Weld is the weakness of pressure vessel quality, and the weld defect directly affects the safe operation of pressure vessel. Time of Flight Diffraction (TOFD) detection is the main method of weld quality evaluation. With the rapid development of TOFD imaging detection technology, the lack of automatic interpretation of TOFD images is becoming an obstacle to the large-scale application of TOFD detection. Image processing and defect recognition are the key technologies of TOFD imaging detection. In this paper, TOFD image processing technology was summarized as noise removal, lateral wave processing, curve fitting and image segmentation, and TOFD defect recognition technology was summarized as feature extraction and pattern classification. The related research results at home and abroad were introduced in detail, and suggestions on the research of TOFD image segmentation, feature extraction and defect classification were discussed.
宋强,李海华,高国刚,等. 衍射时差图像处理与缺陷识别技术综述[J]. 科学技术与工程, 2021, 21(36): 15291-15300.
Song Qiang, Li Haihua, Guo Guogang, et al. Overview of Time of Flight Diffraction Image Processing and Defect Recognition Technology[J]. Science Technology and Engineering,2021,21(36):15291-15300.