光纤陀螺是一种典型的微弱信号检测系统.根据随机过程理论,针对陀螺噪声特点设计了数字闭环光纤陀螺实用的同步相关检测方案,并对陀螺干涉仪输出信号中出现的尖峰脉冲干扰,提出一种基于高速模拟开关的时域滤波方法.测试结果表明,此方法大大降低了陀螺的输出噪声,是将陀螺信号从强噪声中提取出来的有效手段.%Fiber optic gyroscopes are typical weak signal detection systems.In this paper,a synchronous correlation detection applicable for digital close-loop fiber optical gyroscope is designed in terms of gyroscope noise characteristics.A time-domain filtering method based on high speed analog switch is proposed for elimination of spike pulse interference generated by signal output from gyroscope interferometer.It is shown by the test that this method is effective to reduce the gyroscope output noise and extract gyroscope signal from strong noise.
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