flaw echo

常见例句

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.
文章介绍了一种基于小波包变换的多尺度空间能量特征提取方法，并对实测的超声缺陷回波信号进行了特征提取；
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.
以三种焊接缺陷为对象，研究了缺陷回波特征的评价与模式识别。
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.
超声检测中缺陷回波信号的质量是实现缺陷定位定量定性分析与评价的基础，去噪是超声检测信号处理中很重要的环节。