采用SV-GMR传感器的亥姆霍兹线圈技术检测导电微珠

Third IEEE International Workshop on Electronic Design, Test and Applications (DELTA'06) Pub Date : 2006-01-17 DOI:10.1109/DELTA.2006.25

T. Somsak, K. Chomsuwan, S. Yamada, M. Iwahara, S. C. Mukhopadhyay

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引用次数: 4

摘要

我们提出了一种检测非导电基板上导电微珠的涡流测试(ECT)方法。亥姆霍兹线圈用来产生激励性磁场。通过自旋阀巨磁阻(SV-GMR)传感器检测由铅锡微珠内涡流产生的磁场。实验结果与微珠磁场的解析解进行了比较。本文还介绍了微珠网格检测的早期结果。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Conductive microbead detection by Helmholtz coil technique with SV-GMR sensor

We present an eddy-current test (ECT) method for detecting conductive microbeads on a nonconductive substrate. A Helmholtz coil is used to generate an exciting magnetic field. The magnetic fields, generated by eddy-currents in a Pb-Sn microbead, are detected by a spin-valve giant magnetoresistive (SV-GMR) sensor. The experimental results are compared to an analytical solution for the magnetic field over the microbead. Early results for the detection of a grid of microbeads are also presented.

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Third IEEE International Workshop on Electronic Design, Test and Applications (DELTA'06)

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