Patent ID: 9423292
Filing Date: 2016-08-23
CPC Classification: G01C,G01D,G01H,G01L,G01P

Claim Text:
1. A resonator measurement sensor, comprising a resonator with a vibrating element placed in an oscillating circuit controlled by a closed-loop control, the oscillating circuit supplying an oscillating signal y(t) at a resonance frequency Fp representing the measurement of a physical quantity, and a processing circuit for calculating this resonance frequency, the processing circuit comprising means for conditioning the oscillating signal so as to produce a square-wave signal at the resonance frequency Fp, means for periodically producing a counting time window, at least one counter incremented by the square-wave signal at the resonance frequency during the counting time window, and means for calculating the resonance frequency from the content of the counter, the sensor being characterized in that it furthermore comprises means for calculating a continuity parameter Pc representing the variations in the result of the calculation of the resonance frequency over the course of successive time windows, and means for comparing the parameter Pc with a threshold in order to deduce from this information on the degradation in the precision of the sensor.