Development of Eddy Current Testing System Using HTS-SQUID on a Hand Cart for Detection of Fatigue Cracks of Steel Plate Used in Expressways

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

doi:10.1109/TASC.2018.2795614

Development of Eddy Current Testing System Using HTS-SQUID on a Hand Cart for Detection of Fatigue Cracks of Steel Plate Used in Expressways

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

Research output: Contribution to journal › Article › peer-review

11 Citations (Scopus)

Abstract

We have been developing an HTS-SQUID eddy current testing system using an HTS-SQUID module and external pickup coil made of Bi-2223 tape to investigate the feasibility of nondestructive evaluation of a steel plate paved with asphalt. In this paper, a new excitation coil intended as a current dipole source is designed and evaluated. The current dipole coil can be expected to generate a unidirectional excitation field and exhibit small field decay by distance and, thus, seems suitable for a measurement under a long liftoff condition such as the case for crack detection through an asphalt pavement. It is also found that a strong single peak appears just above a slit hole as a simulated crack by applying the excitation field using a tilted current dipole coil. The developed measurement system was mounted on a hand cart, and successful detection of a 50-mm-long slit hole and its stable operation were demonstrated in a field operation test.

Original language	English
Article number	1601505
Journal	IEEE Transactions on Applied Superconductivity
Volume	28
Issue number	4
DOIs	https://doi.org/10.1109/TASC.2018.2795614
Publication status	Published - Jun 2018

Keywords

HTS-SQUID
current dipole
eddy current testing
excitation coil
fatigue crack
steel plate

ASJC Scopus subject areas

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

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10.1109/TASC.2018.2795614

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Development of Eddy Current Testing System Using HTS-SQUID on a Hand Cart for Detection of Fatigue Cracks of Steel Plate Used in Expressways. / Tsukamoto, Akira; Hato, Tsunehiro; Adachi, Seiji; Oshikubo, Yasuo; Tsukada, Keiji; Tanabe, Keiichi.

In: IEEE Transactions on Applied Superconductivity, Vol. 28, No. 4, 1601505, 06.2018.

Research output: Contribution to journal › Article › peer-review

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title = "Development of Eddy Current Testing System Using HTS-SQUID on a Hand Cart for Detection of Fatigue Cracks of Steel Plate Used in Expressways",

abstract = "We have been developing an HTS-SQUID eddy current testing system using an HTS-SQUID module and external pickup coil made of Bi-2223 tape to investigate the feasibility of nondestructive evaluation of a steel plate paved with asphalt. In this paper, a new excitation coil intended as a current dipole source is designed and evaluated. The current dipole coil can be expected to generate a unidirectional excitation field and exhibit small field decay by distance and, thus, seems suitable for a measurement under a long liftoff condition such as the case for crack detection through an asphalt pavement. It is also found that a strong single peak appears just above a slit hole as a simulated crack by applying the excitation field using a tilted current dipole coil. The developed measurement system was mounted on a hand cart, and successful detection of a 50-mm-long slit hole and its stable operation were demonstrated in a field operation test.",

keywords = "HTS-SQUID, current dipole, eddy current testing, excitation coil, fatigue crack, steel plate",

author = "Akira Tsukamoto and Tsunehiro Hato and Seiji Adachi and Yasuo Oshikubo and Keiji Tsukada and Keiichi Tanabe",

note = "Funding Information: Manuscript received September 15, 2017; accepted January 11, 2018. Date of publication January 23, 2018; date of current version May 1, 2018. This work was supported by the “Cross-Ministerial Strategic Innovation Promotion Program” funded by the Japan Science and Technology Agency. (Corresponding author: Akira Tsukamoto.) A. Tsukamoto, T. Hato, S. Adachi, Y. Oshikubo, and K. Tanabe are with the Superconducting Sensing Technology Association, Yokohama 223-0051, Japan (e-mail: tsukamot@sustera.or.jp). Publisher Copyright: {\textcopyright} 2002-2011 IEEE.",

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AB - We have been developing an HTS-SQUID eddy current testing system using an HTS-SQUID module and external pickup coil made of Bi-2223 tape to investigate the feasibility of nondestructive evaluation of a steel plate paved with asphalt. In this paper, a new excitation coil intended as a current dipole source is designed and evaluated. The current dipole coil can be expected to generate a unidirectional excitation field and exhibit small field decay by distance and, thus, seems suitable for a measurement under a long liftoff condition such as the case for crack detection through an asphalt pavement. It is also found that a strong single peak appears just above a slit hole as a simulated crack by applying the excitation field using a tilted current dipole coil. The developed measurement system was mounted on a hand cart, and successful detection of a 50-mm-long slit hole and its stable operation were demonstrated in a field operation test.

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Development of Eddy Current Testing System Using HTS-SQUID on a Hand Cart for Detection of Fatigue Cracks of Steel Plate Used in Expressways

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Keywords

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