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

An atmospheric particle and sound absorption technology, applied in the field of optics, can solve problems such as single scattering albedo parameter uncertainty, increased economic costs, time and space inhomogeneity of particles, etc., to improve measurement accuracy and real-time performance, Effect of reducing equipment cost and improving measurement accuracy

Inactive Publication Date: 2017-05-10
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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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

Method used

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

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Embodiment Construction

[0022] The present invention will be further described below in combination with specific embodiments.

[0023] A photoacoustic absorption cell, comprising a resonant cavity 41, a matching body 42 is respectively arranged on the left and right sides of the resonant cavity 41, and is characterized in that: the resonant cavity 41 is in the shape of a U-shaped cylinder, and the U-shaped cylindrical Loudspeaker 5 and microphone 6 are respectively installed on the two ports of the vertical part of the body-shaped resonant cavity, and a photomultiplier tube 7 is installed in the middle of the horizontal part, and the photosensitive surface of the photomultiplier tube 7 is located in the resonance of the U-shaped cylinder shape. The horizontal part of the cavity 41; the matching body 42 includes a buffer cavity 421, and the buffer cavity 421 is connected horizontally with the horizontal part of the resonant cavity 41 in the shape of a U-shaped cylinder through a pipe, and the buffer c...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/01G01N21/17G01N15/00
CPCG01N21/01G01N15/00G01N21/1702G01N2021/1704
Inventor 刘强朱文越曹振松黄印博都小凡李学彬
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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