基于光纤陀螺的全站仪组合定向技术研究

Study on Technology of The Total Station Combined Orientation Based on Fiber Optic Gyroscope

为实现在单个GPS控制点上直接完成角秒级的全站仪定向,提出了一种基于光纤陀螺的免安装误差标定全站仪定向方法。在该方法中,光纤陀螺与全站仪望远镜固连,利用全站仪望远镜带动光纤陀螺分别在4个特定位置做静态测量,获得全站仪横轴真方位角。通过仿真研究和组合试验,结果表明:该方法在不利的情况下,方位角误差可控制在30″以内,该精度能够满足日常测量工作需要。

A new method based on a fiber optic gyroscope （FOG） is proposed to orient a total station （TS） accurately without the need of another visible global positioning system （GPS） control point .In this method ,the FOG is fixed with the telescope of the TS .The FOG is driven by the TS to rotate in four specific positions .Based on the strict observation equations of four positions ,the formula to calculate the azimuth of the traverse axis of the TS with the four measurements is obtained ,which can effectively eliminate the influence from the installation error between the axis of the FOG and the traverse ax is of the TS .The numerical simulation and combination test shows that the method is in unfavorable situation ,the error of orientation can be controlled within the 30″,the precision can meet the needs of the daily measurements .