组成。每个鞋垫内嵌入七个压力传感器，分别位于每只脚的后脚跟、前脚跟、四个跖骨头和拇趾处。该系统能够以20赫兹的采样率连续采样14通道的压力数据7分钟。记录的数据被下载到微型计算机中进行进一步处理、分析和显示。在多次步行试验中，已从一名有感觉的受试者身上采集到足部压力数据。
