摘要
谐振式光纤陀螺R-FOG(Resonator Fiber Optic Gyro)是基于Sagnac效应产生的谐振频率差来测试旋转角速率的一种新型传感器。实验对比了三种调制波形对谐振信号信噪比的影响,分析了锯齿波调制中复位脉冲问题以及三角波调制中的瞬态响应问题,确定了正弦波为最佳调制波形,提高了谐振信号的信噪比。在陀螺系统的锁频环路中,通过正弦波调制、解调得到了用于边带锁频(PDH)技术稳频的解调曲线,验证了正弦波调制方法的可行性及优越性。
Resonator Fiber Optic Gyro（R-FOG） is a novel optical sensor whose resonant frequency is changed due to the sagnac effect. The different influence of three kinds of waveforms on the SNR of resonant signal is analyzed including the reset pulse problem in sawtooth wave and transient response in triangle wave. The sine wave is chosen as the optimized modulation signal by improving the SNR of system design. The demodulation curve is obtained by sine wave modulation and demodulation for Pound-Drever-Hall （PDH）method which proved the feasibility and superiority of sine wave modulation technique in R-FOG.
出处
《传感技术学报》
CAS
CSCD
北大核心
2013年第7期946-949,共4页
Chinese Journal of Sensors and Actuators
基金
国家自然科学基金项目(91123036
61178058
61275166)
山西省自然科学基金项目(2010011003-2)
关键词
光纤光学
谐振式陀螺
相位调制
信噪比
解调曲线
fiber optics
R-FOG
phase modulation
signal to noise ratio
demodulation curve
