Ozone concentration inversion method based on horizontal scanning laser radar

A technology of ozone concentration and lidar, which is used in the re-radiation of electromagnetic waves, the measurement of color/spectral characteristics, and the use of re-radiation, etc., to achieve the effect of high detection efficiency and large coverage.

Inactive Publication Date: 2021-11-23
中科经纬检测科技(苏州)有限公司
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Problems solved by technology

[0004] In the prior art, for the monitoring of ozone concentration, vertical detection is mostly based on the principle of differential absorption, and there are few related technologies based on horizontal scanning remote sensing detection. Therefore, this application provides a kind of ozone monitoring based on horizontal scanning detection technology

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  • Ozone concentration inversion method based on horizontal scanning laser radar
  • Ozone concentration inversion method based on horizontal scanning laser radar
  • Ozone concentration inversion method based on horizontal scanning laser radar

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Embodiment

[0053] Example: Reference figure 1 Shown is a method for inversion of ozone concentration based on horizontal scanning lidar, the method may include the following steps:

[0054] T1: Obtain the ozone concentration distribution on the horizontal plane by scanning the echo signal of the lidar to obtain the original data;

[0055] T2: Preprocessing the raw data;

[0056] T3: Use the Collis method to perform segmented sliding fitting on the entire profile with a fixed fitting step. During the fitting process, the fitting correlation coefficient, fitting extinction value, corresponding reference height, and signal-to-noise ratio are returned. In the data whose signal-to-noise ratio is greater than the empirical threshold of the signal-to-noise ratio, an extinction coefficient value with the highest correlation and the farthest reference height is selected as the initial reference value, and the height corresponding to the initial reference value is used as the reference height;

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Abstract

The invention discloses an ozone concentration inversion method based on a horizontal scanning laser radar. The method comprises the following steps of: obtaining ozone concentration distribution on a horizontal plane through scanning an echo signal of a laser radar, and obtaining original data; preprocessing the original data; carrying out segmented sliding fitting on the whole profile at a fixed fitting step length by utilizing a Collis method, and selecting an initial reference value from data of which the signal-to-noise ratio is greater than a signal-to-noise ratio empirical threshold; and carrying out forward integration and backward integration by utilizing a Fernald method, converting the aerosol extinction coefficient obtained by calculating the weak absorption wavelength into the aerosol extinction coefficient of the strong absorption wavelength by utilizing a wavelength conversion coefficient, and substituting the aerosol extinction coefficient into a differential absorption formula to obtain the ozone concentration. According to the ozone concentration inversion method based on a horizontal scanning laser radar, error calculation is carried out by combining a Collis method and a Fernald method based on the horizontal scanning detection and differential absorption principle, and horizontal scanning monitoring of regional ozone pollution distribution is realized.

Description

technical field [0001] The present application relates to the technical field of ozone concentration monitoring, in particular to an ozone concentration inversion method based on horizontal scanning laser radar. Background technique [0002] Ozone usually exists in the upper atmosphere about 30 kilometers from the ground. It can effectively block ultraviolet rays and protect human health. The so-called ozone pollution is always inseparable from photochemical smog, and what is commonly referred to as ozone pollution actually refers to photochemical smog. In recent years, ozone pollution in ambient air in my country has become prominent, especially in summer, ozone has repeatedly become the primary air pollutant in many cities, and it is an important pollutant that restricts the improvement of ambient air quality. Anthropogenic O3 is produced by the photochemical reaction of pollutants such as nitrogen oxides (NOx) and volatile organic compounds (VOCs) that are artificially e...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S17/88G01S7/48G01N21/31
CPCG01S17/88G01S7/4802G01N21/31
Inventor 张雷王延成
Owner 中科经纬检测科技(苏州)有限公司
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