非色散红外CO_2飞机火警探测技术研究

Research on the technology of non-dispersive infrared CO_2 aircraft fire detection

提出了基于非色散红外吸收原理(NDIR)实时监测环境中CO2气体浓度变化进行火警探测的方法。根据高空大气环境的特殊性,探讨了基于NDIR的CO2气体探测技术应用于飞机上所面临的低温低压难题。进行了基于NDIR的红外CO2飞机火警探测器的两种结构设计,提出了基于CO2气体浓度监测的红外CO2飞机火警探测器的主要参数要求,研究了基于CO2浓度变化速率与变化值的火灾报警算法。

In this work ,the fire detection has been realized through accurate monitoring of CO2 concentration in the environment based on NDIR（Non‐Dispersion Infrared） .Considering the particularity of upper environmental condition ,NDIR is used to resolve the challenge of temperature and pressure in aircraft fire detection .The two kinds of aircraft fire detector have been designed based on NDIR , and the main parameters of aircraft fire detector have been presented . With the calculated concentration of CO2 ,an alarm algorithm for aircraft fire detector is presented .