<abstract xmlns="http://www.w3.org/1999/xhtml">

<p>The paper proposes a method of simultaneous reconstruction of the electrical conductivity and magnetic permeability profiles of planar metal research objects based on the results of single measurements by eddy current probes using surrogate optimization techniques in a reduced compact subspace design and accumulating the full amount of the most important a priori information about the modes of electromagnetic objects. In addition to the information on the response of probe signals to changes in electrophysical parameters, a priori information includes the data on multifrequency sensing and changes in the lift-off between metal research objects and eddy current probes. All the main stages for the implementation of the method of solving the inverse problem are demonstrated, namely, creating a uniform computer quasi-design of the experiment with improved 2D-projections based on LP<sub>τ</sub>-Sobol’s sequences; creating surrogate models on fully connected deep neural networks; reducing the dimensionality of the full design space using the principal components method of PCA; reconstructing profiles as a result of surrogate optimisation in a compact subspace. Numerical examples of the method are also presented in the paper.</p>
</abstract>

The paper proposes a method of simultaneous reconstruction of the electrical conductivity and magnetic permeability profiles of planar metal research objects based on the results of single measurements by eddy current probes using surrogate optimization techniques in a reduced compact subspace design and accumulating the full amount of the most important a priori information about the modes of electromagnetic objects. In addition to the information on the response of probe signals to changes in electrophysical parameters, a priori information includes the data on multifrequency sensing and changes in the lift-off between metal research objects and eddy current probes. All the main stages for the implementation of the method of solving the inverse problem are demonstrated, namely, creating a uniform computer quasi-design of the experiment with improved 2D-projections based on LPτ-Sobol’s sequences; creating surrogate models on fully connected deep neural networks; reducing the dimensionality of the full design space using the principal components method of PCA; reconstructing profiles as a result of surrogate optimisation in a compact subspace. Numerical examples of the method are also presented in the paper.

Reconstruction of Electrophysical Parameter Distribution During Eddy Current Measurements of Structural Features of Planar Metal Objects

Instrumentation, Mechatronics and Computer Technologies Department

Latvian Journal of Physics and Technical Sciences

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

The paper proposes a method of simultaneous reconstruction of the electrical conductivity and magnetic permeability profiles of planar metal research objects...

Reconstruction of Electrophysical Parameter Distribution During Eddy Current Measurements of Structural Features of Planar Metal Objects

Published Online: May 30, 2024

Page range: 61 - 75

DOI: https://doi.org/10.2478/lpts-2024-0021

Keywords
compact design subspace, eddy current measurements, planar metal research object, profiles of electrophysical parameters, surrogate optimisation

© 2024 V. Ya. Halchenko et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Reconstruction of Electrophysical Parameter Distribution During Eddy Current Measurements of Structural Features of Planar Metal Objects

Published Online: May 30, 2024

Page range: 61 - 75

DOI: https://doi.org/10.2478/lpts-2024-0021

Keywordscompact design subspace, eddy current measurements, planar metal research object, profiles of electrophysical parameters, surrogate optimisation

© 2024 V. Ya. Halchenko et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Keywords
compact design subspace, eddy current measurements, planar metal research object, profiles of electrophysical parameters, surrogate optimisation