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Novel method for measuring absorption coefficient of atmospheric aerosol with light-heat method

An atmospheric aerosol and absorption coefficient technology, which is applied in the measurement of color/spectral characteristics, etc., to achieve the effect of improving the measurement range and accuracy, convenient operation and ingenious design

Active Publication Date: 2013-04-17
ANHUI INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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Problems solved by technology

[0008] The purpose of the present invention is to provide a new method with ingenious structure, strong environmental adaptability and real-time measurement for the deficiencies of the existing atmospheric aerosol absorption coefficient measurement technology

Method used

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  • Novel method for measuring absorption coefficient of atmospheric aerosol with light-heat method
  • Novel method for measuring absorption coefficient of atmospheric aerosol with light-heat method
  • Novel method for measuring absorption coefficient of atmospheric aerosol with light-heat method

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Embodiment Construction

[0028] like figure 1 As shown, the new method for measuring the absorption coefficient of atmospheric aerosol by photo-thermal method comprises a glass tube 1, a vacuum zone 15 is arranged between the inner and outer walls of the glass tube 1, the glass tube 1 is surrounded by a vacuum insulation box, and the glass tube 1 is provided with The aerosol inlet 2, the outlet 3 and the light beam inlet 7, the aerosol inlet, the outlet 2, 3 are respectively located at the two ends of the glass tube 1 and are all perpendicular to the glass tube 1, the aerosol inlet 2 is provided with an air valve 4 and a filter 5, Aerosol outlet 3 is provided with air pump 6, and the two ends of described glass tube 1 are provided with two concave mirrors 7,8, and wherein light enters in the glass tube by 7 places; Beam entrance 7 is provided with laser 9 as light source, laser 9 and A collimator and a beam splitter 10 are arranged on the optical path between the beam entrances 7. The beam emitted by ...

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Abstract

The invention discloses a novel method for measuring the absorption coefficient of atmospheric aerosol with a light-heat method. Based on the characteristics that light and particles interact with each other, a heat effect is generated when the light is absorbed by the particles and heat is not generated when the light is scattered by the particles, the light of a wavelength is transmitted in a heat-insulation glass pipe filled with the aerosol, and an absorption effect of the aerosol particles on the light can be measured by a temperature sensor in the glass pipe. With the novel method, the absorption effect of the particles on the light is directly measured, the suspension state of the particles is not changed in the measurement process, the air molecular absorption interference is effectively removed in the measurement process, the atmospheric aerosol can be continuously measured in real time on line, and a very good application prospect is showed for quantitative monitoring of meteorological environmental protection departments and research on the microphysical property of the aerosol.

Description

technical field [0001] The invention relates to the field of measurement of aerosol microphysical characteristics, in particular to a new method for measuring the absorption coefficient of atmospheric aerosol by using a light-heat conversion method, which can measure the absorption coefficient of atmospheric aerosol in real time. Background technique [0002] Aerosols are an important factor in the physical and chemical processes of the atmosphere, and many fields of atmospheric science are related to aerosols. The existence of atmospheric aerosol particles directly affects the propagation of light in the atmosphere, resulting in the attenuation of light in the atmosphere. The scattering and absorption characteristics of aerosol particles in the atmosphere are one of the main factors affecting light transmission. The absorption coefficient (imaginary part of the refractive index) of aerosol particles is an important parameter that determines the absorption characteristics of...

Claims

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Application Information

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IPC IPC(8): G01N21/31
Inventor 李学彬宫纯文朱文越高亦桥徐青山魏合理
Owner ANHUI INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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