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

Jen Tzong Jeng; Herng Er Horng; Hong Chang Yang

doi:10.1016/S0921-4534(02)00647-0

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

Jen Tzong Jeng, Herng Er Horng^*, Hong Chang Yang

^*此作品的通信作者

光電工程學士學位學程

研究成果: 雜誌貢獻 › 期刊論文 › 同行評審

4 引文斯高帕斯（Scopus）

摘要

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.

原文	英語
頁（從 - 到）	174-177
頁數	4
期刊	Physica C: Superconductivity and its applications
卷	372-376
發行號	PART 1
DOIs	https://doi.org/10.1016/S0921-4534(02)00647-0
出版狀態	已發佈 - 2002 8月

ASJC Scopus subject areas

電子、光磁材料
凝聚態物理學
能源工程與電力技術
電氣與電子工程

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10.1016/S0921-4534(02)00647-0

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引用此

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title = "Crack detection for the graphite slab using the high-Tc SQUID in unshielded environment",

abstract = "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.",

keywords = "Graphite, Nondestructive evaluation, SQUID, Skin depth",

author = "Jeng, {Jen Tzong} and Horng, {Herng Er} and Yang, {Hong Chang}",

note = "Funding Information: This work is supported by the National Science Council of the ROC under grant nos.: NSC89-2112-M-003-040 and NSC89-2112-M-002-071.",

year = "2002",

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doi = "10.1016/S0921-4534(02)00647-0",

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AU - Jeng, Jen Tzong

AU - Horng, Herng Er

AU - Yang, Hong Chang

N1 - Funding Information: This work is supported by the National Science Council of the ROC under grant nos.: NSC89-2112-M-003-040 and NSC89-2112-M-002-071.

PY - 2002/8

Y1 - 2002/8

N2 - 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.

AB - 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.

KW - Graphite

KW - Nondestructive evaluation

KW - SQUID

KW - Skin depth

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

摘要

ASJC Scopus subject areas

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指紋

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