一种火场多参量在线监测系统的设计与实现

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.

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

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 hard...