Acousto-ultrasonic sensing using capsular fibre Bragg gratings for temperature compensation

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This contribution demonstrates that a one-end free capsular fibre Bragg grating, well documented as a strain-free temperature sensor head to discriminate temperature effect from a fibre Bragg grating strain sensor, successfully functions as an acousto-ultrasonic sensor. It implies that both built-in strain and temperature compensation sensors can be utilized for acousto-ultrasonic damage detection. The wave sensing principle of the capsular fibre Bragg grating is explained on the basis of the existence of a fibre-guided wave. Furthermore, it is reported that the capsular fibre Bragg grating is a resonant acousto-ultrasonic sensor through frequency analysis of the sensor responses. Finally, we present a method capable of controlling the resonance frequency of the capsular fibre Bragg grating.
Publisher
IOP PUBLISHING LTD
Issue Date
2006-11
Language
English
Article Type
Article
Keywords

SENSOR

Citation

MEASUREMENT SCIENCE & TECHNOLOGY, v.17, no.11, pp.2920 - 2926

ISSN
0957-0233
DOI
10.1088/0957-0233/17/11/009
URI
http://hdl.handle.net/10203/202874
Appears in Collection
AE-Journal Papers(저널논문)
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