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A method and device for detecting the mixing rate of non-spherical aerosol particles

A detection method, aerosol technology, applied in the field of environmental detection, can solve the problem that the relative ratio and distinction between non-spherical aerosol particles and spherical aerosol particles cannot be quantitatively obtained

Inactive Publication Date: 2018-12-28
SHANDONG UNIV +2
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  • Description
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Problems solved by technology

[0004] In the process of developing the technical solution of the present invention, the inventor found that the methods in the prior art can only qualitatively distinguish spherical aerosols or spherical aerosol particles based on experience, and cannot quantitatively obtain non-spherical aerosol particles and spherical aerosol particles. Relative proportion of particles
When analyzing an air pollution incident, whether it is dust aerosol or spherical aerosol particles is the main pollutant, it cannot be distinguished accurately and intuitively.

Method used

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  • A method and device for detecting the mixing rate of non-spherical aerosol particles
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  • A method and device for detecting the mixing rate of non-spherical aerosol particles

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Embodiment 1

[0018] figure 1 A schematic flow chart of the detection method for the mixing rate of non-spherical aerosol particles provided in Embodiment 1 of the present invention, as shown in figure 1 shown, including:

[0019] Step 101, using laser radar to measure the depolarization ratio of atmospheric aerosol.

[0020] Specifically, it can be measured by using a polarized rice scattering lidar, which emits a laser beam into the atmosphere, and the emitted laser beam is linearly polarized light, and the spherical aerosol particles of the laser beam and the aerosol particles in the atmosphere are in contact with the Non-spherical aerosol particles form scattered light, and the backscattered signal is received by the lidar. The depolarization of the backscattered light produced by spherical aerosol particles and non-spherical aerosol particles is different. The depolarization ratio of spherical aerosol particles is The non-spherical aerosol particles should be small, and the backscatt...

Embodiment 2

[0061] In order to further calculate the respective proportions of spherical aerosol particles and non-spherical aerosol particles in the atmospheric aerosol, the embodiment of the present invention determines the pollution type of the atmospheric aerosol according to the mixing rate of the aerosol particles in the previous embodiment After the step, it may further include: calculating the backscattering coefficient of the non-spherical aerosol particles in the atmospheric aerosol and the backscattering coefficient of the spherical aerosol particles through the mixing ratio of the non-spherical aerosol particles.

[0062] The backscattering coefficient of the spherical aerosol particles in the atmospheric aerosol is calculated according to the mixing ratio of the non-spherical aerosol particles. Specifically, the backscattering coefficient of spherical aerosol particles is calculated by the following formula:

[0063] beta nd =(1-R)β p ………………………………(14)

[0064] Among them, ...

Embodiment 3

[0076] The embodiment of the present invention also provides a detection device for the mixing rate of non-spherical aerosol particles, figure 2 A schematic structural view of the non-spherical aerosol particle mixing rate detection device provided in Embodiment 3 of the present invention, as shown in figure 2 As shown, it includes a measurement module 31 and a calculation module 32 connected in sequence.

[0077] The measurement module 31 is used to measure the depolarization ratio of atmospheric aerosol by using laser radar.

[0078] The calculation module 32 is used to calculate and obtain the depolarization ratio of the non-spherical aerosol particles and the depolarization ratio of the spherical aerosol particles in the atmospheric aerosol, as well as the measured depolarization ratio of the atmospheric aerosol. Mixing ratio of sol particles.

[0079] Wherein, the mixing ratio of non-spherical aerosol particles is used to indicate the proportion of non-spherical aeros...

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Abstract

The invention provides a non-spherical aerosol particle mixing ratio detecting method and device. The method comprises the steps that the mixing ratio of non-spherical aerosol particles is calculated according to the depolarization ratio of the non-spherical aerosol particles in atmospheric aerosol, the depolarization ratio of spherical aerosol particles and the depolarization ratio of the atmospheric aerosol, accordingly the pollution type of the atmospheric aerosol can be accurately and visually determined according to the proportion, embodied by the non-spherical aerosol particle mixing ratio, of the non-spherical aerosol particles of the atmospheric aerosol in the aerosol particles.

Description

technical field [0001] The invention relates to a method and a device for detecting the mixing rate of non-spherical aerosol particles, which are especially applied to the detection of relevant parameters of the atmospheric environment and belong to the technical field of environmental detection. Background technique [0002] Atmospheric aerosols are a mixture of solids, liquids, and gases suspended in the air. Aerosols will contain liquid (fog), fine particles, such as spherical aerosol particles such as urban aerosol PM2.5, and non-spherical aerosol particles, such as construction site dust, sandstorm particles, ice crystals, etc. The type of atmospheric aerosol It will affect the degree of air pollution and visibility. Polarized rice scattering lidar can be used as a remote sensing instrument to distinguish the types of atmospheric aerosols, and is widely used in meteorology, transportation, environmental monitoring and other fields. [0003] In the prior art, the metho...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N15/02G01N15/06
CPCG01N15/0205G01N15/06G01N2015/0693
Inventor 刘文利侯鲁健吕波徐宝东
Owner SHANDONG UNIV
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