Measuring viscosity with nonlinear self-excited microcantilevers

Mouro, J, Tiribilli, B and Paoletti, P ORCID: 0000-0001-6131-0377 (2017) Measuring viscosity with nonlinear self-excited microcantilevers. Applied Physics Letters, 111 (14). 144101-.

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Official URL: https://aip.scitation.org/doi/abs/10.1063/1.499538...

Abstract

A viscosity sensor based on the nonlinear behaviour of a microcantilever embedded in a self-excitation loop with an adjustable phase-shifter is proposed. The self-sustained oscillation frequencies of the cantilever are experimentally and theoretically investigated as functions of the fluid viscosity and of the imposed phase shift of the signal along the self-excitation loop. The sensor performance is validated experimentally using different water-glycerol solutions. In contrast to existing rheological sensors, the proposed platform can be tuned to work in two different modes: a high-sensitivity device whose oscillation frequency changes smoothly with the rheological properties of the fluid or a critical viscosity threshold detector, where, for small changes in fluid viscosity, there is a step change in oscillation frequency. The authors wish to acknowledge the support of EPSRC Grant No. EP/N026799/1 on Self-Tuning Advanced Rheology Tool and of the CNR Short Term Mobility grants 2015 and 2016. The authors also wish to thank Elbatech srl for the support in the design and realization of the self-excitation electronics. The data presented in this paper are freely available at https://doi.org/10.5281/zenodo.825797.

Item Type:	Article
Depositing User:	Symplectic Admin
Date Deposited:	09 May 2018 08:22
Last Modified:	15 Mar 2024 06:50
DOI:	10.1063/1.4995386
Open Access URL:	http://aip.scitation.org/doi/full/10.1063/1.499538...
Related URLs:	Author Publisher
URI:	https://livrepository.liverpool.ac.uk/id/eprint/3019961