公开(公告)号：US11768180B1

公开(公告)日：2023-09-26

申请号：US18176439

申请日：2023-02-28

申请人： Nanjing University of Aeronautics and Astronautics

发明人： Zhenghua Qian ,  Zhi Qian ,  Peng Li ,  Xianwei Wu ,  Chen Yang ,  Yinghong Zhang

IPC分类号： G01N29/06 ,  G06T7/00 ,  G01N29/04 ,  G06T7/40

CPC分类号： G01N29/069 ,  G01N29/041 ,  G06T7/0004 ,  G01N2291/015 ,  G01N2291/0234 ,  G01N2291/106 ,  G06T7/40 ,  G06T2207/30108

摘要： The present disclosure relates to a method for ultrasonic guided wave quantitative imaging in a form of variable array and belongs to the technical field of ultrasonic non-destructive testing. The method includes: converting a non-linear lippmann-Schwinger equation into a form of linear summation by a method of moments; and selecting acquisition arrays with different numbers of probes to measure a scattered field signal, and modifying Green's functions by variable born approximation for continuous iterations to approximate a true solution, so as to obtain a final objective function Ok to be solved. According to the present disclosure, by adjusting the arrays, the number of probes and appropriate solution algorithm can be selected based on the testing accuracy; and the method can achieve quantitative evaluation of non-destructive testing, and can be widely used in practical guided wave testing applications of industrial non-destructive testing.