CIRCUIT AND METHOD FOR EVALUATING MEASUREMENT SIGNALS AND SENSOR SYSTEM FOR CAPACITIVELY DETECTING OBSTACLES

A circuit for evaluating measurement signals of at least one sensor with a control circuit. A control signal having a first frequency is generated by a control section of the control circuit, and the control signal is applied to the sensor. An electronic evaluation unit is provided for generating an...

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Bibliographic Details
Main Authors WIEST, Thomas, KELSCH, Manuel
Format Patent
LanguageEnglish
French
German
Published 21.06.2017
Subjects
BASIC ELECTRONIC CIRCUITRY
ELECTRICITY
PULSE TECHNIQUE
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Summary:A circuit for evaluating measurement signals of at least one sensor with a control circuit. A control signal having a first frequency is generated by a control section of the control circuit, and the control signal is applied to the sensor. An electronic evaluation unit is provided for generating an evaluation signal originating from a measurement signal generated by the sensor. The electronic evaluation unit generates an opposing signal having the first frequency and a modifiable phase angle and superposes the opposing signal and the evaluation signal. The signal resulting from the superposition of the opposing signal and the evaluation signal is fed to a synchronous demodulator of the electronic evaluation unit.
Bibliography:Application Number: EP20150750694