Technical Diagnostics and Non-Destructive Testing, 2022, №01



2022 №01 (04)

DOI of Article 10.37434/tdnk2022.01.05

2022 №01 (01)

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Technical Diagnostics and Non-Destructive Testing #1, 2022, pp. 45-53

Application of phase characteristics of the signal in automated eddy current flaw detection

M.O. Redka1, Yu.V. Kutz¹, E.V. Shapovalov², V.M. Uchanin³, Yu.Yu. Lysenko¹, O.D. Bliznyuk⁴

¹National Technical University of Ukraine «Igor Sikorsky Kyiv Polytechnic Institute». 37 Peremohy Ave., 03056, Kyiv, Ukraine. E-mail: y.kuts@ukr.net
²E.O. Paton Electric Welding Institute of NASU. 11 Kazymyr Malevych str., 03150, Kyiv, Ukraine. E-mail: inpat59@ukr.net
³G.V. Karpenko Physico-Mechanical Institute of NASU. 5 Naukova str., 79060, Lviv. E-mail: vuchanin@gmail.com
⁴Research Laboratory of Technical Diagnostics and Nondestructive Testing of Aeronautical Engineering of NAU. 1 Guzar Lyubomyr Ave., 03058, Kyiv, Ukraine. E-mail: nau_409@ukr.net

The paper describes model and experimental studies of phase methods for detection of signals at eddy current flaw detection, observed against a noise background. Testing two methods for signal detection was considered and performed. The first is based on determination of the number of zeroes of the analyzed signal in the sliding mode, and has a low computational resource intensity and simple circuit design. The second method is based on analysis of the resultant vector length (r-statistics) derived from phase characteristic of analyzed signal at its multi-window sliding processing, which features a high reliability of the detected signal. The effectiveness of these methods was checked in the system of automated eddy current flaw detection. Ref. 18, Tabl. 2, Fig. 9.
Keywords: eddy current flaw detection, automated eddy current testing, signal detection, phase method

Received: 17.01.2022

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