Three-band integrated atmospheric aerosol particle scattering coefficient measuring instrument and measuring method
An atmospheric aerosol and particle scattering technology, applied in the fields of environmental protection and meteorological monitoring, to avoid scattering calculation problems, correct angle truncation errors, and measure a wide range of effects
Active Publication Date: 2013-04-10
安徽工业技术创新研究院
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Problems solved by technology
So far, there is no instrument for directly measuring the scattering coefficient of atmospheric aerosol particles in China.
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[0026] see figure 1 , figure 2 and image 3 , a three-band integral atmospheric aerosol scattering coefficient measuring instrument, including an optical measurement chamber and the components arranged on it, a calibration gas circuit (standard gas gas circuit, zero gas intake gas circuit) and the components arranged on it, and a measuring gas The circuit (sample gas inlet circuit, sample gas outlet circuit) and its accessories and signal processing control and display circuit; the signal processing control and display circuit are respectively connected with the components on the optical measurement chamber, calibration gas circuit and The components arranged on it are electrically connected to the measuring gas circuit and the accessories on it.
[0027] Among them, the optical measurement chamber and the components configured on it are:
[0028] Including the optical measurement chamber, the inner wall of the optical measurement chamber is coated with matte black paint; ...
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Abstract
The invention discloses a three-band integrated atmospheric aerosol particle scattering coefficient measuring instrument and a three-band integrated atmospheric aerosol particle scattering coefficient measuring method. The measuring instrument comprises an optical measurement chamber, a light-emitting-diode (LED)-based integrating sphere light source (7) is arranged at the top of the chamber, a plurality of diaphragms (19, 20, 21, 22, 23 and 24) are arranged in the chamber, and a reflector (9) is arranged at a non-detection end to prevent multiple times of scattered light from entering a detector (11); and a sample gas inlet port (17) and a gas outlet port (18) are formed in the chamber, and the sample gas is extracted through a sampling pump (13) and enters a scattering cavity (8) from the gas inlet port. When the integrating sphere light source (7) is lightened, the light emitted from the light source is irradiated on the sample gas, and the actual measured scattered light intensityis received through a single photon detector (11) and converted into the measured photon number; a frosted glass (28) with stable performance is used for generating scattered light to eliminate errors caused by light intensity fluctuation of a light source and magnification drift of a photoelectric multiplier tube; through the standard gas and the zero gas, the measured scattering coefficient is calibrated and the air Rayleigh scattering background is deducted; and the single photon detector converts the received scattered light signals into electrical signals, then the electrical signals areprocessed and controlled by a micro processing control circuit, the scattering coefficient is measured in real time, and the data are transmitted to a touch screen (16) and displayed. The measuring instrument has good instantaneity, high measurement precision and stable system, and is easy for maintenance.
Description
technical field [0001] The invention relates to the fields of environmental protection and meteorological monitoring, in particular to an instrument and method for real-time on-line monitoring of the scattering coefficient of atmospheric aerosol particles. Background technique [0002] Atmospheric aerosol is a multiphase system composed of liquid and solid particles and gases with a diameter of 0.1-10 μm, which has great time and space changes. In the natural dry and clean atmosphere, the mass concentration of atmospheric aerosols is 1 μg m -3 Below, in urban polluted atmosphere, aerosol mass concentration can reach several milligrams per cubic meter. In recent years, atmospheric aerosol, as one of the important driving factors of global climate change, has become one of the hot issues in current global change research. A series of research work has been carried out at home and abroad to understand the optical properties and radiation characteristics of atmospheric aerosol...
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IPC IPC(8): G01N21/51
Inventor 李季王月琴陈明星马兵戚俊
Owner 安徽工业技术创新研究院