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Optical Engineering

Phase-correction algorithm of deformed grating images in the depth measurement of weld pool surface in gas tungsten arc welding
Author(s): Yiqing Wei; Nansheng Liu; Xian Hu; Xiaopu Ai
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Paper Abstract

The principle and system structure of the depth measurement of weld pool surface in tungsten insert gas (TIG) welding are first introduced in the paper, then the problem of the common phase lines is studied. We analyze the causes and characteristics of the phase lines, and propose a phase correction method based on line ratio. The paper presents the principle and detail processing steps of this phase correction algorithm, and then the effectiveness and processing characteristics of the algorithm are verified by simulation. Finally, the algorithm is applied to phase processing in the depth measurement of the TIG weld pool surface and obtains satisfying results.

Paper Details

Date Published: 1 May 2011
PDF: 7 pages
Opt. Eng. 50(5) 057209 doi: 10.1117/1.3579519
Published in: Optical Engineering Volume 50, Issue 5
Show Author Affiliations
Yiqing Wei, Nanchang Univ. (China)
Nansheng Liu, Nanchang Univ. (China)
Xian Hu, Nanchang Univ. (China)
Xiaopu Ai, Nanchang Univ. (China)


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