He Zhenjiang Yang Guanling Chen Wei Xie Lili Guo Yongcai Li Ping Luo Gang

(Instiute of Opto- electronic Precision Mechanism, Chongqing University)

Abstract

This paper introduced the foundamental theory and two method for measuring particle size based on Brownian movement information,i.e. the obtaining methods of particle size information and particle's motive velocity information. The working principle of the sensor for obtaining particle's Brownianmovtive velocity,the difficulty and analysis of sensitivity threshole for detecting sensor were explained in detail. Some situationsof computer simulated in digit and experimental measure were also introduced.

Keywords：particle's Brownian movement;particle size measurement;particle's motive velocity

DOI：10.13732/j.issn.1008-5548.1996.02.002