脉冲涡流无损检测信号滤波方法研究  

The Research of Method for Pulsed Eddy Current Nondestructive Detection of Signal Filtering

作　　者：王园园[1] 

机构地区：[1]商洛学院电子信息与电气工程学院,陕西商洛726000

出　　处：《商洛学院学报》2014年第6期37-40,共4页Journal of Shangluo University

摘　　要：为了得到高信噪比、低失真度的涡流无损检测信号,以Matlab为仿真工具,对滑动窗口滤波法、频域滤波法、小波滤波法进行模拟仿真,对比滤波效果,确定小波阈值滤波为最终滤波方法,滤波参数为:Coif 3小波基、3层小波分解、启发式阈值,滤波后信号信噪比高、局部特征保留完整。In order to obtain the eddy current nondestructive detection signals with high signal-noise ratio and low distortion, Matlab is used as a simulation tool to simulate the method of sliding-window filtering,frequency domain filtering method and wavelet filter method. Comparison of the filtering results is done with threshold filtering of wavelet. Filtering parameters are as follows：coif 3 small fundamental, three-layer wavelet decomposition, heursure and soft–threshold wavelet. Testing results indicate filtering results with high signal-noise ratio and low distortion.

关 键 词：脉冲涡流 无损检测 小波滤波 

分 类 号：TG115.28[金属学及工艺—物理冶金]