Aerosol refractive index measuring device based on particle diffraction and scattering

Abstract

The invention discloses an aerosol refractive index measuring device based on particle light diffraction and scattering. The device comprises a scattering cavity, the scattering cavity is provided with an air inlet / outlet and a light beam inlet / outlet, the axis connecting line of the air inlet / outlet is located on the vertical plane of the scattering cavity, and the air outlet is provided with an air extractor; the light beam inlet is located on the horizontal diameter of the scattering cavity and is provided with a light source, and the light beam outlet is provided with a diffracted light information measuring port and at least two scattered light information measuring ports which are respectively provided with the photoelectric detectors; the photoelectric detectors receive the diffracted light and scattered light information and convert the diffracted light and scattered light information into the corresponding electric signals, and the scattered light electric signals and particle diffraction information at different angles are processed and then are input into a data processing computer at the same time. According to the present invention, the particle concentration and the refractive index are measured at the same time according to the particle light diffraction and scattering information, so that the aerosol particles in the air are measured online in real time, and the device has the advantages of being simple in principle, being convenient to operate and being high in detection speed.

Description

technical field [0001] The invention relates to the field of atmospheric measurement, in particular to an aerosol refractive index measurement device based on particle diffraction and scattering. Background technique [0002] Atmospheric aerosol particles, especially pollution particles, are an important factor in the physical and chemical processes of the atmosphere. The existence of atmospheric particles directly affects the propagation of light in the atmosphere, resulting in the attenuation of light in the atmosphere. In recent decades, with the rapid development of industrial economy, the problem of air pollution has become more and more serious, and the climate has become more and more complex. The particulate matter in the air has brought serious harm to people's health. The concentration of particulate matter directly reflects the degree of air pollution. Particulate matter pollution causes low visibility, and fine particles enter the lungs to damage health. The meas...

AI Technical Summary

Problems solved by technology

At present, there are many methods for directly measuring particle concentration characteristics, such as microscopy and mass spectrometry, but methods and measuring devices that can simultaneously measure particle concentration and refractive index have not been reported, so research on simultaneous measurement of particle concentration and refractive index is A meaningful and urgently needed job

Images