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

被引：14

作者：

Tsukamoto, Akira ^{[1
]}

Hato, Tsunehiro ^{[1
]}

Adachi, Seiji ^{[1
]}

Oshikubo, Yasuo ^{[1
]}

Tsukada, Keiji ^{[2
]}

Tanabe, Keiichi ^{[1
]}

机构：

[1] Superconducting Sensing Technol Assoc, Yokohama, Kanagawa 2230051, Japan

[2] Okayama Univ, Grad Sch Nat Sci & Technol, Okayama 7008530, Japan

来源：

IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY | 2018年 / 28卷 / 04期

基金：

日本科学技术振兴机构;

关键词：

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

D O I：

10.1109/TASC.2018.2795614

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

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.

引用

页数：5