中國有色金屬學報(英文版)
Transactions of Nonferrous Metals Society of China
| Vol. 8 No. 3 September 1998 |
FEATURE ANALYSIS AND EXTRACTION OF INNER DEFECTS FOR SPOT WELD NUGGET OF ALUMINUM ALLOY
Gang Tie1 and Shen Chunlong1 Gong Runli2
（1.National Key Laboratory of AWPT,Harbin Institute of Technology, Harbin 150001, P. R. China
2.Inspection Branch of State Factory159, Beijing100074, P. R. China）
Abstract:The information and data reflecting inner defects in spot welding nugget of aluminum alloy were obtained by edge extracting and tracking to binary image. Based on the K-L transformation, the major and minor axes of defects were calculated, and the distribution of defects in spot welds were described. Based on the above mentioned, a preliminary analysis of defect features was carried out.
Key words: spot welding nugget defect K-L transformation feature analysis
