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The Fundamentals of Particle Size Analysis by Transmission Fluctuation Spectrometry.
Author(s) -
Shen Jianqi,
Riebel Ulrich
Publication year - 2003
Publication title -
particle and particle systems characterization
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.877
H-Index - 56
eISSN - 1521-4117
pISSN - 0934-0866
DOI - 10.1002/ppsc.200390014
Subject(s) - signal (programming language) , transmission (telecommunications) , gaussian , optics , particle (ecology) , beam (structure) , particle size , gaussian beam , physics , signal processing , spatial filter , temporal resolution , computational physics , materials science , chemistry , electronic engineering , digital signal processing , computer science , telecommunications , oceanography , engineering , quantum mechanics , programming language , geology
A transmission signal measured on a flowing suspension of particles with a high spatial and temporal resolution shows significant fluctuations, which contain the complete information on particle size distribution and particle concentration. In Parts 1 and 2, the basic properties of signal fluctuations were studied for temporal averaging by a gliding time window and for spatial averaging by a circular beam of uniform intensity. However, the experimental implementation of such conditions is difficult. Now, the theory is extended for Gaussian beams of variable diameter and averaging by signal filtering in the frequency domain. This provides the basis for an experimental implementation by transmission of a laser beam and analog signal processing by an array of low pass filters.