flaw echo

常見例句

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，并對實測的超聲缺陷回波信號進(jìn)行了特征提?。?/li>
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象，研究了缺陷回波特征的評價與模式識別。
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.
超聲檢測中缺陷回波信號的質(zhì)量是實現(xiàn)缺陷定位定量定性分析與評價的基礎(chǔ)，去噪是超聲檢測信號處理中很重要的環(huán)節(jié)。