Angular velocity detection device
First Claim
1. An angular velocity detection device comprising:
- a vibration body including an outer periphery;
a driver that vibrates the vibration body; and
a detector that detects vibrations generated in the vibration body due to action of an angular velocity and outputs an output signal in accordance with the angular velocity;
whereinthe vibration body includes;
a center base portion fixedly provided at a center of the outer periphery;
four first detection beam sections that extend from the center base portion in parallel or substantially in parallel with corresponding ones of four sides defining the outer periphery, fork into two branches extending in two side directions along each side of the outer periphery, and are connected to each other at four corners of the outer periphery;
four second detection-cum-drive beam sections that extend from the first detection beam sections toward the center base portion side along a respective diagonal line of the outer periphery, and fork into two branches extending in two side directions along the center base portion and the first detection beam sections; and
eight mass bodies connected to both ends of each of the second detection-cum-drive beam sections extending along the first detection beam sections;
whereineach diagonal line extends from one of the four corners of the outer periphery to another one of the four corners of the outer periphery that is opposite to the one of the four corners of the outer periphery;
the driver causes each of the second detection-cum-drive beam sections to perform flexural vibration in a direction perpendicular or substantially perpendicular to the respective diagonal line; and
the vibration body has a square or substantially square shape as a whole when the vibration body is viewed from a direction perpendicular or substantially perpendicular to a plate surface of the vibration body.
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Accused Products
Abstract
An angular velocity detection device vibrates a vibration body and detects vibrations generated by angular velocity. The vibration body includes a center base portion, first detection beam sections extending from the center base section in a T shape and connected to each other at four corners, second detection-cum-drive beam sections extending from the first detection beam sections toward the center base portion side along diagonal lines of the vibration body, and mass bodies connected to both ends of each of the second detection-cum-drive beam portions. The second detection-cum-drive beam sections each perform flexural vibration within a plate surface in a direction perpendicular or substantially perpendicular to the diagonal line of the vibration body.
11 Citations
16 Claims
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1. An angular velocity detection device comprising:
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a vibration body including an outer periphery; a driver that vibrates the vibration body; and a detector that detects vibrations generated in the vibration body due to action of an angular velocity and outputs an output signal in accordance with the angular velocity;
whereinthe vibration body includes; a center base portion fixedly provided at a center of the outer periphery; four first detection beam sections that extend from the center base portion in parallel or substantially in parallel with corresponding ones of four sides defining the outer periphery, fork into two branches extending in two side directions along each side of the outer periphery, and are connected to each other at four corners of the outer periphery; four second detection-cum-drive beam sections that extend from the first detection beam sections toward the center base portion side along a respective diagonal line of the outer periphery, and fork into two branches extending in two side directions along the center base portion and the first detection beam sections; and eight mass bodies connected to both ends of each of the second detection-cum-drive beam sections extending along the first detection beam sections;
whereineach diagonal line extends from one of the four corners of the outer periphery to another one of the four corners of the outer periphery that is opposite to the one of the four corners of the outer periphery; the driver causes each of the second detection-cum-drive beam sections to perform flexural vibration in a direction perpendicular or substantially perpendicular to the respective diagonal line; and the vibration body has a square or substantially square shape as a whole when the vibration body is viewed from a direction perpendicular or substantially perpendicular to a plate surface of the vibration body. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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Specification