基于公路信息模型的三维交互式可视化研究

发布时间：2019-01-06 14:16

【摘要】：目前我国交通基础设施建设正经历着前所未有的高速发展,对公路的勘测设计、运营维护等阶段的信息集成与管理提出了更高、更新的要求,现有信息管理模式暴露出归档方式繁琐、展示形式陈旧、分析功能匮乏、共享机制缺失等问题,难以满足建设施工单位和运维管理单位对信息管理、查询、分析的需求。本文综合应用公路勘测设计理论和信息模型理论,建立了公路信息模型,并在此基础上,对公路三维交互式可视化理论与方法进行了深入的研究。主要研究内容和成果如下： 1.对空间地理信息、公路线路信息和运维信息的数据模型和行为模型开展研究,设计了信息的提取算法和数据接口,并建立格网-R树索引和格网-顶点-三角形三级索引两种检索方式进行信息的检索与定位,最终实现了公路信息模型的构建。 2.在公路信息模型的基础上,首先应用约束Delaunay三角网理论进行地形地质建模；然后应用参数化建模和交互式建模等方法进行公路三维建模；最后将各种模型进行无缝拼合,从而实现了公路三维场景的整体建模。 3.对大规模公路场景组织结构进行研究,采用有向无环图结构对复杂场景进行分类管理、分层组织,并应用视锥裁剪、动态调度、碰撞检测等关键技术,实现了三维场景的高效组织与调度。 4.采用顾及约束误差的半边折叠算法进行模型的快速简化,并通过创建操作层次结构进行模型的重构,实现了公路三维场景的交互式漫游、场景编辑与修改等功能。 5.综合应用上述研究成果,开发了面向公路建设与运维管理的三维交互式可视化系统,已成功应用到长沙市南湖路湘江过江隧道和青兰高速河北邯郸段等工程项目的建设、运维管理中。
[Abstract]:At present, the construction of transportation infrastructure in our country is experiencing an unprecedented rapid development, which puts forward higher and newer requirements for the information integration and management in the stages of highway survey, design, operation and maintenance, etc. The existing information management mode exposes the problems such as tedious archiving mode, obsolete display form, lack of analysis function, lack of sharing mechanism, etc. It is difficult to meet the needs of information management, query and analysis of construction units and operation and maintenance management units. Based on the theory of highway survey and design and the theory of information model, a highway information model is established in this paper. On this basis, the theory and method of 3D interactive visualization of highway are deeply studied. The main contents and results are as follows: 1. The data model and behavior model of spatial geographic information, highway line information and operation and maintenance information are studied, and the information extraction algorithm and data interface are designed. Finally, the highway information model is constructed by establishing the grid R-tree index and the grid vertex-triangle three-level index to retrieve and locate the information. 2. On the basis of highway information model, terrain and geology modeling is carried out by applying constrained Delaunay triangle network theory, and then highway 3D modeling is carried out by parameterized modeling and interactive modeling. Finally, all kinds of models are jointed seamlessly to realize the whole road 3D scene modeling. 3. The structure of large-scale highway scene organization is studied. The structure of directed acyclic graph is used to classify and manage the complex scene, and the key technologies, such as cone clipping, dynamic scheduling, collision detection and so on, are applied. The efficient organization and scheduling of 3D scene are realized. 4. The half-edge folding algorithm with constraint error is adopted to simplify the model quickly, and the model is reconstructed by creating the operation hierarchy. The interactive roaming, scene editing and modification of the 3D scene of highway are realized. 5. Based on the above research results, a 3D interactive visualization system for highway construction and operation and maintenance management has been developed. It has been successfully applied to the construction of Xiangjiang River Crossing Tunnel of Nanhu Road in Changsha City and Handan Section of Qinglan Expressway in Hebei Province. Operation and maintenance management.
【学位授予单位】：中南大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U495

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