直升机三维航迹规划与可视化仿真

针对目前大多数航迹规划研究中航迹规划结果直观性较差的问题,以直升机为对象,在对数字地图预处理的基础上规划其最优三维航迹．以建模工具Creator和开发工具Vega为平台,完成对地形地貌场景的三维建模及整个视景仿真系统的构建,并在此基础上利用VegaAPI和VC＋＋实现满足实时性要求的规划航迹三维可视化仿真演示．该系统为航迹规划和完整的视景演示提供有效方法和步骤．     

Research and application of 3D visualization and Internet of Things technology in urban land use efficiency management

Land is the basis for human beings to engage in economic and social activities, but the continuous acceleration of the process of economic development and urban expansion has brought about a series of ecological and urban problems. Therefore, the simulation of urban spatial expansion is very important for the rational planning of urban land and the promotion of sustainable urban development. The three-dimensional visualization of urban land allows users to have a perceptual understanding of urban construction, and enables decision makers, designers and users to have a more vivid and rational understanding of the current state of urban construction and planning and design blueprints. Based on this, this article combines three-dimensional imaging and Internet of Things technology to carry out the research on urban land utilization. First of all, this article discusses image modeling techniques such as texture mapping and panoramas, and applies these techniques to the model reconstruction of complex urban land. The model effectively combines graphics-based and image-based model reconstruction technology to construct a highly realistic three-dimensional urban landscape. Secondly, this article combines the Internet of Things and wavelet analysis to design an Internet of Things architecture for urban land use efficiency management. Finally, on the premise of taking into account the important results and the status quo of urban development, the countermeasures and suggestions for increasing the urban land use rate are put forward.     

基于虚拟现实的城市规划三维仿真设计系统

传统的规划设计CAD系统的三维功能很弱,难以进行空间关系分析和效果表达;而现有的城市仿真系统不具备规划设计能力,不能应用到规划设计过程中.结合CAD、3D、VR技术开发了一套规划仿真设计系统,,采用了基于专业对象的三维建模技术和虚拟现实技术,实现了二维设计过程中的规划设计对象的自动三维建模以及实时进行三维设计场景的虚拟呈现.结果表明,系统能极大地提高设计效率,能很好地进行空间关系分析,优化设计方案,并能通过虚拟场景以及系统输出的效果图和三维动画很好地表达设计意图,从而将城市规划设计技术从二维图纸阶段提升到三维仿真设计阶段.     

BIM-based task-level planning for robotic brick assembly through image-based 3D modeling

The application of robotics in the assembly of building bricks has become a popular topic, while the planning of construction robots is still lagged far behind the manufacturing industry. New robotic assembly task with manual teaching–planning method is always time consuming. A task-level planning method was proposed, and the implementation details were described to improve the planning efficiency of robotic brick assembly without affecting accuracy. In this work, a BIM (Building Information Model)-based robotic assembly model that contains all the required information for planning was proposed. Image-based 3D modeling was utilized to help the calibration of the robotic assembly scene and building task models. The placement point coordinates of each assembly brick were generated in the robot base coordinate system. Finally, three different building information model tasks of modular structures (e.g., wall, stair, and pyramid) were designed. The feasibility and effectiveness of the proposed method were verified by comparing the efficiency and accuracy of three models through manual teaching and task-level planning.     

低渗透油藏地质工程一体化三维平台的设计与实现

针对低渗透油藏开发中遇到的不同专业的三维建模、数值模拟软件分析成果格式不统一,难以综合分析利用的问题,应用三维可视化技术设计并开发了一种可以兼容多种格式的三维平台,实现了对地质模型、地应力分布模型、人工裂缝模拟结果的综合展示,并在此基础上提供了非规则井网布井功能,为低渗透油藏地质工程一体化开发提供了一种有效的分析工具。