A Study of Quantifying Thickness of Ferromagnetic Pipes Based on Remote Field Eddy Current Testing
Remote Field Eddy Current Testing (RFECT) has broad applications in ferromagnetic pipe testing due to the same testing sensitivity to inner and outer wall defects. However, how to quantify wall thickness in the RFECT of pipes is still a big problem. According to researchers’ studies, a lin...
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| Format: | Article |
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MDPI AG
2018-08-01
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| Series: | Sensors |
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| Online Access: | http://www.mdpi.com/1424-8220/18/9/2769 |
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| author | Wei Zhang Yibing Shi Yanjun Li Qingwang Luo |
| author_facet | Wei Zhang Yibing Shi Yanjun Li Qingwang Luo |
| author_sort | Wei Zhang |
| collection | DOAJ |
| description | Remote Field Eddy Current Testing (RFECT) has broad applications in ferromagnetic pipe testing due to the same testing sensitivity to inner and outer wall defects. However, how to quantify wall thickness in the RFECT of pipes is still a big problem. According to researchers’ studies, a linear relationship exists between the wall thickness, permeability and conductivity of a pipe and the phase of the RFECT signal. Aiming to quantify wall thickness by using this linear function, it is necessary to further study the effects of pipe permeability and conductivity on the phase of the RFECT signal. When the product value of the permeability and the conductivity of a pipe remains constant, the univariate analysis and Finite Element Analysis (FEA) are employed to analyze the variations among the phase of the RFECT signal caused by different couples of permeability and conductivity. These variations are calibrated by using a nonlinear fitting method. Moreover, Multi-Frequency Eddy Current Testing (MFECT) is applied to inverse the permeability and conductivity of a pipe to compensate for the quantification analysis of wall thickness. The methods proposed in this paper are validated by analyzing the simulation signals and can improve the practicality of RFECT of ferromagnetic pipes. |
| first_indexed | 2024-04-13T09:16:08Z |
| format | Article |
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| institution | Directory Open Access Journal |
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| language | English |
| last_indexed | 2024-04-13T09:16:08Z |
| publishDate | 2018-08-01 |
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| series | Sensors |
| spelling | doaj.art-ea6ed47f1000401d84a3ce0054a33c982022-12-22T02:52:44ZengMDPI AGSensors1424-82202018-08-01189276910.3390/s18092769s18092769A Study of Quantifying Thickness of Ferromagnetic Pipes Based on Remote Field Eddy Current TestingWei Zhang0Yibing Shi1Yanjun Li2Qingwang Luo3School of Automation Engineering, University of Electronic Science and Technology of China, Chengdu 611731, ChinaSchool of Automation Engineering, University of Electronic Science and Technology of China, Chengdu 611731, ChinaSchool of Automation Engineering, University of Electronic Science and Technology of China, Chengdu 611731, ChinaSchool of Automation Engineering, University of Electronic Science and Technology of China, Chengdu 611731, ChinaRemote Field Eddy Current Testing (RFECT) has broad applications in ferromagnetic pipe testing due to the same testing sensitivity to inner and outer wall defects. However, how to quantify wall thickness in the RFECT of pipes is still a big problem. According to researchers’ studies, a linear relationship exists between the wall thickness, permeability and conductivity of a pipe and the phase of the RFECT signal. Aiming to quantify wall thickness by using this linear function, it is necessary to further study the effects of pipe permeability and conductivity on the phase of the RFECT signal. When the product value of the permeability and the conductivity of a pipe remains constant, the univariate analysis and Finite Element Analysis (FEA) are employed to analyze the variations among the phase of the RFECT signal caused by different couples of permeability and conductivity. These variations are calibrated by using a nonlinear fitting method. Moreover, Multi-Frequency Eddy Current Testing (MFECT) is applied to inverse the permeability and conductivity of a pipe to compensate for the quantification analysis of wall thickness. The methods proposed in this paper are validated by analyzing the simulation signals and can improve the practicality of RFECT of ferromagnetic pipes.http://www.mdpi.com/1424-8220/18/9/2769RFECTferromagnetic pipeFEAwall thicknessquantificationnonlinear fittingMFECT |
| spellingShingle | Wei Zhang Yibing Shi Yanjun Li Qingwang Luo A Study of Quantifying Thickness of Ferromagnetic Pipes Based on Remote Field Eddy Current Testing Sensors RFECT ferromagnetic pipe FEA wall thickness quantification nonlinear fitting MFECT |
| title | A Study of Quantifying Thickness of Ferromagnetic Pipes Based on Remote Field Eddy Current Testing |
| title_full | A Study of Quantifying Thickness of Ferromagnetic Pipes Based on Remote Field Eddy Current Testing |
| title_fullStr | A Study of Quantifying Thickness of Ferromagnetic Pipes Based on Remote Field Eddy Current Testing |
| title_full_unstemmed | A Study of Quantifying Thickness of Ferromagnetic Pipes Based on Remote Field Eddy Current Testing |
| title_short | A Study of Quantifying Thickness of Ferromagnetic Pipes Based on Remote Field Eddy Current Testing |
| title_sort | study of quantifying thickness of ferromagnetic pipes based on remote field eddy current testing |
| topic | RFECT ferromagnetic pipe FEA wall thickness quantification nonlinear fitting MFECT |
| url | http://www.mdpi.com/1424-8220/18/9/2769 |
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