Journal of the Korean Institute of Telematics and Electronics (대한전자공학회논문지)
- Volume 26 Issue 2
- /
- Pages.163-168
- /
- 1989
- /
- 1016-135X(pISSN)
The Measurements of Rayleigh Velocity and the Non-Destructive Evaluation by Using Backscattering Signal
후방산란신호에 의한 Rayleigh 파의 속도측정 및 비파괴검사
- Ban, Cheon-Sik (Dept. of Elec. Eng., Kyunghee Univ.) ;
- Kim, Jang-Kwon (Dept. of Elec. Eng., Kyunghee Univ.) ;
-
Jun, Kye-Suk
(Dept. of Elec. Eng., Kyunghee Univ.)
- Published : 1989.02.01
Abstract
In this paper, Rayleigh wave velocity has been measured by detecting the backscattered signal generating near the Rayleigh critical angle in the elastic medium. The rotating system has been made for the measurment of Rayleigh angle. It has been shown that the measured velocity for the stainless steel, brass aluminum, copper has been good agreement with the theoretical value. The method of non-destructive evaluation using backscattering signal has been presented and the c-scan acoustic image for internal of IC sample has been displayed.
본 연구에서는 Rayleigh 임계각 근처에서 발생하는 후방산란신호를 검출 함으로써 탄성매질에서 Rayleigh 파의 속도를 측정하였다. Rayleigh 각을 측정하기 위한 회전시스템을 제작하였으며 스테인레스, 황동, 알루미늄, 구리샘플에 대해서 측정된 속도는 이론값과 좋은 일치를 보였다. 후방산란신호에 의한 비파괴검사 방법을 제시하였으며 IC 샘플내부에 대한 c-scan 음향이미지를 나타내었다.
Keywords