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한국생산제조학회 학술지 영문 홈페이지
[ Article ]
Journal of the Korean Society of Manufacturing Technology Engineers - Vol. 27, No. 4, pp.363-370
ISSN: 2508-5107 (Online)
Print publication date 15 Aug 2018
Received 05 Jun 2018 Revised 20 Jul 2018 Accepted 28 Jul 2018
DOI: https://doi.org/10.7735/ksmte.2018.27.4.363

수직 GMA 용접부에서 화상처리를 위한 추출 알고리즘에 대한 연구

김창곤a ; 박민호a ; 손준식b ; 윤태종a ; 김일수a, *
Study of Extraction Algorithm for Image Processing in Vertical GMA Welding
Chang-Gon Kima ; Min-Ho Parka ; Joon-Sik Sonb ; Tae-Jong Yuna ; Ill-Soo Kima, *
aDepartment of Machanical Engineering, Mokpo National University, 1666, Yeongsan-ro, Chonggye-myon, Muan-gun, Jeonnam-do, 58579, Korea
bResearch Institute of Medium& Small Shipbuilding, 55, Daebuljugeo 3-ro, Samho-eup, Yeongam-gun, Jeonnam-do, 58457, Korea

Correspondence to: *Tel.: +82-61-454-3455 Fax: +82-61-452-6376 E-mail address: ilsookim@mokpo.ac.kr (Ill-Soo Kim).

Abstract

A welding monitoring system is indispensable for ensuring high-quality weldments in the vertical gas metal arc (GMA) process, and techniques for analyzing the arc characteristics by extracting welding arc lines from the welds are required. In this study, we have developed intelligent and effective algorithms for image processing in GMA welding based on thermal high-speed cameras. The proposed algorithms were verified and compared, to obtain the optimal one for each image-processing step. Finally, the validity of the proposed algorithms was examined using welding arc line images obtained under different welding environments. The results proved that the performance of the proposed algorithm was excellent in eliminating variable noise and extracting the feature points and centerline for vertical GMA welding, and can be employed for general industrial applications.

Keywords:

Vertical GMA welding, Welding arc, Image processing, Binarization, Feature points dectction

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