用消光系数比表征火灾烟雾的分类特征

提出了一种表征火灾烟雾分类特征的方法,采用两个已知波长的消光系数的比值表征火灾烟雾的本质特征.研究表明:两个已知波长的消光系数比仅与烟雾粒子群的粒径分布、平均粒径和折射率有关,排除了烟雾粒子浓度的影响,通过对火灾烟雾进行简单的光学测量和计算,即可得到火灾烟雾的分类特征关键词：消光系数比火灾烟雾分类特征

Characterization of the classification characteristic for fire smoke by the extinction coefficient ratio

A new method was developed in this paper to characterize the classification characteristic for fire smoke. In this method we take the ratio of extinction coefficients of two known wavelengths as the essential character of smoke. Our research indicates that this ratio is only determined by the distribution of particle dimension, the average particle size and the refractive index of the smoke, and that the ratio can avoid the influence of the smoke concentration. Thus it will be calculable after some simple optical measurements of the smoke. This method is simple, fast, accurate and ideal to characterize the classification characteristic of smoke.