Technical Diagnostics and Non-Destructive Testing, 2025, №01

2025 №01 (03)

DOI of Article 10.37434/tdnk2025.01.04

2025 №01 (05)

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"Tekhnichna Diahnostyka ta Neruinivnyi Kontrol" (Technical Diagnostics and Non-Destructive Testing) #1, 2025, pp. 22-26

Electromagnetic-acoustic converter with combined magnetization

H.M. Suchkov, S.Yu. Pliesnetsov, M.Ye. Kalnitskyi, Yu.Yu. Koshkarov, I.M. Oleksenko

National Technical University «Kharkiv Polytechnic Institute». 2 Kyrpichova Str., 61002, Kharkiv, Ukraine. E-mail: suchkov@gmail.com

The use in industry of methods and means of excitation of transverse waves ultrasonic pulses using electromagnetic-acoustic converters is becoming increasingly widespread. However, converters based on permanent powerful magnets have disadvantages, which consist in their strong attraction to ferromagnetic products and in the adhesion of ferromagnetic particles, which leads to distortion of the results of non-destructive testing and a decrease in sensitivity. Over time, such magnets gradually lose their magnetic properties. Known converters with pulse magnetization can only operate with low probing frequencies due to heating. It is proposed to use permanent magnets with a relatively low magnetic field induction and additional pulse magnetization simultaneously. Such a technical solution increases the sensitivity of the inspection and significantly reduces the attraction of the converter to the ferromagnetic product, and also makes it possible to significantly increase the frequency of probing the control object. 16 Ref., 5 Fig.
Keywords: ferromagnetic product, non-destructive testing, ultrasonic pulses, electromagnetic-acoustic converter, magnetic field, pulsed magnetization

Received: 29.01.2025
Received in revised form: 13.02.2025
Accepted: 25.03.2025

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