Abstract: A sensor system for protecting movable objects, in particular motor-driven doors or flaps, having at least one capacitive sensor and having at least one control unit. The control unit is designed to generate a transmission signal for the capacitive sensor and to evaluate a first reception signal therefrom. At least one further electrode is provided, wherein the capacitive sensor and the further electrode are movable relative to one another. The control unit has an evaluation arrangement which evaluates a second reception signal from the further electrode, and the evaluation arrangement is designed to derive an item of information relating to the distance between the capacitive sensor and the further electrode from the second reception signal.

Abstract: A sensor system for the capacitive detection of obstacles, having a capacitive sensor with conductive elements and a control circuit connected thereto. The control circuit has a bridge circuit, and a first end of the bridge branch is connected to a conductive element of the sensor positioned upstream in the direction of detection and a second end of the bridge branch is connected to a conductive element of the sensor positioned downstream in the direction of detection. A control signal is generated by a control section of the control circuit and the sum of impedances of the bridge circuit connected to the first end of the bridge branch is less than the sum of impedances of the bridge circuit connected to the second end of the bridge branch. An electronic evaluation unit is provided to evaluate a voltage difference between the first and second ends of the bridge branch.