Method and device for analyzing a sensor element
First Claim
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1. A method for analyzing a sensor element which outputs a signal as a function of a measured variable, comprising:
- analyzing the signal of the sensor element in a first analysis operating mode to detect the measured variable; and
analyzing the signal of the sensor element in a second analysis operating mode to detect a characteristic variable of the sensor element which is different from the measured variable, wherein the sensor element is a combustion chamber pressure sensor for detecting a combustion chamber pressure of an internal combustion engine.
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Abstract
A method and a device for analyzing a sensor element are described, which allow a temperature dependence of the sensor element to be considered without an additional temperature sensor in particular. The sensor element outputs a signal as a function of a measured variable. The signal of the sensor element is analyzed in a first analysis operating mode to detect the measured variable. The signal of the sensor element is analyzed in a second analysis operating mode to detect a characteristic variable of the sensor element which is different from the measured variable.
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Citations
8 Claims
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1. A method for analyzing a sensor element which outputs a signal as a function of a measured variable, comprising:
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analyzing the signal of the sensor element in a first analysis operating mode to detect the measured variable; and analyzing the signal of the sensor element in a second analysis operating mode to detect a characteristic variable of the sensor element which is different from the measured variable, wherein the sensor element is a combustion chamber pressure sensor for detecting a combustion chamber pressure of an internal combustion engine. - View Dependent Claims (3)
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2. A method for analyzing a sensor element which outputs a signal as a function of a measured variable, comprising:
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analyzing the signal of the sensor element in a first analysis operating mode to detect the measured variable; and analyzing the signal of the sensor element in a second analysis operating mode to detect a characteristic variable of the sensor element which is different from the measured variable, wherein a changeover between the first analysis operating mode and the second analysis operating mode is performed as a function of at least one controlled variable, wherein a crankshaft angle of an internal combustion engine is the controlled variable.
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4. A method for analyzing a sensor element which outputs a signal as a function of a measured variable, comprising:
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analyzing the signal of the sensor element in a first analysis operating mode to detect the measured variable; and analyzing the signal of the sensor element in a second analysis operating mode to detect a characteristic variable of the sensor element which is different from the measured variable, wherein a frequency of setting the second analysis operating mode is selected as a function of a rate of change of the characteristic variable.
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5. A method for analyzing a sensor element which outputs a signal as a function of a measured variable, comprising:
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analyzing the signal of the sensor element in a first analysis operating mode to detect the measured variable; and analyzing the signal of the sensor element in a second analysis operating mode to detect a characteristic variable of the sensor element which is different from the measured variable, wherein one of a temperature or a capacitance is analyzed as the characteristic variable of the sensor element. - View Dependent Claims (6, 7)
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8. A method for analyzing a sensor element which outputs a signal as a function of a measured variable, comprising:
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analyzing the signal of the sensor element in a first analysis operating mode to detect the measured variable; analyzing the signal of the sensor element in a second analysis operating mode to detect a characteristic variable of the sensor element which is different from the measured variable; and incorporating the sensor element into an impedance transformer circuit or into a charge amplifier circuit to detect the measured variable.
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Specification