Nondestructive testing of pitting corrosion cracks in rivet of multilayer structures
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- 作者：Minhhuy Le ; Jungmin Kim ; Sejin Kim…
- 关键词：Hall sensor array ; Rivet ; Pitting corrosion crack ; Short ; time fourier transform ; Ultrasonic testing ; Nondestructive testing
- 刊名：International Journal of Precision Engineering and Manufacturing
- 出版年：2016
- 出版时间：November 2016
- 年：2016
- 卷：17
- 期：11
- 页码：1433-1442
- 全文大小：2,349 KB
- 刊物类别：Engineering
- 刊物主题：Industrial and Production Engineering
Materials Science - 出版者：Korean Society for Precision Engineering, in co-publication with Springer Verlag GmbH
- ISSN：2005-4602
- 卷排序：17
文摘
This research proposes an ultrasonic testing method for inspecting pitting corrosion cracks in a rivet of multilayer structures. The system is a combination of a magnetic sensor array and an ultrasonic sensor. The magnetic sensor array is used to automatically measure the presence of a rivet and its center position. Then, the ultrasonic sensor is guided to the rivet center in order to inspect pitting corrosion cracks in the rivet. The magnetic sensor uses a 64-Hall sensor elements array with a 0.52-mm interval that can measure the rivet center position at a standard deviation of 0.27 mm and 0.42 mm in the scan and sensor directions, respectively. The ultrasonic signal is analyzed in the frequency domain using the short-time Fourier transform that helps better observe the presence of cracks compared with the conventional signal analysis in A-scan present.