Journal Published Online: 22 June 2023
Volume 51, Issue 6

Intelligent Detection to Laser Welding Seam Defect Using Adaptive Joint Wavelet Dictionary Learning of PEC Signal

CODEN: JTEVAB

Abstract

The pulsed eddy current (PEC) is an effective method for the online detection of laser welding seam defects. The joint wavelet dictionary learning method is proposed for solving the separation problem of the broad frequency harmonic and local non-smooth distortion of the PEC signal. The Haar and Gabor wavelet is adopted to be the basic function, which is extended to be the over complete wavelet dictionary library by cyclic migration. The sparse representation of the defect PEC signal is obtained by combining the joint wavelet dictionary with the orthogonal matching pursuit algorithm. The feature parameters of the PEC signal are calculated and inputted into the support vector machine to detect the laser welding seam defect intelligently. The validity of the proposed method is further verified by the experimental results, demonstrating the effectiveness of the classification identification and quantitative assessment of the pore and crack.

Author Information

He, Kuanfang
School of Mechatronic Engineering and Automation, Foshan University, Nanhai District, Foshan, Guangdong Province, China
Yong, Jiangfeng
School of Mechatronic Engineering and Automation, Foshan University, Nanhai District, Foshan, Guangdong Province, China
Zhou, Rongyu
School of Mechatronic Engineering and Automation, Foshan University, Nanhai District, Foshan, Guangdong Province, China
Liang, Jiahe
School of Mechatronic Engineering and Automation, Foshan University, Nanhai District, Foshan, Guangdong Province, China
Yang, Jingwei
School of Mechatronic Engineering and Automation, Foshan University, Nanhai District, Foshan, Guangdong Province, China
Jiang, Mian
School of Mechatronic Engineering and Automation, Foshan University, Nanhai District, Foshan, Guangdong Province, China
Shi, Wenqing
College of Electronics and Information Engineering, Guangdong Ocean University, Mazhang District, Zhanjiang, Guangdong Province, China
Qiao, Jiangwei
Guangdong Jinggong Steel Structure Co., Ltd, Sanshui District, Foshan, Guangdong Province, China
Lu, Qingbo
Guangdong Jinggong Steel Structure Co., Ltd, Sanshui District, Foshan, Guangdong Province, China
Pages: 16
Price: $25.00
Related
Reprints and Permissions
Reprints and copyright permissions can be requested through the
Copyright Clearance Center
Details
Stock #: JTE20220656
ISSN: 0090-3973
DOI: 10.1520/JTE20220656