Eddy current testing probe with dual half-cylindrical coils

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We have developed a new eddy current probe composed of a dual half-cylindrical (2HC) coil as an exciting coil and a sensing coil that is placed in the small gap of the 2HC coil. The 2HC coil induces a linear eddy current on the narrow region within the target medium. The magnitude of eddy current has a maximum peak with the narrow width, underneath the center of the exciting 2HC coil. Because of the linear eddy current, the probe can be used to detect not only the existence of a crack but also its direction in conducting materials. Using specimen with a machined crack, and varying the exciting frequency from 0.5 to 100 kHz, we investigated the relationships between the direction of crack and the output voltage of the sensing coil. (C) 2000 American Institute of Physics. [S0034-6748(00)01402-7].
Publisher
AMER INST PHYSICS
Issue Date
2000-02
Language
English
Article Type
Article; Proceedings Paper
Citation

REVIEW OF SCIENTIFIC INSTRUMENTS, v.71, no.2, pp.567 - 570

ISSN
0034-6748
URI
http://hdl.handle.net/10203/18181
Appears in Collection
PH-Journal Papers(저널논문)
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