Thickness measurement of metallic plates with finite planar dimension using eddy current method

Ruochen Huang; Mingyang Lu; Anthony Peyton; Wuliang Yin

doi:10.1109/TIM.2020.2987413

Thickness measurement of metallic plates with finite planar dimension using eddy current method

Ruochen Huang, Mingyang Lu, Anthony Peyton, Wuliang Yin

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Abstract

Until now, the Dodd-Deeds model has been used to evaluate the inductance change in an air-cored sensor in the presence of an infinitely large conducting plate. In practice, it can be applied to the sample relatively larger than the radius of the sensor coil (normally >3-5 times larger), which can be regarded as a plate sample with infinite planar size. However, in various practical applications, the size of the tested sample may not satisfy this condition. In this article, a modified analytical solution based on the Dodd-Deeds model is proposed, which has introduced a new initial integration point instead of 0 for the analytical inductance of the finite-size metallic plate. Theoretical derivation has been presented for the derivation of the initial integration point. Moreover, an inversely proportional relation can be observed between the initial integration point and the radius of the test sample. The simulation and experimental measurements for the thickness of several finite-size metallic samples have been carried out for the verification of the proposed method.

Original language	English
Article number	9064543
Pages (from-to)	8424-8431
Journal	IEEE Transactions on Instrumentation and Measurement
Volume	69
Issue number	10
DOIs	https://doi.org/10.1109/TIM.2020.2987413
Publication status	Published - 13 Apr 2020

Keywords

eddy current testing
finite region
magnetic induction
thickness measurment
non-destructive testing

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10.1109/TIM.2020.2987413

1. Final manuscriptAccepted author manuscript, 2.21 MB

Electromagnetic Sensing Group
Peyton, A. (PI), Fletcher, A. (Researcher), Daniels, D. (CoI), Conniffe, D. (PGR student), Podd, F. (PI), Davidson, J. (Researcher), Anderson, J. (Support team), Wilson, J. (Researcher), Marsh, L. (PI), O'Toole, M. (PI), Watson, S. (PGR student), Yin, W. (PI), Regan, A. (PGR student), Williams, K. (Researcher), Rana, S. (Researcher), Khalil, K. (PGR student), Hills, D. (PGR student), Whyte, C. (PGR student), Wang, C. (PGR student), Hodgskin-Brown, R. (PGR student), Dadkhahtehrani, F. (PGR student), Forster, S. (PGR student), Zhu, F. (PGR student), Yu, K. (PGR student), Xiong, L. (PGR student), Lu, T. (PGR student), Zhang, L. (PGR student), Lyu, R. (PGR student), Zhu, R. (PGR student), She, S. (PGR student), Meng, T. (PGR student), Pang, X. (PGR student), Zheng, X. (PGR student), Bai, X. (PGR student), Zou, X. (PGR student), Ding, Y. (PGR student), Shao, Y. (PGR student), Xia, Z. (PGR student), Zhang, Z. (PGR student), Khangerey, R. (PGR student) & Lawless, B. (Researcher)
1/10/04 → …
Project: Research

Cite this

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title = "Thickness measurement of metallic plates with finite planar dimension using eddy current method",

abstract = "Until now, the Dodd-Deeds model has been used to evaluate the inductance change in an air-cored sensor in the presence of an infinitely large conducting plate. In practice, it can be applied to the sample relatively larger than the radius of the sensor coil (normally >3-5 times larger), which can be regarded as a plate sample with infinite planar size. However, in various practical applications, the size of the tested sample may not satisfy this condition. In this article, a modified analytical solution based on the Dodd-Deeds model is proposed, which has introduced a new initial integration point instead of 0 for the analytical inductance of the finite-size metallic plate. Theoretical derivation has been presented for the derivation of the initial integration point. Moreover, an inversely proportional relation can be observed between the initial integration point and the radius of the test sample. The simulation and experimental measurements for the thickness of several finite-size metallic samples have been carried out for the verification of the proposed method.",

keywords = "eddy current testing, finite region, magnetic induction, thickness measurment, non-destructive testing",

author = "Ruochen Huang and Mingyang Lu and Anthony Peyton and Wuliang Yin",

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T1 - Thickness measurement of metallic plates with finite planar dimension using eddy current method

AU - Huang, Ruochen

AU - Lu, Mingyang

AU - Peyton, Anthony

AU - Yin, Wuliang

PY - 2020/4/13

Y1 - 2020/4/13

N2 - Until now, the Dodd-Deeds model has been used to evaluate the inductance change in an air-cored sensor in the presence of an infinitely large conducting plate. In practice, it can be applied to the sample relatively larger than the radius of the sensor coil (normally >3-5 times larger), which can be regarded as a plate sample with infinite planar size. However, in various practical applications, the size of the tested sample may not satisfy this condition. In this article, a modified analytical solution based on the Dodd-Deeds model is proposed, which has introduced a new initial integration point instead of 0 for the analytical inductance of the finite-size metallic plate. Theoretical derivation has been presented for the derivation of the initial integration point. Moreover, an inversely proportional relation can be observed between the initial integration point and the radius of the test sample. The simulation and experimental measurements for the thickness of several finite-size metallic samples have been carried out for the verification of the proposed method.

AB - Until now, the Dodd-Deeds model has been used to evaluate the inductance change in an air-cored sensor in the presence of an infinitely large conducting plate. In practice, it can be applied to the sample relatively larger than the radius of the sensor coil (normally >3-5 times larger), which can be regarded as a plate sample with infinite planar size. However, in various practical applications, the size of the tested sample may not satisfy this condition. In this article, a modified analytical solution based on the Dodd-Deeds model is proposed, which has introduced a new initial integration point instead of 0 for the analytical inductance of the finite-size metallic plate. Theoretical derivation has been presented for the derivation of the initial integration point. Moreover, an inversely proportional relation can be observed between the initial integration point and the radius of the test sample. The simulation and experimental measurements for the thickness of several finite-size metallic samples have been carried out for the verification of the proposed method.

KW - eddy current testing

KW - finite region

KW - magnetic induction

KW - thickness measurment

KW - non-destructive testing

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JF - IEEE Transactions on Instrumentation and Measurement

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ER -

Thickness measurement of metallic plates with finite planar dimension using eddy current method

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