基于传感器十字交叉式排布的飞机货舱早期火源定位研究

Early fire source location in aircraft cargo holdbased on crossover arrangement of sensors

提出一种早期火灾火源定位方法,用于飞机在高空航行时低温低压状态下的货舱火源定位情形。该方法基于传感器十字交叉式排布,利用传感器检测到烟雾信号的延迟间隔,计算烟雾传播位移差,溯源定位火源位置。可在火灾发生早期阶段,精确定位火源,有效减少灭火剂的投放量,减轻灭火剂残留物对大气环境的损害,促进绿色民航建设。为验证定位算法的准确性,采用PyroSim火灾模拟软件按1∶1建立了A330-300后下货舱模型,随机选取20个火源点,在低温低压状态下火源定位平均相对误差为2.44%。结果表明,该定位方法定位精准度高,适用于飞机货舱火源探测,具有良好的可行性。

This paper presents an early fire source location meth-od for cargo hold fire location under low temperature and low pressure during high altitude flight.The method is based on the cross arrangement of sensors,the delay interval of smoke signal detected by sensors is used to calculate the displacement differ-ence of smoke propagation,and the fire source location is traced.It can accurately locate the fire source in the early stage of fire,effectively reduce the amount of fire extinguishing agent,reduce the damage of fire extinguishing agent residue to the atmosphere environment,and promote the construction of green civil aviation.In order to verify the accuracy of the posi-tioning algorithm,A330-300 rear lower cargo compartment model is 1∶1 established in PyroSim fire simulation software,and 20 fire source points are randomly selected.The average relative error of fire source location under low temperature and low pressure is 2.44%.The results show that this positioning method has high positioning accuracy and is suitable for fire source detection in aircraft cargo hold.