基于小波分析的TDR信号滤波与去噪  

FILTERING AND NOISE CANCELING OF TDR SIGNAL BASED ON WAVELET TRANSFORM

作　　者：胡静[1] 李新平[1] 瞿伟廉[1] 

机构地区：[1]武汉理工大学土木工程与建筑学院,武汉430070

出　　处：《工业建筑》2007年第12期84-87,95,共5页Industrial Construction

摘　　要：为去除TDR法岩土体变形监测信号中因多种原因而产生的噪声,同时最大限度地保留岩土体因变形而导致的微弱反射信号,提出结合小波函数和TDR监测信号特点的滤波与去噪方法。其工程应用表明:该方法在分析TDR监测信号时,能通过对信号的高通滤波和无用噪声的消除,在重新构造的新信号中较准确凸现隐含于原始输出信号内部的异常信号。相对于单纯用小波变换信号后某一尺度细节信号来分析岩土体变形局部特征的方法而言,该方法含义更为明确,且能更好地突出岩土体变形失稳位置(或失稳区域)。In order to cancel the noise in TDR signal and retain the faint reflectometry signal made by deformation of rock and soil, it is proposed to use method integrated filtering and noise canceling based on wavelet transform with characteristic of TDR signal. One engineering case showed that useful signal implicated ean be visualized highlightly by using this method. The method is more clearly and more useful than other method which only using some kinds of detail signals acquired by simple wavelet transform.

关 键 词：变形监测 时域反射法 小波变换 滤波消噪 

分 类 号：TU196.1[建筑科学—建筑理论]