Device for determining particle sizes

摘要

A method for measuring particle size distributions of bulk materials such as cereals, cereal milling products, cereal products and the like, which is intended to enable the measurement of particle size distributions which vary by orders of magnitude. A sample of isolated particles is optically detected in an arrangement by at least two measurement methods. Preferably, detection of the contours of the particles and laser diffraction take place at the same time.

主权项

1. A method for determining a size distribution of particles, in use in the area of processing of cereal, cereal grinding products and cereal end products of milling or special milling or in the production of feedstuff for farmed or domestic animals, fish and crustaceans, for particles in a particle-containing product stream produced by size-reduction, purifying, separation, mixing and/or agglomeration and having particle sizes ranging from 2 μm to 20 mm, said method comprising the following steps:
a) generating measurement data by optically capturing at least a portion of the particles using at least two different optical measurement methods at a measurement region, wherein at least one optical measurement method comprising the capturing of a laser diffraction pattern of the portion of the particles and at least one optical measurement method comprises the capturing of projection surface areas of the portion of the particles, b) determining particle size distributions of the portion of the particles on the basis of the measurement data which is captured optically in step a); and c) calibrating the determined particle size distributions, whereby the particle size distributions are combined to form one common distribution over the entire measurement region.