VISUALIZATION METHOD OF STRUCTURE DEFECT, VISUALIZATION DEVICE FOR STRUCTURE DEFECT, AND VISUALIZATION DEVICE FOR AIR BUBBLES OR LESION REGION

摘要

PROBLEM TO BE SOLVED: To provide a visualization method of a structure defect and a visualization device for a structure defect by which discriminability between a closed crack and an open crack included in a structure can be improved and a defect such as a closed crack can be detected with high discriminability, and to provide a visualization device for air bubbles or a lesion region in which air bubbles or a lesion region included in a tissue can be detected with high discriminability.;SOLUTION: Transmission/reception means 1: transmits a plurality of kinds of ultrasonic waves with a predetermined fundamental frequency and having amplitudes different from each other to a structure as transmission signals, respectively; receives ultrasonic waves reflected from the structure; and obtains a plurality of kinds of reception signals corresponding to the transmission signals. A signal processor 2: applies band-pass filtering for passing a component having the fundamental frequency, to the reception signals obtained in the transmission/reception means 1; obtains a plurality of kinds of video data corresponding to the reception signals; performs arithmetic operation based on magnitudes of the amplitudes of the corresponding transmission signals; and obtains a video image of a defect.;COPYRIGHT: (C)2014,JPO&INPIT