The most difficult problem to be solved in the None-Destructive-Test is the separation of the correlated acoustic images caused by existing more than two images on the same axis. Though various techniques are proposed but satisfactory results are not ...
The most difficult problem to be solved in the None-Destructive-Test is the separation of the correlated acoustic images caused by existing more than two images on the same axis. Though various techniques are proposed but satisfactory results are not yet come out. In this paper, I proposed the new technique enhancing the resolution of acoustic images by applying the time-delay signal aquisition method. By using the 500 won coin as the experimental sample, 1 detected and separated the backside image which is correlated with the front surface image by applying proposed technique. I used the variable time delayed pulse to distinguish the complex
acoustic signals. The experimental results confirmed the better resolution compare with data thresholding techniques in separating the images.