Vibration type angular rate sensor
First Claim
1. A vibration type angular rate sensor comprising:
- a vibrator which vibrates along a reference direction at a fixed frequency in response to a driving signal, receives an angular velocity given to the vibrator, and vibrates along a detecting direction perpendicular to the reference direction in accordance with the angular velocity;
a monitoring signal generator which generates a monitoring signal having a waveform of the vibration of the vibrator along the reference direction;
a clock signal generator which generates, from the monitoring signal, a first clock signal and a second clock signal having a frequency identical with that of the first clock signal in a manner that a level of the first clock signal is changed at a time differing from that in the second clock signal, the first clock signal being used to maintain the vibration of the vibrator along the reference direction) and an angular velocity detector which detects the angular velocity from a waveform of the vibration of the vibrator along the detecting direction by using the second clock signal and outputs the detected angular velocity as an angular rate given to the vibrator.
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Accused Products
Abstract
An angular rate sensor has a vibrator vibrating along a reference direction at a fixed frequency in response to a driving signal, and vibrating along a detecting direction perpendicular to the reference direction in accordance with an angular velocity given to the vibrator. A monitoring signal generator generates a monitoring signal having a waveform of the vibrator vibration along the reference direction. A clock signal generator generates, from the monitoring signal, a first clock signal and a second clock signal having a frequency identical with that of the first clock signal and a level change occurring at a time differing from that in the second clock signal. The first clock signal is used to maintain the vibrator vibration along the reference direction. An angular velocity detector detects the angular velocity from a waveform of the vibrator vibration along the detecting direction by using the second clock signal.
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Citations
10 Claims
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1. A vibration type angular rate sensor comprising:
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a vibrator which vibrates along a reference direction at a fixed frequency in response to a driving signal, receives an angular velocity given to the vibrator, and vibrates along a detecting direction perpendicular to the reference direction in accordance with the angular velocity;
a monitoring signal generator which generates a monitoring signal having a waveform of the vibration of the vibrator along the reference direction;
a clock signal generator which generates, from the monitoring signal, a first clock signal and a second clock signal having a frequency identical with that of the first clock signal in a manner that a level of the first clock signal is changed at a time differing from that in the second clock signal, the first clock signal being used to maintain the vibration of the vibrator along the reference direction) and an angular velocity detector which detects the angular velocity from a waveform of the vibration of the vibrator along the detecting direction by using the second clock signal and outputs the detected angular velocity as an angular rate given to the vibrator. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification