Rotation-type decoupled MEMS gyroscope
First Claim
1. A MEMS gyroscope, comprising:
- a drive body disposed on a substrate to be movable about a first axis, the first axis being a rotation axis line parallel to a surface of the substrate;
a sensing body disposed on the substrate to be movable about a second axis, the second axis being a rotation axis line normal to the surface of the substrate;
a medium body disposed on the substrate, the medium body being capable of moving together with the drive body about the first axis and moving together with the sensing body about the second axis;
a driving electrode for driving the drive body in order for the drive body to vibrate in a certain range about the first axis; and
a sensing electrode for measuring a displacement of the sensing body rotating about the second axis by a Coriolis force generated by an application of an angular velocity while the drive body vibrates by the driving electrode.
1 Assignment
0 Petitions
Accused Products
Abstract
A rotation-type decoupled MEMS gyroscope including a drive body movable about the X-axis, a sensing body movable about the Z-axis, a medium body moving together with the drive body about the X-axis and the sensing body about the Z-axis. The drive body is fixed on a substrate by a first torsion spring torsion-deformed about the X-axis, and the medium body is connected to the drive body by a first bending spring bending-deformed about the Z-axis. The sensing body is connected to the medium body by a second torsion spring torsion-deformed about the X-axis and fixed to the substrate by a second bending spring bending-deformed about the Z-axis. If angular velocity is applied relative to the Y-axis while the drive body vibrates in a certain range about the X-axis by a driving electrode, the sensing body rotates about the Z-axis by the Coriolis force and a sensing electrode senses the rotation.
-
Citations
14 Claims
-
1. A MEMS gyroscope, comprising:
-
a drive body disposed on a substrate to be movable about a first axis, the first axis being a rotation axis line parallel to a surface of the substrate;
a sensing body disposed on the substrate to be movable about a second axis, the second axis being a rotation axis line normal to the surface of the substrate;
a medium body disposed on the substrate, the medium body being capable of moving together with the drive body about the first axis and moving together with the sensing body about the second axis;
a driving electrode for driving the drive body in order for the drive body to vibrate in a certain range about the first axis; and
a sensing electrode for measuring a displacement of the sensing body rotating about the second axis by a Coriolis force generated by an application of an angular velocity while the drive body vibrates by the driving electrode. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
-
Specification