機(jī)載LiDAR系統(tǒng)檢校方法研究
發(fā)布時間：2019-06-14 01:40
【摘要】：機(jī)載LiDAR作為一種新型對地觀測技術(shù)，能快速獲取大范圍地形表面點(diǎn)的三維坐標(biāo)，進(jìn)而得到高精度、高分辨率的DSM和DEM，因此受到各個領(lǐng)域的關(guān)注。經(jīng)過十幾年來的快速發(fā)展，機(jī)載LiDAR在硬件和系統(tǒng)集成方面已經(jīng)相當(dāng)成熟，，目前國際市場上已有不少成熟的商業(yè)系統(tǒng)。然而相對于機(jī)載LiDAR系統(tǒng)的硬件技術(shù)，機(jī)載LiDAR數(shù)據(jù)的后處理與應(yīng)用研究則發(fā)展緩慢，其中，制約其發(fā)展的關(guān)鍵問題之一是機(jī)載LiDAR系統(tǒng)誤差的消除。系統(tǒng)誤差是影響機(jī)載LiDAR精度的主要因素，而系統(tǒng)檢校又是消除系統(tǒng)誤差的主要方法，盡管國內(nèi)外對此已有不少的研究，但是目前仍然缺乏一種標(biāo)準(zhǔn)的檢校方法。本文在機(jī)載LiDAR系統(tǒng)定位原理的基礎(chǔ)上，定量分析系統(tǒng)誤差的影響，建立誤差模型，進(jìn)而提出了兩種系統(tǒng)檢校的方法。論文的主要內(nèi)容如下： 1.介紹了機(jī)載LiDAR的系統(tǒng)組成及其工作原理，推導(dǎo)了機(jī)載LiDAR的幾何定位方程。 2.分析了影響機(jī)載LiDAR定位精度的各種系統(tǒng)誤差源，并根據(jù)機(jī)載LiDAR的幾何定位方程重點(diǎn)對安置角誤差的影響進(jìn)行了定量分析。 3.根據(jù)安置角誤差的影響，設(shè)計(jì)了一種手工檢校安置角的方法，并推導(dǎo)出相應(yīng)的檢校公式；根據(jù)系統(tǒng)定位原理，建立相應(yīng)的誤差模型，提出了一種自動檢校安置角的方法；并使用實(shí)測檢校場數(shù)據(jù)對本文提出的兩種檢校方法進(jìn)行測試。 研究機(jī)載LiDAR的系統(tǒng)檢校方法，開發(fā)相應(yīng)的檢校軟件，是提高其數(shù)據(jù)精度的關(guān)鍵所在，也是目前機(jī)載LiDAR數(shù)據(jù)處理研究的熱點(diǎn)之一。本文的研究對機(jī)載LiDAR系統(tǒng)檢校研究具有一定的實(shí)用參考價值。
[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
本文編號：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
本文編號：2498991
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