双波长气溶胶粒径传感方法及其火灾烟雾探测器

发布时间：2018-04-25 11:32

本文选题：烟雾探测 + 气溶胶粒径　；参考：《火灾科学》2016年04期

【摘要】：提出了双波长光散射气溶胶粒径传感方法,设计实现了采用该方法的双波长火灾烟雾探测器。使用短波长和长波长的双波长光源,通过计算其光功率比值,利用其与中值粒径的关系函数获得气溶胶粒径,并根据不同粒径下的气溶胶浓度分别给出大小不同粒径的火灾烟雾或干扰气溶胶提示。因而,不仅可以有效区分大小不同粒径的火灾烟雾气溶胶,以正确探测火灾,而且能够识别微米级的大粒径干扰粒子,降低火灾误报率,可以应用于飞机等航空器空中密闭的特殊环境。
[Abstract]:A dual wavelength light scattering aerosol particle size sensing method is proposed and a dual wavelength fire smoke detector using this method is designed and implemented. The aerosol particle size is obtained by calculating the ratio of optical power and the relationship between the light power ratio and the median particle size by using the dual wavelength light source with short wavelength and long wavelength. According to the aerosol concentration under different particle size, fire smoke with different size or disturbance aerosol are given. Therefore, not only can fire smoke aerosols of different sizes be effectively distinguished in order to detect fire correctly, but also large particle size interference particles of micron size can be identified, and the false alarm rate of fire can be reduced. Can be applied to aircraft and other aircraft airtight special environment.
【作者单位】：华中科技大学电子信息与通信学院;
【分类号】：X932;X924.3

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