A novel forced-resonance microwave method to detect surface cracks in metal

IEICE Electronics Express

Ki-Chai Kim²  Jae-Yong Kwon¹  No-Weon Kang¹ 

[1] Center for Electromagnetic Wave, Korea Research Institute of Standards and Science (KRISS);Department of Electrical Engineering, Yeungnam University

关键词: microwave method;    crack detection;    nondestructive testing;    cutoff cavity;    forced resonance;   

DOI  :  10.1587/elex.13.20160715

学科分类：电子、光学、磁材料

来源: Denshi Jouhou Tsuushin Gakkai

【 摘 要 】

References(12)This paper presents a novel forced-resonance microwave technique to detect surface cracks in metal. This technique utilizes a cutoff cavity with a control element and a voltmeter to probe for surface cracks in the metal. Crack signals are detected by using forced resonance from the cutoff cavity probe. In the absence of a crack, the cutoff cavity probe aperture with a shorting plate (short-circuit) can resonate forcefully by adjusting the control element, and the forced resonance characteristics of the cutoff cavity are then probed by a detector (voltmeter) with voltage maximized. However, in the presence of a crack, the forced-resonance cutoff cavity probe aperture, in turn, changes the resonance properties from a short circuit, and the resonance variations are then detected by the detector as the voltage varies. The validity of this method was established by comparing experimental results with theoretical values.

【 授权许可】

Unknown