Crack detection for the graphite slab using the high-Tc SQUID in unshielded environment

Jen Tzong Jeng, Herng Er Horng, Hong Chang Yang

    研究成果: 雜誌貢獻期刊論文同行評審

    3 引文 斯高帕斯(Scopus)


    The nondestructive evaluation (NDE) for the crack inside a graphite slab was investigated by using the high-T(c) SQUID NDE system in unshielded environment. The crack-depth dependence of the crack signal was explored with the excitation frequency varied from 2 to 20 kHz. It was found that the phase of the crack signal is a linear function of the crack depth for various excitation frequencies. In addition, forlinear phase depth relation scaled in an empirical equation with the skin depth as the only variable. The empirical equation was useful in determining the proper excitation frequency for the eddy-current NDE of conductive samples.

    頁(從 - 到)174-177
    期刊Physica C: Superconductivity and its applications
    發行號PART 1
    出版狀態已發佈 - 2002 八月 1

    ASJC Scopus subject areas

    • Electronic, Optical and Magnetic Materials
    • Condensed Matter Physics
    • Energy Engineering and Power Technology
    • Electrical and Electronic Engineering

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