公开(公告)号：US20220268739A1

公开(公告)日：2022-08-25

申请号：US17742237

申请日：2022-05-11

Applicant: DALIAN UNIVERSITY OF TECHNOLOGY

Inventor： Zhongbing LUO ,  Li LIN ,  Song ZHANG ,  Hong WANG ,  Shijie JIN ,  Zhiyuan MA

IPC: G01N29/07 ,  G01N29/06

Abstract: A multi-material inspection system and velocity measurement method of critically refracted longitudinal wave based on single-angle wedges belong to the field of nondestructive testing of high-end equipment. The method includes the following steps: designing a transmitting wedge and a receiving wedge with the same inclination angle, and building phased array ultrasonic-based inspection systems of critically refracted longitudinal wave; estimating a longitudinal wave velocity range of a material to be tested, calculating and optimizing a phased array ultrasonic delay law, and building a relation between a longitudinal wave velocity and an amplitude of critically refracted longitudinal wave; reading and interpolating the arrival time of a received signal, and calculating a longitudinal wave velocity of the material to be tested; determining an optimal delay law, and exciting and receiving a critically refracted longitudinal wave.