Version 1
: Received: 10 July 2020 / Approved: 11 July 2020 / Online: 11 July 2020 (17:41:01 CEST)
Version 2
: Received: 18 July 2020 / Approved: 20 July 2020 / Online: 20 July 2020 (04:16:25 CEST)
How to cite:
Huang, R.; Lu, M.; Zhang, Z.; Zhao, Q.; Xie, Y.; Tao, Y.; Meng, T.; Peyton, A.; Theodoulidis, T.; Yin, W. Measurement of the Radius of Metallic Plates Based on a Novel Finite Region Eigenfunction Expansion (FREE) Method. Preprints2020, 2020070245. https://doi.org/10.20944/preprints202007.0245.v2
Huang, R.; Lu, M.; Zhang, Z.; Zhao, Q.; Xie, Y.; Tao, Y.; Meng, T.; Peyton, A.; Theodoulidis, T.; Yin, W. Measurement of the Radius of Metallic Plates Based on a Novel Finite Region Eigenfunction Expansion (FREE) Method. Preprints 2020, 2020070245. https://doi.org/10.20944/preprints202007.0245.v2
Huang, R.; Lu, M.; Zhang, Z.; Zhao, Q.; Xie, Y.; Tao, Y.; Meng, T.; Peyton, A.; Theodoulidis, T.; Yin, W. Measurement of the Radius of Metallic Plates Based on a Novel Finite Region Eigenfunction Expansion (FREE) Method. Preprints2020, 2020070245. https://doi.org/10.20944/preprints202007.0245.v2
APA Style
Huang, R., Lu, M., Zhang, Z., Zhao, Q., Xie, Y., Tao, Y., Meng, T., Peyton, A., Theodoulidis, T., & Yin, W. (2020). Measurement of the Radius of Metallic Plates Based on a Novel Finite Region Eigenfunction Expansion (FREE) Method. Preprints. https://doi.org/10.20944/preprints202007.0245.v2
Chicago/Turabian Style
Huang, R., Theodoros Theodoulidis and Wuliang Yin. 2020 "Measurement of the Radius of Metallic Plates Based on a Novel Finite Region Eigenfunction Expansion (FREE) Method" Preprints. https://doi.org/10.20944/preprints202007.0245.v2
Abstract
Eddy current based approaches have been investigated for a wide range of inspection applications. Dodd-Deeds model and the truncated region eigenfunction expansion (TREE) method are widely applied in various occasions, mostly for the cases that the sample is relatively larger than the radius of the sensor coil. The TREE method converts the integral expressions to the summation of many terms in the truncated region. In a recent work, the impedance of the co-axial air-cored sensor due to a plate of finite radius was calculated by the modified Dodd-Deeds analytical approach proposed by authors. In this paper, combining the modified analytical solution and the TREE method, a new finite region eigenfunction expansion (FREE) method is proposed. This method involves modifying its initial summation point from the first zero of the Bessel function to a value related to the radius of the plate, therefore makes it suitable for plate with finite dimensions. Experiments and simulations have been carried out and compared for the verification of the proposed method. Further, the planar size measurements of the metallic circular plate can be achieved by utilising the measured peak frequency feature.
Keywords
Non-destructive testing; finite region eigenfunction expansion (FREE) method; finite dimension; magnetic induction; size measurements
Subject
Engineering, Electrical and Electronic Engineering
Copyright:
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Commenter: Mingyang Lu
Commenter's Conflict of Interests: Author