Visibility measurement using multi-angle forward scattering by liquid droplets

被引：4
作者：
Li, Chengwei [1 ]
Peng, Peng [1 ]
机构：
[1] Harbin Inst Technol, Sch Elect Engn & Automat, Harbin 150001, Peoples R China
来源：
MEASUREMENT SCIENCE AND TECHNOLOGY | 2012年 / 23卷 / 10期
关键词：
liquid droplets; forward scattering; extinction coefficient; visibility measurement; LIGHT-SCATTERING; FORWARD-SCATTERING; OPTICAL-PROPERTIES; PARTICLES; AEROSOLS; SPECTROSCOPY; SIZE; SPECTRA; MODELS; LIDAR;
D O I：
10.1088/0957-0233/23/10/105802
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A multi-angle forward scattering method is presented, which can be used to detect the extinction coefficient of liquid droplets in atmosphere visibility measurement. The wavelength of LED in the transmitter is 850 nm, and the forward scattering signals are collected by three receivers which are arranged at angles of 20 degrees, 35 degrees and 50 degrees, respectively. Atmosphere visibility is measured by the receiver which is arranged at 35 degrees angle. It can determine the type of weather by the ratio between scattering phase function P(20 degrees) and P(50 degrees), and also find the different ranges of these ratios in different weather. Compared to other visibility meters, the meter proposed not only measures the visibility accurately, but also distinguishes weather types such as fog, haze and mist.
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页数：7
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