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Atmospheric Aerosol Scattering Coefficient Spectrum In-situ Measuring Device and Measuring Method

A technology of atmospheric aerosol and scattering coefficient, which is applied in the direction of measuring device, scattering characteristic measurement, material analysis through optical means, etc. It can solve the problems of poor measurement accuracy and achieve the effect of convenient operation, high detection sensitivity and simple principle

Inactive Publication Date: 2011-11-30
ANHUI INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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Problems solved by technology

[0005] The purpose of the present invention is to provide an in-situ measurement device and measurement method for the scattering coefficient spectrum of atmospheric aerosols, so as to solve the problem of poor measurement accuracy when using an integral turbidity meter for measurement

Method used

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  • Atmospheric Aerosol Scattering Coefficient Spectrum In-situ Measuring Device and Measuring Method

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specific Embodiment

[0072] 1. Fix the integrating sphere with screws to ensure its relative sealing and good light sealing, and ensure that the PTFE coating at the junction of the two hemispherical cavities of the integrating sphere is smooth. Fix the integrating sphere on a stable support with appropriate height and load-bearing capacity, so that the air valve and gas flow pipe at the sample outlet can be easily adjusted, and ensure that the axis connecting the sample inlet and outlet is perpendicular to the horizontal plane.

[0073] 2. Once the integrating sphere and the equipment used in the present invention are determined, the opening ratio becomes a definite value. use the formula Obtain the opening ratio of the integrating sphere, there are 7 openings in total, so the range of i is from 1 to 7.

[0074] 3. Adjust the solar simulator so that its outgoing light is in the horizontal direction. Adjust the plane of the beam splitter to be strictly perpendicular to the two beams of the solar...

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Abstract

The invention discloses an in-situ measurement device and a measurement method of a scattering coefficient spectrum of an atmospheric aerosol. The measurement device comprises an integrating sphere, a solar simulator, a fiber spectrometer and a computer, wherein an internal reflectance coating of the integrating sphere is made from polytetrafluoroethylene, and collection efficiency of the scattered light is improved based on the advantage of truncated corners of the internal reflectance coating, so that the sensitivity in the measurement of the scattering coefficient spectrum is effectively strengthened. In the device and the method, a measure equation for the scattering coefficient spectrum in a wave range from 350 nm to 1000 nm is established, so that the difference of conversion responsivity caused by the difference of the wavelength in a photoelectric conversion process can be effectively avoided. The device and the method can detect evolution rules of the scattering coefficient spectrum of the atmospheric aerosol with the temperature, the humidity and the atmospheric pressure, and have the characteristics of being simple in principle, convenient in operation and fast in detection speed.

Description

technical field [0001] The invention relates to the field of atmospheric aerosol measurement, in particular to an in-situ measurement device and measurement method for the scattering coefficient spectrum of atmospheric aerosol. Background technique [0002] The scattering of light by atmospheric aerosols changes the spatial distribution of light and increases the complexity of the spatial distribution of radiant energy. Obtain the spectrogram formed by the atmospheric aerosol scattering coefficient corresponding to each wavelength in the wide band, and investigate the variation law of the scattering coefficient spectrum with temperature, humidity and air pressure, which can deepen the understanding of the optical characteristics of aerosol and expand the radiation of laser in the atmosphere Transport research, more accurately assessing the radiative forcing and climate impact of atmospheric aerosols, has important academic significance and potential application value. [00...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/49G01N21/01
Inventor 邵士勇张伟朱文越饶瑞中
Owner ANHUI INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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