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

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

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference proceeding contributionpeer-review

3 Citations (Scopus)

Abstract

We present an eddy-current test (ECT) method for detecting conductive microbeads on a non-conductive 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.

Original languageEnglish
Title of host publicationProceedings - Third IEEE International Workshop on Electronic Design, Test and Applications, DELTA 2006
Place of PublicationPiscataway, NJ
PublisherInstitute of Electrical and Electronics Engineers (IEEE)
Pages157-162
Number of pages6
Volume2006
ISBN (Print)0769525008, 9780769525006
DOIs
Publication statusPublished - 2006
Externally publishedYes
EventThird IEEE International Workshop on Electronic Design, Test and Applications, DELTA - 2006 - Kuala Lumpur, Malaysia
Duration: 17 Jan 200619 Jan 2006

Other

OtherThird IEEE International Workshop on Electronic Design, Test and Applications, DELTA - 2006
CountryMalaysia
CityKuala Lumpur
Period17/01/0619/01/06

Keywords

  • Conductive microbead
  • Eddy-current testing
  • Helmholtz coil
  • Spin-valve giant magnetoresistance

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