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Image Processing Algorithm for Real-Time Crack Inspection in Hole Expansion Test

Title
Image Processing Algorithm for Real-Time Crack Inspection in Hole Expansion Test
Author
윤종헌
Keywords
Crack; Imaging processing; Hole expansion ratio (HER); Greyscale value; Binarization; Zinc-coating
Issue Date
2019-06
Publisher
KOREAN SOC PRECISION ENG
Citation
INTERNATIONAL JOURNAL OF PRECISION ENGINEERING AND MANUFACTURING, v. 20, No. 7, Page. 1139-1148
Abstract
This paper mainly focuses on development of the smart crack inspection algorithm facilitating the through-thickness crack during the hole expansion test, which makes it possible to calculate the hole expansion ratio, automatically, with the image processing technique. The proposed crack inspection algorithm consists of six steps such as binarization, blob detection, background deletion, ROI selection, image linearization, and crack identification using the C# language. This algorithm is able to capture the various types of the through-thickness and double cracks irrespective of the reflectance and the initial thickness of the applied sheet materials. In addition, it is possible to keep trace of the in-plane crack and its propagation during the HER test.
URI
https://link.springer.com/article/10.1007%2Fs12541-019-00101-4https://repository.hanyang.ac.kr/handle/20.500.11754/116418
ISSN
2234-7593; 2005-4602
DOI
10.1007/s12541-019-00101-4
Appears in Collections:
COLLEGE OF ENGINEERING SCIENCES[E](공학대학) > MECHANICAL ENGINEERING(기계공학과) > Articles
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