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Title: Acoustic particle acceleration sensors

Abstract

A crossed dipole array provides a directional receiving capability in a relatively small sensor package and is therefore very attractive for many applications in acoustics. Particle velocity measurements on two axes perpendicular to each other are required to provide the dipole signals. These can be obtained directly using particle velocity sensors or via simple transfer functions using acceleration and displacement sensors. Also, the derivative of the acoustic pressure with respect to space provides a signal proportional to the particle acceleration and gives rise to the pressure gradient sensor. Each of these sensors has strengths and drawbacks depending on the frequency regime of interest, the noise background, and whether a point or a line configuration of dipole sensors is desired. In this paper, the performance of acceleration sensors is addressed using a sensor concept developed at DREA. These sensors exploit bending stresses in a cantilever beam of piezoelectric material to obtain wide bandwidth and high sensitivity. Models which predict the acceleration sensitivity, pressure sensitivity, and natural frequency for this type of sensor are described. Experimental results obtained using several different versions of these sensors are presented and compared with theory. The predicted performance of acceleration sensors are compared with that ofmore » pressure gradient arrays and particle velocity sensors. {copyright} {ital 1996 American Institute of Physics.}« less

Authors:
 [1];  [2]
  1. Franklin Scientific Services (work performed while Mr. Franklin was employed by Defence Research Establishment Atlantic)
  2. Defence Research Establishment Atlantic, P.O. Box 1012, Dartmouth, B2Y 3Z7 (CANADA)
Publication Date:
OSTI Identifier:
288382
Report Number(s):
CONF-9509298-
Journal ID: APCPCS; ISSN 0094-243X; TRN: 9615M0125
Resource Type:
Journal Article
Journal Name:
AIP Conference Proceedings
Additional Journal Information:
Journal Volume: 368; Journal Issue: 1; Conference: Acoustic velocity sensor focused workshop, Mystic, CT (United States), 12-13 Sep 1995; Other Information: PBD: Apr 1996
Country of Publication:
United States
Language:
English
Subject:
44 INSTRUMENTATION, INCLUDING NUCLEAR AND PARTICLE DETECTORS; ACCELEROMETERS; ACOUSTIC MEASUREMENTS; ACCELERATION; UNDERWATER; PRESSURE GRADIENTS; SENSITIVITY; NOISE; PIEZOELECTRIC MATERIALS; SENSORS; ARRAYS

Citation Formats

Franklin, J B, and Barry, P J. Acoustic particle acceleration sensors. United States: N. p., 1996. Web. doi:10.1063/1.50335.
Franklin, J B, & Barry, P J. Acoustic particle acceleration sensors. United States. doi:10.1063/1.50335.
Franklin, J B, and Barry, P J. Mon . "Acoustic particle acceleration sensors". United States. doi:10.1063/1.50335.
@article{osti_288382,
title = {Acoustic particle acceleration sensors},
author = {Franklin, J B and Barry, P J},
abstractNote = {A crossed dipole array provides a directional receiving capability in a relatively small sensor package and is therefore very attractive for many applications in acoustics. Particle velocity measurements on two axes perpendicular to each other are required to provide the dipole signals. These can be obtained directly using particle velocity sensors or via simple transfer functions using acceleration and displacement sensors. Also, the derivative of the acoustic pressure with respect to space provides a signal proportional to the particle acceleration and gives rise to the pressure gradient sensor. Each of these sensors has strengths and drawbacks depending on the frequency regime of interest, the noise background, and whether a point or a line configuration of dipole sensors is desired. In this paper, the performance of acceleration sensors is addressed using a sensor concept developed at DREA. These sensors exploit bending stresses in a cantilever beam of piezoelectric material to obtain wide bandwidth and high sensitivity. Models which predict the acceleration sensitivity, pressure sensitivity, and natural frequency for this type of sensor are described. Experimental results obtained using several different versions of these sensors are presented and compared with theory. The predicted performance of acceleration sensors are compared with that of pressure gradient arrays and particle velocity sensors. {copyright} {ital 1996 American Institute of Physics.}},
doi = {10.1063/1.50335},
journal = {AIP Conference Proceedings},
number = 1,
volume = 368,
place = {United States},
year = {1996},
month = {4}
}