The Study Of The Key Technology Of Atmospheric Aerosol Size Measurement Based On Light Scattering Method

The real-time and accurate measurement of aerosol particle is the hot topic， andthe aerosol particle size measurement technology based on light scattering method iswidely used for its feature of simple principle， wide measuring range， real-timemeasurement and so on. However， the measurement result of this technology isinfluenced by the factors such as particle refractive index， which leads tomeasurement error. This thesis did the research on the key technology of atmosphericaerosol particle size measurement with different refraction index， and mainlycompleted the following work:1. According to the Mie scattering principle， wrote the particle scattering lightintensity and luminous flux calculation procedures， and discussed the method toreduce the influence of particle index on size measurement through the simulationcalculation.2. Set five kinds of common aerosol particle in the atmospheric environment as theresearch object， calculated and simulated their F-D curves in different receivingparameters and obtained the suitable receive parameters for size measurement ofatmospheric aerosol particles based on a large number of F-D curves analyses.3. Based on the receiving parameters， designed and built a experiment measurementsystem of aerosol particle size. Calibrated the experimental system by usingstandard particles， and did size measurement experiment with particles of otherrefractive index, and verified the feasibility of this study method.