A novel calibration method for non-orthogonal shaft laser theodolite measurement system.
A novel calibration method for non-orthogonal shaft laser theodolite measurement system.
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DOI：
10.1063/1.4943017
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发表时间：
2016-03
期刊：
影响因子：
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通讯作者：
Bin-ping Wu;Fengting Yang;W. Ding;T. Xue
中科院分区：
文献类型：
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作者：
Bin-ping Wu;Fengting Yang;W. Ding;T. Xue
非正交轴激光经纬仪（n-经纬仪）是一种由两个转台和一个准直激光器组成的新型大型计量仪器。n型经纬仪有三个轴。根据传统经纬仪的命名惯例，将两个转台的旋转轴分别称为水平轴和垂直轴，将准直的激光束称为瞄准轴。而n -经纬仪与传统经纬仪的区别是明显的，因为n -经纬仪没有正交和相交的精度要求。因此传统经纬仪的标定方法已经不适用于n型经纬仪，而目前所采用的标定方法又十分复杂。为此，本文提出了一种新的非正交轴激光经纬仪测量系统标定方法，简化了标定程序，提高了标定精度。提出了一种简单的两步过程，即内部参数的校准和外部参数的校准。实验证明了该方法的有效性和准确性。
Non-orthogonal shaft laser theodolite (N-theodolite) is a new kind of large-scale metrological instrument made up by two rotary tables and one collimated laser. There are three axes for an N-theodolite. According to naming conventions in traditional theodolite, rotary axes of two rotary tables are called as horizontal axis and vertical axis, respectively, and the collimated laser beam is named as sight axis. And the difference between N-theodolite and traditional theodolite is obvious, since the former one with no orthogonal and intersecting accuracy requirements. So the calibration method for traditional theodolite is no longer suitable for N-theodolite, while the calibration method applied currently is really complicated. Thus this paper introduces a novel calibration method for non-orthogonal shaft laser theodolite measurement system to simplify the procedure and to improve the calibration accuracy. A simple two-step process, calibration for intrinsic parameters and for extrinsic parameters, is proposed by the novel method. And experiments have shown its efficiency and accuracy.