Swept-frequency eddy current testing to characterize a nonmagnetic metallic plate and a nonconductive coating over it

研究成果: Article査読

2 被引用数 (Scopus)

抄録

In the measurement of a metallic plate's dimension by eddy current testing, the plate's electrical conductivity is required but practically unavailable. This study investigated the application of swept-frequency eddy current testing (SFECT) to measure the thicknesses of the plate and a nonconductive coating over it, even without knowing the plate's conductivity. Hinted by the known analytical expressions available for the calculation of the impedance of an air-cored coil above a plate, we found that the maximum phase angle of the normalized SFECT signal is relevant to the thickness of a conductive plate and the liftoff, regardless of the conductivity, and can be applied to thickness measurement. Analytical and experimental studies also showed that the conductivity of a nonmagnetic plate can be measured nondestructively by using SFECT signals in the high frequency range.

本文言語English
ページ(範囲)1169-1178
ページ数10
ジャーナルInternational Journal of Applied Electromagnetics and Mechanics
59
3
DOI
出版ステータスPublished - 2019
外部発表はい

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 凝縮系物理学
  • 材料力学
  • 機械工学
  • 電子工学および電気工学

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