基于小波变换的爆破振动信号分解与重构  

Decomposition and Reconstruction for Blast Vibration Signals Based on Wavelet and Wavelet Packet Theory

作　　者：赵建平[1] 徐国元[1] 李永刚[1] 

机构地区：[1]中南大学资源与安全工程学院,湖南长沙410083

出　　处：《江西有色金属》2007年第2期11-14,共4页Jiangxi Nonferrous Metals

基　　金：国家"十五"科技攻关滚动项目(2001BA609A-09-04)

摘　　要：针对非平稳爆破振动信号采用Fourier变换只能在时域或频域变换的问题,提出将时间和频率结合起来分析非平稳信号的方法——小波分析法。利用小波分析法对同一爆破振动信号采用不同小波基进行分析,说明了差异性。并通过不同的小波基对实测的爆破振动信号的分解与重构,以重构误差的大小确定最优小波基。Non stationary random signal can only transfer time domain method or frequency domain method if Fourier transformation is adopted. But wavelet transformation method can combine time domain and frequency domain together to analyze non stationary random signal. non stationary random signal. The same blast vibration So wavelet transformation method is adopted to analyze signals are analyzed by selecting different wavelet basis based wavelet transformation method and their difference have been stated. Decomposition and reconstruction for blast vibration signals through different wavelet base and reconstruction inaccuracy confirm optimum wavelet base.

关 键 词：小波变换 爆破振动信号 最优小波基 

分 类 号：TB553[理学—物理]