The Research Of Emergency Evacuation In Building’s Indoor Environment

With the development of society,one after another large-scale building appears in the world,some are places for people to entertainment,and some are places for them to work.For the places where people gathered,if emergency happens,there are two main reasons cause the casualties,one is the indoor environment’s obturation,another is the lack of good evacuation plans and guidance,this could cause the people flocked,and the more serious situation is the stampede and casualties.Recently,domestic and foreign researchers have some research on the emergency evacuation,and made a lot of models of evacuation,but most of these models can only be simulated on computer rather than applied in reality,so in this paper,a further research is made on the basis of these models.The main research of this paper is the method of modeling the inner building space,the personnel positioning ways in buildings and the evacuation algorithm.For the indoor environment of a building,the indoor structure can be modeled to be a topology network G(N,A)that only composed of points and arcs,and the wireless sensor network(WSN)is introduced into the model for the environment monitoring.And for the indoor personnel positioning,we analyzed the pros and cons of variety ways of positioning,and a new algorithm of counting steps and error compensation in PDR is presented in this paper.Then with the study of the classical path search algorithms,we presented a new emergency evacuation algorithm based on wireless sensors which will consider the environmental factors and the density,reasonable distribution of the evacuation people is made in order to avoid the overcrowding,and through simulation experiments,certify the effectiveness of the algorithm.At last in this article,we designed the emergency evacuation system for the indoor environment.This system includes server-side system and the mobile terminal system,the system on server combined the environment information of WSN and the location information of positioning system.With the communications between the systems on server and terminals,an overall evacuation plan can be made with the information,and this can made the evacuation process in order and fast.With the emergency system implanted into the mobile terminals(such as mobile phones),the emergency evacuation technology can be widely used in reality.