公开(公告)号：US20220205952A1

公开(公告)日：2022-06-30

申请号：US17514868

申请日：2021-10-29

申请人： XI'AN JIAOTONG UNIVERSITY

发明人： Zhibo YANG ,  Mingfeng ZHU ,  Xuefeng CHEN ,  Shaohua TIAN ,  Ming LI ,  Xingwu ZHANG

IPC分类号： G01N29/06 ,  G06T7/00 ,  G01N29/04 ,  G01N29/24 ,  G01N29/46

摘要： The disclosure discloses a Lamb wave phased array focus-imaging method based on a frequency response function. In the method, a piezoelectric sensor array is arranged on a surface of a tested structure, the frequency response function of an excitation and acquisition pair formed by an excitation array element and an acquisition array element is calculated according to a full-band response signal, and a dispersion pre-compensation signal is constructed; the dispersion pre-compensation signal and the frequency response function are multiplied in a frequency domain to obtain a frequency domain pre-compensation response signal; and according to a distance from the acquisition array element to a focal point at the coordinates, the dispersion of the frequency domain pre-compensation response signal is post-compensated, so as to obtain a frequency domain dispersion post-compensation signal until all sensor excitation and acquisition pairs are traversed.