Use of automatic image processing for monitoring of welding processes and weld inspection : Eckelt, B.; Meyendorf, N.; Morgner, W.; Richter, U. Proceedings of the 12th World Conference on Non-Destructive Testing, Amsterdam (Netherlands) 23–28 Apr. 1989, Vol. 1, pp. 37–41. Edited by J. Boogaard and G.M. van Dijk, Elsevier, 1989

• Publisher: Elsevier Science
• Year: 1996
• Tongue: English
• Weight: 159 KB
• Volume: 29
• Category: Article
• ISSN: 0963-8695
• DOI: 10.1016/0963-8695(96)84927-9

✦ Synopsis

experimental results are demonstrated for the submerged arc welding process. In this process the welding pool is covered by a thick layer of welding flux and is therefore optically invisible. By using computer data on the grey levels of the weld images and their histogram distributions, the three-dimensional shape of the submerged arc pool can be recognized, image-digitized and analysed in real time at the rate of 30 frames per second. The depth of the welding pool which characterizes the weld penetration is a very important characteristic of the weld quality. This characteristic can he measured in real time and used for weld tracking and welding current control.