在高精度光纤陀螺小型化过程中,检测电路串扰问题越发严重,在复杂应用环境下难以采用基于转台的传统方法测试光纤陀螺串扰在输出中的表现。基于此,提出一种基于施加模拟转速阶梯波的测试方法。该方法使用专用电路生成台阶高度人为可控的阶梯波,利用加法电路将其与闭环阶梯波叠加接入Y波导,通过测试陀螺响应,可确定串扰大小。对该方法进行相关实验验证,实验结果表明:该方法能在不依赖于转台的条件下实现光纤陀螺检测电路串扰的自检测,提升了应用系统的设计与测试效率。

The crosstalks in detection circuits in the process of miniaturization for high-precision fiber-optic gyroscopes (FOG) become increasingly serious. In complex application conditions, it is difficult to measure crosstalks in the FOG output using traditional methods based on turntables. In this paper, we propose a method for measuring crosstalks based on simulated rotation rate phase ramp. We implement a specially designed circuit to generate a controllable phase ramp, combine it with a closed-loop phase ramp, and then connect the Y-waveguide using an adding circuit. This method can correctly estimate the crosstalk magnitude by testing gyroscope response. Related experiments are conducted, and experimental results show that the proposed method can realize the self-inspection of crosstalk in FOG detection circuits without turntables and improve the design and test efficiencies for application systems.