中国电机工程学报2012，Vol.32Issue(6)：176-182,7.
金属管道外侧脉冲磁场激励的线圈电压解析式
Analytical Expressions of Induced Coil Voltages Generated by Pulsed Eddy Currents for Metal Pipe Testing
摘要
Abstract
This paper solved the eddy current field induced by pulse current in saddle-shaped coil outside the metal pipe with linear conductivity and permeability.By using the second order vector potential,the magnetic field in the air could be described by a single scalar function,and the calculation process could thus be simplified.We presented the boundary value problems of this electromagnetic model and obtained the linear equations for unknown coefficients.Then,we reduced the condition number of the coefficient matrix through substitution of variables and solved the linear equations by using block matrix.Based on the Fourier Transform,we obtained the analytical solution of the coil voltage induced by arbitrary waveform current in the multi-turn saddle-shaped drive coil.The analytical expressions were verified through a comparison of the theoretical curves with the experimental curves of the austenite stainless steel pipes.Results in this paper provide theoretical basis for simulation calculation and experimental study of the pulsed eddy current testing for pipes.关键词
脉冲涡流/二阶矢量位/管道检测/鞍形线圈/电磁场理论Key words
pulsed eddy current/second order vector potential/pipe inspection/saddle-shaped coil/electro-magnetic theory分类
信息技术与安全科学引用本文复制引用
陈兴乐,雷银照..金属管道外侧脉冲磁场激励的线圈电压解析式[J].中国电机工程学报,2012,32(6):176-182,7.基金项目
国家自然科学基金项目(50777002) （50777002）
