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Optical simulation system and method for characterizing irregular degree of particulate matter

An optical simulation, particle technology, applied in the direction of particle size analysis, particle and sedimentation analysis, scientific instruments, etc., to achieve the effect of improving detection level and reasonable structure

Active Publication Date: 2022-02-15
INST OF ATMOSPHERIC PHYSICS CHINESE ACADEMY SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The object of the present invention is to provide an optical simulation system and method for characterizing the degree of particle irregularity, thereby solving the aforementioned problems in the prior art

Method used

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  • Optical simulation system and method for characterizing irregular degree of particulate matter
  • Optical simulation system and method for characterizing irregular degree of particulate matter
  • Optical simulation system and method for characterizing irregular degree of particulate matter

Examples

Experimental program
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Effect test

Embodiment 1

[0061] An optical simulation system for characterization of particle irregularities, comprising an incident light module, a scattering measurement cavity, and an intensity detection module; the incident light module, the scattering measurement cavity, and the intensity detection module are arranged coaxially;

[0062] A forward scattered light measurement module and a backscattered light depolarization ratio measurement module are arranged in the scattering measurement cavity, and the forward scattered light measurement module and the backscattered light depolarization ratio measurement module are aligned with the laser emission direction angle setting.

[0063] The installation direction of the forward scattered light measurement module described in this embodiment is at an angle of 45° to the laser emission direction;

[0064] The installation direction of the backscattered light depolarization ratio measurement module and the laser emission direction form an included angle ...

Embodiment 2

[0072] This embodiment provides an optical simulation method for characterizing the degree of particle irregularity, using the optical simulation system described in Example 1, including the following steps:

[0073] S1, the incident light module emits laser light, enters the measurement cavity module, and intersects with the aerosol particle beam in the measurement cavity module to scatter;

[0074] S2, the forward scattered light after scattering enters the forward scattered light measurement module to measure the light intensity, and the back scattered light enters the backscattered light depolarization ratio measurement module to calculate the depolarization ratio and characterize the irregularity of particle morphology ;

[0075] S3. The data acquisition processor acquires the test results of the forward scattered light measurement module and the backscattered light depolarization ratio measurement module, and transmits the results to the remote control center.

[0076] ...

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Abstract

The invention provides an optical simulation system and method for characterizing the irregular degree of particulate matter, and relates to the technical field of atmospheric monitoring, and the optical simulation system comprises an incident light module, a scattering measurement cavity and an intensity detection module; the incident light module, the scattering measurement cavity and the intensity detection module are coaxially arranged; and a forward scattered light measurement module and a backward scattered light depolarization ratio measurement module are arranged in the scattering measurement cavity, and the forward scattered light measurement module and the backward scattered light depolarization ratio measurement module are arranged at an angle with the laser emission direction. According to the design, through calculation of a strict T-Matrix optical model, the position of the optical lens is reasonably arranged, and through repeated measurement and calculation in a laboratory, a high instrument signal-to-noise ratio is guaranteed. By establishing a reasonable lens group arrangement sequence and adopting the combination of the collimating lens and the condensing lens, a design target of effectively detecting the irregularity degree of environmental particulate matters in real time is achieved, data are transmitted to a remote monitoring center in real time, and the detection level of the irregularity degree of atmospheric pollutants is improved to a certain extent.

Description

technical field [0001] The invention relates to the technical field of real-time monitoring of the atmospheric environment, in particular to an optical simulation system and method for characterizing the irregularity of particulate matter. Background technique [0002] At present, the monitoring of air pollution particles mainly focuses on the concentration, chemical composition and other properties. There are relatively few real-time monitoring of the depolarization properties of single particles, and it is difficult to detect the irregularity of environmental particles, so the judgment of environmental pollutants is inaccurate. At present, there is a lack of relevant commercial instruments, and the existing instruments and equipment for characterizing the degree of particle irregularity lack scientific guidance for the selection of scattered light detection angles, and there is also a large deviation in the final data obtained. Therefore, there is an urgent need to adjust...

Claims

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Application Information

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IPC IPC(8): G01N15/00G01N15/02G06F17/16
CPCG01N15/00G01N15/0211G06F17/16
Inventor 潘小乐田雨王自发
Owner INST OF ATMOSPHERIC PHYSICS CHINESE ACADEMY SCI
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