Title :
A new technique for measuring viscosity of liquid with pico-liter volume based on Doppler shift by photothermal effects
Author_Institution :
Dept. of Electron.,Inf. & Commun. Eng., Osaka Sangyo Univ., Daito, Japan
Abstract :
This paper proposes a new technique for quickly measuring the viscosity of liquid with pico-liter volume based on Doppler shift by elastic wave in liquid induced by periodical photothermal expansion. Our sensing head for the sample liquids is composed of two spherical lensed fibers so that the volume of the sample liquid is no more than the order of pico-liter. The time resolved frequency of the Doppler shift is measured, and the viscosity is estimated from the shape of the curve. The experimental result was demonstrated, and the estimation of the “relative viscosity” by using a seismic system is attempted.
Keywords :
Doppler shift; elastic waves; fibres; liquids; photothermal effects; viscosity measurement; Doppler shift; elastic wave; liquid viscosity measurement; photothermal effects; photothermal expansion; pico-liter volume; relative viscosity; seismic system; spherical lensed fibers; Acoustic beams; Laser beams; Laser excitation; Liquids; Optical fiber communication; Optical fiber sensors; Viscosity; Doppler shift; photothermal expansion; spherical lensed fiber; viscosity measurement;
Conference_Titel :
Instrumentation and Measurement Technology Conference (I2MTC), 2012 IEEE International
Conference_Location :
Graz
Print_ISBN :
978-1-4577-1773-4
DOI :
10.1109/I2MTC.2012.6229154
