室内空气中颗粒状污染物的计数技术

室内环境空气污染对人体健康影响很大。文中指出影响人体健康的致病因子，并详细分析先进的光散射理论，在此基础上建立异轴采光数学模型，分析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，把光辉器的内腔（开放腔）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计数的粒径分档。实践证明，该方法对较小粒径的颗粒检测

COUNT TECHNOLOGY FOR PARTICULATE CONTAMINATION IN INDOOR AIR

Indoor air pollution has much influnence on people′s health.The paper points out the pathogeny which affects people′s health,analyzes the advanced light scattering theory in detail,builts the mathematics model for on-axis lighting on the basis of the theory,and studies the relationship between luminous flux and particle size of single particle.Since the laser scattering signal is very weak,we propose a new method.The open-cavity of laser device is regarded as particles injecting area,the power density inside laser device is much larger than that of outside.And combining with the advanced light scattering theory,the particles are counted and classified.The results show that the method is very effective for detecting small particles.