基于复合热烟传感信息的受限空间火源定位方法

Fire source location method in limited space based on compound hot smoke sensing information

火源点定位对实现针对性灭火、成因鉴定及人员疏散具有重要意义。为解决室内受限空间火源精确定位困难的问题,根据火灾初期热烟气流的流动特点,推导出利用火灾热烟气流扩散模型的受限空间火源定位方法。将传感单元阵列所采集热烟传感信息进行相对变率关联度分析,以确定传感器之间的信号时延。通过几何关系确定传感器单元与火源点之间的方位角,再利用角度定位原理得到一次火源点定位结果。最后根据利用不同时间段内信息得到的火源定位结果,基于动态聚类思想选取定位估计区域,将区域中心点作为火源综合定位结果输出。仿真测试分析显示火源定位精度较好,验证所提方法的可行性。

Fire source location is important for the realization of targeted fire extinguishing,cause identification and personnel evacuation.To solve the problem that it is difficult to accurately locate the fire source in limited space,based on the flow characteristics of the hot smoke air flow at the beginning of the fire,a method for locating the fire source in limited space is deduced.The relative variability correlation analysis is performed on the hot smoke sensing information to determine the delay signal between the sensors.Through the position relationship,the azimuth angle between the sensor unit and the fire source point is calculated to get a fire source point positioning result.Using the results from the information in different time periods,the location estimation area is obtained according to the idea of dynamic clustering,and the center point of area is the comprehensive output result of fire source location.Simulation testing analysis shows that the fire source location accuracy is better,verifying the feasibility of the proposed method.