Double-end single baseline transmission-type visibility meter

Abstract

The invention provides a double-end single baseline transmission-type visibility meter, and aims to provide a transmission-type visibility meter, which can reduce the optical pollution effect on the transmission-type visibility meter and semi-quantitatively measure self optical pollution situation. The goal is achieved through the following technical scheme: a first group of laser beams emitted by a first laser device orderly goes through a lens group, then is reflected by a first beam splitter prism, a lambda / 4 wave plate, a second beam splitter prism, and a triangular prism, finally the reflected laser beams enter protective glass, the light beams are divided into transmission lights and reflection lights by the protective glass; the transmission lights go through the air in a baseline gas column, then are reflected by the triangular prism and converted into lights to be detected, the lights to be detected are split by the second beam splitter prism and converted into vertical lights, the vertical lights go into a P2 power measuring system; the reflection lights go through the second beam splitter prism for a second time and are reflected into a P1 power measuring system; then a second group of laser beams emitted by a second laser device goes through the similar route as the first group of laser beams and finally enters a P4 power measuring system and a P3 power measuring system; and finally value relationship between the obtained power values and atmospheric extinction coefficient of the baseline gas column can be obtained.

Description

technical field [0001] The invention relates to a double-end single-baseline transmissive visibility measurement system which can be directly applied to measure atmospheric visibility. Background technique [0002] The transmission visibility detector is a high-efficiency portable test instrument for measuring road visibility and smoke concentration in tunnels. It has good data processing, user-friendly interface and output functions, and can provide users with the required road visibility in this area in real time. and the smoke concentration in the tunnel, as well as data storage and complete data post-processing analysis functions. At present, the main transmissive visibility instruments mainly use the transmitter and receiver in separate mode, or the transmitter and receiver are combined with a reflective mode, all of which use a single light source, single or double power measurement system, and single-ended based on corner reflectors. Transmissive visibility meter. B...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a method that can reduce the impact of optical pollution on the transmission type visibility meter, and can semi-quantitatively measure its own optical pollution, and at the same time A double-ended single-baseline transmissive visibility meter that can also monitor the misalignment of its own optical path

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