Title :
Torsional piezoelectric fiber for viscosity measurement of Newtonian fluids
Author :
Pan, Chengliang ; Liao, Wei-Hsin
Author_Institution :
Dept. of Mech. & Autom. Eng., Chinese Univ. of Hong Kong, Shatin, China
Abstract :
A new torsional piezoelectric vibrating resonator was proposed for measuring the viscosity of Newtonian fluids. It consists of a simple and compact structure as a piezoceramic fiber with parallel helical electrodes around outer surface. Principle of the torsional vibration, theory of the fluid coupling, and methods for the viscosity measurement were presented. A prototype of resonator was fabricated and tested in standard viscosity oils with viscosity × density values from 20 to 1500 Pa·s·kg·m-3. Experimental results showed a good agreement with theoretical analysis, especially in high viscosity range. With low material and fabrication cost, miniaturized torsional piezoelectric fiber will provide a competitive way for the portable viscosity measurement or in situ monitoring of viscous liquids, such as lubrication oil and fuel in constrained space.
Keywords :
non-Newtonian fluids; piezoelectricity; vibrations; viscometers; viscosity; viscosity measurement; Newtonian fluids; compact structure; fabrication cost; fluid coupling theory; lubrication oil; miniaturized torsional piezoelectric fiber; parallel helical electrodes; portable viscosity measurement; standard viscosity oils; torsional piezoelectric fiber; torsional piezoelectric vibrating resonator; viscous liquids; Electrodes; Optical fiber theory; Resonant frequency; Surface impedance; Vibrations; Viscosity; Viscometer; fluid; piezoelectric fiber; torsional vibration;
Conference_Titel :
Mechatronics and Automation (ICMA), 2012 International Conference on
Conference_Location :
Chengdu
Print_ISBN :
978-1-4673-1275-2
DOI :
10.1109/ICMA.2012.6283216