Tri-axis accelerometer having a single proof mass and fully differential output signals
First Claim
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1. A tri-axis accelerometer, comprising:
- a proof mass;
a plurality of anchor points arranged in at least two pairs opposite one another along at least two axial directions that are perpendicular to one another;
a plurality of spring units to connect the proof mass to the plurality of anchor points, the spring units each including a respective pair of identical springs; and
a respective sensing unit arranged on each of the springs.
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Abstract
A tri-axis accelerometer includes a proof mass, at least four anchor points arranged in at least two opposite pairs, a first pair of anchor points being arranged opposite one another along a first axis, a second pair of anchor points being arranged opposite one another along a second axis, the first axis and the second axis being perpendicular to one another, and at least four spring units to connect the proof mass to the at least four anchor points, the spring units each including a pair of identical springs, each spring including a sensing unit.
39 Citations
23 Claims
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1. A tri-axis accelerometer, comprising:
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a proof mass; a plurality of anchor points arranged in at least two pairs opposite one another along at least two axial directions that are perpendicular to one another; a plurality of spring units to connect the proof mass to the plurality of anchor points, the spring units each including a respective pair of identical springs; and a respective sensing unit arranged on each of the springs. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A tri-axis accelerometer, comprising:
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a proof mass; a plurality of anchor points arranged in at least two pairs opposite one another along at least two axial directions that are perpendicular to one another; and a plurality of spring units to connect the proof mass to the plurality of anchor points, wherein the spring units each; extends alongside at least one external edge of, and external to, the proof mass; and includes a pair of identical springs, each spring including a sensing unit.
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15. A tri-axis accelerometer, comprising:
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a proof mass; a plurality of anchor points arranged in at least two pairs opposite one another along at least two axial directions that are perpendicular to one another; a plurality of spring units to connect the proof mass to the plurality of anchor points, the spring units each including a respective pair of identical springs; and for each of the springs units, at least one respective sensing unit arranged on at least one of the identical springs of the spring unit. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23)
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Specification