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http://dx.doi.org/10.5139/JKSAS.2005.33.3.032

The Signal Characteristics of Reflected Spectra of Fiber Bragg Grating Sensors with Strain Gradient and Grating Lengths  

Kang, Dong-Hoon (한국철도기술연구원 남북철도기술개발사업단)
Park, Sang-Oh (한국과학기술원)
Kim, Chun-Gon (한국과학기술원)
Publication Information
Journal of the Korean Society for Aeronautical & Space Sciences / v.33, no.3, 2005 , pp. 32-38 More about this Journal
Abstract
FBG sensors have been studied more actively than any other fiber optic sensor because of good multiplexing capabilities among many fiber optic sensors. The demodulation method of FBG sensors is based on the detection of wavelength shift of their sensor peaks and properties such as strain and temperature can be measured by detecting them. However, the signal stability of FBG sensors can be influenced by the strain gradient induced by structural geometry or cracks on the surface when FBG sensors are embedded into or attached on the structure. In this study, the signal characteristics of reflected spectra of FBG sensors under strain gradient were verified and the relations between the grating length of FBG sensors and the amount of strain gradient were investigated. From the experimental results, the recommended working range of FBG sensors under strain gradients was shown quantitatively with respect to grating lengths of them.
Keywords
Fiber Bragg Grating; Grating Length; Strain Gradient; Signal Characteristics;
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Times Cited By KSCI : 1  (Citation Analysis)
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