Journal of the Korean Institute of Telematics and Electronics (대한전자공학회논문지)
- Volume 25 Issue 5
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- Pages.580-585
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- 1988
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- 1016-135X(pISSN)
A Study on the construction of Low-Frequency Acoustic Microscope and Its Application
저주파대 음향 현미경의 구성과 그 응용에 관한 연구
- Ko, Dae-Sik (Dept. of Elec. Eng., Kyunghee Univ.) ;
- Moon, Geon (Dept. of Elec. Eng., Kyunghee Univ.) ;
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Jun, Kye-Suk
(Dept. of Elec. Eng., Kyunghee Univ.)
;
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Whang, Keum-Chan
(Dept. of Elec. Eng., Yonsei Univ.)
- Published : 1988.05.01
Abstract
In this paper, a low frequency acoustic microscope system has been built for the purpose of detecting subsurface defects in materials. The lateral resolution of acoustic microscope is studied and analyzed in order to evaluate that system performance. And a NDE technique is demonstrated by using this system. In the focused and defocused mode of operation, the acoustic microscope system showed in experiment that its lateral resolution was about 0.5 mm at a frequency of operation of 3MHz on a fused-quartz sample with seeded circular cracks ranged in size from 0.2 mm to 1.0 mm in diameter wihtin 1 mm of the surface. It also showed the acoustic image of 100 won coin with fine contrast.
Keywords