%0 Journal Article
%T Characterization of Lubricating Oil Using Ultrasound
%A Higuti
%A Ricardo Tokio
%A Furukawa
%A Celso Massatoshi
%A Adamowski
%A Julio Cezar
%J Journal of the Brazilian Society of Mechanical Sciences
%D 2001
%I Scientific Electronic Library Online
%R 10.1590/S0100-73862001000400006
%X this paper presents an ultrasonic method to measure small concentrations of water in lubricating oil. it uses an ultrasonic measurement cell composed by a piezoceramic emitter (5 and 10 mhz), and a large aperture pvdf receiver that eliminates diffraction effects. the propagation velocity, attenuation coefficient and density of several samples of water-in-oil emulsion were measured. the concentrations of water of the samples were in the range of 0 to 5% in volume, and the results showed that these low concentrations can be discriminated within a resolution of 0.2% in the studied range, using the measurement of the propagation velocity.
%K ultrasound
%K liquid characterization
%K lubricating oil.
%U http://www.scielo.br/scielo.php?script=sci_abstract&pid=S0100-73862001000400006&lng=en&nrm=iso&tlng=en