摘要
利用气体滤波光声技术和光散射原理测量早期火灾烟气中CO和烟颗粒浓度的方法和系统。分别采用两个气体滤波光声腔的作为CO测量光声腔和烟雾参比光声腔,在光源和光声腔之间建立火灾烟气的测量路径,记录其进入该路径后光声信号强度的变化,通过两个滤波波长上CO吸收和烟颗粒消光的相关处理,同时得到CO浓度和烟雾浓度。
This paper presents a photoacoustic method to meter CO and smoke concentration simultaneously in early fire situation. Fire products, including gaseous components and smoke particles, were metered in the measuring path between the light source and the photoacoustic cells. Based on gas filter technology and particle scattering theory, a CO gas cell and a reference gas cell were used together to meter the light attenuation caused by CO absorption and smoke particles extinction at two different wave lengths. When the fire products entered the measuring path, CO concentration and smoke optical density were obtained by processing the photoacoustic signal attenuation of the two cells.
出处
《传感技术学报》
EI
CAS
CSCD
北大核心
2006年第3期597-601,共5页
Chinese Journal of Sensors and Actuators
基金
国家重点基础研究专项经费资助(2001CB409600)
关键词
光声技术
火灾产物
CO
粒子散射
photoacoustic
fire products
CO
particle scattering
