Piezoelectric MEMS resonators for density and viscosity sensing in engine oil with diesel fuel

Author

Toledo, J. ; Manzaneque, T. ; Ruiz-Diez, V. ; Kucera, M. ; Pfusterschmied, G. ; Wistrela, E. ; Steindl, W. ; Schmid, U. ; Sanchez-Rojas, J.L.

Author_Institution

Actuators & Sensors Group, Univ. de Castilla-La Mancha, Ciudad Real, Spain

fYear

2015

fDate

21-25 June 2015

Firstpage

436

Lastpage

439

Abstract

This work demonstrates the potential of AlN-based resonators as on-line sensors for monitoring lubricant oil dilution with diesel. Two devices are compared, one actuated in the first extensional in-plane mode and the other in an out-of-plane mode (14-mode). Both devices are designed to feature high quality factor in liquid, and allow discriminating variations in density or viscosity in the medium. Sensor resolutions for these two variables are compared in lubricant oil SAE 2.5W, and the device with the best result (14-mode) was also tested in continuous-flow measurements, showing a resolution of 0.5 ppm of diesel contamination in this oil.

Keywords

lubricating oils; microsensors; petroleum; piezoelectric devices; continuous-flow measurements; density sensing; device extensional in-plane mode; device out-of-plane mode; diesel contamination; diesel fuel; engine oil; lubricant oil dilution monitoring; microelectromechanical system; piezoelectric MEMS resonators; viscosity sensing; Calibration; Density measurement; Logic gates; Q measurement; AlN; Microresonators; density; lubricant oil; oscillator circuits; piezoelectric; rheology; viscosity;

fLanguage

English

Publisher

ieee

Conference_Titel

Solid-State Sensors, Actuators and Microsystems (TRANSDUCERS), 2015 Transducers - 2015 18th International Conference on

Conference_Location

Anchorage, AK

Type

conf

DOI

10.1109/TRANSDUCERS.2015.7180954

Filename

7180954