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谐振式光纤陀螺是基于光学Sagnac效应来测量载体旋转角速度的一种新型传感器.利用调相谱检测技术,建立了谐振式陀螺的开环响应测试系统.利用自行研制的锁相放大器和反馈控制电路,得到了线性度很好的解调曲线.从解调曲线的线性工作区可进一步得到系统的动态范围高达+4.2～-4.2rad/s.通过对顺时针和逆时针光路采用不同的频率调制,成功地观察到对应两个不同旋转方向的陀螺开环响应输出信号.最后,对系统的零漂进行了测试,在5s时间内观察到系统的零漂为0.02rad/s.
Resonant fiber optic gyroscope is a new type of sensor based on the optical Sagnac effect to measure the rotational angular velocity of the carrier.Using the technique of phase spectrum detection, an open-loop response test system for resonant gyroscope is established.By the self-developed lock-in amplifier and feedback control circuit , Get a good linearity of the demodulation curve.From the linear work area of the demodulation curve can be further obtained the dynamic range of the system up to + 4.2 ~ -4.2rad / s.By using different frequency modulation for clockwise and counterclockwise optical path , The gyro open-loop response output signal corresponding to two different rotation directions was successfully observed.Finally, the zero-drift of the system was tested and the zero-drift of the system was observed to be 0.02 rad / s in 5 seconds.