Portable visibility transmissometer

Abstract

The invention discloses a portable visibility transmissometer. An air inlet (15) or air outlet (16) communicated with an air pump (14) is formed in a closed box body (17) of the portable visibility transmissometer; a light source is a laser (1) outputting visible lights; an optical antenna located in the box body (17) comprises a light intensity detection integrating sphere (3), a collimating lens set (5), reflecting mirrors (7), a light filter (10) and a light intensity receiving integrating sphere (11) which are sequentially arranged on a light source light path, wherein the reflecting mirrors (7) are arranged at the two ends of a light path reflecting region (8), and a light intensity detector (4) and a photoelectric detector (12) are respectively arranged on the inner walls of the two integrating sphere balls; and a measurement and control component (13) is composed of a computer and a control and acquisition module which are respectively and electrically connected with the air pump (14), the laser (1), the light intensity detectors (4) and the photoelectric detectors (12). The portable visibility transmissometer is small in size, portable and easy to use and maintain and can be widely applied to accurate measurement of atmospheric visibility.

Description

technical field [0001] The invention relates to a visibility transmissometer, in particular to a portable visibility transmissometer. Background technique [0002] Atmospheric visibility is initially defined by the estimated distance of human visual observation as a meteorological parameter, which is an intuitive expression of the scattering and absorption of light by molecules and particles in the atmosphere. Visibility is defined as Meteorological Optical Range (MOR) in meteorology. At first, it was mainly based on manual observation. With the development of photoelectric technology, it has gradually evolved into automatic photoelectric measurement equipment. At present, it is the most commonly used atmospheric visibility measurement instrument in meteorological and transportation departments. It is a forward scatter visibility meter and a transmission visibility meter. The forward scatter visibility meter is designed according to the principle of light scattering, fixed ...

AI Technical Summary

Problems solved by technology

Although this atmospheric transmission type visibility meter has high measurement accuracy, it also has shortcomings. First, in order to ensure the accuracy of measurement, the installation baseline between the light transmitting antenna and the light receiving antenna must be greater than 30 meters. Some even need hundreds of meters. Such a long installation baseline not only occupies land resources, but also greatly increases the difficulty of optical path alignment. As a result, it is currently only used in airports and other places that require high visibility measurement accuracy; secondly, it cannot be moved. The transmitter and receiver of the instrument must be installed on a huge base. Once installed, it is not easy to move, so that it can only measure the visibility at a fixed point; finally, after installation or maintenance, it needs to be compensated and calibrated. Optical path alignment calibration, increasing the cost of installation and use

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