光学雨滴谱测量仪  

Optical measurement for raindrop parameters

作　　者：王文瀚[1] 凌进中[1] 王力田[1] 黄元申[1] 张大伟[1] 

机构地区：[1]上海理工大学光电信息与计算机工程学院,上海200093

出　　处：《光学技术》2013年第3期237-240,共4页Optical Technique

基　　金：国家自然科学基金(60908021);国家科技支撑计划(2011BAF02804);国家重大科学仪器设备开发专项(2011YQ15004);上海市重点学科项目第三期(S30502);上海市研发公共服务平台(11DZ2290300)

摘　　要：光学雨滴谱测量仪能够实时监测雨滴直径分布、雨滴降落速度等气象参数,可应用于气象研究、环境监测、农业安全预警等领域。采用红外LED光源和线阵CCD,搭建了雨滴谱测量光路,并用水滴代替雨滴,演示测量了通过采样空间的水滴的直径和速度,验证了雨滴参数光学测量的可行性。实验中发现当较大雨滴紧贴CCD窗口通过采样空间时,液体透镜效应十分明显,CCD对应区域的光强增强,与通常的遮挡现象正好相反,因此在后续的程序处理中需妥善处理这类异常信号。Raindrop spectrograph could widely applied in meteorology research, environmental monitoring and agri- culture safety forecast for its function of rain parameters measurement, such as raindrop diameter and raindrop velocity. To verify the feasibility of optical raindrop measurement, an infrared LED and linear CCD is used to setup an optical measurement scheme for raindrop parameters. Substituting for raindrop, water drop is used to demonstrate the optical measurement for raindrop diameter and raindrop velocity. Differently, when the water drops extremely close to the CCD photosensitive surface, the detected signal is contrary to the normal result, which is caused by convergent effect of liquid lens. So the abnormal signal should be treated specially avoiding the measurement errors.

关 键 词：光学测量 雨滴谱 光电探测 雨滴直径 线阵CCD 红外LED 

分 类 号：TN215[电子电信—物理电子学]