Eddy current testing utilizing cooled normal pickup coil and superconducting quantum interference device picovoltmeter: Comparison between experiment and analysis

Kenichiro Yao, Tong Qing Yang, Daisuke Yamasaki, Kazuya Tazoh, Keiji Enpuku

研究成果: Contribution to journalArticle査読

6 被引用数 (Scopus)

抄録

Eddy current testing utilizing a cooled normal pickup coil and a high-Tc superconducting quantum interference device (SQUID) picovoltmeter was performed both experimentally and analytically. In the experiment, we successfully detected a small crack on the back surface of a Cu plate by moving the coil in an unshielded environment. First, we developed a method of avoiding the drift of the detected signal that was caused by the variance of lift-off. Next, we clarified the dependences of the detected signal on the excitation frequency and the thickness of the Cu plate. It was shown that an optimum frequency that maximizes the detected signal exists. Because this frequency changed with the thickness of the Cu plate, the frequency dependence could be used to estimate the depth of the crack from the surface of the Cu plate. The experimental results were analyzed taking into account the phase and amplitude of the signal field caused by the crack. Good agreement was obtained between experiment and analysis.

本文言語英語
ページ(範囲)4994-4999
ページ数6
ジャーナルJapanese Journal of Applied Physics, Part 1: Regular Papers and Short Notes and Review Papers
45
6 A
DOI
出版ステータス出版済み - 6 29 2006

All Science Journal Classification (ASJC) codes

  • 工学(全般)
  • 物理学および天文学(全般)

フィンガープリント

「Eddy current testing utilizing cooled normal pickup coil and superconducting quantum interference device picovoltmeter: Comparison between experiment and analysis」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

引用スタイル