Development of Atomized Particle Size and Velocity Measurement System Based on Particle Trajectory Images

To characterize the atomization property of nozzles in the humidifying,casing and flavoring processes of tobacco primary processing line,a method for measuring atomization images based on particle trajectory images was studied,and a platform for measuring the particle size and velocity was developed.The results showed that:1) The influences of intensive light scattering caused by steam medium on the extraction of particle images were eliminated by the image processing method of matrix sub-pixel when a steam ejector was used.2) From images collected frame by frame and particle number count with the developed automatic image acquisition and calculation software,it was found that when the particle number in a particle population was greater than 5000,their size and velocity presented a normal distribution.3) The mentioned method was competent for characterizing the atomization property of liquid atomized by a steam ejector or compressed-air ejector,it fitted the requirements of industrial application for the performance inspection,type selection and parameter optimization.