北京航空航天大学学报

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基于CO2浓度监测的飞机火警探测方法

赵建华,方丽丽   

  1. 中国科学技术大学火灾国家重点实验室
  • 收稿日期:2015-01-29 修回日期:2015-06-12 出版日期:2015-06-29 发布日期:2015-06-29
  • 通讯作者: 赵建华

Aircraft fire detection method based on the CO2 concentration monitoring

  • Received:2015-01-29 Revised:2015-06-12 Online:2015-06-29 Published:2015-06-29

摘要: 本文分析了发生火灾时气态燃烧产物的生成规律,提出了以CO2气体为火警探测参量,通过准确监测环境中CO2气体浓度的变化,进行飞机火警探测的方法;根据飞机飞行所处环境条件的特殊性,研究了基于非色散红外吸收原理的CO2气体浓度监测的飞机火警探测方法应用于飞机上所面临的温度补偿难题;根据飞机火警探测器测量电压与环境温度、参比电压之间的关系,采用偏最小二乘法建立飞机火警探测器温度补偿模型;根据飞机火警探测器测量电压与CO2气体浓度之间的关系,采用偏最小二乘法建立CO2气体浓度计算模型;研究了基于CO2气体浓度监测的报警算法,为飞机火警探测提供了一种新的方法。

关键词: 非色散红外, 偏最小二乘法, CO2气体浓度监测, 飞机火警探测器, 温度补偿模型, 浓度计算模型, 自适应报警算法

Abstract: In this paper, we analyze production rule of gaseous combustion products in fires, and put forward CO2 as parameter of fire detection. Through accurate monitoring of CO2 concentration in the environment, the aircraft fire detection has been realized. Considering the particularity of environmental condition on aircraft, NDIR(Non-Dispersion Infrared)is used to resolve the challenge of temperature compensation in aircraft fire detection. According to the relationship among the measured voltage of aircraft fire detector, environment temperature and reference voltage, temperature compensating model for aircraft fire detector is established based on partial least squares (PLS) approach. And model for CO2 concentration calculating is built by using partial least squares (PLS) method, which is based on correlation between measured voltage of aircraft fire detector and CO2 concentration. With the calculated concentration of CO2, an alarm algorithm for aircraft fire detector is presented then, which provides a new fire detection method for aircraft.

Key words: Non-Dispersion Infrared, partial least squares, CO2 concentration monitoring, aircraft fire detector, temperature compensating model, concentration calculating model, adaptive alarm algorithm

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