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Aerosol pollutant distribution detection method based on absorption extinction ratio calibration profile line

A technology of pollutant distribution and detection method, applied in the field of real-time detection of aerosol pollutant distribution

Inactive Publication Date: 2016-10-05
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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Problems solved by technology

However, so far, there have been no reports that directly provide real-time measurement methods for the source and vertical distribution of aerosol pollutants

Method used

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  • Aerosol pollutant distribution detection method based on absorption extinction ratio calibration profile line
  • Aerosol pollutant distribution detection method based on absorption extinction ratio calibration profile line
  • Aerosol pollutant distribution detection method based on absorption extinction ratio calibration profile line

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Embodiment Construction

[0038] Such as figure 1 As shown, the aerosol pollutant distribution detection method based on the calibration profile of the absorption extinction ratio is characterized in that: the absorption coefficient and scattering coefficient of the aerosol at the ground measurement point are measured respectively by the dual-wavelength photothermal interference method and the dual-wavelength broadband cavity enhancement method , further analyze the absorption coefficient and scattering coefficient of the aerosol at the ground measurement point to obtain the optical parameters of the aerosol at the ground measurement point, realize the determination of the aerosol composition at the ground measurement point, and further determine the absorption and extinction ratio of the aerosol at the ground measurement point; The scattered lidar method obtains the aerosol extinction coefficient profile from the ground measurement point to the effective measurement range of the lidar. Based on the ab...

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Abstract

The invention discloses an aerosol pollutant distribution detection method based on an absorption extinction ratio calibration profile line. The absorption coefficient of the corresponding wavelength of an aerosol to be detected is acquired by utilizing a photothermal interference method; the wavelength index of the aerosol sample is given; the extinction coefficient of the corresponding wavelength of the aerosol to be detected is acquired by utilizing a broadband cavity enhancement method, and single scattering albedo of the corresponding wavelength is acquired according to the absorption coefficient and the extinction coefficient of the aerosol sample; and the extinction coefficient profile line of the aerosol above a sampling point is acquired by utilizing mie-scattering laser radar. The aerosol component and source of the sampling point are determined through the wavelength index and the single scattering albedo so that aerosol pollution vertical distribution above the sampling point is calibrated by the extinction coefficient profile line according to the constant absorption extinction ratio.

Description

technical field [0001] The invention relates to a method for obtaining the vertical distribution of atmospheric aerosol pollutants by combining three optical measurement technologies, and specifically discloses a method for realizing different aerosols by using three measurement methods: photothermal interference method, broadband cavity enhancement method and meter scattering laser radar. A method for real-time detection of the distribution of aerosol pollutants through the measurement of parameters and the analysis of these measurement parameters. Background technique [0002] Atmospheric aerosols refer to liquid or solid particles with a diameter of 0.001-100 μm suspended in the atmosphere, mainly distributed within several kilometers at the bottom of the troposphere, and their concentration usually decreases exponentially with the increase of vertical height. The distribution, physical and chemical properties (including particle size, spectral distribution, chemical comp...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S17/95G01N21/45G01N21/359G01N21/3504G01N21/33
CPCG01N21/33G01N21/3504G01N21/359G01N21/45G01N2021/451G01S17/95Y02A90/10
Inventor 邵士勇朱文越刘强曹振松李树旺谢晨波
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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