All-Round Inspection of a Pipe Based on Ultrasonic Guided Wave Testing Utilizing Magnetostrictive Method and HTS-SQUID Gradiometer

被引:3
作者
Hatsukade, Yoshimi [1 ]
Masutani, Natsuki [1 ]
Azuma, Yuki [1 ]
Sato, Kazuya [1 ]
Yoshida, Taro [1 ]
Adachi, Seiji [2 ]
Tanabe, Keiichi [2 ]
机构
[1] Kindai Univ, Fac Engn, Hiroshima 7392116, Japan
[2] SUSTERA, Yokohama, Kanagawa 2230051, Japan
关键词
All-round inspection; pipe; ultrasonic guided wave; magnetostriction; HTS-SQUID gradiometer;
D O I
10.1109/TASC.2019.2904492
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 developed an ultrasonic guided wave testing system for pipes utilizing magnetostrictive method and high-temperature superconductor (HTS) superconducting quantum interference device (SQUID) gradiometer. Two pre-magnetized nickel thin plates were adhered on an aluminium pipe. One of them with a field coil was used as a magnetostriction-based T (0, 1) mode guided wave transmitter, while the other was used as a receiver. All-round inspections of the pipe without and with a circumference slit were conducted by measuring the T(0, 1) mode guide waves around circumference of the pipe using the HTS-SQUID-based guided wave testing system. The optimum experimental setup about excitation frequency and input current to the transmitter was investigated using ez-SQUID electronics. By applying a sine burst current of 0.2 A at 50 kHz with single cycle to the transmitter and rotating the pipe stepwise at 30 degrees, "B-scan" images of the guided wave propagating on the pipe without and with slit were measured. An axisymmetric distribution of a reflected wave from the slit was well detected. We analyzed distribution of incident waves and reflected waves from the end of the pipe based on magnetization in the nickel plates using an electromagnetic simulator and proposed a new transducer.
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页数:5
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