ULTRASONIC WALL-THICKNESS MEASURING INSTRUMENT AND ULTRASONIC WALL-THICKNESS MEASURING METHOD

摘要

PROBLEM TO BE SOLVED: To prevent lowering of evaluation accuracy, with respect to a micro-change in wall thickness in the measurement of wall thickness, using ultrasonic inspection technique.;SOLUTION: The ultrasonic wall-thickness measuring instrument is constituted so that wall thickness variation or the like is determined in a received ultrasonic wave by using the optimum wave number signal of a repeatedly received ultrasonic wave to exaggerate wall thickness difference display on a display screen and the determination or the like of the micro-variation in wall thickness is made easy by the exaggerated display and the wall-thickness distribution display in the specimen as a whole. As a result, a measuring result can be easily determined, even by a person other than a skilled inspector, a determined mistake can be prevented and the reliability of evaluation data is also enhanced.;COPYRIGHT: (C)2006,JPO&NCIPI