小波滤波方法在叠前偏移成像无损检测中的应用研究  

The Wavelet Filter Method in the Application of Prestack Migration Imaging Nondestructive Testing Research

作　　者：李忠芳[1] 

机构地区：[1]安徽科技学院机械工程学院,安徽凤阳233100

出　　处：《安徽科技学院学报》2014年第3期53-55,共3页Journal of Anhui Science and Technology University

基　　金：安徽科技学院自然科学研究项目(ZRC2010265);安徽省高校省级自然科学研究项目(KJ2011Z081);安徽省科技攻关计划重大项目(1301031030)

摘　　要：针对叠前偏移成像原始资料频率成分复杂,不利于数据分析和截面成像的问题,探索了小波滤波方法在工程结构叠前偏移成像无损检测方法中的应用。利用小波分解和重构方法处理在混凝土试件检测面采集到的某超声波,并将该方法应用到叠前偏移成像技术中,分别给出了利用在不同尺度下所重构信号进行偏移成像处理获得的无损检测结果。研究表明,选取与实际应力波信号主频基本一致的尺度的小波对超声波信号群进行重构,能够在一定程度上改变偏移成像处理剖面。In view of the raw data of the pre - stack migration imaging frequency composition is complicated and is not conducive to the problem of data analysis and cross section imaging. We explored the wavelet filter method in engineering structure application of pre - stack migration imaging nondestructive testing method. Using the wavelet decomposition and reconstruction method in the processing of concrete specimen surface ultrasonic waves, and applying the method to pre -stack migration imaging technology, nondestructive testing results were given by reconstructing signal processing of seismic migration imaging with different scales. Research shows that by selecting the scale consistent with the actual stress wave signal frequency for re - factoring, we can get the rel- ative ideal profile of migration imaging processing.

关 键 词：小波滤波 超声波 无损检测 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]