Tsinghua University

Huazhong University of Science and Technology

Hubei University of Technology

China Special Equipment Inspection and Research Institute

Eddysun (xiamen) Electronic Co., Ltd.

Junming Lin

Yu Zhang

Wei Zhao

Songling Huang

Shen Wang

Gongtian Shen

Xiaochun Song

Yihua Kang

Disclosed are a method and device for compressing and reconstructing data. The method includes: disposing a transmitting EMAT array and a receiving EMAT array; exciting a Lamb wave, receiving the Lamb wave, subjecting the Lamb wave to narrowband filtering with the narrowband frequency, to form detecting data x(n); analysing the detecting data with a DFT; reconstructing original detecting data and calculating a reconstruction error according to the measurement vector and the recovery matrix by using a TLBO algorithm; optimizing measurement vector and recovery matrix; transmitting the measurement vector to a supervisory device.

Method for compressing and reconstructing data

A method for detecting a defect of a metal plate includes selecting N controllable emitting electromagnetic acoustic transducers EMATs as excitation transducers, and selecting M omnidirectionally receiving EMATs as receiving transducers, exciting an ultrasonic guided wave in a metal plate by a ncontrollable emitting EMAT with a predetermined emission angle; determining whether each of M1 omnidirectionally receiving EMATs and the ncontrollable emitting EMAT form a scattering group; for the scattering group, solving a position of a scattering point and a direction of a scattering side according to a distance between Tand R, the emission angle and a travel time of the ultrasonic guided wave; performing a curve fitting on all the scattering points in directions of respective scattering sides to obtain a contour image of the defect.

Method for detecting defect of metal plate

Growing community of inventors

Xiamen, China

Junming Lin