公开(公告)号：US20240053302A1

公开(公告)日：2024-02-15

申请号：US17776909

申请日：2022-04-04

Applicant: KOREA RESEARCH INSTITUTE OF STANDARDS AND SCIENCE

Inventor： Jong Moon HA ,  Won Jae CHOI ,  Hong Min SEUNG

IPC: G01N29/44 ,  G01N29/024 ,  G06N3/0455 ,  G06N3/08

CPC classification number: G01N29/4472 ,  G01N29/024 ,  G06N3/0455 ,  G06N3/08 ,  G01N2291/101 ,  G01N2291/011 ,  G01N2291/023 ,  G01N2291/0289

Abstract: An ultrasonic NDT method and system, which can extract and analyze a defect signal even when a signal reflected from a defect interferes with a unique initial pulse of an ultrasonic transducer or a signal reflected from the surface of a test object, and an autoencoder-based prediction model training method used therefor. The method may include acquiring a measured signal by transmitting an ultrasonic wave to a test object and receiving an ultrasonic wave reflected from the test object; inputting the measured signal to an autoencoder-based prediction model and predicting a reference signal which is to be expected to be measured from a test object with no defect; calculating a residual signal as the absolute value of a difference between the measured signal and the reference signal; and analyzing information on a defect contained in the test object by analyzing the residual signal.