Viscosity sensor utilizing a piezoelectric thickness shear sandwich resonator
| Autor: | Martin Gröschl, Branka Devcic-Kuhar, H. Nowotny, Felix Trampler, P. Kostal, R. Thalhammer, Stefan Braun, Ewald Benes |
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| Rok vydání: | 2008 |
| Předmět: |
Materials science
Acoustics and Ultrasonics business.industry Resonance Quartz crystal microbalance Piezoelectricity Physics::Fluid Dynamics Shear (sheet metal) Resonator Viscosity Optics Newtonian fluid Electrical and Electronic Engineering Composite material business Instrumentation Longitudinal wave |
| Zdroj: | IEEE transactions on ultrasonics, ferroelectrics, and frequency control. 45(5) |
| ISSN: | 0885-3010 |
| Popis: | This paper describes a novel quartz crystal sensor for measurement of the density-viscosity product of Newtonian liquids. The sensor element consists of two piano-convex AT-cut quartz crystals vibrating in a thickness-shear mode with the liquid sample in between. This special set-up allows suppression of disturbing resonances in the liquid layer. Such resonances are generated in the common single-plate arrangements due to compressional waves caused by spurious out-of-plane displacements of the shear vibrating finite plate. The primary measurands of the sensor are the fundamental resonance frequency and the associated resonance Q-value, which are influenced by the viscously entrained liquid contacting the quartz surface. The sensor allows the measurement of samples with viscosities from almost zero (air!) up to 200 cP with a sample volume of 130 /spl mu/l. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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