Method and Device for Setting the Dynamic Range of a Rotation Rate Sensor

• US 20160187156A1
• Filed: 07/09/2014
• Published: 06/30/2016
• Est. Priority Date: 08/07/2013
• Status: Abandoned Application

• Current Assignee: Robert Bosch GmbH
• Original Assignee: Robert Bosch GmbH
• Inventors: Strobel, Jens, Northemann, Thomas
• Application Number:
  US14/910,409
• Publication Number:
  US 20160187156A1
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: G01C 19/5776 Signal processing not specific to any of the devices covered by groups G01C19/5607 - G01C19/5719
• CPC Class Codes: G01C 25/005 initial alignment, calibration or starting-up of inertial devices

Abstract

A method for setting the dynamic range of a rotation rate sensor includes exciting a mass of the rotation rate sensor mounted such that the mass is configured to vibrate linearly using a drive signal. The drive signal is provided at a resonant frequency of the mass. The method further includes influencing the vibration by using an amplification signal. The amplification signal is provided at a multiple of the resonant frequency in order to set a dynamic range.

Claims

1. A method for setting the dynamic range of a rotation rate sensor, the method comprising:

exciting a mass of the rotation rate sensor mounted such that the mass is configured to vibrate linearly using a drive signal, the drive signal being provided at a resonant frequency of the mass; and

influencing the vibration using an amplification signal, the amplification signal being provided at a multiple of the resonant frequency in order to set a dynamic range.

2. The method as claimed in claim 1, wherein the amplification signal is provided with a phase offset in relation to the drive signal.

3. The method as claimed in claim 2, wherein the influencing of the vibration includes a first dynamic stage, wherein the dynamic range is set using a first phase offset and,

following chronologically thereon, at least one further dynamic stage, wherein the dynamic range is set using at least one further phase and the first phase offset differs from the further phase offset.

4. The method as claimed in claim 1, wherein the amplification signal is provided with a variable amplitude in order to influence the dynamic range.

5. The method as claimed in claim 1, wherein the amplification signal is provided at twice the resonant frequency.

6. The method as claimed in claim 1, wherein the drive signal is provided in the high-voltage range, and the amplification signal is provided in the low-voltage range.

7. The method as claimed in claim 1, wherein the drive signal is provided as an AC signal oscillating sinusoidally about a voltage value.

8. The method as claimed in claim 1, wherein the amplification signal is provided as a DC signal fluctuating sinusoidally about a voltage value.

9. The method as claimed in claim 1, wherein the drive signal and the amplification signal are provided on a common electrode.

10. The method as claimed in claim 1, wherein the drive signal is provided on at least one drive electrode and the amplification signal is provided on at least one parallel electrode.

13. A computer program product with program code for carrying out the method as claimed in one of claim 1 when the program product is executed on a device.

11. A device for setting the dynamic range of a rotation rate sensor, comprising:

a first module configured to excite a mass of the rotation rate sensor mounted such that the mass is configured to vibrate by using a drive signal, wherein the first module is configured to provide the drive signal at a resonant frequency of the mass; and

a second module configured to influence the mass by using an amplification signal, wherein the second module is configured to provide the amplification signal at a multiple of the resonant frequency in order to set the dynamic range.

12. A rotation rate sensor, comprising:

at least one mass mounted such that the mass is configured to vibrate, wherein the mass can be excited by electrostatic forces;

at least one electrode configured to excite the mass;

a first module configured to excite the mass by using a drive signal, wherein first module is configured to provide the drive signal on the electrode at a resonant frequency of the mass; and

a second module configured to influence the mass by using an amplification signal, wherein the second module is configured to provide the amplification signal on the electrode at a multiple of the resonant frequency in order to set a dynamic range of the rotation rate sensor.