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  • Patent (Full)

    Final published version, 1 MB, PDF-document

    22/10/12

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Machine fluid sensor and method

Research output: Patent

Published
  • L Matsiev (Inventor)
  • James Bennett (Inventor)
  • Daniel Pinkas (Inventor)
  • Mikhail Spitkovsky (Inventor)
  • Oleg Kolosov (Inventor)
  • Shenheng Guan (Inventor)
  • M Uhrich (Inventor)
  • Cameron Dales (Inventor)
  • John Varni (Inventor)
  • Blake Walker (Inventor)
  • Vladimir Gammer (Inventor)
  • David Padowitz (Inventor)
  • Eric Low (Inventor)
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Patent numberUS 7,043,969 B2
<mark>Original language</mark>English

Abstract

A sensor for sensing one or more properties of a vehicle fluid has a tuning fork resonator adapted to contact the fluid. The tuning fork resonator comprises two tines and is operable to oscillate so that the two tines move in opposite phase at a frequency of less than 1 MHz while contacting the fluid to generate a resonator response indicative of one or lllore properties of the fluid. In another aspect, a sensor includes a substrate and a flexural resonator on the substrate and adapted to contact the fluid. Circuitry for operation of the resonator is on the substrate. The resonator is adapted to receive an input signal and to oscillate while contacting the fluid to generate a resonator response indicative of one or more properties of the fluid. One suitable application for the invention is monitoring the condition of a vehicle engine oil.