Eddy Current Probe for Nondestructive Testing Using Cross-Coupled Figure-Eight Coils

I. Sasada, N. Watanabe

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)

Abstract

It is shown that the pickup head consisting of cross-coupled figure-eight coils originally developed for the magnetostrictive torque sensor is well suited for the eddy current probe detecting small defects in a nonmagnetic conductive material. The probe is easily extended to a one dimensional array form, which substantially reduces number of times of scanning the targeted materials. The response of a single unit of the probe to a trough hole defect in an aluminum plate are presented. A halfway hole at the back of an aluminum plate of 1.2 mm in thickness was successfully detected from the front using this probe. A five-channel array was developed in which the excitation coil is shared by all the channel. A small through hole defect in an aluminum plate was detected clearly by a single scan with the array probe.

Original languageEnglish
Pages (from-to)3149-3151
Number of pages3
JournalIEEE Transactions on Magnetics
Volume31
Issue number6
DOIs
Publication statusPublished - Nov 1995

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering

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