Vibrator for a vibrating gyroscope, vibrating gyroscope using the vibrator, and electronic apparatus using the vibrating gyroscope
First Claim
1. A vibrator for a vibrating gyroscope comprising:
- a piezoelectric vibratable body; and
a first detection electrode and a second detection electrode formed on the piezoelectric body for outputting a signal containing an angular velocity, wherein at least one groove having a predetermined depth is provided in the piezoelectric vibrating body between the first detection electrode and the second detection electrode.
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Abstract
In order to provide a vibrating gyroscope in which variations in the angular-velocity detection sensitivity are not likely to occur even when sharp temperature changes occur, a vibrator for a vibrating gyroscope includes, on one main surface, a first detection electrode and a second detection electrode, which output a signal containing an angular-velocity signal, wherein a groove having a predetermined depth is provided between the first detection electrode and the second detection electrode. As for a vibrator for a vibrating gyroscope of the present invention, since the difference between the resonance frequency and the anti-resonance frequency in a bending vibration mode in the driving direction becomes closer to the difference between the resonance frequency and the anti-resonance frequency in a bending vibration mode in the detection direction, variations in the angular-velocity detection sensitivity are not likely to occur even when sharp temperature changes are given.
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Citations
29 Claims
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1. A vibrator for a vibrating gyroscope comprising:
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a piezoelectric vibratable body; and
a first detection electrode and a second detection electrode formed on the piezoelectric body for outputting a signal containing an angular velocity, wherein at least one groove having a predetermined depth is provided in the piezoelectric vibrating body between the first detection electrode and the second detection electrode. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29)
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Specification