FIELD: measuring technology.
SUBSTANCE: method for measuring the fraction of fine particles is proposed, which includes: step S1 of measuring the distance between the distance measuring device and pieces of material; step S2 of calculating the characteristic value of the feature from the distance data obtained at step S1; and step S3 of converting the characteristic value of the feature calculated at step S2 to the value of the fraction of fine particles. The characteristic value of the feature calculated at step S2 represents the distance fluctuation calculated from the distance data obtained at step S1. A higher proportion of fine particles on the pieces of material means a greater microscopic distance fluctuation caused by microscopic irregularity on the surface of the pieces of material in the direction of height in three-dimensional form.
EFFECT: fraction of fine particles on pieces of material can be measured in real time with high accuracy.
10 cl, 9 dwg
