Performance of magnetic pulsed-eddy-current system using high dynamic and high linearity improved giant magnetoresistance magnetometer
Performance of magnetic pulsed-eddy-current system using high dynamic and high linearity improved giant magnetoresistance magnetometer
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DOI：
10.1109/jsen.2006.883095
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发表时间：
2006-12-01
影响因子：
4.3
通讯作者：
De Jong, Paul A.
中科院分区：
文献类型：
--
作者：
Dolabdjian, Christophe P.;Perez, Laurent;De Jong, Paul A.
涡流无损检测通常使用单频时谐激励进行。脉冲激励为传统的涡流技术提供了一种简单有效的替代方案，并且传统上使用线圈（发射器和/或接收器）来实现。我们提出了一种脉冲涡流系统的替代方案，使用高性能的巨磁阻磁强计。给出了瞬态涡流产生的磁通密度的解析解。与实验结果的比较表明，近似是准确的（1%或更好）。系统性能的介绍和讨论与传感器的特性，并与经典的（发射器/接收器线圈系统）。
Eddy-current nondestructive testing is commonly carried out using single-frequency time-harmonic excitations. Pulsed excitation offers a simple and effective alternative to classical eddy-current techniques and is classically implemented with coil(s) (transmitter and/or receiver). We present a pulsed-eddy-current-system alternative using a high-performance giant magnetoresistance magnetometer is presented. An analytical solution of the magnetic flux density created by the transient eddy current is given. Comparison with experimental results shows that the approximations are accurate (1% or better). System performances are presented and discussed versus sensor characteristics and compared to classical ones (transmitter/receiver coil systems).