Comparison of Machine Learning Methods in Electrical Tomography for Detecting Moisture in Building Walls

Tomasz Rymarczyk, Grzegorz Kłosowski, Anna Hoła, Jan Sikora, Tomasz Wołowiec, Paweł Tchórzewski and Stanisław Skowron
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Tomasz Rymarczyk: Institute of Computer Science and Innovative Technologies, University of Economics and Innovation in Lublin, 20-209 Lublin, Poland
Grzegorz Kłosowski: Faculty of Management, Lublin University of Technology, 20-618 Lublin, Poland
Anna Hoła: Faculty of Civil Engineering, Wrocław University of Science and Technology, 50-370 Wrocław, Poland
Jan Sikora: Institute of Computer Science and Innovative Technologies, University of Economics and Innovation in Lublin, 20-209 Lublin, Poland
Tomasz Wołowiec: Institute of Computer Science and Innovative Technologies, University of Economics and Innovation in Lublin, 20-209 Lublin, Poland
Paweł Tchórzewski: Research & Development Centre Netrix S.A., 20-704 Lublin, Poland
Stanisław Skowron: Faculty of Management, Lublin University of Technology, 20-618 Lublin, Poland

Energies, 2021, vol. 14, issue 10, 1-22

Abstract: This paper presents the results of research on the use of machine learning algorithms and electrical tomography in detecting humidity inside the walls of old buildings and structures. The object of research was a historical building in Wrocław, Poland, built in the first decade of the 19th century. Using the prototype of an electric tomograph of our own design, a number of voltage measurements were made on selected parts of the building. Many algorithmic methods have been preliminarily analyzed. Ultimately, the three models based on machine learning were selected: linear regression with SVM (support vector machine) learner, linear regression with least squares learner, and a multilayer perceptron neural network. The classical Gauss–Newton model was also used in the comparison. Both the experiments based on real measurements and simulation data showed a higher efficiency of machine learning methods than the Gauss–Newton method. The tomographic methods surpassed the point methods in measuring the dampness in the walls because they show a spatial image of the interior and not separate points of the examined cross-section. Research has shown that the selection of a machine learning model has a large impact on the quality of the results. Machine learning has a greater potential to create correct tomographic reconstructions than traditional mathematical methods. In this research, linear regression models performed slightly worse than neural networks.

Keywords: machine learning; electrical tomography; moisture inspection; dampness analysis; nondestructive evaluation; neural networks; SVM; linear regression (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2021
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (8)

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