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PM2.5 concentration detection system and detection method based on photoelectric fusion

A technology for PM2.5 and concentration detection, which is applied in measuring devices, suspension and porous material analysis, and particle suspension analysis. The effect of hardware production precision

Inactive Publication Date: 2017-05-10
BEIJING JIAOTONG UNIV
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Problems solved by technology

Based on this principle, most of the mainstream products in the market are laser-based scattering PM2.5 concentration meters. Although the detection accuracy is high and the repeatability is good, the equipment is expensive and difficult to popularize.

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  • PM2.5 concentration detection system and detection method based on photoelectric fusion
  • PM2.5 concentration detection system and detection method based on photoelectric fusion
  • PM2.5 concentration detection system and detection method based on photoelectric fusion

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Embodiment Construction

[0035] The present invention provides a PM2.5 concentration detection system and detection method based on photoelectric fusion. The present invention will be further described below in conjunction with the accompanying drawings and specific implementation methods.

[0036] Detection principle and flow process of the present invention are as figure 1 As shown, the system structure is as figure 2 As shown, the label Cx represents the measurement capacitance, and D represents the direction of the wind.

[0037] The system consists of a ventilation chamber 1, a measurement chamber 3, and a detection part; the measurement chamber 3 is funnel-shaped with a wide front and a narrow rear, and the wide ends of the ventilation chamber 1 and the measurement chamber 3 are separated by a gas cutter 2; The narrow end of the measuring chamber 3 is connected with the detection channel. The cross-section of the connection between the ventilation chamber 1 and the measurement chamber 3 is re...

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Abstract

The invention belongs to the technical field of PM2.5 concentration detection and particularly relates to a system and a method for PM2.5 concentration detection based on photoelectric integration. The system consists of a ventilation chamber, a measurement chamber and a detection part, wherein the ventilation chamber is separated from the measurement chamber by a gas cutter, and the other end of the measurement chamber is connected with a detection channel; the detection part is arranged at the periphery of the detection channel and consists of an optical detection part, a power detection part and a data processing part; the optical detection part and the power detection part are respectively connected with the data processing part. The concentration of PM2.5 particles is respectively detected through optical detection and power detection, and then, fusion calculation is carried out on two detection signals by a kalman filtering algorithm. As no laser generator is used in the invention, the cost of the system is greatly reduced. Meanwhile, detection data is obtained by the detection method adopting two different principles, and the actual value is obtained through fusion calculation, so that the detection precision of the system can be ensured.

Description

technical field [0001] The invention belongs to the technical field of PM2.5 concentration detection, in particular to a PM2.5 concentration detection system and detection method based on photoelectric fusion. Background technique [0002] PM2.5, also known as particles that can enter the lungs, refers to particles with an aerodynamic diameter less than or equal to 2.5 microns. The atmospheric aerosol formed in the air has a larger extinction coefficient than the aerosol formed by particles in the rest of the particle size range. , is the main pollutant of the "smog" phenomenon that has been common this year. Due to the large specific surface area of ​​PM2.5, it is easy to adsorb toxic and harmful substances, and provide a reaction bed for atmospheric reactants to generate secondary pollutants, so it is extremely harmful to the environment. [0003] When light is irradiated on PM2.5 aerosols, due to the scattering, absorption and divergence of light by particles, there is a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N15/06
Inventor 刘犇陈广华
Owner BEIJING JIAOTONG UNIV
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