Research On Event-driven Dynamic Scenario Construction Method For Highway Emergency Security

With the continuous progress of science and technology,the rapid development of highway construction at the same time,highway emergencies have also brought a greater negative impact on society.The organization and expression of data related to emergency events and emergency response is gradually becoming an important basis for road transport emergency security work.The 3D linear data has the characteristics of multi-source heterogeneity and band distribution,so how to track the evolution of highway emergencies scientifically,and realize the rapid construction and accurate dynamic expression of 3D linear sceces,so as to assist emergency rescue decision making is a pressing problem at present.Therefore,this paper focuses on the construction of an event-centered data organization and dynamic representation model for the emergency support of highway transportation emergencies.In response to the above problems,this paper proposes an event-driven 3D line dynamic scene construction method based on event-driven scenes,which realizes the organization and dynamic expression of highway emergency scenario information.Based on the linear reference model,scene construction and event-driven theory,this study proposes an event-driven model under the linear reference system,and then realizes the construction of 3D linear scenes driven by the event model.Firstly,the basic event model is established by combining the characteristics of dynamic development of highway emergencies and event information with multiple sources of heterogeneity,timeliness and zonal distribution of the event information,and then the events are classified and the event coding rules under the linear reference system are designed according to the types and logical relationships of events in the linear scenario.Secondly,we establish a unified mapping relationship between events and objects,so that the changes of events drive the changes of model attributes in the linear scenario,and design a linear scene construction rule based on the event-driven model.Finally,the application practice of highway dynamic scene construction is carried out,and the 3D linear scene construction based on event-driven model is realized.The smoothness of scene rendering is significantly improved compared with the traditional method,and the feasibility of efficient 3D linear scene construction based on event-driven model is verified.The main research contents and results of this paper are summarized as follows:(1)An event-driven model for 3D linear scenes is constructed.The event table model is designed for multi-source high-dimensional heterogeneous emergency data,combined with linear scene characteristics,and then the event-driven model in linear scenes is established to provide technical support for the construction of 3D linear scenes.(2)The event-driven 3D linear scene dispatching rules are developed.The dynamic feature description scheme of event data is proposed to describe the scheduling rules of dynamic scenes of highway emergency security,complete the dynamic expression of 3D linear scenes,and provide technical support for highway emergency security.(3)By developing the emergency information management system of “Tai Jiu”Expressway,it verified that the event-driven 3D dynamic scene construction method of sexual road can efficiently organize the highway emergency data and make accurate dynamic expression for the 3D linear scene,and realize the rapid construction of highway emergency security scene.