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Proceedings Paper

A liquid properties sensor utilizing pressure waves
Author(s): Hannes Antlinger; Roman Beigelbeck; Stefan Clara; Samir Cerimovic; Franz Keplinger; Bernhard Jakoby
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Paper Abstract

Miniaturized sensors for fluid viscosity often utilize shear vibrations and thus measure a thin film of fluid. To probe the bulk of a sample, pressure waves can be utilized instead. Then, however, the so-called longitudinal viscosity is determined, which can be equally useful for condition monitoring applications. Moreover, this parameter has not yet been investigated in detail such that material data are scarce. In this paper, we report on a prototype setup utilizing standing acoustic pressure waves in a small sample chamber. The impact of these resonances on the impedance of a PZT transducer is modeled and investigated experimentally. It is demonstrated that with this setup sound velocity and the longitudinal viscosity of liquid samples can be investigated.

Paper Details

Date Published: 5 May 2011
PDF: 11 pages
Proc. SPIE 8066, Smart Sensors, Actuators, and MEMS V, 80661Z (5 May 2011); doi: 10.1117/12.886357
Show Author Affiliations
Hannes Antlinger, Johannes Kepler Univ. Linz (Austria)
Roman Beigelbeck, Institute for Integrated Sensor Systems (Austria)
Stefan Clara, Johannes Kepler Univ. Linz (Austria)
Samir Cerimovic, Vienna Univ. of Technology (Austria)
Franz Keplinger, Vienna Univ. of Technology (Austria)
Bernhard Jakoby, Johannes Kepler Univ. Linz (Austria)

Published in SPIE Proceedings Vol. 8066:
Smart Sensors, Actuators, and MEMS V
Ulrich Schmid; José Luis Sánchez-Rojas; Monika Leester-Schaedel, Editor(s)

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