文献类型：会议论文

英文题名：Simulation Analysis and Quantitative Detection based on Laser Welding Seam Defects with PEC Technique

作者：He, Kuanfang[1];Si, Yin[1];Xia, Zixiong[1];Yong, Jiangfeng[1];Liang, Jiahe[1];Shi, Wenqing[2]

机构：[1]Foshan Univ, Sch Mechatron Engn & Automat, Foshan, Peoples R China;[2]Guangdong Ocean Univ, Coll Elect & Informat Engn, Zhanjiang, Peoples R China

会议论文集：7th International Conference on Condition Monitoring of Machinery in Non-Stationary Operations (CMMNO)

会议日期：JUN 11-13, 2021

会议地点：ELECTR NETWORK

语种：英文

外文关键词：Laser welding seam; Structural defect; Pulse eddy current; Simulation calculation; Quantitative detection

外文摘要：Pulse eddy current (PEC) testing has the technical characteristics of fast response, wide frequency range and non-contact, which is an effective means to achieve non-destructive testing of laser welding structural defects. According to the principle of PEC detection, a finite element model of PEC detection for laser welding seam defects is established. For the PEC differential response signal obtained by simulation. the six types of feature values are proposed, including peak value (P), time of peak value(TP), peak and rising curvature ratio(PRCR), fundamental amplitude (AF), amplitude ratio of fundamental and third harmonic (AFR)and marginal sprctrum peak value(MSP) based on Hilbert-Huang transform (HRT). Next, the features are calculated and analyzed, which are selected as the input of the support vector machine (SVM), and the laser welding seam defect structure defect are identified and evaluated, which provides a new way for the non-destructive testing of weld defects in the laser welding seam process.