후방산란신호에 의한 Rayleigh파의 속도측정 및 비파괴검사

The measurments of Rayleigh velocity and the non-destructive evaluation by using backscattering signal

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 results has been good agreement with the theoretical value. The method of non-destructive evaluation using backscattering signal has been presented and the internal of IC sample has been displayed acoustic image with good contrast.