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CO2 detection method through difference absorbing laser radar based on aerosol disturbance correcting

A technology of laser radar and differential absorption, which is applied in the direction of color/spectral characteristic measurement, material analysis, radio wave measurement system, etc., and can solve problems such as unfounded

Active Publication Date: 2016-04-20
WUHAN UNIV
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Problems solved by technology

In this way, the aerosol will inevitably change during the wavelength switching process, so that in formula (2) and α(r,λ on )-α(r,λ off )≠0, then formula (3) cannot be established

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  • CO2 detection method through difference absorbing laser radar based on aerosol disturbance correcting
  • CO2 detection method through difference absorbing laser radar based on aerosol disturbance correcting
  • CO2 detection method through difference absorbing laser radar based on aerosol disturbance correcting

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Embodiment Construction

[0041] Combine below figure 1 , the specific embodiment of the present invention will be described in further detail.

[0042] The present invention first clarifies the CO shown in the formula (1) 2 Concentration inversion model corrected for CO 2 Probe Differential Absorption Lidar Inversion Method to Correct for Aerosol Variations on CO 2 Effects of Concentration Inversion. Features of the present invention have: (1) consider the change of aerosol in the alternate emission process of on wavelength and off wavelength, in CO 2 In the concentration inversion model, the extinction coefficient and backscattering coefficient of the aerosol are introduced; (2) The integral effect of the aerosol extinction coefficient and the absorption cross-sectional area in the inversion path is considered, and the integral equation is introduced.

[0043] Secondly, the meter scattering lidar with 1064nm and 1572nm wavelengths is used to observe at the same time and at the same place to ensur...

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Abstract

The invention discloses a CO2 detection method through difference absorbing laser radar based on aerosol disturbance correcting. The method comprises the following steps: firstly, considering the aerosol disturbance influence in a CO2 concentration inversion model; performing simultaneous observation of mie scattering laser radar in 1064nm and 1572nm wavelength, thereby acquiring a linear empirical relationship of an extinction coefficient and a backscatter coefficient of the aerosol in 1064nm and 1572nm wavelength; continuously detecting by using the mie scattering laser radar in 1064nm and 1572nm wavelength while performing conventional double-wavelength alternate emitting difference absorbing laser radar CO2 detection; acquiring the extinction coefficient and backscatter coefficient in on wavelength and off wavelength on the basis of the linear empirical relationship of the extinction coefficient and the backscatter coefficient; by combining with the CO2 concentration inversion model, acquiring a CO2 concentration inversion result. According to the method, the inversion result is more accurate. The method has wide application prospect in the field of detecting atmosphere trace gas through difference absorbing laser radar.

Description

technical field [0001] The invention relates to the technical field of atmospheric lidar, in particular to a differential absorption lidar CO based on aerosol disturbance correction 2 detection method. Background technique [0002] CO 2 As the main component of greenhouse gases, it is widely considered to have an important impact on the global climate. While the current CO 2 There is a large difference between the monitored concentration and the results obtained by various model inversions, which indicates that there are some unknown carbon sink mechanisms. Therefore, the atmospheric CO can be obtained with high precision 2 Concentration changes, and then regional CO 2 It is of great significance to study the sources and sinks of carbon emissions in order to deal with the increasing pressure of carbon emissions. Differential Absorption LiDAR in Detecting Atmospheric CO 2 It has its unique advantages in terms of concentration and is an ideal detection device for observ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/31G01S7/497
CPCG01N21/31G01N2201/1215G01N2201/127G01S7/497
Inventor 马昕刘刚龚威朱忠敏韩舸相成志梁艾琳郑玉新张腾
Owner WUHAN UNIV
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