flaw echo

基本解釋

In this paper, a method of feature extraction of ultrasonic flaw echo signals is introduced, which is based on the theory of multilevel wavelet packet transform.
文章介紹了一種基于小波包變換的多尺度空間能量特征提取方法，并對(duì)實(shí)測(cè)的超聲缺陷回波信號(hào)進(jìn)行了特征提??；
Experimental study and theoretical analysis on evaluation of flaw echo features and mode recognition were carried out on the basis of three types of welding flaws.
以三種焊接缺陷為對(duì)象，研究了缺陷回波特征的評(píng)價(jià)與模式識(shí)別。
In the process of ultrasonic testing, the quality of flaw echo signals in A-scan lay a better determinant foundation for locational, quantitative and qualitative evaluation.
超聲檢測(cè)中缺陷回波信號(hào)的質(zhì)量是實(shí)現(xiàn)缺陷定位定量定性分析與評(píng)價(jià)的基礎(chǔ)，去噪是超聲檢測(cè)信號(hào)處理中很重要的環(huán)節(jié)。