电阻式压力敏感阵列足底压力测量及噪声滤除方法研究

A Pressure Mapping System Based on Piezoresistive Array and Noise Reduction

介绍了一种电阻式压力分布测量系统,通过采用零电势电路有效地抑制了阵列间的串扰。分析了系统的噪声机制,针对噪声特性提出一种混合噪声滤波算法———改进的IMF中值滤波方法。算法首先使用边界模板检测出脉冲噪声并通过中值滤波滤除;而后使用阈值自适应中值滤波方法滤除高斯噪声。实验结果表明本文提出的方法较已有方法具有更强的噪声滤除能力。

A piezo-resistive array based pressure mapping system is introduced. By means of zero-potential method, crosstalk among array elements can be effectively suppressed. Based on the analysis of the noise mechanism of the system, a hybrid noise filtering algorithms is proposed. Impulse noise is identified by using boundary template and removed by median filter firstly; then a threshold adaptive median filter is used to reduce Gaussian noise. Experiments results show that the proposed method demonstrates stronger capability in noise reduction compared with existing methods.