基于小波分析的结肠蠕动压力信号提取方法

Extraction of Colon Peristalsis Pressure Signal Based on Wavelet Analysis

为了获取纯净的结肠蠕动信号,提出了一种基于小波分析的结肠蠕动压力信号提取方法.其中,对结肠压力信号进行5层的小波分解,去除干扰信号后重构信号,进而获得结肠蠕动压力信号.同时,针对异常的结肠压力数据进行了验证实验.结果表明:所提出的方法对异常的结肠压力信号具有很好的抑制效果,并可以保留结肠蠕动压力信号的细节特征;与含突变信号的结肠蠕动压力信号相比,所提取的结肠蠕动压力信号的信噪比较高、均方误差较低.

In order to obtain the pure peristalsis pressure signal of the colon,a method for extracting the peristalsis pressure signal of the colon based on wavelet analysis was proposed in this paper.The colonic pressure signal was decomposed into five levels and the peristalsis pressure signal of the colon was reconstructed after detaching the interference signal.Besides,an experiment for eliminating abnormal data was conducted.The results showed that not only the abnormal colonic pressure signal was inhibited effectively,but also the detail characteristics of the colonic peristalsis pressure signals were maintained by using the proposed method.Compared with the peristaltic pressure signal containing interference signal,the extracted signal had higher signal noise ratio and lower mean square error.