Based on laser rediffusion type atmospheric visibility testing method and testing instrument thereof

A technique for atmospheric visibility and backscattering, applied in the measurement of scattering characteristics, color/spectral characteristics, etc.

Inactive Publication Date: 2011-06-15
NAVAL UNIV OF ENG PLA
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Problems solved by technology

[0005]The receivers and transmitters of these measuring instruments are mostly distributed on both sides, requiring cooperative targets, with large volume, high cost, small measurement range, and difficult to install and carry. Convenience and many other shortcomings, it is difficult to popularize and use

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  • Based on laser rediffusion type atmospheric visibility testing method and testing instrument thereof
  • Based on laser rediffusion type atmospheric visibility testing method and testing instrument thereof
  • Based on laser rediffusion type atmospheric visibility testing method and testing instrument thereof

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[0060]The implementation of the present invention will be described in detail below in conjunction with the accompanying drawings, but they do not constitute a limitation to the present invention, and at the same time, the advantages of the present invention will become clearer and easier to understand.

[0061] The method of atmospheric visibility measurement based on laser backscattering: it includes the following steps: ① transmit and receive laser backscattering signals five times according to medium gain and high gain respectively, and sample 400 points in each received signal; ② respectively calculate Sampling the extinction coefficients between each fault each time, under the premise of eliminating the larger error points in the faults, calculate the average extinction coefficients between faults of five; ③Calculate the overall relative extinction coefficient according to the data fusion algorithm; ④Through the relative extinction Coefficient inversion to derive atmosphe...

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Abstract

The invention relates to based on laser backscattering type atmospheric visibility measuring method and apparatus. It includes the following steps: respectively transmitting and receiving laser backscattering signal for five times as middle gain and high gain, sampling 400 points in each the received signal; respectively computing each fault extinction coefficient while sampling, computing its average extinction coefficient for five sets after removing the point with big error; computing whole relative extinction coefficient by data fusion algorithm; deducing the atmospheric visibility by relative extinction coefficient inversion. The invention has the advantages of high measuring precision, little volume, light weight, wide application range, and no collaboration object.

Description

technical field [0001] The invention relates to a method for measuring atmospheric visibility based on laser backscattering, and simultaneously relates to an atmospheric visibility measuring instrument designed according to the method. The measuring instrument is mainly used for atmospheric monitoring of airports, meteorology, and harbors, as well as atmospheric visibility parameter calibration of equipment such as test sites, radar, infrared, and laser. Background technique [0002] Meteorological visibility (meteorological visibility) is a term defined by the World Meteorological Organization (WMO): People with normal eyesight can see and identify black objects of appropriate size from the background of the sky under the prevailing weather conditions during the day. The maximum distance; at night, it refers to the maximum distance at which the target can be identified under the assumption that the brightness is the same as that of the day. It can be seen that meteorologic...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/53G01N21/27
Inventor 康圣王江安宗思光蒋冰莉
Owner NAVAL UNIV OF ENG PLA
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