Electro-mechanical resonance loop
First Claim
1. A controller for controlling a sensor having a resonating mass, comprising:
- a signal conditioning chain responsive to a sensor signal from the sensor and operative to extract a digitized sensor signal from the sensor signal;
a frequency/phase controller responsive to the digitized sensor signal and operative to generate a frequency/phase-controlled signal that is locked in phase with the digitized sensor signal;
an amplitude controller responsive to the digitized sensor signal and operative to generate an amplitude-adjusted signal; and
a modulator/phase-shifter responsive to the amplitude-adjusted signal and operative to modulate and shift a phase of the amplitude-adjusted signal to thereby generate a modulated signal,wherein the resonating mass is configured to be excited based on the modulated signal, to thereby form a closed resonance loop for controlling an oscillation amplitude of the resonating mass.
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Accused Products
Abstract
The invention relates to a controller, and more particularly, to systems, devices and methods of controlling a sensor having a resonating mass. The controller includes: an analog-to-digital converter (ADC) unit for extracting a digitized sensor signal from the sensor signal; a phase controller for generating, based on the digitized sensor signal, a phase-controlled signal that is locked in phase with the digitized sensor signal; an amplitude controller for applying a gain to the digitized sensor signal to thereby generate an amplitude-adjusted signal; a modulator for modulating the amplitude-adjusted signal to thereby generate a modulated signal; and a phase shifter for shifting the phase of the modulated signal by 90 degrees. The output signal from the phase shifter is amplified and input to the drive for exciting the resonating mass, to thereby form a closed resonance loop for controlling the oscillation amplitude of the resonating mass.
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Citations
19 Claims
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1. A controller for controlling a sensor having a resonating mass, comprising:
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a signal conditioning chain responsive to a sensor signal from the sensor and operative to extract a digitized sensor signal from the sensor signal; a frequency/phase controller responsive to the digitized sensor signal and operative to generate a frequency/phase-controlled signal that is locked in phase with the digitized sensor signal; an amplitude controller responsive to the digitized sensor signal and operative to generate an amplitude-adjusted signal; and a modulator/phase-shifter responsive to the amplitude-adjusted signal and operative to modulate and shift a phase of the amplitude-adjusted signal to thereby generate a modulated signal, wherein the resonating mass is configured to be excited based on the modulated signal, to thereby form a closed resonance loop for controlling an oscillation amplitude of the resonating mass. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A method of controlling a sensor having a resonating mass, comprising:
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converting a sensor signal into a digital format to thereby generate a digitized sensor signal, the sensor signal indicating at least one of a displacement and a velocity of the resonating mass; controlling a frequency and a phase of an internal clock reference to thereby lock a system clock signal in phase to the digitized sensor signal; adjusting an amplitude of a signal derived from the digitized sensor signal to generate an adjusted amplitude signal; shifting a phase of the adjusted amplitude signal by a predetermined angle; modulating the phase-shifted signal; and based on the modulated signal, generating a signal for driving the resonating mass. - View Dependent Claims (15, 16, 17, 18, 19)
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Specification