Research on Field Application Technology of Dynamic Angle Measurement Based on Fiber Optic Gyroscope and Autocollimator

For the purpose of realizing the dynamic angle measurement and calibration of the inertial equipment (such as rotary table), a dynamic angle measurement system based on the autocollimator and the fiber optic gyroscope (FOG), which can be used as an angle standard device, is designed in this paper. In this system, the scale factor of the FOG can be calibrated in the field application based on the autocollimator with the precision of $1^{\prime \prime }$ in the range of ±0.05°. Furthermore, the angle measurement deviation between the FOG and the rotary table can be limited in $\pm 3^{\prime \prime }$ when the scale factor of the FOG is calibrated by the autocollimator when necessary. This research can guarantee the long-term accuracy of the scale factor of the FOG in the field application and it will greatly promote the applications of the FOG as an angle standard device in the field of dynamic angle measurement.