Three-dimensional Complex Scene Perception And Visualization Technology In Degraded Visual Environment

With the innovation of science and technology in the aviation field,unmanned helicopters are playing a more and more important role in both military and civilian fields.Although unmanned helicopters are widely used,unmanned helicopters need to face an all-weather,complex climate environment,which also makes frequent flight accidents.How to improve the situation awareness and understanding ability of UAV operators,ensure the timeliness and correctness of operations,and ensure flight safety has become a hot topic.This paper firstly introduces the degraded visual environment problems faced by unmanned helicopters during the mission process,and then analyzes the key technologies involved in the 3D complex scene perception and visualization of the degraded visual environment.the multi-source heterogeneous detector sensing and imaging process is realized by enhanced synthetic vision technology.The dynamic fusion display processing method of virtual military elements and 3D scenes is studied.Then,the multi-channel,multi-view and multi-enhancement of enhanced synthetic vision are proposed.Finally,A dynamic three-dimensional enhanced synthetic vision and visual comprehensive demonstration system is constructed.This paper has mainly completed the following aspects: 1.Analyzed The key technologies of 3D scene perception and visualization technology in degraded visual environment,proposed the technical lines,and introduced 3D scene database modeling technology and virtual instrument modeling technology.2.Analyzed and Studied the three-dimensional complex scene perception of the degraded visual environment.By using the degraded visual environment modeling technology,the simulation of rain,snow,fog,sandstorm,snow and dark night environment is realized.Combined with the research results at home and abroad,enhanced synthetic vision technology is used to realize the multi-source heterogeneous sensor sensing and imaging simulation,including FLIR,LIDAR and MMWR.3.Studied scene perception and visualization technology.The multi-source heterogeneous sensor fusion sensing technology is used to realize the multi-source heterogeneous sensor fusion sensing processing,showing the effect of fusion perception.The virtual military elements such as the primary flight display PFD,the head-up display HUD,the three-dimensional landing landmark,and the safe flight channel are designed,which are dynamically associated with 3D scenes and displayed in real time.Four kinds of obstacle highlight methods,including bounding box,wire frame display,coloring processing and numeric marking,are designed and implemented to detect and identify obstacles.By using terrain warning and warning technology,three different dangerous terrain warning displays are realized.4.Designed and implemented a dynamic 3D enhanced synthetic vision and visual integrated demonstration system.Introduced multi-channel,multi-field,multi-mode display processing technology,software design and overall implementation.Detailed description of each function module is given,including module functions,interface layout and operation effects,It shows the perception of 3D complex scenes in the degraded visual environment,greatly improves the situation awareness ability of UAV operators,and effectively ensures safe flight.