谐振式光学陀螺入谷信号的判断方案

Judgment scheme of entering the valley of resonant optical gyro

谐振式光学陀螺是一种新型的惯性传感器件,通过控制扫描频率锁定在谐振谷中,检测频率变化引起的光强变化从而计算出转速信号。在谐振陀螺系统中,入谷电压的判断是谐振陀螺检测系统中的第一步。由于选用的光源不同,对于光源的调频方式不同,调频方式对于光源的影响也不相同,因此对于入谷电压的判断方法也不同。根据两种光源条件下对于光源入谷电压的判断进行了分析,并且对于光源功率随频率变化的情况进行了重点分析,提出了两种入谷电压的判断方案,通过比较两种方法的差别,最终选用了模拟方法,并且经过实验验证,取得了很好的效果。

The resonant optical gyro is a new generation of inertial sensor,the rotate speed can be detected by controlling the frequency locked in the resonant valley and inspecting the variety of light intensity caused by the variety of frequency.In the system of resonant optical gyro,the first step of the detection is the judgment of entering into the resonant gyro.As the light source used by the system is different,the method of modulation is different,the effecting of light caused by the modulation is different,so the judgment of entering in the resonant gyro is different.According to the two light conditions,this paper analyses the judgment method of entering in the resonant gyro.And it is focused on the circs of the light power changes with frequency.And two schemes has been put forward.By comparing the different methods,the analog method has been used,via the experiment verification,achieved good results.