<abstract xmlns="http://www.w3.org/1999/xhtml"><p>The magnetic flux leakage (MFL) technique is extensively used for detection of flaws as well as for evaluation of their dimensions in ferromagnetic materials. However, proper analysis of the MFL signal is hindered by the MFL sensor velocity causing distortions of this signal. Traditionally measured components of the MFL signal are particularly sensitive to the scanning velocity. In this paper, an another signal – the gradient of the normal component of magnetic flux density – was proposed as it is less sensitive to the scanning velocity. Results obtained for scans of the steel plate with artificially manufactured flaws confirm this statement.</p></abstract>

The magnetic flux leakage (MFL) technique is extensively used for detection of flaws as well as for evaluation of their dimensions in ferromagnetic materials. However, proper analysis of the MFL signal is hindered by the MFL sensor velocity causing distortions of this signal. Traditionally measured components of the MFL signal are particularly sensitive to the scanning velocity. In this paper, an another signal – the gradient of the normal component of magnetic flux density – was proposed as it is less sensitive to the scanning velocity. Results obtained for scans of the steel plate with artificially manufactured flaws confirm this statement.

Magnetic field gradient as the most useful signal for detection of flaws using MFL technique

Faculty of Applied Physics and Mathematics

Journal of Electrical Engineering

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

The magnetic flux leakage (MFL) technique is extensively used for detection of flaws as well as for evaluation of their dimensions in ferromagnetic materials....

Magnetic field gradient as the most useful signal for detection of flaws using MFL technique

Published Online: Dec 31, 2018

Page range: 422 - 425

Received: Feb 13, 2018

DOI: https://doi.org/10.2478/jee-2018-0065

Keywords
gradient of magnetic field, magnetic flux leakage, velocity-induced eddy currents

© 2018 Zbigniew Usarek et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

Magnetic field gradient as the most useful signal for detection of flaws using MFL technique

Published Online: Dec 31, 2018

Page range: 422 - 425

Received: Feb 13, 2018

DOI: https://doi.org/10.2478/jee-2018-0065

Keywordsgradient of magnetic field, magnetic flux leakage, velocity-induced eddy currents

© 2018 Zbigniew Usarek et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

Keywords
gradient of magnetic field, magnetic flux leakage, velocity-induced eddy currents