Nondestructive inspection of holes with distinct spacing in plate using the moving mode of induction thermography

Zhang, Xiang; Peng, Jianping; He, Kailang; Gao, Xiaorong

doi:10.1016/j.infrared.2022.104045

Cited by 7 publications

(2 citation statements)

References 23 publications

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“…This provides a non-uniform heat source to the surface of the specimen, causing a lot of noise. For this reason, the LSM has the advantage of significantly improving the detectability by providing a uniform heat source and generating relatively little noise [34,35].…”

Section: Line-scanning Methodsmentioning

confidence: 99%

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Defect Recognition and Morphology Operation in Binary Images Using Line-Scanning-Based Induction Thermography

2022

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Active infrared thermography is an attractive and highly reliable technique used for the non-destructive evaluation of test objects. In this paper, defect detection on the subsurface of the STS304 metal specimen was performed by applying the line-scanning method to induction thermography. In general, the infrared camera and the specimen are fixed in induction thermography, but the line-scanning method can excite a uniform heat source because relative movement occurs. After that, the local heating area due to Joule’s heating effect was removed, and filtering was applied for the 1st de-noising. Threshold-value-based binarization processing using the Otsu algorithm was performed for clear defect object recognition. After performing the 2nd de-noising, automatic defect recognition was performed using a boundary tracking algorithm. As a result, the conditions due to the parameters of the scanning line for the thermal image were determined.

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Section: Line-scanning Methodsmentioning

confidence: 99%

“…Figure 4 shows the front and back sides of the specimen, and Table 2 shows the physical properties of STS304. the advantage of significantly improving the detectability by providing a uniform heat source and generating relatively little noise [34,35].…”

Section: Sts304 Reference Specimenmentioning

confidence: 99%