Micro-gyroscope for detecting motions
First Claim
1. A micro-gyroscope for detecting motions relative to a Z axis and at least one of an X and Y axis as a multi-dimensional sensor, comprising:
- a substrate;
a plurality of anchors including a central anchor, the plurality of anchors being fixed on the substrate;
a plurality of oscillating sample masses, the plurality of sample masses being disposed uniformly around the central anchor and driven radially relative to the central anchor;
anchor springs disposed between the anchors and the plurality of oscillating sample masses, the anchor spring attaching the plurality of oscillating sample masses to the substrate and allowing the plurality of oscillating sample masses to be deflected both radially in a X-Y plane and out of the X-Y plane;
drive elements, the drive elements oscillating the plurality of oscillating sample masses in the X-Y plane to generate Coriolis forces when the substrate is rotated;
sensor elements disposed below the plurality of oscillating sample masses, the sensor elements detecting deflections of the plurality of oscillating sample masses due to the Coriolis forces;
sensor mass disposed on one of the plurality of oscillating sample masses by means of sensor springs, the sensor springs allowing deflection of the sensor mass within the plane of the plurality of oscillating sample masses and orthogonal to the radial drive direction of these sample masses; and
an elastic gimbal mount disposed between the central anchor and the anchor springs.
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Accused Products
Abstract
The invention relates to a micro-gyroscope for detecting motions relative to an X and/or Y and Z axis, particularly as a 3D, 5D, or 6D sensor. Sample masses are disposed uniformly about an anchor and can be driven radially relative to the central anchor. Anchor springs are disposed to attach the sample masses to a substrate, and these sample masses can be deflected both radially within and out of the X-Y plane. A sensor mass is disposed on one of the sample masses by means of sensor springs, and the sensor springs allow deflection of the sensor mass within the plane of the sample mass, and orthogonal to the radial drive direction of the sample masses. Drive elements oscillate these sample masses in the X-Y plane, and sensor elements captures the defection of the sample masses due to the Coriolis forces generated when the substrate is rotated.
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Citations
16 Claims
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1. A micro-gyroscope for detecting motions relative to a Z axis and at least one of an X and Y axis as a multi-dimensional sensor, comprising:
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a substrate; a plurality of anchors including a central anchor, the plurality of anchors being fixed on the substrate; a plurality of oscillating sample masses, the plurality of sample masses being disposed uniformly around the central anchor and driven radially relative to the central anchor; anchor springs disposed between the anchors and the plurality of oscillating sample masses, the anchor spring attaching the plurality of oscillating sample masses to the substrate and allowing the plurality of oscillating sample masses to be deflected both radially in a X-Y plane and out of the X-Y plane; drive elements, the drive elements oscillating the plurality of oscillating sample masses in the X-Y plane to generate Coriolis forces when the substrate is rotated; sensor elements disposed below the plurality of oscillating sample masses, the sensor elements detecting deflections of the plurality of oscillating sample masses due to the Coriolis forces; sensor mass disposed on one of the plurality of oscillating sample masses by means of sensor springs, the sensor springs allowing deflection of the sensor mass within the plane of the plurality of oscillating sample masses and orthogonal to the radial drive direction of these sample masses; and an elastic gimbal mount disposed between the central anchor and the anchor springs. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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Specification