WANG Jie, ZHANG Zhifen, QIN Rui, et al.Identification of MIG Welding Burn-through Defects in Stainless Steel Sheet Based on Machine Learning[J].Electric Welding Machine, 2023, 53(9): 70-77.
WANG Jie, ZHANG Zhifen, QIN Rui, et al.Identification of MIG Welding Burn-through Defects in Stainless Steel Sheet Based on Machine Learning[J].Electric Welding Machine, 2023, 53(9): 70-77. DOI: 10.7512/j.issn.1001-2303.2023.09.09.
Identification of MIG Welding Burn-through Defects in Stainless Steel Sheet Based on Machine Learning
With the wide application of welding technology in industrial environment, more and more scholars pay attention to the study of welding defects. As one of the most serious defects in the welding process, the corresponding measures must be taken to monitor and control the burn-through defects. In this paper, a passive visual sensing technique is proposed to eliminate the strong arc light interference in the welding process by using industrial CCD camera combined with dimming and filtering system, then obtain MIG welding pool image. Based on the multi-dimensional features of the image, ten dimensional features corresponding to the four categories of molten pool image are extracted as the input of machine learning. During the label calibration of normal and burn-through defects, the image data of molten pool obtained from orthogonal test were preprocessed based on the proposed feature extraction, the invalid data were eliminated and the valid data were correctly classified by reverse search. Meanwhile, the spatial distribution of data was found. Finally, the recognition effects of the three classifiers under the input features of different dimensions were explored, and the results showed that the selected features obtained classification accuracy of no less than 97% on the three classifiers, which provided technical support and theoretical basis for the subsequent development of visual online burn-through defects detection system.
关键词
MIG焊视觉传感熔池图像处理机器学习缺陷识别
Keywords
MIG weldingvision sensingmolten pool image processingmachine learningdefect identification
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