正弦波调制对谐振式陀螺中谐振信号的影响  

Influence of sine-wave modulation on resonance signal of resonant gyroscope

作　　者：张建辉[1] 徐鹏飞[1] 李明慧[1] 薛晨阳[1] 刘俊[1] 闫树斌[1] 

机构地区：[1]中北大学仪器科学与动态测试教育部重点实验室 电子测试技术重点实验室,山西太原030051

出　　处：《传感器与微系统》2013年第11期5-7,10,共4页Transducer and Microsystem Technologies

基　　金：国家自然科学基金资助项目(91123036;61178058;61275166);山西省自然科学基金资助项目(2010011003-2);山西省教育厅优秀青年学术带头人资助项目

摘　　要：谐振式光纤陀螺(R-FOG)是利用光学Sagnac效应实现对转动角速度检测的一种高精度惯性传感器件。理论分析了正弦波调制特性,搭建了光学微谐振腔的调制解调实验系统,实验对比了正弦波、锯齿波、三角波3种调制波形对谐振信号信噪比的影响,得出了正弦波调制效果最好,提高了谐振信号的信噪比。针对不同调制幅度和频率条件下的正弦波调制对谐振信号的影响进行了测试,得出了调制幅度和调制频率对谐振信号的影响,为光学微谐振腔在谐振式陀螺系统应用中相位调制选择最佳的参数提供了参考。Resonant fiber-optic gyro（R-FOG） is a high-precision inertial sensor which use optical Sagnac effect to achieve rotation angular velocity detection. Theoretically analyze characteristics of sine wave modulation, built a modulation and demodulation test system of optical micro resonant cavity, then experimentally compare influences of three modulation waveform, respectively the sine wave, sawtooth wave and triangle wave, on signal to noise ratio of resonance signal, the effect of the sine wave modulation is the best and signal to noise ratio of resonance signal is improved. Test influence of sine wave modulation on resonance signal in condition of different modulation amplitude and frequency, and derive effect of modulation amplitude and modulation frequency on resonance signal. The result provides a reference for optical microresonant-cavity to select the best parameters of phase modulation in the resonator gyroscope system applications.

关 键 词：谐振式光纤陀螺 正弦波调制 信噪比 谐振信号 

分 类 号：TN29[电子电信—物理电子学]