室内空气中污染物的检测技术

Detecting Technology for particulate contamination in Indoor Air

室内环境空气污染对人体健康影响很大。文中指出了影响人体健康的致病因子，分析了单个微粒的光通量和粒径之间的关系。鉴于单个颗粒的散射光信号很弱，本文提出一种方法，把激光器的内腔作为颗粒注入区，利用激光器的内腔功率谱密度远大于腔外功率密度的特点，结合先进的激光散射理论，对空气中的颗粒进行检测。实践证明，该方法对较小粒径的颗粒检测非常有效。

Indoor air pollution has much influnence on people's health. The paper pointed out the pathogeny which affect people's health, analyzed the relationship between luminous flux and particle size for single particle. Since the laser scattering signal was very weak, we proposed a new method. The open-cavity of laser device was regarded as particles injecting area for the power density inside laser device was much larger than that of outside. And combining with the advanced light scattering theory, we detected the particles. The method was verified by experiment, and the results showed it was very effective for detecting small particles.