Research On Campus Fire Drill And Evaluation System Based On Sense Of Body And Virtual Technology

With the rapid development of China social economy and information technology industry,the frequency of fire is higher and higher,and the causes of fire are more and more complex.For the general daily fire drill,in the drill,there will be some non predictive or unexpected fire training accidents from time to time.The cost of this kind of fire fighting training is relatively large,including the form and cost,which is generally not reusable.Virtual reality technology is a technology that makes use of the existing computer resources to make these resources behave as one or more integrated environments,so as to provide a technology that can access all the resources.Virtual technology can simulate a new similar virtual space according to the actual surrounding environment.The virtual environment can not only bring a variety of sensory stimulation to users,but also interact with the environment in real time through virtual devices,giving users a real and natural immersive feeling.This research develops a campus fire training system based on unity3d engine and somatosensory devices such as lighthouse and HTC Vive.The system has complete functions,including three basic scenes:laboratory scene,dormitory scene and conference room scene.It can switch and carry out fire drills arbitrarily in different scenes,including theoretical knowledge assessment of fire,The system can reduce the cost of training,improve the enthusiasm of participants and training interest,and has strong practical significance to improve people's safety vigilance.In the simulator,the visualization of fire dynamic data and volume rendering based on FDS and FED is further optimized,which can be effectively and quickly applied to virtual fire control,At the same time,a smoke hazard assessment model based on FDS and fed is established to assess the IHD value of different paths,which represents the safety of different paths and can be used for evacuation or rescue in virtual training.The research shows the accuracy and effectiveness of smoke assessment based on FDS and fed;In the design of path search and data processing,an improved bidirectional A~*algorithm is proposed.The algorithm improves the time complexity and space complexity,and has good versatility and high search efficiency.It plays a vital role in the path search of the system.After investigation and verification,the conclusion is that the above two algorithms are suitable for the system,which has a certain reference significance.Experiments based on the above algorithm show that the system can enable users to interact with the virtual scene on the large screen in the virtual environment.Through the process of human-computer interaction,the fire scene is more realistic.Users can walk freely in the real space to observe the virtual image,making the impression more natural and real.