Magnetic NDE system for detection of crack in steel deck with high lift-off using secondary differential detection coil

Yuto Goda, Hiroto Shobu, Takumi Kobara, Kenji Sakai, Toshihiko Kiwa, Akira Tsukamoto, Keiichi Tanabe, Keiji Tsukada

Research output: Contribution to conferencePaper

Abstract

Recently, the aging of buildings and infrastructure facilities is becoming a social problem. In the steel structure, the nondestructive evaluation with high lift-off is required to inspect the steel material under the asphalt or concrete, such as the steel floor slabs of roads. Under the high lift-off condition, the influence of the magnetic noise and applied magnetic field should be reduced because the signal from the crack is small. In order to reduce the influence of the magnetic noise, in this study, the detection of crack signal by eddy current testing was examined using a detection coil of a differential coil. This differential coil is a secondary differential coil combining two differential coils aiming for improving the signal to noise ratio (SNR) by reducing the influence of the magnetic noise and applied magnetic field. Using this secondary differential coil, the crack with high liftoff of 80 mm was detected, and it is expected to detect the cracks in steel structures located under the asphalt or concrete.

Original languageEnglish
Publication statusPublished - 2019
Event10th International Workshop NDT in Progress 2019 - Prague, Czech Republic
Duration: Oct 7 2019Oct 9 2019

Conference

Conference10th International Workshop NDT in Progress 2019
CountryCzech Republic
CityPrague
Period10/7/1910/9/19

Keywords

  • Crack
  • High lift-off
  • NDE
  • Secondary differential coil

ASJC Scopus subject areas

  • Modelling and Simulation
  • Mechanics of Materials
  • Mechanical Engineering
  • Industrial and Manufacturing Engineering
  • Computer Science Applications
  • Safety, Risk, Reliability and Quality

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  • Cite this

    Goda, Y., Shobu, H., Kobara, T., Sakai, K., Kiwa, T., Tsukamoto, A., Tanabe, K., & Tsukada, K. (2019). Magnetic NDE system for detection of crack in steel deck with high lift-off using secondary differential detection coil. Paper presented at 10th International Workshop NDT in Progress 2019, Prague, Czech Republic.