METHOD FOR MEASURING THE SIZES OF PARTICLES DISPERSED IN A FLUID STREAM AND SYSTEM THEREFOR

摘要

The present invention relates to a method for measuring the sizes of particles dispersed in a fluid stream (2) following a line (3), wherein an acoustic vibration is imparted to the stream of fluid and particles following the line (3) as an excitation vibration and a response vibration of the particles to the excitation vibration is measured, and wherein an evaluation is performed by comparing the excitation vibration and the response vibration with regard to vibration velocity, vibration amplitude and/or phase shift to determine the sizes of the particles. Furthermore, the invention relates to a system for measuring the sizes of particles dispersed in a fluid stream following a line (3), comprising: excitation devices (E), in order to impart an acoustic vibration to the stream of fluid and particles following the line (3) as an excitation vibration, detector devices (D), in order to measure a response vibration of the particles to the excitation vibration, and processing devices (V) for determining the sizes of the particles by comparing the excitation vibration and the response vibration with regard to vibration velocity, vibration amplitude and/or phase shift.