基于数据配准提高光电经纬仪的测量精度

研究了目标相对于视场中存在相对运动时,光电经纬仪测量精度下降,且下降程度与目标相对运动速度的大小相关的现象。基于电视曝光原理分析了这种现象产生的原因,讨论了提高光电经纬仪事后处理精度的新方法。提出了基于目标脱靶量与编码器位置信息的数据配准方法,并对该算法实际操作的可行性进行了分析。实验结果表明,此算法可以使光电经纬仪测量精度改善20%～30%,即CCD像素分辨率从1/2提高到了1/3。

Improvement of measuring precision for electro-optical theodolite based on data matching

The measuring precision of an electro-optical theodolite will fall down when the target moves relatively the measuring device. Moreover, the precision falling is more dependent on the speed of the relative movement. To improve the measuring precision of the electro-optical theodolite, this paper researches the reasons of above phenomena based on the TV exposure principle and proposes a new method to improve the data processing accuracy. The data matching algorithm based on the target missing and encoder position is proved in a simulation, and its feasibility for operating is also analyzed. The experimental results show that the algorithm can improve the measuring precision of the electro-optical theodolite by 20%~30%, which means that the measuring precision improves from 1/2 to 1/3 pixel of CCD.