再入式光纤陀螺实用化技术研究

Research on the Practicality of Re-entrant Fiber Optic Gyroscope

再入式光纤陀螺(R e-FOG)使相互干涉的两路光循环进入光纤环,通过缩短光纤长度克服温度和应力引起的误差。本文研究了再入式光纤陀螺实用化的相关技术;提出了一种采用脉冲相位调制的信号检测方法;设计了专门的数据通讯模块。实验结果表明:所提出的信号检测方法可分离出所需循环次数的信号并解算出陀螺转速;所设计的通讯模块能保证实现陀螺与导航计算机之间的快速、稳定、准确的数据传送。再入式光纤陀螺可成为实用化的新型光纤陀螺。

In a Re-entrant fiber optic gyro （Re-FOG）, parts of the two counter-propagating lights re-enter the Sagnac sensitive ring（SSR）. Re-FOG is a new kind of fiber optic gyro（FOG）, which may lower the error induced by thermal and stress by using a shorter SSR. In this paper the practicality of Re-FOG is studied. A signal detection method which modulates the phase with a serial of pulses is presented and a communication interface is introduced. The experiment results show that the signal detection method can separate the signal of different number of recycling and get the rotation speed of the Re FOG, the data transfer between Re-FOG and navigation computer can be accomplished lastly, smoothly and precisely. It is clear that the Re-FOG is practical, if some improvements are achieved.