Atmospheric aerosol particle tube diffuser

Abstract

The invention provides a tube-shaped diffusion device for atmospheric aerosol particles, which is characterized in that a PVC tube with a diameter of 35 cm is used, each tube is 6.2 meters long, and there are 4 tubes in total. The dye is painted black and forms a gas diffuser that keeps the aerosol particles in a natural state of suspension. Both ends of the tube are sealed with high-transparency quartz glass, and illuminance and brightness test holes are reserved, with illuminance measurement holes on both sides and spectrum test holes in the middle. There is a temperature and humidity test hole, two medium filling ports and a drying port in the middle of each pipe body. To prevent the light source from directly shining on the measuring probe, place colorless frosted glass with the same inner diameter as the tube at the two ends of the diffuser at a distance of 10cm from the tube opening. The tubular diffuser can simulate the natural suspension state of atmospheric aerosol particles, and provides an experimental device for measuring the atmospheric visibility and the transmittance of artificial light sources in different concentrations of atmospheric aerosol particles.

Description

technical field [0001] The patent of the present invention relates to a tubular diffuser for atmospheric aerosol particles, in particular to the field of lighting detection. Background technique [0002] At present, the commonly used filter-type diffuse technology: this method makes the particles in the atmospheric aerosol be adsorbed on the filter membrane in the filter by pumping air, and uses the property that the attenuation of light is proportional to the deposition of particles, and compares the properties of passing through aerosol filtration. The change in the light intensity of the film and the reference light determines the aerosol absorptivity. The limitation of this method is that during the experiment, the aerosol particles are adsorbed (moved) on the filter membrane in the filter, and the optical path in the filter is too short (usually less than 0.3 meters), so that the aerosol particles are in a very The natural suspension state increases the optical interac...

AI Technical Summary

Problems solved by technology

The limitation of this method is that during the experiment, the aerosol particles are adsorbed (moved) on the filter membrane in the filter, and the optical path in the filter is too short (usually less than 0.3 meters), so that the aerosol particles are in a very The natural suspension state increases the optical interaction between the deposited particles. In addition, the shape of the filter and the suction intensity and time of obtaining the particle deposition are different, which will cause large dispersion and low accuracy of the measurement results.

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