Operating method for a coriolis gyro, and evaluation/control elecrronics which are suitable for this purpose
First Claim
1. An operating method for a Coriolis gyro in which digital read signals are produced, which represent a measure of the instantaneous amplitudes/frequencies of the stimulation oscillation/read oscillation of the resonator of the Coriolis gyro, and the resonator has force signals applied to it, with the force signals being controlled as a function of the digital read signals such that the stimulation oscillation/read oscillation assume specific amplitudes/frequencies, the force signals are produced from quantized output signals from a pulse modulator which is fed with digital stimulation/compensation signals which are derived from the digital read signals characterized in that the quantized output signals are pulse sequences at a constant frequency.
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Abstract
An operating method for a Coriolis gyro. Digital read signals are produced that represent a measure of the instantaneous amplitudes/frequencies of the stimulation oscillation/read oscillation of the gyro resonator. Force signals are applied to the resonator. The force signals are controlled as a function of the digital read signals so that the stimulation oscillation/read oscillation assume specific amplitudes/frequencies. The force signals are produced from quantized output signals from a pulse modulator. The modulator is fed with digital stimulation/compensation signals derived from the digital read signals.
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Citations
8 Claims
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1. An operating method for a Coriolis gyro in which
digital read signals are produced, which represent a measure of the instantaneous amplitudes/frequencies of the stimulation oscillation/read oscillation of the resonator of the Coriolis gyro, and the resonator has force signals applied to it, with the force signals being controlled as a function of the digital read signals such that the stimulation oscillation/read oscillation assume specific amplitudes/frequencies, the force signals are produced from quantized output signals from a pulse modulator which is fed with digital stimulation/compensation signals which are derived from the digital read signals characterized in that the quantized output signals are pulse sequences at a constant frequency.
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7. Evaluation/control electronics for use in a Coriolis gyro, having:
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a unit for production of digital read signals which represent a measure of the instantaneous amplitudes/frequencies of the stimulation oscillation/read oscillation of the resonator of the Coriolis gyro, at least one control loop by means of which force signals are produced as a function of the digital read signals and are passed to the resonator, with the force signals being controlled such that the stimulation oscillation/read oscillation assume specific amplitudes/frequencies, a pulse modulator which is a part of the control loop and which is fed with digital stimulation/compensation signals which are derived from the digital read signals, in which case the force signals can be produced from quantized output signals from the pulse modulator characterized in that the quantized output signals are pulse sequences at a constant frequency.
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8. A pulse modulator for conversion of a complex input signal to a pulsed signal, characterized by
a subtraction stage which produces a control error signal from the difference between the complex input signal and a feedback signal; -
a signal conversion stage, which converts the control error signal to a control signal;
a first multiplication stage, which multiplies the control signal by a complex mixing signal oscillating at the frequency ω
0, and thus produces at least one of the real part and imaginary part of a control signal up-mixed by ω
0;
a quantization stage, which quantizes at least one of the real part and imaginary part of the control signal up-mixed by ω
0 and thus produces the pulsed signal;
a feedback unit, which uses the pulsed signal to produce the feedback signal for the subtraction stage.
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Specification