HTS-SQUID NDE Technique for Pipes based on Ultrasonic Guided Wave

29th International Symposium on Superconductivity

Hatsukade, Y.^1 ; Masutani, N.^1 ; Teranishi, S.^1 ; Masamoto, K.^1 ; Kanenaga, S.^1 ; Adachi, S.^2 ; Tanabe, K.^2

Kindai University, 1 Umenobe, Takaya, Higashi-Hiroshima, Hiroshima

739-2116, Japan^1

SUSTERA, 2-11-19 Minowa-cho, MinatoKita-ku, Yokohama, Kanagawa

223-0051, Japan^2

关键词: High temperature superconductor (HTS);    Magnetic signals;    Magnetostrictive effect;    Measured signals;    Measurement parameters;    Metallic pipes;    Non-destructive evaluation techniques;    Ultrasonic guided wave;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/871/1/012072/pdf
DOI  :  10.1088/1742-6596/871/1/012072

来源: IOP

【 摘 要 】

This article describes research on the novel high-temperature superconductor (HTS) superconducting quantum interference device (SQUID) non-destructive evaluation (NDE) technique for metallic pipes based on ultrasonic guided waves. We constructed HTS-SQUID NDE system for pipes based on ultrasonic guided waves, which were generated and received by means of the magnetostrictive effects. Using the system, we measured magnetic signals due to T (0, 1) mode ultrasonic guided waves that transmitted on aluminium pipe, and investigated influences of measurement parameters to the magnetic signals, such as direction of a HTS-SQUID gradiometer, lift-off distance, and intensity and frequency of input current fed to a magnetostrictive transmitter. With the gradiometer oriented parallel to the pipe axis, more than 10 times larger signals were measured compared with that oriented perpendicular to the pipe axis. Magnetic signals measured by the gradiometer were inverse proportional to the power of the list- off distance, and proportional to the intensity of the input current up to 1 App. Relation between the frequency of the input current and the measured signal was shown and discussed.