基于压阻材料的电阻抗成像人体压力分布检测新方法研究

The body pressure distribution detection technology plays an important role in rehabilitation treatment and the assessment of curative effect for hemiplegia old people. At present, the body pressure distribution detection systems researching or using in domestic and foreign adopt the company's patented sensor array. So their price, production cost and maintenance cost are very high. They typically used in sports, clothing designing and pursue a high resolution ratio, high sensitivity, and so on. In addition, the structure of sensor array can also cause a lot of adverse effects. In view of this, considering the actual demand of hemiplegic patients, this project provides a new body pressure distribution detection method using electrical impedance tomography based on piezoresistors material. This method changes the pressure distribution into the internal resistivity resistance's variety of the piezoresistors material, applies a peripheral excitation current, then detects the voltage in surface of the pressure detection pad, and the resistivity distribution of pressure detection pad can obtained. According to the corresponding relationship between resistivity and pressure, the pressure distribution image of the pressure detection pad can be reconstructed. This method does not require using the sensor array, and it has a low cost of fabrication and maintenance, convenient and simple using suitable for correcting posture of hemiplegia old people. This method has very important scientific significance, practical value and broad prospects.

人体压力分布测量技术对于偏瘫老人的康复治疗和疗效评估有着十分重要的作用。目前国内外研发或使用中的人体压力分布检测系统，所用传感元件多是各公司的专利产品，价格昂贵，制作成本和维护成本都很高，通常用在运动体育，服装设计等方面，追求高分辨率、高灵敏度等高指标，且其传感器阵列的结构方式也会造成很多不利影响。针对于此，考虑到偏瘫患者的实际需求，本项目提出一种基于压阻材料的电阻抗成像人体压力分布检测新方法。该方法将压力分布转化为压阻材料内部电阻率的变化，在压力检测垫外围施加激励电流并检测表面电压，进一步通过电阻率图像重建方法获得压力检测垫内的电阻率分布，根据电阻率与压力的对应关系，重建出压力检测垫的压力分布图像。该方法不需使用传感器阵列，制作、维护成本低、方便简洁，适于偏瘫老人姿势矫正使用，具有十分重要的科学意义和实用价值，前景广阔。

人体压力分布测量技术对于偏瘫老人的康复治疗和疗效评估有着十分重要的作用。目前国内外研发或使用中的人体压力分布检测系统价格昂贵，制作成本和维护成本都很高，且其传感器阵列的结构方式也很容易造成损坏。本项目研究了一种基于压阻材料的电阻抗成像人体压力分布检测新方法，通过对新方法原理的分析，研究了压力分布和电阻率分布，电阻率分布和检测电压的对应关系，利用搭建的人体压力检测实验平台，重建了电阻率和压力的分布图像，考察了新方法的可行性。新方法不需使用传感器阵列，制作、维护成本低、方便简洁，适于偏瘫老人姿势矫正使用，具有十分重要的科学意义和实用价值，前景广阔。