Author:
Huo Zhilin,Cai Daomeng,Liu Donghang,Duan Yiyang,Meng Hao,Liu Siqv,Liu Xiang
Abstract
Abstract
EMATs have the advantages of non-contact, no coupling, flexible structure, and convenient use. It is widely used in the field of ultrasonic non-destructive testing. At present, research on EMATs mainly focuses on permanent magnet EMATs, but permanent magnet EMATs have defects such as inconvenient movement and lack of high-temperature resistance. Therefore, it is necessary to study electromagnet EMATs. This article focuses on an electromagnetic acoustic transducer (EMAT) for detecting ferromagnetic materials. By analyzing the two mechanisms of Lorentz force and magnetostriction, the aim is to develop an electromagnet EMAT that excites transverse waves. Based on the finite element simulation software COMSOL Multiphysics, simulation analysis is conducted on the E-shaped yoke and cylindrical yoke, spiral coil, and butterfly coil, exploring the impact of different yoke structures and excitation coils on EMAT detection. Finally, by constructing an experimental system, it has been proven that the transducer can excite transverse waves in the direction of steel plate thickness, making it easy for signal analysis.
Subject
Computer Science Applications,History,Education
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