Severity Estimation of Defects on Interpretation of Eddy-Current Defectograms
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 act...
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| Format: | Article |
| Language: | English |
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Yaroslavl State University
2021-06-01
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| Series: | Моделирование и анализ информационных систем |
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| Online Access: | https://www.mais-journal.ru/jour/article/view/1486 |
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| author | Egor V. Kuzmin Oleg E. Gorbunov Petr O. Plotnikov Vadim A. Tyukin Vladimir A. Bashkin |
| author_facet | Egor V. Kuzmin Oleg E. Gorbunov Petr O. Plotnikov Vadim A. Tyukin Vladimir A. Bashkin |
| author_sort | Egor V. Kuzmin |
| collection | DOAJ |
| description | 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. At the same time, severity estimation of defined defects is also of great interest. This article continues the cycle of works devoted to the problem of automatic recognition of images of defects and rail structural elements 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 article is devoted to the issue of constructing severity estimation of found defects with various lengths. The construction of the severity estimation is based on a concept of the generalized relative amplitude of useful signals. A relative amplitude is a ratio of an actual signal amplitude to a corresponding threshold level of useful signals. The generalized relative amplitude is calculated by using the entropy of the half-normal distribution, which is assumed to be a model for a probability distribution of an appearance of certain relative amplitudes in an evaluated defect. Tuning up the formula for calculating severity estimation of a defect is carried out on the basis of eddy-current records of structural elements. As a reference of the most dangerous defect, the bolted rail joint is considered. It models a fracture of a rail. A reference weak defect is a flash butt weld, a defectogram of which contains signals with low amplitude values. The proposed approach to severity estimation of defects is shown by examples. |
| first_indexed | 2024-04-10T02:24:06Z |
| format | Article |
| id | doaj.art-7337d0152a054c8496a2e8f06a9193a7 |
| institution | Directory Open Access Journal |
| issn | 1818-1015 2313-5417 |
| language | English |
| last_indexed | 2024-04-10T02:24:06Z |
| publishDate | 2021-06-01 |
| publisher | Yaroslavl State University |
| record_format | Article |
| series | Моделирование и анализ информационных систем |
| spelling | doaj.art-7337d0152a054c8496a2e8f06a9193a72023-03-13T08:07:35ZengYaroslavl State UniversityМоделирование и анализ информационных систем1818-10152313-54172021-06-0128217018510.18255/1818-1015-2021-2-170-1851129Severity Estimation of Defects on Interpretation of Eddy-Current DefectogramsEgor V. Kuzmin0Oleg E. Gorbunov1Petr O. Plotnikov2Vadim A. Tyukin3Vladimir A. Bashkin4Ярославский государственный университет им. П. Г. ДемидоваООО “Центр инновационного программирования”, NDDLabООО “Центр инновационного программирования”, NDDLabООО “Центр инновационного программирования”, NDDLabЯрославский государственный университет им. П. Г. ДемидоваTo 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. At the same time, severity estimation of defined defects is also of great interest. This article continues the cycle of works devoted to the problem of automatic recognition of images of defects and rail structural elements 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 article is devoted to the issue of constructing severity estimation of found defects with various lengths. The construction of the severity estimation is based on a concept of the generalized relative amplitude of useful signals. A relative amplitude is a ratio of an actual signal amplitude to a corresponding threshold level of useful signals. The generalized relative amplitude is calculated by using the entropy of the half-normal distribution, which is assumed to be a model for a probability distribution of an appearance of certain relative amplitudes in an evaluated defect. Tuning up the formula for calculating severity estimation of a defect is carried out on the basis of eddy-current records of structural elements. As a reference of the most dangerous defect, the bolted rail joint is considered. It models a fracture of a rail. A reference weak defect is a flash butt weld, a defectogram of which contains signals with low amplitude values. The proposed approach to severity estimation of defects is shown by examples.https://www.mais-journal.ru/jour/article/view/1486неразрушающий контроль рельсоввихретоковая дефектоскопияобнаружение дефектовавтоматический анализ дефектограммоценка опасности дефектов |
| spellingShingle | Egor V. Kuzmin Oleg E. Gorbunov Petr O. Plotnikov Vadim A. Tyukin Vladimir A. Bashkin Severity Estimation of Defects on Interpretation of Eddy-Current Defectograms Моделирование и анализ информационных систем неразрушающий контроль рельсов вихретоковая дефектоскопия обнаружение дефектов автоматический анализ дефектограмм оценка опасности дефектов |
| title | Severity Estimation of Defects on Interpretation of Eddy-Current Defectograms |
| title_full | Severity Estimation of Defects on Interpretation of Eddy-Current Defectograms |
| title_fullStr | Severity Estimation of Defects on Interpretation of Eddy-Current Defectograms |
| title_full_unstemmed | Severity Estimation of Defects on Interpretation of Eddy-Current Defectograms |
| title_short | Severity Estimation of Defects on Interpretation of Eddy-Current Defectograms |
| title_sort | severity estimation of defects on interpretation of eddy current defectograms |
| topic | неразрушающий контроль рельсов вихретоковая дефектоскопия обнаружение дефектов автоматический анализ дефектограмм оценка опасности дефектов |
| url | https://www.mais-journal.ru/jour/article/view/1486 |
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