基于“能量比较法”的金属基复合材料缺陷信号特征提取

Extraction of Defect Features of Metal Matrix Composite Based on "Energy-comparison"

将小波包多分辨率分析与能量谱相结合,提出了一种复合材料缺陷特征提取的方法—“能量比较”法。以金属基复合材料超声信号为例,运用“能量比较法”进行了缺陷信号特征提取,试验表明此方法是一种行之有效的新方法,为复合材料缺陷检测与识别开拓了新的思路。

A method of extraction of defect features of metal matrix composite by combining multi - resolution signal decomposition of the wavelet packet with energy spectrum is suggested. The method is called ＂energy - comparison＂. As a example, the defect signal of metal matrix composite is processed with the method and its features are extracted by using the method of ＂energy - comparison＂. And it is shown that the method is effec- tive for extraction and recognition. The method develops a new direction for extraction and recognition of the defect of composite material.