Anti-pinch sensor
First Claim
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1. An anti-pinch sensor for detecting an obstacle in the path of an actuating element of a motor vehicle, the anti-pinch sensor comprising:
- a sensing electrode configured to generate an external electric field with respect to a counter electrode;
a pressure sensor decoupled from the sensing electrode and configured to detect a mechanical pressure; and
a shielding electrode formed as a driven shield wherein the sensing electrode, the pressure sensor, or the shielding electrodes are arranged in a sensor body of the anti-pinch sensor.
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Abstract
An anti-pinch sensor (10,13,40,45) with an associated evaluation circuit (33,48) is disclosed, which is suitable in particular for recognizing an obstacle in the way of an actuating element (e.g., 9) of a motor vehicle (1). The anti-pinch sensor (10,13,40,45) comprises a sensor body, which contains a sensing electrode (17), for generating an external electric field with respect to a counter-electrode (25), and a pressure sensor (34,34′) decoupled from the sensing electrode (17), for detecting a mechanical pressure.
16 Citations
22 Claims
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1. An anti-pinch sensor for detecting an obstacle in the path of an actuating element of a motor vehicle, the anti-pinch sensor comprising:
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a sensing electrode configured to generate an external electric field with respect to a counter electrode; a pressure sensor decoupled from the sensing electrode and configured to detect a mechanical pressure; and a shielding electrode formed as a driven shield wherein the sensing electrode, the pressure sensor, or the shielding electrodes are arranged in a sensor body of the anti-pinch sensor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A component, comprising:
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an anti-pinch sensor with a sensor body, the sensor body comprising a sensing electrode configured to generate an external electric field with respect to a counter electrode, and a pressure sensor decoupled from the sensing electrode and configured to detect a mechanical pressure; and an evaluation circuit comprising; a measurement potential output device configured to output a measurement potential to a sensing electrode; a capacitance detection device configured to detect a measurement capacitance formed by a counter electrode and a sensing electrode; a capacitance evaluation device configured to evaluate a change in the detected measurement capacitance; a sensor evaluation device configured to independently detect and evaluate signals from a pressure sensor; and an output component configured to output a detection signal as a function of a change over time in the measurement capacitance and configured to output a detection signal as a function of the evaluated signal of the pressure sensor.
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22. Use of an anti-pinch sensor in a motor vehicle, the anti-pinch sensor having a sensor body comprising a sensing electrode configured to generate an external electric field with respect to a counter electrode, and a pressure sensor decoupled from the sensing electrode and configured to detect a mechanical pressure, wherein the grounded body of the motor vehicle is used as the counter electrode.
Specification