Gyroscope structure and gyroscope
First Claim
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1. A microelectromechanical gyroscope structure, comprising:
- a first pair of drive structures comprising a first drive structure and a second drive structure, wherein said first drive structure is coupled to a first seismic mass and the second drive structure is coupled to a second seismic mass;
a second pair of drive structures comprising a third drive structure and a fourth drive structure, wherein the third drive structure is coupled to a third seismic mass and the fourth drive structure is coupled to a fourth seismic mass,sense structures connected to the first, second, third, and fourth seismic masses;
a central drive coupling spring structure connected to all four drive structures,wherein each drive structure includes a transducer configured to induce primary oscillation of the corresponding seismic mass,wherein each drive structure is coupled to its respective seismic mass by a first spring structure that allows for the coupled seismic mass two degrees of freedom along a plane of oscillation,wherein the drive structures of at least one pair of the first and second seismic masses are coupled to oscillate in linear primary oscillation aligned to a common axis of primary oscillation, wherein an axis of primary oscillation of the first pair of drive structures and an axis of primary oscillation of the second pair of drive structures extend orthogonally along the plane of oscillation, andwherein the central drive coupling spring structure is configured to force the primary oscillation of opposite pairs of drive structures to anti-phase mode.
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Abstract
A gyroscope structure with a specific arrangement of drive and sense structures and coupling spring structures, which allows orthogonally directed motions of larger scale drive and sense structures in a very limited surface area.
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Citations
10 Claims
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1. A microelectromechanical gyroscope structure, comprising:
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a first pair of drive structures comprising a first drive structure and a second drive structure, wherein said first drive structure is coupled to a first seismic mass and the second drive structure is coupled to a second seismic mass; a second pair of drive structures comprising a third drive structure and a fourth drive structure, wherein the third drive structure is coupled to a third seismic mass and the fourth drive structure is coupled to a fourth seismic mass, sense structures connected to the first, second, third, and fourth seismic masses; a central drive coupling spring structure connected to all four drive structures, wherein each drive structure includes a transducer configured to induce primary oscillation of the corresponding seismic mass, wherein each drive structure is coupled to its respective seismic mass by a first spring structure that allows for the coupled seismic mass two degrees of freedom along a plane of oscillation, wherein the drive structures of at least one pair of the first and second seismic masses are coupled to oscillate in linear primary oscillation aligned to a common axis of primary oscillation, wherein an axis of primary oscillation of the first pair of drive structures and an axis of primary oscillation of the second pair of drive structures extend orthogonally along the plane of oscillation, and wherein the central drive coupling spring structure is configured to force the primary oscillation of opposite pairs of drive structures to anti-phase mode. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A microelectromechanical gyroscope, comprising:
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an electrical circuit;
anda microelectromechanical gyroscope structure, wherein the microelectromechanical gyroscope comprises; a first pair of drive structures comprising a first drive structure and a second drive structure, wherein said first drive structure is coupled to a first seismic mass and the second drive structure is coupled to a second seismic mass; a second pair of drive structures comprising a third drive structure and a fourth drive structure, wherein the third drive structure is coupled to a third seismic mass and the fourth drive structure is coupled to a fourth seismic mass, sense structures connected to the first, second, third, and fourth seismic masses; a central drive coupling spring structure connected to all four drive structures, wherein each drive structure includes a transducer configured to induce primary oscillation of the corresponding seismic mass, wherein each drive structure is coupled to its respective seismic mass by a first spring structure that allows for the coupled seismic mass two degrees of freedom along a plane of oscillation, wherein the drive structures of at least one pair of the first and second seismic masses are coupled to oscillate in linear primary oscillation aligned to a common axis of primary oscillation, wherein an axis of primary oscillation of the first pair of drive structures and an axis of primary oscillation of the second pair of drive structures extend orthogonally along the plane of oscillation, and wherein the central drive coupling spring structure is configured to force the linear primary oscillation of opposite pairs of drive structures to anti-phase mode.
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Specification