AERIAL ULTRASONIC FLAW DETECTION DEVICE AND AERIAL ULTRASONIC FLAW DETECTION SYSTEM

摘要

PROBLEM TO BE SOLVED: To provide an aerial ultrasonic flaw detection system having high accuracy of ultrasonic flaw detection when an outer wall of a structure is set as a test object.;SOLUTION: An aerial ultrasonic flaw detection system converts a rectangular wave burst signal made up of a prescribed number of consecutive negative rectangular waves into an ultrasonic wave with a vibrator, and applies the ultrasonic wave to a transmission ultrasonic probe arranged facing a test object via air at an incident angle by ultrasonic V transmission method. A reception ultrasonic probe arranged facing the test object, i.e. an outer wall of a structure, via air converts an ultrasonic wave that has propagated through the test object into a signal at the incident angle by the ultrasonic V transmission method. The aerial ultrasonic detection system determines whether there is a flaw in the test object on the basis of the signal level of the signal.;SELECTED DRAWING: Figure 1;COPYRIGHT: (C)2017,JPO&INPIT