植被多角度光谱信息采集系统的设计与研究

发布时间：2019-04-27 04:29

【摘要】：随着遥感技术的不断发展,农业、林业、土地管理等领域的遥感信息模型如植被指数模型、土壤含水量模型、作物旱灾受损模型等研究日趋深入,地面遥感实验数据的采集与分析是其研究的基础。植被多角度光谱信息采集系统是应用于地面遥感实验中采集地表物体反射光谱数据的重要设备,其可以在半球空间快速测量地表各种物质的二向性反射率因子,应用于地理遥感系统,解决生态和遥感科学当中的诸多问题。本论文的主要工作包含以下三个方面。第一,通过对多角度观测系统的需求分析,设计了一款全新结构的植被多角度光谱信息采集系统,并搭建完成其控制系统,制作实验样机一台。实验样机特点在于整体质量较轻、结构简单、定位准确、观测模式多样、测量点足够丰富、测量范围内阴影小。第二,基于自主研发的植被多角度光谱信息采集系统实验样机,实施了机械系统精度评估实验,提出二维球面误差评估方法,采用遗传算法为核心的数据处理方法,得出实验样机的精度参数,并讨论了光谱仪视场受机械系统精度的影响。第三,针对不同观测目标,分别在室内环境与室外环境下实施了多角度光谱信息采集实验,测试了实验样机的各项观测功能,验证了机械系统与控制系统的可靠性与稳定性,并对实验采集数据进行了分析,得出初步结论,为典型地物波谱数据库积累了光谱数据。
[Abstract]:With the development of remote sensing technology, the research on remote sensing information models such as vegetation index model, soil moisture model and crop drought damage model in agriculture, forestry, land management and other fields is becoming more and more in-depth. The acquisition and analysis of ground remote sensing experimental data is the basis of its research. Vegetation multi-angle spectral information acquisition system is an important equipment for collecting reflection spectrum data of surface objects in ground remote sensing experiments. It can quickly measure the two-way reflectivity factors of surface materials in hemispherical space. It is applied to geographic remote sensing system to solve many problems in ecology and remote sensing science. The main work of this paper includes the following three aspects. Firstly, by analyzing the requirements of multi-angle observation system, a new vegetation multi-angle spectral information acquisition system is designed, and its control system is built, and an experimental prototype is made. The experimental prototype is characterized by light weight, simple structure, accurate positioning, variety of observation modes, abundant measuring points and small shadow in the measuring range. Secondly, based on the experimental prototype of vegetation multi-angle spectral information collection system developed independently, the precision evaluation experiment of mechanical system is carried out, and a two-dimensional spherical error evaluation method is put forward, and the data processing method based on genetic algorithm is used as the core. The precision parameters of the experimental prototype are obtained, and the influence of the field of view of the spectrometer on the precision of the mechanical system is discussed. Thirdly, multi-angle spectral information acquisition experiments are carried out in indoor environment and outdoor environment for different observation targets, and various observation functions of the experimental prototype are tested, and the reliability and stability of the mechanical system and the control system are tested, and the reliability and stability of the mechanical system and the control system are verified. The data collected from the experiment are analyzed and the preliminary conclusion is drawn, which accumulates the spectral data for the spectral database of typical ground objects.
【学位授予单位】：北京林业大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TP79;S127;TP274.2

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