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http://dx.doi.org/10.7234/kscm.2012.25.6.211

Fixation Method of Prestressed Fiber Optic Sensor  

Kim, Ki-Soo (홍익대학교 재료공학부)
Publication Information
Composites Research / v.25, no.6, 2012 , pp. 211-216 More about this Journal
Abstract
FBG sensor peaks could be split due to polarization by shear strain, when the fiber optic sensors embedded or attached to the structure. For the fiber optic sensor packages, sensor grating has to be protected from shear strains. Also, pretension has to be applied to the sensor because compressive strain must be measured. Without pretension of sensor, the sensor does not show any change of signal until it is stretched. In order to mesure compressive and tensile strains, two fixing point and prestressed sensor need. In the fixing point, just holding the optical fiber cause slip between core and cladding in the fiber. A Fixation method of prestressed FBG sensors fixed with partially stripped fibers was developed. The sensor package has the prestress controllable fixtures at the fixing points. Prestress to the sensor imposed by controlling the two fixed points with bolts and nuts make it easy to measure compressive strain as well as tensile strain. The fiber optic sensor packages applied to the actual structure and the structural monitoring system using the package can be applied to safety through surveillance.
Keywords
fiber optic sensor; sensor packages; prestressed sensors; partial stripping; monitoring system;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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