A novel eddy current testing probe suitable to the inspection of thick structures

Ladislav Janousek, Zhenmao Chen, Noritaka Yusa, Kenzo Miya

研究成果: Conference contribution

抄録

This study develops a novel eddy current testing probe that can considerably reduce a drawback caused by the skin effect, on the basis of the new excitation system proposed by the authors. The key idea of the new excitation system is the suppression of eddy current density on the surface of a specimen using superpositioned phase-shifted excitation fields. The probe consists of four coaxial rectangular exciters; the phase and the density of exciting currents in the exciters are adjusted so that density of induced eddy currents on the surface is suppressed, whereas that at the depths of the specimen remains as unchanged as possible. Experimental verifications and numerical simulations are performed to evaluate the efficiency of the new probe. The results show that the new probe indeed realizes deep penetration of induced eddy currents, and provides 20% difference between signals due to 15 mm deep near-side notch and those due to 20 mm deep one although an exciting frequency of 10 kHz is applied.

本文言語English
ホスト出版物のタイトルNDT in Progress
ホスト出版物のサブタイトル3rd International Workshop of NDT Experts, Proceedings
出版社Brno University of Technology
ISBN(印刷版)8021429968, 9788021429963
出版ステータスPublished - 2005 1 1
外部発表はい
イベントNDT in Progress: 3rd International Workshop of NDT Experts 2005 - Prague, Czech Republic
継続期間: 2005 10 102005 10 12

出版物シリーズ

名前NDT in Progress: 3rd International Workshop of NDT Experts, Proceedings

Other

OtherNDT in Progress: 3rd International Workshop of NDT Experts 2005
国/地域Czech Republic
CityPrague
Period05/10/1005/10/12

ASJC Scopus subject areas

  • 機械工学
  • 材料力学
  • 材料科学(全般)

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