Photoacoustic absorption cell and online measuring device for multiple optical parameters of atmospheric particulate matters

Abstract

The invention discloses a photoacoustic absorption cell and a synchronous online measuring device for multiple optical parameters of atmospheric particulate matters on the basis of the photoacoustic absorption cell. Absorption coefficients and scattering coefficients of the atmospheric particulate matters on the cell can be synchronously measured by the aid of the U-shaped photoacoustic absorption cell in an online manner on the basis of photoacoustic spectrum technologies and weak optical signal detection technologies, extinction coefficients and single-scattering albedo of the atmospheric particulate matters further can be obtained, and the multiple optical parameters of the particulate matters can be measured in an online manner. The photoacoustic absorption cell and the synchronous online measuring device have the advantages that the shortcomings of measurement errors due to spatial and temporal heterogeneity of samples when the samples are measured by multiple facilities or absorption coefficient measurement errors due to transmission errors during extinction and scattering synchronous measurement can be overcome, and the measurement accuracy and real-time performance of the single-scattering albedo can be effectively improved.

Description

technical field [0001] The invention belongs to the field of optics, and specifically relates to a device for synchronously measuring multiple optical parameters of atmospheric particulate matter on-line. The device uses photoacoustic spectroscopy technology and weak light signal detection technology to respectively measure the light absorption and scattering signals of the particulate matter, and directly obtain its absorption coefficient. And the scattering coefficient, and then obtain the extinction coefficient and single scattering albedo information of the particle, and realize the simultaneous online measurement of multiple optical parameters of the particle. Background technique [0002] Atmospheric particulate matter refers to the liquid or solid particle system suspended in the atmosphere with a diameter of 0.001 to 100 microns. It is one of the complex and harmful pollutants in the atmospheric environment. Atmospheric particles directly affect the earth's atmospher...

AI Technical Summary

Problems solved by technology

[0006] From the above discussion, it can be seen that most of the current measurement of the absorption and scattering of atmospheric particles is carried out independently by different instruments, so the sampling of particles has inhomogeneity in time and space, and the obtained single scattering albedo The rate parameter has a large uncertainty

At the same time, the use of multiple sets of equipment also greatly increases the economic cost

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