焊接缺陷的超声回波信号分析与最佳特征子集的选择

The ultrasonic echo signal analysis of welding flaw and the selection of optimum feature subset

本文针对超声检测中信号处理的特征提取问题，对实际焊接缺陷的超声回波进行了分析．在 此基础上，研究了超声回波特征的评价与最佳特征子集的选择，研究结果初步表明，本文提出的选择 方法是比较有效的，可以用于缺陷的识别与分类．

The ultrasonic echoes of real welding flaws are analyzed for feature extraction of signal processing. Evaluation of ultrasonic echo feature and selection of optimum feature subset are discussed. Preliminary experimental results show that, the method of feature selection expounded in this paper is relatively effective, and it could be used for the recognition and classification of flaws.