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http://dx.doi.org/10.5000/EESK.2006.10.6.133

Fiber Optic Sensor for the Detection of Abnormal Structural Signals from Various Constructions  

Kwon, Il-Bum (한국표준과학연구원)
Lee, Youn-Jae (한남대학교 물리학과)
SeoMoon, Ung (한국표준과학연구원)
Jo, Jae-Heung (한남대학교 물리학과)
Publication Information
Journal of the Earthquake Engineering Society of Korea / v.10, no.6, 2006 , pp. 133-135 More about this Journal
Abstract
We propose and fabricate a novel fiber optic sensor for the detection of abnormal structural signals from various constructions. It's advantages are highly sensitive. small in dimension and electro-magnetic immune. Since this sensor was simply constructed with a single-mode fiber at infra-red wavelength and a laser-diode with the wavelength of 625 nm, the modes in the end of the optical fiber were not show as Gaussian distributed. So, we used the change of the mode distribution to get the sensor output by the external abnormal effect of structures. We investigated the resonance by performing the bending test of an aluminum beam attached with the fiber sensor. In the test, we could obtained a feasible signal to sense the abnormal condition of structures.
Keywords
optical fiber; fiber sensor; anormal structural signals; longitudinal mode change;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
연도 인용수 순위
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