【摘要】 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.更多还原

【Abstract】 The resonator fiber optic gyro (R-FOG),which utilizes a resonance frequency change due to the Sagnac effect,is a promising candidate for the next generation inertial rotation sensor.In this study,an open-loop R-FOG is set up using phase modulation spectroscopy.First,the demodulation curve is obtained using a lock-in amplifier.From the demodulation signal,a gyro dynamic range of ±4.2rad/s is obtained.Then,using different phase modulation frequencies,the open-loop gyro output signal is measured when the gyro is rotated clockwise or counterclockwise.The bias drift as a function of time is also measured.The fluctuation of the output over 5s is about 0.02rad/s.The drift can be reduced by taking countermeasures against system noise.更多还原