机载LiDAR系统检校方法研究
发布时间：2019-06-14 01:40
【摘要】：机载LiDAR作为一种新型对地观测技术，能快速获取大范围地形表面点的三维坐标，进而得到高精度、高分辨率的DSM和DEM，因此受到各个领域的关注。经过十几年来的快速发展，机载LiDAR在硬件和系统集成方面已经相当成熟，，目前国际市场上已有不少成熟的商业系统。然而相对于机载LiDAR系统的硬件技术，机载LiDAR数据的后处理与应用研究则发展缓慢，其中，制约其发展的关键问题之一是机载LiDAR系统误差的消除。系统误差是影响机载LiDAR精度的主要因素，而系统检校又是消除系统误差的主要方法，尽管国内外对此已有不少的研究，但是目前仍然缺乏一种标准的检校方法。本文在机载LiDAR系统定位原理的基础上，定量分析系统误差的影响，建立误差模型，进而提出了两种系统检校的方法。论文的主要内容如下： 1.介绍了机载LiDAR的系统组成及其工作原理，推导了机载LiDAR的几何定位方程。 2.分析了影响机载LiDAR定位精度的各种系统误差源，并根据机载LiDAR的几何定位方程重点对安置角误差的影响进行了定量分析。 3.根据安置角误差的影响，设计了一种手工检校安置角的方法，并推导出相应的检校公式；根据系统定位原理，建立相应的误差模型，提出了一种自动检校安置角的方法；并使用实测检校场数据对本文提出的两种检校方法进行测试。 研究机载LiDAR的系统检校方法，开发相应的检校软件，是提高其数据精度的关键所在，也是目前机载LiDAR数据处理研究的热点之一。本文的研究对机载LiDAR系统检校研究具有一定的实用参考价值。
[Abstract]:As a new type of ground observation technology, airborne LiDAR can quickly obtain the three-dimensional coordinates of surface points in a wide range of terrain, and then obtain high precision. High-resolution DSM and DEM, have attracted the attention of various fields. After more than ten years of rapid development, airborne LiDAR has been quite mature in hardware and system integration. At present, there are many mature commercial systems in the international market. However, compared with the hardware technology of airborne LiDAR system, the research on post-processing and application of airborne LiDAR data is slow, among which, one of the key problems restricting its development is the elimination of airborne LiDAR system error. System error is the main factor affecting the accuracy of airborne LiDAR, and system calibration is the main method to eliminate system error. Although there have been a lot of research at home and abroad, there is still a lack of a standard calibration method. Based on the positioning principle of airborne LiDAR system, this paper quantitatively analyzes the influence of system error, establishes the error model, and then puts forward two kinds of system calibration methods. The main contents of the paper are as follows: 1. The system composition and working principle of airborne LiDAR are introduced, and the geometric positioning equation of airborne LiDAR is derived. two銆
本文编号：2498991
[Abstract]:As a new type of ground observation technology, airborne LiDAR can quickly obtain the three-dimensional coordinates of surface points in a wide range of terrain, and then obtain high precision. High-resolution DSM and DEM, have attracted the attention of various fields. After more than ten years of rapid development, airborne LiDAR has been quite mature in hardware and system integration. At present, there are many mature commercial systems in the international market. However, compared with the hardware technology of airborne LiDAR system, the research on post-processing and application of airborne LiDAR data is slow, among which, one of the key problems restricting its development is the elimination of airborne LiDAR system error. System error is the main factor affecting the accuracy of airborne LiDAR, and system calibration is the main method to eliminate system error. Although there have been a lot of research at home and abroad, there is still a lack of a standard calibration method. Based on the positioning principle of airborne LiDAR system, this paper quantitatively analyzes the influence of system error, establishes the error model, and then puts forward two kinds of system calibration methods. The main contents of the paper are as follows: 1. The system composition and working principle of airborne LiDAR are introduced, and the geometric positioning equation of airborne LiDAR is derived. two銆
本文编号：2498991
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