11 October 2010 Research on fiber-optic gyroscope signal detection with lock-in amplifier
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Abstract
Application Principles of Lock-in amplifier for the detection of weak signals are represented in the paper. Fiber optic gyroscope ,a newest rate sensor is analysized about its' Sagnac effect, as well as the source of optical noise. The signal of fiber optic gyroscope is submerged in the optical noise and circuit noise. Based on the signal characteristics of the fiber optic gyroscope, a detective method with Lock-in amplifier is presented. Finally, a simulation with Matlab is done , from the simulative results, konwing that bandwidth of equivalent noise is greatly reduced with the detective method of Lockin amplifier. Thereby signal to noise ratio is increased, so the precision of fiber-optic gyroscope is enhanced.
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Xia Zhang, Tianze Li, Xiaojie Song, Chuan Jiang, "Research on fiber-optic gyroscope signal detection with lock-in amplifier", Proc. SPIE 7656, 5th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optical Test and Measurement Technology and Equipment, 76561O (11 October 2010); doi: 10.1117/12.864203; https://doi.org/10.1117/12.864203
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