Procedure for the determination of particle size distribution in

Details Procedure for the determination of particle size distribution in Procedure for the determination of particle size distribution in

1992-06-05

1994-05-03

Rosenberger, Richard A.

Optics: measuring and testing

For size of particles

377 11, G01N 1502, G01N 1514

Patent

active

053092155

ABSTRACT:
A method for automatic particle size analysis of a particle mixture by linear, optoelectronic scanning of a separated particle stream. Particle chord length categories are counted and converted to a particle size distribution. The method takes into account practical considerations such as mixed particle velocities and mixed grain shapes. The exposure time for the linear scanning determines, as a function of the diameter and the velocity of the smallest particle being measured, the number of particles per category size by means of appearance probabilities of recorded chord lengths for corresponding particle sizes. The determination of particle numbers is made using the sequence of the category of the largest particle diameters to the category of the smallest particle diameter, whereby, after each calculation of a particle size category, the number of chord lengths in the length category is corrected.

REFERENCES:
patent: 3676647 (1972-07-01), Staffin et al.

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