一种火场多参量在线监测系统的设计与实现  

Design and Implementation of a in-situ Detection System for Multi-parameters of Fire-area

作　　者：赵建华[1] 赵崇文[1] 魏周君[1] 

机构地区：[1]中国科学技术大学火灾科学国家重点实验室,合肥230027

出　　处：《火灾科学》2008年第1期54-57,共4页Fire Safety Science

基　　金：安徽省自然科学基金资助项目(070415221)

摘　　要：火场氧浓度降低、大量烟气遮挡视线和吸入毒性气体是造成火灾中人员无法逃生而窒息死亡的三大主要因素。基于波长调制光谱和谐波探测技术,利用光源调制实现了气体浓度的谐波检测;采用激光烟浓度检测方法,测得减光系数,以表征烟雾浓度。通过合理高效的系统光路和硬件设计,采用分时复用方法,大大缩短了检测周期,每2.5秒便可完成一次对火场多参量的检测,实现了同时对火场中多参量(包括火灾产物中O2、CO、CO2、HCN的浓度和烟雾浓度)的在线实时监测。Reducing of oxygen concentration, smoke that obscured vision and toxic gas inhalation are three major factors that cause people in fire unable to escape and result in the suffocation deaths. Based on the wavelength modulation spectroscopy and harmonic detection technology, detection of the gas concentration is achieved by taking use of modulated light source, and smoke concentration measured by obscuration coefficient is detected by laser detection method. Through reasonable and efficient optical system and hardware design and time division multiplexing method, the testing cycle is greatly shorten, and the detecting of multi-parameters of fire-area is able to be completed in every 2. 5 seconds. So the in-situ real-time monitoring of the multi-parameters （including concentration of O2, CO, CO2, HCN and smoke of fire products） of fire-area is achieved.

关 键 词：火场多参量 波长调制光谱 谐波探测 在线监测 

分 类 号：TN247[电子电信—物理电子学] X924.2[环境科学与工程—安全科学]