Design And Realization Of Real-time 3D Visualization System For Offshore Wind Power Plant

3D(Three Dimensions)scene reconstruction is an important research direction in computer vision.However,static 3D reconstruction can not well visualize the movement of windmills,and conventional dynamic 3D reconstruction requires high outdoor work and cost.most of the reconstruction steps and work are carried out through specific live UAV video streams,or satellite images,depth images,or point cloud data obtained by Kinect,Li DAR(Laser Detection and Measurement),etc..It includes extracting the feature points from the multi-view image,matching the feature points in the multi-view,constructing the basic matrix and so on to restore the camera parameters,so as to get the three-dimensional structure of the scene and motion capture.The UAV carries on the real-time 3D reconstruction to the scene photo or the video stream or the VR technology to carry on the 3D scene construction,this method is only suitable for the daytime,the night dynamic scene establishment depends on the infrared night vision to achieve the effect is not good.Therefore,it is of great research value and significance to carry out dynamic 3D reconstruction of offshore wind power stations with the least cost in order to achieve good visual effect.Dynamic object or scene simulation design has developed from traditional two-dimensional reconstruction to semi-three-dimensional reconstruction,and then to real three-dimensional reconstruction,real-time 3D visualization system can present more details and scenarios.The dynamic visual simulation system of wind farm is designed.the system takes data fusion as the core,which is not affected by day,night and weather,but also has the real-time performance of dynamic 3D reconstruction.The static 3D reconstruction of the scene is realized by establishing the geographic 3D model and the 3D model of the wind power station,and the dynamic restoration and reconstruction of the scene is realized by dynamically driving the details such as power station information and weather information to the system.Through the effective simulation of the system,the design requirements of the visualization system are achieved.The main work of this paper are as follows:(1)Scene restoration.The collection and processing of real-time data in the visualization system is completed,and Arc GIS is used to convert the grayscale image of the real terrain to obtain a geographic model dataset.According to the geographic dataset,the land model is reconstructed in the visualization system.Combining the modeling technology of geometric model and image-based modeling and rendering technology,the windmill model and ship model are constructed in 3DMax software.Integrate the scene according to the coordinate information,and use scene rendering and various reconstruction techniques to realize the visual details,so as to construct a complete dynamic three-dimensional scene of the wind power plant.(2)Data driven.The multi-category data collected in real time by the wind power plant is integrated and stored,and Photon Socket is built to realize the information data transmission framework from the server to the client terminal.The encoding of the ship information identification system is preprocessed,and the ship is driven and attitude simulated according to the encoded information.Aiming at the data distortion or failure of the driving windmill model,a method is proposed to integrate the real motion parameters of the windmill,the wind power station meteorological data,the weather forecast meteorological data,and the short-term forecast meteorological data,and the windmill is driven according to the priority of these data.Among them,the meteorological data is processed by wind speed and direction conversion,and the historical meteorological data is modeled to obtain short-term forecast wind speed and wind direction.(3)Functional design and system release.Using Unity3 D software,the visualization of the wind farm is secondary developed,and the login verification is designed for the visualization system,and functions such as collision detection,weather forecast,rain and snow system,and two-dimensional dynamic map are also designed.The system functions also include rich interactive design,mainly adding a 2D minimap and custom zooming,keyboard and mouse control of the roaming camera and perspective switching of the camera,interactive information prompts for 3D objects such as ships and windmills,weather information panel display,Interactive function design such as scene switching,rain and snow particle system playback control.Publish the visualization system as an application program,and configure the server to apply it to the cloud server.The user’s PC can execute the application program and browse the wind power station scene by logging in to the visualization system.The construction of the real-time visualization system of offshore wind power plant in this paper is mainly divided into three steps,namely,scene restoration,dynamic drive and function interaction.in the process of improving the module,a variety of modeling techniques,data processing technologies and rendering optimization technologies are used to restore the virtual scene similar to the wind farm area to a great extent.