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US 10,704,908 B1Granted
Yaw rate gyroscope robust to linear and angular acceleration
AssigneeInvenSense, Inc.
InventorsLuca Coronato, Giacomo Gafforelli, Jaakko Ruohio
Life of this patent
Estimating the term…
Abstract
A gyroscope includes four drive masses and four sense masses. Each drive mass is adjacent to two other drive masses and opposite the fourth drive mass, and each sense mass is adjacent to two other sense masses and opposite the fourth sense mass. Each drive mass may oscillate in a manner that is perpendicular to its adjacent drive mass and parallel and anti-phase to its opposite mass. The sense motion of the each sense mass may be coupled in a manner that prevents motion due to linear acceleration or angular acceleration.
Claims8
A gyroscope, comprising:
- four drive masses, wherein each of the four drive masses oscillate in a first plane, wherein a first drive mass is located adjacent to a second drive mass and a fourth drive mass, and opposite a third drive mass, wherein the second drive mass is located adjacent to the first drive mass and the third drive mass, and opposite the fourth drive mass, wherein the third drive mass is located adjacent to the second drive mass and the fourth drive mass, and opposite the first drive mass, and wherein the fourth drive mass is located adjacent to the third drive mass and the first drive mass and opposite the second drive mass;
- a plurality of drive coupling links, wherein the plurality of drive coupling links cause the first drive mass and the third drive mass to oscillate in parallel and in anti-phase, and wherein the plurality of drive coupling links cause the second drive mass and the fourth drive mass to oscillate in parallel and anti-phase, and wherein the oscillations of the first drive mass and the third drive mass are perpendicular to the oscillations of the second drive mass and the fourth drive mass;
- four sense masses, wherein each of the four sense masses is associated with a respective one of the four drive masses, wherein each of the four sense masses moves in a sense axis in response to a Coriolis force caused by the rotation of the gyroscope, and wherein the sense axis for each of the four sense masses is perpendicular to the oscillation of the associated respective drive mass and the axis of rotation of the gyroscope;
- a plurality of Coriolis masses, wherein each Coriolis mass is driven by at least one of the four drive masses, and wherein each Coriolis mass causes at least one of the four sense masses to move in response to the Coriolis force;
- and
- a plurality of sense coupling links, wherein the plurality of sense coupling links cause a first sense mass and a third sense mass to oscillate in parallel and in anti-phase in response to the Coriolis force, and wherein the plurality of sense coupling links cause a second sense mass and a fourth sense mass to oscillate in parallel and anti-phase in response to the Coriolis force, and wherein the oscillations of the first sense mass and the third sense mass are perpendicular to the oscillations of the second sense mass and the fourth sense mass.
3 more elements
A gyroscope, comprising:
- four drive masses, wherein each of the four drive masses oscillate in a first plane, wherein a first drive mass is located adjacent to a second drive mass and a fourth drive mass, and opposite a third drive mass, wherein the second drive mass is located adjacent to the first drive mass and the third drive mass, and opposite the fourth drive mass, wherein the third drive mass is located adjacent to the second drive mass and the fourth drive mass, and opposite the first drive mass, and wherein the fourth drive mass is located adjacent to the third drive mass and the first drive mass and opposite the second drive mass;
- a plurality of drive coupling links, wherein the plurality of drive coupling links prevent the four drive masses from moving in response to a linear acceleration or angular acceleration;
- four sense masses, wherein each of the four sense masses is associated with a respective one of the four drive masses, wherein each of the four sense masses moves in a sense axis in response to a Coriolis force caused by the rotation of the gyroscope, and wherein the sense axis for each of the four sense masses is perpendicular to the oscillation of the associated respective drive mass and the axis of rotation of the gyroscope;
- a plurality of Coriolis masses, wherein each Coriolis mass is driven by at least one of the four drive masses, and wherein each Coriolis mass causes at least one of the four sense masses to move in response to the Coriolis force;
- and
- a plurality of sense coupling links, wherein the plurality of sense coupling links prevent the four sense masses from moving in response to a linear acceleration or angular acceleration.
3 more elements
Dependencies are inferred from the claim text.