Impedance of a curved circular spiral coil around a conductive cylinder

被引：16

作者：

Burke, S. K. ^{[1
]}

Ditchburn, R. J. ^{[1
]}

Theodoulidis, T. P. ^{[2
]}

机构：

[1] Def Sci & Technol Org, Fishermans Bend, Vic 3207, Australia

[2] Univ Western Macedonia, Dept Mech Engn, Kozani 50100, Greece

来源：

NDT & E INTERNATIONAL | 2014年 / 64卷

关键词：

Coils; Eddy currents; Impedance I; nductance; Theoretical modeling; EDDY-CURRENT PROBE; INSPECTION; ARRAYS;

D O I：

10.1016/j.ndteint.2014.02.002

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Expressions are presented for the inductance of a curved circular spiral coil in free space and the change in impedance when the coil is wrapped around the surface of a magnetic, conductive cylinder. Inductance and impedance measurements of a thin conformable coil on a cylindrical Al-alloy rod were used to test the validity of these expressions. The theoretical predictions are in very good agreement with the experimental measurements over the frequency range 1 kHz-10 MHz. The findings are compared with previous work using rectangular spiral coils and it was found that the change in normalized impedance at high frequencies for a circular coil was almost identical to that obtained for a similarly-sized square coil. The implications for use in eddy-current nondestructive testing are discussed. Crown Copyright (C) 2014 Published by Elsevier Ltd. All rights reserved.

引用

页码：1 / 6

页数：6

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