An innovative contactless method for detecting defects in electrical conductors by measuring a change in electromagnetic torque

被引：12
作者：
Tan, Yanqing [1 ]
Wang, Xiaodong [1 ]
Moreau, Rene [2 ]
机构：
[1] Univ Chinese Acad Sci, Coll Mat Sci & Optoelect Technol, Beijing 101408, Peoples R China
[2] Grenoble INP, Lab SIMAP EPM, F-38402 St Martin Dheres, France
来源：
MEASUREMENT SCIENCE AND TECHNOLOGY | 2015年 / 26卷 / 03期
关键词：
non-destructive testing; non-contact; electromagnetic torque; insulating defects; permanent magnet;
D O I：
10.1088/0957-0233/26/3/035602
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
This paper presents a new non-destructive testing (NDT) method for the detection of defects in electrical conductors. The method distinguishes defect-embedded and defect-free conductors via the variation of angular velocity and electromagnetic torque on a single cylindrical permanent magnet. To demonstrate the feasibility of this method, numerical and experimental investigations have been performed. Quantitative relations between the electromagnetic torque, angular velocity and defect sizes have been obtained and can be considered as calibration functions for this new technique. This study demonstrates that this approach might offer an effective method of detecting the presence of defects in electrical conductors.
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页数：8
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