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Weld Crack Detection Based on Region Electromagnetic Sensing Thermography

Lookup NU author(s): Dr Bin Gao, Professor Gui Yun TianORCiD

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Abstract

IEEE Nondestructive inspection for fatigue cracks is a critical and challenge task in both science and industry fields. This paper investigates the sensing effect of region electromagnetic performance as well as thermal intensity and uniformity on weld crack detection. The uniformity variation caused by vertical and horizontal lift-off distance between sensing and defect has been studied. In particular, a new ΔT metric has been proposed to present the thermal contrast and evaluate the detectability for weld natural cracks. This has been conducted by detail interpreting the region sensing for electromagnetic and thermal fields. Results have shown that the crack can be detected with a higher thermal contrast as it lies in a region sensing with relatively high uniformity and eddy current intensity.

Publication metadata

Author(s): Wu Y, Gao B, Zhao J, Wang Y, Liu Z, Chen J, Yin Y, Tian GY

Publication type: Article

Publication status: Published

Journal: IEEE Sensors Journal

Year: 2018

Online publication date: 10/09/2018

Acceptance date: 02/04/2018

ISSN (print): 1530-437X

ISSN (electronic): 2379-9153

Publisher: IEEE

URL: https://doi.org/10.1109/JSEN.2018.2868867

DOI: 10.1109/JSEN.2018.2868867

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