An aerosol measurement system

Abstract

The invention discloses an aerosol measurement system which comprises a light path module, a gas circuit module, a cavity body module, a photoacoustic spectrum signal processing module, a cavity ring-down signal processing module and a control module, wherein the gas circuit module conveys protective gas and gas to be detected; the cavity body module comprises two buffer cavities and a photoacoustic tank between the buffer cavities; the photoacoustic spectrum signal processing module comprises a microphone; the microphone is externally connected with an amplifier; the cavity ring-down signal processing module comprises a photoelectric detector; the photoelectric detector is externally connected with the amplifier and an acquisition card sequentially; and the control module comprises a controller for controlling an electronic element, a computer for processing an acquired signal, and a power pack. Cavity ring-down and a photoacoustic spectrum of atmosphere aerosol are measured simultaneously in a single cavity body; parameters are measured in a single body and a single background; an extinction coefficient, an absorption coefficient and a scattering coefficient of the aerosol are obtained synchronously and integrally; an error is reduced; and optical properties of the atmosphere aerosol is obtained accurately.

Description

technical field [0001] The invention relates to the technical field of gas monitoring, in particular to an aerosol measurement system. Background technique [0002] Atmospheric aerosols refer to solid or liquid particles suspended in the air. Atmospheric aerosols not only affect atmospheric radiation and climate change, but also affect military, wireless laser communication and environmental fields. Serious secondary aerosols will cause environmental pollution, so master Its chemical properties are of great significance. Using optical methods to study its characteristics is an important way to study the chemical properties of atmospheric aerosols. Simultaneously obtaining aerosol scattering coefficients, absorption coefficients, and extinction coefficients is an important means to obtain optical properties such as aerosol single scattering albedo. However, atmospheric aerosols have great time and space variability, and the uncertainty is large. When different techniques are...

AI Technical Summary

Problems solved by technology

However, atmospheric aerosols have great time and space variability, and the uncertainty is large. When using different techniques to measure the same object on different equipment, the results obtained will have large errors.

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