Rotation rate sensor

• US 7,316,161 B2
• Filed: 09/25/2002
• Issued: 01/08/2008
• Est. Priority Date: 01/12/2002
• Status: Expired due to Term

• Current Assignee: Robert Bosch GmbH
• Original Assignee: Robert Bosch GmbH
• Inventors: Lang, Christoph, Kuhlmann, Burkhard, Maurer, Dieter, Franz, Jochen, Frey, Jens, Hauer, Joerg, Classen, Johannes, Bauer, Wolfram, Willig, Rainer, Neul, Reinhard, Doering, Christian, Gomez, Udo-Martin, Bischof, Udo
• Primary Examiner(s): Williams; Hezron
• Assistant Examiner(s): BELLAMY, TAMIKO D
• Application Number:
  US10/471,832
• Publication Number:
  US 20040206176A1
• Time in Patent Office: 1,931 Days
• Field of Search: 735/041.2, 735/040.2, 735/10, 735/041.4
• US Class Current: 73/504.12
• CPC Class Codes: G01C 19/5747 each sensing mass being connected to a driving mass, e.g. driving frames

Abstract

A rotation rate sensor having a substrate and a Coriolis element is proposed, the Coriolis element being situated above a surface of a substrate; the Coriolis element being able to be induced to vibrate in parallel to a first axis (X); an excursion of the Coriolis element being detectable, based on a Coriolis force in a second axis (Y), which is provided to be essentially perpendicular to the first axis (X); the first and second axes (X, Y) being provided parallel to the surface of the substrate, wherein force-conveying means are provided, the means being provided to convey a dynamic force effect between the substrate and the Coriolis element.

Claims

1. A rotation rate sensor, comprising:

a substrate;

at least one Coriolis element situated above a surface of the substrate, the at least one Coriolis element being able to be induced to vibrate in parallel to a first axis, wherein;

an excursion of the at least one Coriolis element is detectable based on a Coriolis force in a second axis that is substantially perpendicular to the first axis, and

the first axis and the second axis are parallel to the surface of the substrate; and

electrode structures for generating a dynamic force effect, wherein the dynamic force is directly generated by the electrode structures;

wherein;

the electrode structures include a first electrode substructure and a second electrode substructure,

the first substructure and the second substructure are asymmetrical,

for each of the first substructure and the second substructure at least one cutout of the at least one Coriolis element is provided, and

the at least one cutout has a greater extension in a first cutout region in a direction of the second axis than in a second cutout region.

2. The rotation rate sensor as recited in claim 1, wherein:

the dynamic force effect is between the substrate and the at least one Coriolis element.

3. The rotation rate sensor as recited in claim 1, wherein:

there is a static force effect, in addition to the dynamic force affect, between the substrate and the at least one Coriolis element.

4. The rotation rate sensor as recited in claim 3, wherein:

the static force effect corresponds to a torque with respect to a third axis that is substantially perpendicular to the surface of the substrate.

5. The rotation rate sensor as recited in claim 1, wherein:

the at least one Coriolis element includes a first Coriolis element and a second Coriolis element,

the first Coriolis element and the second Coriolis element are positioned symmetrically to each other, and

the first Coriolis element and the second Coriolis element are mechanically coupled to each other.

6. The rotation rate sensor as recited in claim 3, wherein:

at least one of the dynamic force effect and the static force effect is provided as a function of at most two controlled variables.

7. The rotation rate sensor as recited in claim 6, wherein:

the two controlled variables are electrical dc voltages.

8. The rotation rate sensor as recited in claim 1, further comprising:

a first driving arrangement by which the at least one Coriolis element is able to be induced to vibrate parallel to the first axis; and

a second driving arrangement by which an excursion of the at least one Coriolis element is detectable in the second axis on account of the Coriolis force.