永磁扰动检测有限元分析及优化设计

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Abstract Permanent magnetic field perturbation testing(PMFP) is a new method for nonde- structive testing. The method can be applied in detecting surface crack and judging crack size by the static magnetic field variation when the magnet moves along the surface of metal. While the deficiency of designing theories and the weak signal of PMFP severely confine the further expansion of their scope of application. In order to thoroughly solve these problems, the perturbation mechanism should be further analyzed. From magnetic disturbance mechanism, a PMFP sensor structure is proposed that the body coil could detect the inner PMFP and the spiral coil could detect the outer PMFP which between permanent magnet and the defect. With the basic designing principle of the PMFP sensor, the key parameters of PMFP sensor structure are discussed, which significantly influence the detection efficiency. And the transduction efficiency of PMFP could be effectively improved by utilizing orthogonal test method based upon the finite element model of parameterized scanning.

Key words： Inner PMFP outer PMFP finite element analysis optimum design orthogonal test design

Received: 30 August 2014 Published: 13 April 2015

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TM153

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	Articles by authors
	Cai Zhichao
	Liu Suzhen
	Zhang Chuang
	Jin Liang
	Yang Qingxin

Cite this article:

Cai Zhichao,Liu Suzhen,Zhang Chuang等. Finite Element Analysis and Optimum Design of Permanent Magnetic Field Perturbation Testing[J]. Transactions of China Electrotechnical Society, 2015, 30(3): 67-72.

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http://dgjsxb.ces-transaction.com/EN/ OR http://dgjsxb.ces-transaction.com/EN/Y2015/V30/I3/67

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