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A Calculation Method for LiDAR Detection of Atmospheric Vertical Visibility

A technology of lidar and calculation method, applied in measurement devices, climate sustainability, measurement of scattering characteristics, etc., to achieve the effect of broadening the scope of application and simplifying the algorithm

Active Publication Date: 2019-05-10
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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Problems solved by technology

However, its application in visibility measurement is currently aimed at horizontal meteorological visibility, and there is no particularly effective calculation method for vertical visibility measurement

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  • A Calculation Method for LiDAR Detection of Atmospheric Vertical Visibility
  • A Calculation Method for LiDAR Detection of Atmospheric Vertical Visibility
  • A Calculation Method for LiDAR Detection of Atmospheric Vertical Visibility

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Embodiment Construction

[0024] In order to more clearly illustrate the specific implementation of the present invention or the technical solutions in the prior art, the following will briefly introduce the accompanying drawings that need to be used in the specific implementation or description of the prior art. Obviously, the accompanying drawings in the following description The drawings show some implementations of the present invention, and those skilled in the art can obtain other drawings based on these drawings without any creative work.

[0025] Such as figure 1 As shown, the present invention provides a kind of lidar to detect the computing method of atmospheric vertical visibility, comprises the following steps:

[0026] (1) Obtain the original echo signal measured vertically by the laser radar and judge whether there is a cloud in the original echo signal. Since the backscattering cross section of the cloud is much larger than that of the aerosol, when the laser transmits in the atmosphere ...

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Abstract

The invention discloses a calculation method of atmosphere vertical visibility via laser radar detection. The method comprises the following steps: obtaining an original echo signal for laser radar vertical measurement and judging whether cloud exists in the original echo signal; if no cloud signal exists, calculating the atmosphere vertical extinction coefficient by a Fernald method; removing the point with relatively great error on the atmosphere vertical extinction outline, and performing interpolation processing of the point; judging whether the extinction coefficient of an altitude point and at least 5 following consecutive points on the atmosphere vertical extinction outline is less than or equal to 0.1956, wherein the point is marked as the boundary altitude point n*L of atmosphere extinction coefficient; calculating the atmospheric transmissivity T1 between the measurement origin and the boundary altitude point n*L; inverting the average atmosphere extinction coefficient alpha between the measurement origin and the boundary altitude point n*L; and calculating the atmosphere vertical visibility V. In the invention, the algorithm is simple; and when no cloud exists above the laser radar equipment, the calculation result of atmosphere vertical visibility can be automatically provided in real time.

Description

technical field [0001] The invention relates to the application field of laser radar, in particular to a calculation method for detecting atmospheric vertical visibility by laser radar. Background technique [0002] Visibility is one of the main elements of meteorological elements. Visibility in the vertical direction of the atmosphere can not only reflect the stability of the atmosphere, but also serve as an important factor for judging the nature of air masses and studying air pollution. Visibility measurement in the vertical direction of the atmosphere can be applied in the fields of transportation, military affairs, science and technology, etc., providing the necessary safety guarantee for aircraft takeoff and landing and people's daily life. At present, the conventional visibility meter products are mainly for measuring horizontal meteorological visibility, and do not have the function of measuring vertical visibility. Bu Lingbing, Qiu Zujing, Hou Yuyun of Nanjing Univ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/53G01S17/95
CPCG01N21/538G01S17/95Y02A90/10
Inventor 余东升徐赤东纪玉峰方蔚恺杨喆张战盈张伟丽李艳蕾陆泽橼王燕飞
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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