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FOG fiber ring Symmetry Detection System Implementation

Author: ZhouYouWei
Tutor: YaoXiaoTian
School: Tianjin University
Course: Optical Engineering
Keywords: FOG Fiber optic ring Shupe effect Symmetry Temperature incentive Eigenfrequency
CLC: TP274
Type: Master's thesis
Year: 2008
Downloads: 193
Quote: 1
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Abstract


FOG temperature drift is constraining the accuracy of the main factors , although in the ideal case , symmetric winding method by winding fiber ring should be able to inhibit the thermally induced optical ring nonreciprocal phase shift , but a variety of non-ideal factors a serious impact on the quality of fiber optic ring winding . This article is based on the fiber ring is applied to detect the temperature excitation winding symmetry fiber ring method can be used to achieve a fiber ring symmetry detection systems . In this thesis, completed work includes : Based on the fiber ring three-dimensional temperature response model was constructed through the fiber ring applied temperature incentives to detect fiber ring wound quality systems, including fiber optic gyro system optical path , temperature control and temperature excitation source design. In the process of building detection system for fiber optic ring is not easy to accurately measure the intrinsic frequency of issues, from starting FOG modulation principle proposed a new symmetrical square wave modulation based on a test fiber ring eigenfrequencies approach. Compared with the existing testing methods , this method has higher accuracy, speed , easy to implement automatic measurement . Symmetry detection method based on fiber-optic ring the implementation process , designed a Labview-based detection system for the control and test software. Its main features include fiber optic ring eigenfrequency fast measurement , data collection, storage and display module, gyro system calibration module, the detection system Allan variance analysis module , data processing module . With detection system and software test platform , to carry out a comparison of different excitation source in the detection fiber ring symmetry effectiveness experiments, analyzed experimentally determined fiber ring symmetry for detecting a temperature of more effective excitation source ; By detecting symmetry different fiber loop experiments successfully verified the detection system for detecting the effectiveness of fiber ring symmetry .

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