Method for calibrating at least one sensor
AssigneeHella GmbH & Co. KGaA
InventorsBastian Kanning, Klaas Hauke Baumgartel
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Abstract
In a method for calibrating at least one sensor, wherein the sensor includes at least one piezoelectric element with at least one electrode, and wherein at least one electrode is embodied as a measurement electrode, it is provided as essential to the invention that an electrical excitation voltage is applied to at least one further electrode of the piezoelectric element, embodied as a calibration electrode, to create a mechanical deformation of the piezoelectric element, that the voltage induced by the deformation of the piezoelectric element is captured with at least one measurement electrode, and that the applied excitation voltage and captured voltage are compared.
Claims9
A method for calibrating at least one sensors, wherein the sensor includes only one piezoelectric element with at least one electrode, and wherein at least one electrode is embodied as a measurement electrode, wherein the method comprises:
- applying an electrical excitation voltage to at least one further electrode of the only one piezoelectric element embodied as a calibration electrode, generating a mechanical deformation of the piezoelectric element,
- capturing a voltage induced by the deformation of the piezoelectric element with at least one measurement electrode,
- comparing the applied electrical excitation voltage and the captured voltage,
- calculating an electrical field formed between the calibration electrode and the measurement electrode, and
- the calculation of the electrical field is included in in calculating a calibration factor.
Dependencies are inferred from the claim text.