Study Onadaptive Algorithm Of Laser Particle Sizer

Laser particle sizer which based on the principle of laser diffraction is one of the most widely used in particle size measurement.In laser particle size analyzing,each algorithm has its inversion condition and application scope.The results may have been solved deviation when measuring different size and different width of the particles.According to the characteristics of particle light distribution,this paper has used of similarity theory to predict the distribution of particle size.The adaptive step adjustment coefficient has been calculated based on the predicted distribution which will be used in Projection algorithm to measure the distribution of particle size.Main work and innovation are as follows:1. This paper has researched the relationship of particle size, particle width and hybrid particle to the light distribution .Using a method to predict the distribution of particle size which based on similatity.2. Research the advantages and disadvantages of Projection algorithm and some other non-mode inversion algorithms which based on Projection algorithm. The adaptive Projection algorithm which calculate the step adjustment coefficient based on the predicted distribution has been proposed. Finally, the algorithm threshold for convergence is discussed.3. Using adaptive Projection algorithm to measure the standard particle board and national standard material, compared the result with improved Projection algorithm which introducing an increasing fine coefficient and Projection algorithm which introducing an improved fall coefficient. The results show that the adaptive Projection algorithm is effective.