Method for diagnosing a sensor system in a part-specific manner
AssigneeRobert Bosch GmbH
InventorsFrank Drautz, Michael Schiebold, Paolo Minotti
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Abstract
A method for carrying out a diagnosis of a sensor system. The method including: (i) ascertaining a processing specification of a test signal and/or of a characteristic physical variable and/or its respective change 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 processing specification ascertained in (i).
Claims13
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.
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.
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.
Dependencies are inferred from the claim text.