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作者:

Yan, Zhihong (Yan, Zhihong.) | Song, Yonglun (Song, Yonglun.) | Wang, Bin (Wang, Bin.) | Li, Yuanxiang (Li, Yuanxiang.)

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EI Scopus

摘要:

The computer evaluation of weld X-ray film is an attractive technique for weld seam NDT (nondestructive testing). To achieve this target, digitalization of film is the first step and automatic defect identification is another key technique.In this paper, a weld X-ray film digitalizing system has been established with linear array CCD and highlight LED light source. Its space resolution can reach 0.04 mm/pixel and scanning speed can reach 100 mm/s for an industrial film. The transfer function curves of the system have been measured and the results indicate that its image gray resolution can reach 88 G/D at 4.5D, and its dynamic range can be wider than 2.0D. In order to facilitate the evaluation of large welded structure, a panoramic evaluation algorithm is developed also. The algorithm includes image matching, image fusion and panoramic evaluation of the long linked film image. © 2011 Editorial Board of CHINA WELDING.

关键词:

Algorithms Image fusion Image matching Image processing Light emitting diodes Light sources Motion pictures Nondestructive examination Welded steel structures Welding Welds X ray films X rays

作者机构:

  • [ 1 ] [Yan, Zhihong]College of Mechanical Engineering and Applied Electronics Technology, Beijing University of Technology, Beijing 100124, China
  • [ 2 ] [Song, Yonglun]College of Mechanical Engineering and Applied Electronics Technology, Beijing University of Technology, Beijing 100124, China
  • [ 3 ] [Wang, Bin]College of Mechanical Engineering and Applied Electronics Technology, Beijing University of Technology, Beijing 100124, China
  • [ 4 ] [Li, Yuanxiang]College of Mechanical Engineering and Applied Electronics Technology, Beijing University of Technology, Beijing 100124, China

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来源 :

China Welding (English Edition)

ISSN: 1004-5341

年份: 2011

期: 1

卷: 20

页码: 49-53

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