摘要
非正交轴系"激光经纬仪"(简称非正交轴系经纬仪)在长时间的使用过程中视准轴参数发生微小的变化将会严重影响测量精度,因此有必要对视准轴的参数进行校正。本文提出了一种基于非正交轴系经纬仪前方交会原理的视准轴参数校正方法,首先利用交会约束建立关于视准轴参数的非线性方程组,然后通过解方程组得到校正后的参数。为了验证方法的正确性,使用SolidWorks建立模型并结合OpenGL进行了仿真计算,然后进行了相应的实验。结果表明,本文方法能有效校准视准轴参数,且具有很高的精度;用本文方法对视准轴进行校正后,非正交轴系经纬仪测量系统的测量精度没有受到影响。由于本文校正方法不需要借助其他辅助仪器且校正过程简单,故可以在测量现场对视准轴进行实时校正,具有一定的实用性。
Due to the special structure of non-orthogonal axes （N-Theodolite）,the parameters of the sight axis of the N-Theodolite may change slightly after transportation or being used for a long time. Such subtle variation will result in a great decrease in measurement precision. So it is necessary to correct the sight axes to guarantee the measurement result and thus make the instrument more practical. To solve the problem,this paper proposes a correction method for the sight axis based on forward intersection of N-Theodolites. The method uses the intersection constraint to establish the equations for the parameters of the sight axis and the parameters can thus be obtained by solving the equations. To verify the method, simulations based on SolidWorks software and OpenGL are conducted, and the experiments using N- Theodolite are also performed. The simulation results show that the method can effectively correct the parameters of the sight axis with high precision. In the experiment, after correction, the N-Theodolite system can measure the length of the standard scale bar with the same precision of the N-Theodolite system with correct sight axes parameters. Moreover, the sight axis can be corrected in the field because the method doesn＇t involve other precision instruments.
出处
《光电子．激光》
EI
CAS
CSCD
北大核心
2015年第9期1700-1706,共7页
Journal of Optoelectronics·Laser
关键词
非正交轴系
激光经纬仪
交会
视准轴
参数校正
non-orthogonal axes
laser theodolite
intersection
sight axis
parameter correction
