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The dual parameters simultaneously distinguish measurement of fiber grating sensor

Author: ZhaoXue
Tutor: BaiJinTao
School: Northwestern University
Course: Optics
Keywords: Fiber Bragg Grating Discriminating measurement Cross-sensitivity
CLC: TN253
Type: Master's thesis
Year: 2009
Downloads: 100
Quote: 1
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Abstract


Fiber Bragg grating (FBG) is an international emerging , applied to the field of fiber-optic communications , optical fiber sensing and optoelectronics processing , and has a broad application prospects basic fiber optic devices . FBG production become the focus and emphasis of the world fiber technology research and applied research . Bragg fiber grating sensors using Bragg wavelength of the temperature strain sensitive features made ??of a new type of fiber optic sensors , it has anti-electromagnetic interference , high accuracy , good stability and long-term , multi-point distribution and detection in large composites and concrete structure monitoring , performance monitoring of smart materials , electric power industry , pharmaceutical and chemical field has broad application prospects . In this paper, the key issues of cross-sensitivity fiber grating temperature and strain sensors are analyzed and discussed and given their own design . First, summed up the temperature of the fiber Bragg grating strain distinguish between measurement technology development status at home and abroad as well as the key technical and difficult at the same time . Secondly , the sensing principle for fiber grating temperature sensing, strain sensing and sensing methods summarized . Then described the dual - parameter sensing principle of fiber Bragg grating sensors , summarizes the parameters of existing fiber grating sensors dual simultaneous measurement method , and its strengths and weaknesses were analyzed and summarized . Finally, the simultaneous measurement design based on the combination of fiber grating temperature Izod strain . Cantilever side paste a fiber Bragg grating (FBG), based on fiber grating under stress produce the same size , the opposite direction of the simultaneous measurement of the Bragg wavelength drift , the use of theoretical analysis to achieve the temperature , strain .

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CLC: > Industrial Technology > Radio electronics, telecommunications technology > Photonics technology,laser technology > Optical waveguide and integrated optics > Fiber optic components
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