Xi'an Jiaotong University

Northeastern University

Xingwu Zhang

Xuefeng Chen

Ming Li

Lin Zhang

Fei Li

Shaohua Tian

Zhibo Yang

Mingfeng Zhu

Engang Wang

Lin Xu

Anyuan Deng

Zhuang Li

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.

Lamb wave phased array focus-imaging method based on frequency response function

Growing community of inventors

Shaanxi, China

Xingwu Zhang