光电经纬仪对心偏差引起的方位测角误差补偿方法

针对经纬仪测量过程存在的对心偏差问题,分析了经纬仪对心偏差对方位测角误差的影响规律,建立了相应的误差补偿模型。通过在经纬仪下方固连CCD摄像头检测对心偏差大小和方向,利用建立的误差补偿模型对对心偏差引起的方位测角误差进行补偿。并对补偿模型本身存在的误差进行了研究,表明其满足经纬仪高精度测角要求。相比传统的对心方法,在同等测角精度要求下,误差补偿的方法降低了测角时与目标的距离的限制,提高了经纬仪方位测角的自动化程度,缩短了操作时间。

Compensation method for azimuth measurement error by centering deviation of photoelectric theodolite

Aiming at centering deviation problem,the effect law of theodolite’s centering deviation on azimuth measurement error is analyzed,and the error compensation model is setup.The value and direction of centering deviation are detected by CCD fixed on the surface below theodolite,and the azimuth measurement error by centering deviation can be compensated by the error model.The error of the model itself is studied.It reveals that the model precision can meet the need of high-precision angle measurement of theodolite.The presented compensation method,the measuring distance limitation is reduced for the same precision compared with the traditional method,and the automation degree of azimuth angle measurement of theodolite is also improved and the operation time is reduced.