Demonstrates the detection of conductive microbeads using SV-GMR sensors and Helmholtz coils, suggesting advancements in eddy current testing.
This paper presents the utilization of spin-valve giant magnetoresistance (SV-GMR) as a sensor and Helmholtz coil as an exciter for detection of both single and array conductive microbead based on eddy current testing (ECT) technique. The magnetic field distribution of the proposed ECT probe was calculated by finite element method (FEM). The experiment was performed to detect a single and array conductive microbead. The results enabled us to determine the position and achieve good level of signals.
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山田 et al. (2007) studied this question.
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