Synchronous measurement system for aerosol

Abstract

The invention discloses a synchronous measurement system for aerosol. The synchronous measurement system comprises a light path module, a gas circuit module, a cavity module, a photo-acoustic spectrometry signal processing module, a cavity ring-down signal processing module and a control module, wherein the light path module comprises a laser, an isolator, a collimation diaphragm group and a multi-stage steering light path, wherein the cavity module comprises a buffering cavity and a photo-acoustic tank; the photo-acoustic spectrometry signal processing module comprises a rheomicrophone and arheomicrophone external amplifier; the cavity ring-down signal processing module comprises a photoelectric detector, an external amplifier and an external capture card; and the control module comprises a controller, a computer and a power supply group, and the computer is used for processing collected signals. By simultaneously measuring cavity ring-down and photo-acoustic spectrometry of atmospheric aerosol in the same cavity, the measurement of parameters of the same body finished under the same background, and the extinction coefficient, absorption coefficient and scattering coefficient ofthe aerosol are synchronously and integrally acquired, so that the errors are reduced, and the optical property of the atmospheric aerosol is accurately acquired.

Description

technical field [0001] The invention relates to the technical field of gas monitoring, in particular to an aerosol synchronous 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 te...

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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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