室内空气中颗粒状污染物的PTV测量  

Measurement of Velocities and Concentration Distribution of Inhalable Particles in Indoor Air Based on Image Processing and PTV Technique

作　　者：刘双科[1] 王建永[1] 杨彩青[1] 王建飞[1] 

机构地区：[1]北京科技大学热能工程系,北京100083

出　　处：《中国环境监测》2008年第1期46-50,共5页Environmental Monitoring in China

摘　　要：针对室内空气中颗粒状污染物流动特性的测量搭建了PTV测量系统,该系统由白光照明、CCD摄像头采集图像及四轨迹像点匹配算法软件构成。测量结果表明,该PTV系统具有测量室内空气中可吸入颗粒扩散与流动的速度分布、浓度分布等特性。A simple measurement system was developed using CCD camera, image processing and PTV （PTV： Particle Tracking Velocimetry） techniques to measure the velocities and concentration distribution of inhalable particle in indoor air. The photographic system included illuminations of white light and CCD camera （30fps） could capture successive particle images. Based on Four- Consecutive- Time - Step Method, the software system of PTV was improved image point matching algorithms for motion particles, various image 7 processing algorithms. The results show that the inhalale particles can image for illuminate of white light and the system was successful used to effectively measure velocities and concentration distribution of inhalable particle in indoor air.

关 键 词：室内空气 可吸入颗粒物 PTV技术 图像处理 

分 类 号：X831[环境科学与工程—环境工程]