Development of Three-Channel HTS-SQUID Inspection System for Orthotropic Steel Decks of Expressway Bridges

Akira Tsukamoto, Tsunehiro Hato, Seiji Adachi, Yasuo Oshikubo, Keiji Tsukada, Keiichi Tanabe

Research output: Contribution to journalArticle

Abstract

We have developed a three-channel high-temperature superconductor (HTS) superconducting quantum interference device (SQUID) eddy current testing (ECT) system for detection of a fatigue crack which occurs in a steel deck plate used in expressway bridges. To avoid physical interference between adjacent channels, a dipole coil with compact design is employed. A field test using the three channel ECT system was performed on an expressway bridge having an orthotropic steel deck structure under traffic lane restrictions. Although a signal corresponding to existence of a fatigue crack was not detected due to a low occurrence rate of fatigue crack, we could demonstrate a stable and long-time operation in an urban area during the daytime and acquisition of correct data corresponding to some structural features of the expressway bridge.

Original languageEnglish
Article number8665920
JournalIEEE Transactions on Applied Superconductivity
Volume29
Issue number5
DOIs
Publication statusPublished - Aug 1 2019
Externally publishedYes

Keywords

  • current dipole
  • eddy current testing
  • fatigue crack
  • HTS-SQUID
  • steel plate

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

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