Phase-correction algorithm of deformed grating images in the depth measurement of weld pool surface in gas tungsten arc welding

Yiqing Wei; Nansheng Liu; Xian Hu; Xiaopu Ai

doi:10.1117/1.3579519

1 May 2011 Phase-correction algorithm of deformed grating images in the depth measurement of weld pool surface in gas tungsten arc welding

Yiqing Wei, Nansheng Liu, Xian Hu, Xiaopu Ai

Author Affiliations +

Optical Engineering, Vol. 50, Issue 5, 057209 (May 2011). https://doi.org/10.1117/1.3579519

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.

©(2011) Society of Photo-Optical Instrumentation Engineers (SPIE)

Citation Download Citation

Yiqing Wei, Nansheng Liu, Xian Hu, and Xiaopu Ai "Phase-correction algorithm of deformed grating images in the depth measurement of weld pool surface in gas tungsten arc welding," Optical Engineering 50(5), 057209 (1 May 2011). https://doi.org/10.1117/1.3579519

Published: 1 May 2011

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