METHOD OF DIAGNOSING MACHINE ASSEMBLIES BASED ON OPERATING OIL PARAMETERS Russian patent published in 2013 - IPC G01N15/06 G01R27/26 

FIELD: physics.

SUBSTANCE: result is achieved by determining change in sensor capacitance depending on the degree and quality of contamination of operating oil. The change is detected using a frequency technique. Also, the degree and quality of contamination of the operating oil are determined from deviation of the frequency of pulses of a tunable generator from a reference value obtained for fresh oil. Comparison is carried out based on an arbitrary pulse indicator defined by the formula where K₁ is the frequency division coefficient of the reference frequency generator; T₁ is the oscillation period of the reference frequency generator; K₂ is the frequency division coefficient of the tunable frequency generator; T₂ is the oscillation period of the tunable frequency generator.

EFFECT: invention enables detection of specific impurities in the analysed oil, increases accuracy and reliability of evaluating the technical condition of machines.

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