Angular velocity detection circuit, angular velocity detection apparatus, and failure determination system
First Claim
1. An angular velocity detection circuit that is connected to a resonator for making excited vibration on the basis of a drive signal and detects an angular velocity, the circuit comprising:
- a self-vibration component extraction unit that receives, from the resonator, a detection signal including an angular velocity component based on a Coriolis force and a self-vibration component based on the excited vibration and extracts the self-vibration component from the detection signal;
a direct-current conversion unit including an integration unit that integrates an output signal of the self-vibration component extraction unit; and
a temperature characteristic compensation unit that compensates for a variation due to a temperature in an output signal of the direct-current conversion unit.
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Abstract
An angular velocity detection circuit is connected to a resonator for making excited vibration on the basis of a drive signal and detects an angular velocity. The angular velocity detection circuit includes: a self-vibration component extraction unit that receives, from the resonator, a detection signal including an angular velocity component based on a Coriolis force and a self-vibration component based on the excited vibration and extracts the self-vibration component from the detection signal; a direct-current conversion unit including an integration unit that integrates an output signal of the self-vibration component extraction unit; and a temperature characteristic compensation unit that compensates for a variation due to a temperature in an output signal of the direct-current conversion unit.
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Citations
8 Claims
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1. An angular velocity detection circuit that is connected to a resonator for making excited vibration on the basis of a drive signal and detects an angular velocity, the circuit comprising:
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a self-vibration component extraction unit that receives, from the resonator, a detection signal including an angular velocity component based on a Coriolis force and a self-vibration component based on the excited vibration and extracts the self-vibration component from the detection signal; a direct-current conversion unit including an integration unit that integrates an output signal of the self-vibration component extraction unit; and a temperature characteristic compensation unit that compensates for a variation due to a temperature in an output signal of the direct-current conversion unit. - View Dependent Claims (2, 3, 4, 5, 6)
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7. An angular velocity detection apparatus comprising:
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a resonator, wherein the resonator makes excited vibration on the basis of a drive signal, obtains a Coriolis force caused by a rotation movement and the excited vibration, and outputs a detection signal including an angular velocity component based on the Coriolis force and a self-vibration component based on the excited vibration; and an angular velocity detection circuit that is connected to the resonator and detects an angular velocity, the angular velocity detection circuit including; a self-vibration component extraction unit that receives the detection signal and extracts the self-vibration component from the detection signal; a direct-current conversion unit including an integration unit that integrates an output signal of the self-vibration component extraction unit; and a temperature characteristic compensation unit that compensates for a variation due to a temperature in an output signal of the direct-current conversion unit. - View Dependent Claims (8)
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Specification