Vibration-sensing gyro
First Claim
1. A vibration-sensing gyro comprising:
- a twin-fork vibration sensing element comprising;
a first tuning fork comprising first and second tines and a base, a width of the base of the first tuning fork being less than the width of the first tuning fork;
a second tuning fork comprising first and second tines and a base, a width of the base of the second tuning fork being less than the width of the second tuning fork;
the first tuning fork being joined to the second tuning fork by the bases of the first and second tuning forks;
a first excitation means on the first tuning fork, the excitation device vibrating the first tuning fork along a first axis;
a first detection means on the second tuning fork, the first detection means detecting vibrations in the second tuning fork in an axis orthogonal to the first axis, which vibrations in the second tuning fork are propagated from vibrations in the first tuning fork.
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Accused Products
Abstract
A vibration-sensing gyro composed of a light alloy such as duralumin includes a base and a first pair of tines projecting parallel to each other from the base. Piezoelectric elements are mounted on the root of the side faces of the first pair of tines to excite the first pair of tines along an X axis. The vibrations of the first pair of tines along the X axis are then propagated to a second pair of tines to vibrate the second pair of tines along the X axis. Piezoelectric elements are mounted on the root of the upper and the lower faces of the second pair of tines to detect vibrations of the second pair of tines along an Y axis. When the second pair of tines receives the Coriolis force based on an angular velocity ω around a Z axis and vibrates along the Y axis, the vibrations along the Y axis are detected as electric signals (alternating current voltages) by piezoelectric effects of the piezoelectric elements.
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Citations
10 Claims
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1. A vibration-sensing gyro comprising:
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a twin-fork vibration sensing element comprising; a first tuning fork comprising first and second tines and a base, a width of the base of the first tuning fork being less than the width of the first tuning fork; a second tuning fork comprising first and second tines and a base, a width of the base of the second tuning fork being less than the width of the second tuning fork; the first tuning fork being joined to the second tuning fork by the bases of the first and second tuning forks; a first excitation means on the first tuning fork, the excitation device vibrating the first tuning fork along a first axis; a first detection means on the second tuning fork, the first detection means detecting vibrations in the second tuning fork in an axis orthogonal to the first axis, which vibrations in the second tuning fork are propagated from vibrations in the first tuning fork. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification