Concentration profiling using a novel acoustic backscatter system with single transducers pulsed at multiple frequencies

Abstract

Acoustic backscatter systems offer a flexible technique to measure dispersion concentration and particle size, through inversion of the return echo voltage response of pulse-echo signals in the MHz range. This study explores the use of the ultrasound array research platform to measure the suspended particle attenuation constant using acoustic backscatter from glass species, and invert the voltage response to produce concentration profiles. The measurement principle is described and experimentally determined values for the particle attenuation constant are compared to theoretical values from literature. Transducer constants for each probe are determined allowing concentration profiles to be inverted from the voltage profiles, and the limits for determining the attenuation constant are explored.

Experimental validation of acoustic inversions for high concentration profiling of spherical particles, using broadband technology in the Rayleigh regime

“…The UARP is controlled using a custom MATLAB (Mathworks, USA) interface. All raw data was processed in real-time for operator feedback and archived for further offline processing [49].…”