Asymmetric Abel inversion in imaging spectroscopy for tilted TIG arc plasma. (3rd July 2022)

• Record Type: Journal Article
• Authors: Yamashita, Yuto; Shigeta, Masaya; Komen, Hisaya; Tanaka, Manabu
• Is Part Of: Welding international. Volume 36:Number 7(2022)
• Page Start: 425
• Page End: 433
• Publication Date: 2022-07-03
• Subjects: Tilted TIG arc plasma -- imaging spectroscopy -- asymmetric Abel inversion -- elliptical cross section -- Fowler-Milne method; Welding -- Periodicals; Welding -- Automation -- Periodicals; 671.52
• DOI: 10.1080/09507116.2022.2084822
• Languages: English
• ISSNs: 0950-7116

Abstract

Abstract: An asymmetric Abel inversion processing system was developed to establish a method for diagnosing arc plasma that has an elliptical cross section and is a non-axisymmetric in the direction perpendicular to the observation direction during an arc welding process. This method was applied to an arc plasma in a tilted tungsten inert gas (TIG) welding process. As a result, when this method was applied to the non-axisymmetric intensity distribution due to integration, it was confirmed that the relative error near the central axis and the edge was large regardless of the difference in the cross-sectional shape. In addition, after applying this method to the tilted TIG arc plasma, it was shown that an error of about 350 K occurred in the temperature distribution when emission intensity distribution was converted to the temperature distribution by the Fowler-Milne method. Furthermore, the temperature distribution of the arc plasma obtained in this study was slightly wider than the previous study, while the high-temperature area where the temperature was higher than 14, 000 K showed a good agreement with the previous study. Therefore, it was concluded that, by applying this method to the tilted TIG arc plasma, the equivalent result to the three-dimensional emission spectroscopy could be obtained by photographing a tilted arc plasma from two directions.