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A Study of Applying Pulsed Remote Field Eddy Current in Ferromagnetic Pipes Testing
Pulsed Remote Field Eddy Current Testing (PRFECT) attracts the attention in the testing of ferromagnetic pipes because of its continuous spectrum. This paper simulated the practical PRFECT of pipes by using ANSYS software and employed Least Squares Support Vector Regression (LSSVR) to extract the ze...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2017
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5469643/ https://www.ncbi.nlm.nih.gov/pubmed/28475141 http://dx.doi.org/10.3390/s17051038 |
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author | Luo, Qingwang Shi, Yibing Wang, Zhigang Zhang, Wei Li, Yanjun |
author_facet | Luo, Qingwang Shi, Yibing Wang, Zhigang Zhang, Wei Li, Yanjun |
author_sort | Luo, Qingwang |
collection | PubMed |
description | Pulsed Remote Field Eddy Current Testing (PRFECT) attracts the attention in the testing of ferromagnetic pipes because of its continuous spectrum. This paper simulated the practical PRFECT of pipes by using ANSYS software and employed Least Squares Support Vector Regression (LSSVR) to extract the zero-crossing time to analyze the pipe thickness. As a result, a secondary peak is found in zero-crossing time when transmitter passed by a defect. The secondary peak will lead to wrong quantification and the localization of defects, especially when defects are found only at the transmitter location. Aiming to eliminate the secondary peaks, double sensing coils are set in the transition zone and Wiener deconvolution filter is applied. In the proposed method, position dependent response of the differential signals from the double sensing coils is calibrated by employing zero-mean normalization. The methods proposed in this paper are validated by analyzing the simulation signals and can improve the practicality of PRFECT of ferromagnetic pipes. |
format | Online Article Text |
id | pubmed-5469643 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2017 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-54696432017-06-16 A Study of Applying Pulsed Remote Field Eddy Current in Ferromagnetic Pipes Testing Luo, Qingwang Shi, Yibing Wang, Zhigang Zhang, Wei Li, Yanjun Sensors (Basel) Letter Pulsed Remote Field Eddy Current Testing (PRFECT) attracts the attention in the testing of ferromagnetic pipes because of its continuous spectrum. This paper simulated the practical PRFECT of pipes by using ANSYS software and employed Least Squares Support Vector Regression (LSSVR) to extract the zero-crossing time to analyze the pipe thickness. As a result, a secondary peak is found in zero-crossing time when transmitter passed by a defect. The secondary peak will lead to wrong quantification and the localization of defects, especially when defects are found only at the transmitter location. Aiming to eliminate the secondary peaks, double sensing coils are set in the transition zone and Wiener deconvolution filter is applied. In the proposed method, position dependent response of the differential signals from the double sensing coils is calibrated by employing zero-mean normalization. The methods proposed in this paper are validated by analyzing the simulation signals and can improve the practicality of PRFECT of ferromagnetic pipes. MDPI 2017-05-05 /pmc/articles/PMC5469643/ /pubmed/28475141 http://dx.doi.org/10.3390/s17051038 Text en © 2017 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) ). |
spellingShingle | Letter Luo, Qingwang Shi, Yibing Wang, Zhigang Zhang, Wei Li, Yanjun A Study of Applying Pulsed Remote Field Eddy Current in Ferromagnetic Pipes Testing |
title | A Study of Applying Pulsed Remote Field Eddy Current in Ferromagnetic Pipes Testing |
title_full | A Study of Applying Pulsed Remote Field Eddy Current in Ferromagnetic Pipes Testing |
title_fullStr | A Study of Applying Pulsed Remote Field Eddy Current in Ferromagnetic Pipes Testing |
title_full_unstemmed | A Study of Applying Pulsed Remote Field Eddy Current in Ferromagnetic Pipes Testing |
title_short | A Study of Applying Pulsed Remote Field Eddy Current in Ferromagnetic Pipes Testing |
title_sort | study of applying pulsed remote field eddy current in ferromagnetic pipes testing |
topic | Letter |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5469643/ https://www.ncbi.nlm.nih.gov/pubmed/28475141 http://dx.doi.org/10.3390/s17051038 |
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