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Abstract
Many industrial processes involve particles in a carrier
uid and it
is often of interest to noninvasively monitor the size of these particles.
The aim of this paper is to develop a theoretical model of multiple
particle-wall impact vibrations that can be used to recover the parti-
cle size from experimental data. These vibrations have been measured by an ultrasonic transducer attached to the exterior of a vessel con-
taining a stirred particle laden
uid. A linear systems model is derived
for the response of the piezoelectric ultrasonic transducer which has
a single matching layer. The acceleration power spectrum of these
vibrations has been shown experimentally to contain information on
the size of the impacting particle. In particular, the frequency of the
main spectral lobe is inversely proportional to the particle size. We
present a theoretical model that agrees with this empirically observed
phenomenon. The theoretical model is then used to simulate multi-
ple particle-wall impacts, with each particle impacting at a randomly
chosen location. A set of theoretical vibration spectra arising from
multiple particle-wall impacts are integrated and compared to the ex-
perimental data. The ability of this approach to distinguish between
dierent particle sizes is clearly shown.
Original language | English |
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Pages (from-to) | 1034-1041 |
Number of pages | 8 |
Journal | IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control |
Volume | 56 |
Issue number | 5 |
DOIs | |
Publication status | Published - May 2009 |
Keywords
- flow measurement
- impact
- particle size measurement
- piezoelectric transducers
- ultrasonic effects
- ultrasonic transducers
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Dive into the research topics of 'Theoretical analysis of ultrasonic vibration spectra from multiple particle-plate impacts'. Together they form a unique fingerprint.Projects
- 1 Finished
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PGII: Generation, Detection & Analysis of Optimally Coded Ultrasonic Waveforms
Gachagan, A. (Principal Investigator), Hayward, G. (Co-investigator), Mulholland, A. (Co-investigator) & Pierce, G. (Co-investigator)
EPSRC (Engineering and Physical Sciences Research Council)
9/06/08 → 9/09/12
Project: Research