Patent ID: 11913808
Assignee: SILICON MICROGRAVITY LIMITED
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 18:
19. A method of inertial sensing using a resonator assembly comprising at least one resonator, the resonator assembly having a first mode of vibration having a first resonant frequency and a second mode of vibration having a second resonant frequency when an input measurand is equal to a first value, comprising the steps of:
driving the resonator assembly with a drive signal and a pump signal;
sensing a first amplitude of oscillation of a resonator of the resonator assembly at the first resonant frequency and a second amplitude of oscillation of a resonator of the resonator assembly at the second resonant frequency;
wherein the pump signal has a frequency substantially equal to a difference between the first resonant frequency and the second resonant frequency, the pump signal adjusting a ratio between the sensed first and second amplitudes of oscillation so that the amplitude ratio is within a predetermined amplitude ratio range over an expected range of input measurand values; and
providing an output signal based on changes in the ratio of sensed amplitudes of oscillation resulting from changes in the input measurand.