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An Algorithm for Correcting Levels of Useful Signals on Interpretation of Eddy-Current Defectograms

https://doi.org/10.18255/1818-1015-2021-1-74-88

Abstract

To ensure traffic safety of railway transport, non-destructive tests of rails are regularly carried out by using various approaches and methods, including eddy-current flaw detection methods. An automatic analysis of large data sets (defectograms) that come from the corresponding equipment is an actual problem. The analysis means a process of determining the presence of defective sections along with identifying structural elements of railway tracks in defectograms. This article continues the cycle of works devoted to the problem of automatic recognizing images of defects and structural elements of rails in eddy-current defectograms. In the process of forming these images, only useful signals are taken into account, the threshold levels of amplitudes of which are determined automatically from eddy-current data. The previously used algorithm for finding threshold levels was focused on situations in which the vast majority of signals coming from the flaw detector is a rail noise. A signal is considered useful and is subject to further analysis if its amplitude is twice the corresponding noise threshold. The article is devoted to the problem of correcting threshold levels, taking into account the need to identify extensive surface defects of rails. An algorithm is proposed for finding the values of threshold levels of rail noise amplitudes with their subsequent correction in the case of a large number of useful signals from extensive defects. Examples of the algorithm’s operation on real eddy-current data are given.

About the Authors

Egor V. Kuzmin
P. G. Demidov Yaroslavl State University
Russian Federation

Professor, Doctor of Science

14 Sovetskaya str., Yaroslavl 150003



Oleg E. Gorbunov
Center of Innovative Programming, NDDLab
Russian Federation

General Director, PhD

144 Soyuznaya str., Yaroslavl 150008



Petr O. Plotnikov
Center of Innovative Programming, NDDLab
Russian Federation

Production Engineer

144 Soyuznaya str., Yaroslavl 150008



Vadim A. Tyukin
Center of Innovative Programming, NDDLab
Russian Federation

Head of Software Development

144 Soyuznaya str., Yaroslavl 150008



Vladimir A. Bashkin
P. G. Demidov Yaroslavl State University; Center of Innovative Programming, NDDLab
Russian Federation

Professor, Doctor of Science

14 Sovetskaya str., Yaroslavl 150003, 

144 Soyuznaya str., Yaroslavl 150008



References

1. A. A. Markov and E. A. Kuznetsova, Rails flaw detection. Formation and analysis of signals. Book 1. Principles. St. Petersburg: KultInformPress, 2010.

2. A. A. Markov and E. A. Kuznetsova, Rails flaw detection. Formation and analysis of signals. Book 2. Data interpretation. St. Petersburg: Ultra Print, 2014.

3. V. F. Tarabrin, A. V. Zverev, O. E. Gorbunov, and E. V. Kuzmin, “About Data Filtration of the Defectogram Automatic Interpretation by Hardware and Software Complex ASTRA”, NDT World, vol. 64, no. 2, pp. 5–9, 2014.

4. E. V. Kuzmin, O. E. Gorbunov, P. O. Plotnikov, and V. A. Tyukin, “Finding the Level of Useful Signals on Interpretation of Magnetic and Eddy-Current Defectograms”, Automatic Control and Computer Sciences, vol. 52, no. 7, pp. 658–666, 2018.

5. E. V. Kuzmin, O. E. Gorbunov, P. O. Plotnikov, and V. A. Tyukin, “An Efficient Algorithm for Finding the Level of Useful Signals on Interpretation of Magnetic and Eddy Current Defectograms”, Automatic Control and Computer Sciences, vol. 52, no. 7, pp. 867–870, 2018.

6. E. V. Kuzmin, O. E. Gorbunov, P. O. Plotnikov, V. A. Tyukin, and V. A. Bashkin, “Application of Neural Networks for Recognizing Rail Structural Elements in Magnetic and Eddy Current Defectograms”, Automatic Control and Computer Sciences, vol. 53, no. 7, pp. 628–637, 2019.

7. E. V. Kuzmin, O. E. Gorbunov, P. O. Plotnikov, V. A. Tyukin, and V. A. Bashkin, “Application of Convolutional Neural Networks for Recognizing Long Structural Elements of Rails in Eddy-Current Defectograms”, Modeling and analysis of information systems, vol. 27, no. 3, pp. 316–329, 2020.


Review

For citations:


Kuzmin E.V., Gorbunov O.E., Plotnikov P.O., Tyukin V.A., Bashkin V.A. An Algorithm for Correcting Levels of Useful Signals on Interpretation of Eddy-Current Defectograms. Modeling and Analysis of Information Systems. 2021;28(1):74-88. (In Russ.) https://doi.org/10.18255/1818-1015-2021-1-74-88

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ISSN 1818-1015 (Print)
ISSN 2313-5417 (Online)