车载摄影测量系统标校方法研究

发布时间：2018-06-16 15:01

本文选题：移动测量 + 坐标系　；参考：《解放军信息工程大学》2013年硕士论文

【摘要】：本文的研究对象是车载摄影测量系统。本文的主题是探讨使用高精度激光跟踪仪对车载摄影测量系统POS定位定姿精度进行评定的方法。本文介绍了移动测量系统的发展，，测量的原理和涉及的坐标系，推导利用一种新的数学模型进行坐标系转换的平差过程，提出了用激光跟踪仪检校POS定位定姿精度的方法并对其效果进行验证。具体工作如下： 1．介绍了移动测量系统的发展历史及研究现状，移动测量系统的构成及其测量原理，总结了车载摄影测量系统涉及的四个主要坐标系及其换算关系。 2．为了满足快速坐标转换的需求，将一种由旋转轴向量和旋转角度形成的旋转矩阵用于坐标系旋转，在此基础上提出8参数的坐标转换模型，给出了根据公共点对进行平差求解坐标系转换模型的8个参数的过程，并进行了验证，实验表明该方法迭代次数少，精度与传统的方法相同。 3．提出了在室外利用激光跟踪仪评定POS定位定姿精度的方法。在车载摄影测量系统的POS正常工作时，将载车停于不同的姿态和位置静止时，分别用激光跟踪仪测量固定于载车上的6个点，并获得它们的WGS84坐标，用于POS定位定姿精度的评定。 4．从两个方面评定POS输出的位置和姿态的精度。首先由固定点的POS载体坐标和POS输出的位置姿态计算WGS84坐标并与激光跟踪仪测得的WGS84坐标做差评定POS的定位精度，然后由激光跟踪仪测得的WGS84坐标和固定点的POS载体坐标计算载车的位置姿态并与POS输出的位置姿态做差评定POS输出的位置姿态精度。最后对两种方法做了分析，并与已有的评定结果做了比较分析。
[Abstract]:The object of this paper is vehicle photogrammetry system. The main topic of this paper is to discuss the method of evaluating the positioning and attitude determination accuracy of POS in vehicle photogrammetry system by using high precision laser tracker. This paper introduces the development of mobile measurement system, the principle of measurement and the coordinate system involved, and deduces the adjustment process of coordinate system transformation using a new mathematical model. A method to calibrate the positioning accuracy of POS with laser tracker is proposed and its effect is verified. The main work is as follows: 1. The development history and research status of mobile measurement system are introduced, the structure of mobile measurement system and its measuring principle are introduced. This paper summarizes the four main coordinate systems and their conversion relations involved in the vehicle photogrammetry system. 2. In order to meet the requirements of rapid coordinate transformation, a rotation matrix formed by the rotation axis vector and the rotation angle is used to rotate the coordinate system. On this basis, a coordinate transformation model of eight parameters is proposed, and the process of solving the transformation model of coordinate system based on the common point pair adjustment is given, and it is verified that the method has less iteration times. The accuracy is the same as the traditional method. 3. A method for evaluating the positioning accuracy of POS by laser tracker is proposed. When the POS of the vehicle photogrammetry system works normally, when the vehicle is parked at different positions and positions, the six points fixed on the vehicle are measured by laser tracker, and their WGS84 coordinates are obtained. It is used to evaluate the positioning and attitude accuracy of POS. 4. To evaluate the position and attitude accuracy of POS output from two aspects. Firstly, the WGS84 coordinates are calculated from the POS carrier coordinates of the fixed points and the position and attitude of the POS outputs, and the positioning accuracy of POS is evaluated by the difference between the WGS84 coordinates measured by the laser tracker and the WGS84 coordinates measured by the laser tracker. Then the WGS84 coordinates measured by the laser tracker and the POS carrier coordinates of the fixed point are used to calculate the position attitude of the loaded vehicle and to evaluate the position attitude accuracy of the POS output by the difference between the position attitude of the vehicle and the position attitude of the POS output. Finally, the two methods are analyzed and compared with the existing evaluation results.
【学位授予单位】：解放军信息工程大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：P23

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