Operating device for rotation-rate sensor having an electronic apparatus for determining mechanical amplification of deflection oscillatory motion and phase shift of deflection oscillatory motion relative to harmonic drive oscillation of seismic mass

A rotation-rate sensor, comprising:

• an operating device including an electronic apparatus which is configured to determine a mechanical amplification of a deflection oscillatory motion and/or a phase shift of the deflection oscillatory motion relative to a harmonic drive oscillation of a seismic mass by taking into account at least one drive frequency variable, which is stored on a storage apparatus of the operating device or provided to the electronic apparatus, with respect to a characteristic drive frequency of the harmonic drive oscillation of the seismic mass of the rotation-rate sensor and by also taking into account at least one detection frequency variable which is provided by the operating device itself to the operating device, with respect to a characteristic detection frequency of the deflection oscillatory motion, caused by a Coriolis force, of the seismic mass put into the harmonic drive oscillation or with respect to a difference between the characteristic drive frequency and the characteristic detection frequency,
• wherein the electronic apparatus is configured to determine the mechanical amplification G by taking into account an angular drive frequency ωa of the harmonic drive oscillation as the at least one drive frequency variable and by also taking into account an angular frequency difference Δω between the angular drive frequency ωa and an angular detection frequency ωs of the deflection oscillatory motion as the at least one detection frequency variable, according to the following equation:
• G
• =
• K
• (
• 1
• -
• (
• ω
• a
• ω
• a
• ±
• Δω
• )
• 2
• )
• 2
• +
• (
• ω
• a
• Q
• *
• (
• ω
• a
• ±
• Δω
• )
• )
• 2
• ,
• wherein an amplification coefficient K and a quality Q are stored in the storage apparatus of the operating device and/or are calculated by the electronic apparatus.

A method for operating a rotation-rate sensor, comprising:

• determining, while a seismic mass of the rotation-rate sensor is put into a harmonic drive oscillation with a characteristic drive frequency of the harmonic drive oscillation, at least one detection frequency variable with respect to a characteristic detection frequency of a deflection oscillatory motion, caused by a Coriolis force, of the seismic mass or with respect to a difference between the characteristic drive frequency and the characteristic detection frequency;
• and
• determining a mechanical amplification of the deflection oscillatory motion and/or of a phase shift of the deflection oscillatory motion with respect to the harmonic drive oscillation of the seismic mass by taking into account at least one drive frequency variable with respect to the characteristic drive frequency of the harmonic drive oscillation and by also taking into account the at least one determined detection frequency variable,
• wherein, by taking into account the determined mechanical amplification and/or a determined phase shift, and by also taking into account a prespecified target variable with respect to a setpoint amplification factor of a signal path of a capacitive sensor, at least one amplification apparatus in the signal path is set or regulated until an actual amplification factor of the signal path corresponds to the setpoint variable.