Title: An ultrasonic signal acquisition method of ferromagnetic materials based on similar matrix blind source separation

Authors: Lin Zhu; Minping Jia; Guangming Guo

Addresses: College of Mechanical Engineering, Yangzhou University, Yangzhou 225127, China ' College of Mechanical Engineering, Southeast University, Nanjing 211189, China ' College of Mechanical Engineering, Yangzhou University, Yangzhou 225127, China

Abstract: In order to overcome the problems of low signal-to-noise ratio, low efficiency and poor signal richness in ultrasonic signal acquisition of ferromagnetic materials, a new ultrasonic signal acquisition method based on similar matrix blind source separation is proposed. The blind source separation is carried out to remove the noise of the ultrasonic signal of ferromagnetic materials. The basic electromagnetic field equation, the alternating electromagnetic field control equation and the basic acoustic field equation are used to achieve high-quality ultrasonic signal acquisition of ferromagnetic materials. The experimental results show that the denoising effect of the proposed method is good, the signal-to-noise ratio can reach 25 dB~30 dB, the acquisition efficiency is higher, and the overall application time can be controlled within 0.2 s.

Keywords: similarity matrix; blind source separation; ferromagnetic materials; signal acquisition.

DOI: 10.1504/IJMPT.2021.117748

International Journal of Materials and Product Technology, 2021 Vol.63 No.3, pp.148 - 167

Received: 06 Apr 2020
Accepted: 02 Jul 2020
Published online: 23 Sep 2021 *

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