焊接缺陷的超声回波特征分析与模式识别

The Analysis and Pattern Recognition of UltrasonicEcho Features for Weld Flaw

研究了以自回归模型谱为特征，进行焊接缺陷的超声回波模式识别的方法，根据线性判别原理建立了判别函数，利用所提取的特征值对焊接缺陷进行了模式分类，结果表明自回归模型谱在超声缺陷的模式识别中是一良好的特征量，各类目标具有比较清晰的类边界。

The pattern recognition method of ultrasontic echo of weld flaw has been analyzed with tbe features of auto-regression model spectrum. Based on the linear discriminatory principle, the discriminatory function is established. The pattem classification of weld flaw is carried out with the features extracted . The results show that, the auto-regression model spectra are good fea- tures in pattem recognition of weld flaws, and the flaw of every type has a clear class boundary.