Height distribution detection device and method for PM2.5 mass concentration

Abstract

The invention discloses a height distribution detection device and method for PM2.5 mass concentration. The device is formed by respectively electrically connecting a PM2.5 particle detector (2) and a CCD lateral scattering laser radar (1) with a data processor (3) through serial interfaces or parallel interfaces. The method comprises the following steps: enabling the PM2.5 particle detector and the CCD lateral scattering laser radar to simultaneously work in the same place, and sending the PM2.5 mass concentration on the ground detected by the PM2.5 particle detector and the aerosol backscattering coefficient retrieved by the CCD lateral scattering laser radar to the data processor together; then, dividing the PM2.5 mass concentration on the ground by the aerosol backscattering coefficient on the ground with the data processor, and thus obtaining a proportionality coefficient; multiplying the proportionality coefficient by the aerosol backscattering coefficient on different heights, and thus obtaining the height distribution of PM2.5 mass concentration. The method can conveniently detect the PM2.5 mass concentration on the different heights and can be widely applied to the fields of the research on the rules of pollutant diffusion, environmental assessment, forecast and governance.

Description

technical field [0001] The invention relates to a detection device and a detection method for the height distribution of mass concentration, in particular to a detection device for the height distribution of PM2.5 mass concentration and a detection method thereof. Background technique [0002] PM2.5 is the general term for particles with a particle size of less than 2.5 microns in the atmosphere. They are an important part of aerosols in the atmosphere and are mainly distributed in the near-surface layer. PM2.5 has a larger specific surface area and is easier to accumulate toxic substances than coarse particulate matter. Because they are more harmful to the human body, they have attracted widespread attention. For example, European and American countries have carried out sampling and monitoring of fine particulate matter since the 1990s. The United States also issued a PM2.5 mass concentration in 1997. Environmental standard: the daily average is 65μg / m 3 , with an annual ...

AI Technical Summary

Problems solved by technology

Although this kind of instrument can also measure the mass concentration of PM2.5, because it is an in-situ detection type, it can only be arranged at limited points to measure the mass concentration of PM2.5 in the near-surface layer, and cannot measure the mass concentration of PM2.5 The height distribution of the mass concentration is detected

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