All-weather long-distance transmission type atmospheric visibility meter

Abstract

The invention discloses an all-weather long-distance transmission type atmospheric visibility meter which comprises an optical transmitter and an optical receiver, wherein the transmitter comprises a first sealing cavity and a first housing; an LED light source and a modulation light driver are arranged in the first sealing cavity; the LED light source transmits square wave radiation with fixed frequency under the action of the modulation light driver; the receiver comprises a second sealing cavity and a second housing; a detector and a detector amplification circuit connected with the detector are arranged in the second sealing cavity; the detector is used for receiving the light radiation transmitted by the transmitter; the detector amplification circuit receives a synchronous signal, and processes a signal converted by the detector on the basis of the synchronous signal, so as to remove the background radiation. The all-weather long-distance transmission type atmospheric visibility meter utilizes the characteristic that the background radiation is mostly DC or low-frequency radiation to modulate the radiation signal with fixed frequency transmitted by the LED light source, and uses a method that the receiving end only receives the radiation signal with the fixed frequency to shield the background radiation.

Description

technical field [0001] The invention relates to a measuring device for meteorological optical sight distance in the field of meteorology, in particular to an all-weather long-distance transmission atmospheric visibility meter. Background technique [0002] Meteorological optical line-of-sight measurement device is mainly used for the maximum optical line-of-sight under the current meteorological conditions in fields such as airstrips, shipping, and land transportation. It is one of the important parameters of meteorological parameters in these fields. [0003] Meteorological optical line-of-sight measurement (observation) usually adopts the following methods: [0004] 1. Visual observation (subjective observation): Refers to manual observation. The results of visual observation will vary greatly due to different observation conditions, such as the height of the observation point, the observation range, and the eyesight, training and psychological state of the observer. [0...

AI Technical Summary

Problems solved by technology

However, compared with the diffuse type, the technology is more difficult and the cost is relatively high, so it is suitable for use in scenes that require higher meteorological conditions, such as airports, sea surfaces, ports, etc.

[0007] At present, the acquisition of meteorological optical line-of-sight for airports, sea surfaces, ports, etc. is mainly based on visual observation, which is neither scientific nor accurate.

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