|
|
General series expression of eddy-current impedance for coil placed above multi-layer plate conductor |
Yin-Zhao Lei(雷银照) |
School of Automation Science and Electrical Engineering, Beihang University, Beijing 100191, China |
|
|
Abstract This paper presents a closed expression of the layered-plate factor used to calculate the coil eddy-current impedance over the multi-layer plate conductor. By using this expression, the general series of eddy-current impedance can be written directly without solving the undetermined constant equations. The series expression is easy to use for theoretical analysis and programming. Experimental results show that calculated values and measured values are in agreement. As an application, when the bottom layer of the layered plate is a non-ferromagnetic thin layer conductor and the product of the thickness and conductivity of the layer remains unchanged, using the layered-plate factor expression proposed in this paper, it can be theoretically predicted that the eddy-current impedance curves corresponding to different thin layer thickness values will coincide.
|
Received: 04 February 2018
Revised: 16 April 2018
Accepted manuscript online:
|
PACS:
|
03.50.De
|
(Classical electromagnetism, Maxwell equations)
|
|
41.20.-q
|
(Applied classical electromagnetism)
|
|
81.70.Ex
|
(Nondestructive testing: electromagnetic testing, eddy-current testing)
|
|
Fund: Project supported by the National Natural Science Foundation of China (Grant No.51577004). |
Corresponding Authors:
Yin-Zhao Lei
E-mail: leiyinzhao@buaa.edu.cn
|
Cite this article:
Yin-Zhao Lei(雷银照) General series expression of eddy-current impedance for coil placed above multi-layer plate conductor 2018 Chin. Phys. B 27 060308
|
[1] |
Dodd C V and Deeds W E 1968 J. Appl. Phys. 39 2829
|
[2] |
Luquire J W, Deeds W E and Dodd C V 1970 J. Appl. Phys. 41 3983
|
[3] |
Cheng C C, Dodd C V and Deeds W E 1971 Int. J. Nondestruct. Test. 3 109
|
[4] |
Theodoulidis T and Kriezis E 2005 J. Mater. Process. Tech. 161 343
|
[5] |
Lu Y, Bowler J R and Theodoulidis T 2012 J. Appl. Phys. 111 103907
|
[6] |
Theodoulidis T and Kriezis E 2006 Eddy Current Canonical Problems (Forsyth:Tech Science Press) pp. 93-135
|
[7] |
Zhang Q and Wu X J 2017 Acta Phys. Sin. 66 038102 (in Chinese)
|
[8] |
Fan M B, Huang P J, Ye B, Hou D B, Zhang G X and Zhou Z K 2009 Acta Phys. Sin. 58 5950 (in Chinese)
|
[9] |
Zhdanov M S 2009 Geophysical Electromagnetic Theory and Methods (Amsterdam:Elsevier) pp. 194-196
|
[10] |
He J S 2010 Wide FieldElectromagnetic Methodsand Pseudo-Random Signal Electrical Methods (Beijing:Higher Education Press) pp. 61-63 (in Chinese)
|
[11] |
Lei Y Z 2000 Analytical Methods for Time-harmonic Electromagnetic Fields (Beijing:Science Press) p. 181 (in Chinese)
|
[12] |
He C L, Lu Z L and Liu S Y 1995 Modern Measurement and Test 1 23 (in Chinese)
|
[13] |
Abramowitz M and Stegun I A 1972 Handbook of Mathematical Functions (New York:Dover Publications, Inc.) pp. 83-89
|
[14] |
Moulder J C, Uzal E and Rose J H 1992 Rev. Sci. Instrum. 63 3455
|
[15] |
Ananth S and Rose J H 1995 J. Nondestr. Eval. 14 39
|
[16] |
Li Y, Chen Z M, Mao Y and Qi Y 2012 NDT & E Int. 50 29
|
[17] |
Ren F F and Lei Y Z 2013 Nondestruct. Test. 35 50
|
[18] |
Chen X L and Lei Y Z 2015 NDT & E Int. 75 33
|
[19] |
Fu J J and Lei Y Z 2016 Chin. J. Sci. Instrum. 37 617
|
[20] |
Chen X L and Lei Y Z 2015 Chin. Phys. B 24 030301
|
No Suggested Reading articles found! |
|
|
Viewed |
|
|
|
Full text
|
|
|
|
|
Abstract
|
|
|
|
|
Cited |
|
|
|
|
Altmetric
|
blogs
Facebook pages
Wikipedia page
Google+ users
|
Online attention
Altmetric calculates a score based on the online attention an article receives. Each coloured thread in the circle represents a different type of online attention. The number in the centre is the Altmetric score. Social media and mainstream news media are the main sources that calculate the score. Reference managers such as Mendeley are also tracked but do not contribute to the score. Older articles often score higher because they have had more time to get noticed. To account for this, Altmetric has included the context data for other articles of a similar age.
View more on Altmetrics
|
|
|