Granted Patent B2

US 12,618,697 · App. 17/650,554 · Granted May 5, 2026

Inventors: Frank Drautz (Kirchentellinsfurt, DE); Michael Schiebold (Chemnitz, DE); Paolo Minotti (Tuebingen, DE)

Assignee: ROBERT BOSCH GMBH

G01D18/006G01D18/008

Abstract

Claims (27)

1 . A method for carrying out a diagnosis of a sensor system, comprising the following steps:

(i) ascertaining a plurality of processing specifications of test signals and/or of a characteristic physical variable and/or a respective change of a test signal and/or the characteristic physical variable, as a function of at least one part-specific property of the sensor system; and

(ii) carrying out a subsequent diagnosis of a sensor element of the sensor system, using the plurality of processing specifications ascertained in (i),

wherein a part-specific correlation factor is ascertained for each sensor element of the sensor system which is a function of a respective part-specific processing specification,

wherein the sensor system comprises a micromechanical rotation rate sensor having a negative frequency split, the diagnosis being carried out using a part-specific correlation factor determined for the negative frequency split design.

2 . The method as recited in claim 1 , further comprising:

carrying out a recalibration of the sensor element of the sensor system as a function of a result of the diagnosis.

3 . The method as recited in claim 2 , wherein the diagnosis and/or the recalibration of the sensor element is carried out at defined points in time.

4 . The method as recited in claim 1 , wherein feedback of the sensor system is provided to a user as a function of a result of the diagnosis.

5 . The method as recited in claim 1 , wherein a constant term of the processing specification takes on the following form:

C 0 =CF( pp )·β

where:

β is a constant which is not part-specific, but is empirically ascertained based on a large number of identical sensor elements.

6 . The method as recited in claim 1 , wherein the processing specification is changed over a service life of the sensor system.

7 . A method for manufacturing a sensor system, comprising the following steps:

a) ascertaining, in a part-specific manner, a mathematical relationship between a test signal and a response signal of a sensor element of the sensor system to the test signal; and

b) implementing the mathematical relationship ascertained in step a) in the sensor system after a final trim of the sensor element,

wherein the sensor system comprises a micromechanical rotation rate sensor having a negative frequency split, the diagnosis being carried out using a part-specific correlation factor determined for the negative frequency split design.

8 . The method as recited in claim 7 , wherein parameters of the ascertained mathematical relationship are calculated in the part-specific manner and stored in the sensor system.

9 . The method as recited in claim 7 , wherein the mathematical relationship is at least partially implemented in software and/or at least partially in hardware.

10 . The method as recited in claim 8 , wherein the mathematical relationship is stored by programming a programmable chip.

11 . The method as recited in claim 7 , wherein the mathematical relationship is changed over a service life of the sensor system.

12 . The method as recited in claim 7 , wherein the mathematical relationship for a defined sensor type encompasses an approximation according to defined physical relationships.

13 . A non-transitory computer-readable data medium on which is stored a computer program for carrying out a diagnosis of an electronic sensor system, the computer program, when executed by the electronic sensor system, causing the electronic sensor system to perform the following steps:

(i) ascertaining a plurality of processing specifications of test signals and/or of a characteristic physical variable and/or a respective change of a test signal and/or the characteristic physical variable, as a function of at least one part-specific property of the sensor system; and

(ii) carrying out a subsequent diagnosis of a sensor element of the sensor system, using the plurality of processing specifications ascertained in (i),

wherein the sensor system comprises a micromechanical rotation rate sensor having a negative frequency split, the diagnosis being carried out using a part-specific correlation factor determined for the negative frequency split design.

Assignments (1)

Priority Claims (1)

Continuity (1)

References Cited (16)