动力舱红外成像火情探测系统  

Fire detecting system of engine bay based on infrared imaging technology

作　　者：王利军 关俊娟 秦智勇 陈建 姬鹏远 Wang Lijun;Guan Junjuan;Qin Zhiyong;Chen Jian;Ji Pengyuan(63963 Unit of PLA,Beijing 100072,China;XX Department of Army,Beijing 100072,China;Sichuan Tianwei Electronic Co.Ltd,Chengdu 610200,China)

机构地区：[1]中国人民解放军63963部队,北京100072 [2]陆军某部,北京100072 [3]四川天微电子股份有限公司,四川成都610200

出　　处：《红外与激光工程》2022年第5期145-150,共6页Infrared and Laser Engineering

摘　　要：火情探测是特种车辆灭火抑爆系统的重要组成部分,火情探测能力的高低直接影响车辆及其内部乘载员的安全。现有动力舱火情探测系统主要利用温度传感器和非成像光学火情探测器,但由于动力舱结构复杂,环境恶劣,基于温度传感器的动力舱火情探测系统由于无法实现舱内空间全覆盖安装,因此容易产生火灾漏报现象,而非成像光学火情探测器由于灵敏度过高容易产生火情误报现象,动力舱应用甚少。与现有动力舱火情探测系统不同,设计了红外成像火情探测系统,采用测温热像装置和测温显控装置,能够实现对动力舱一定目标空间内的实时温度监控,通过温度识别算法和设定预警温度阈值、报警温度阈值,实现了高温预警功能和火灾报警功能。利用标准火焰测试平台对探测系统进行了实验测试,结果表明红外成像火情探测系统的火灾响应时间小于5 s,满足国军标的要求。该系统将火灾发生后的报警提升到火灾发生前预警,能够有效避免动力舱火灾漏报问题,保护特种车辆内部人员安全。Fire detecting system is a important part of the fire extinguishing and the explosion suppression equipments which can be used to protect the safety of people when the fire broke out in special vehicles.The systems based on temperature sensor and non-imaging photo-detector which are usually used now have some problems because the space structure of engine bay is complex.For example,the system based on temperature sensor often fails to find the fire because the distance between senor and fire is too large,and it is impossible for full coverage of the Engine Bay space.Also,the fire detecting system based on linear or spot heat detector often fail to detect the fire in time used for engine bay overheat protection.And the system based on non-imaging photo-detector often fails to alarm the fire because the sensitivity is too high.So the fire and explosion seriously threaten the safety of armored vehicles and the people in them.To solve the problem,a detecting system based on infrared imaging technology is designed.A infrared-imaging detector is employed.A display and control unit is used to monitor the engine bay temperature.The temperature threshold can be preset for early warning of high temperature and fire alarm.Engine bay overheat protection system based on infrared imaging technology is tested by normal blaze experimental platform which is made up of a normal brazier and a exhaust equipment.Experiment results show that the system can generate alarm signals when the temperature in engine bay space is higher than the temperature threshold.And fire response time based on this infrared imaging system is less than5 s,which can meet the requirement of relevant National Military Standards of China.As a result,the system can be used for fire early warning,and can meet the requirements for engine bay unreported fire.This system can be used to protect armored vehicles and safety of people in them.

关 键 词：火情探测 红外成像 动力舱 高温预警 火灾报警 

分 类 号：TN219[电子电信—物理电子学]