ANTI-PINCH SENSOR AND EVALUATION CIRCUIT
First Claim
1. An anti-pinch sensor for detecting an obstacle in the path of an actuating element of a motor vehicle, the anti-pinch sensor having a sensor body, the sensor body comprising:
- a first measuring electrode arranged within the sensor body that is configured to generate a first external electric field relative to a counter electrode; and
a second measuring electrode that is electrically separated from the first measuring electrode and that is arranged within the sensor body and substantially adjacent to the first measuring electrode that is configured to generate a second external electric field relative to the counter electrode,wherein the first or second measuring electrodes are formed such that the first external electric field has a broader range than the second external electric field.
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Accused Products
Abstract
An anti-pinch sensor is provided for detecting an obstacle in the path of a regulating element of a motor vehicle, the sensor can include a sensor body, a first measuring electrode that can be arranged in the sensor body and can be used to produce a first outer electrical field in relation to a counter-electrode, and an electrically separated second measuring electrode that can be arranged adjacent to the first measuring electrode in the sensor body and can be used to produce a second outer electrical field in relation to the counter electrode. The measuring electrodes can be formed in such a way that the first outer electrical field has a larger range than the second outer electrical field. An evaluation circuit is also provided that is suitable for evaluating an anti-pinch sensor. The detection reliability of such a clamping sensor is not affected by dirt or water on a surface thereof.
39 Citations
27 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 having a sensor body, the sensor body comprising:
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a first measuring electrode arranged within the sensor body that is configured to generate a first external electric field relative to a counter electrode; and a second measuring electrode that is electrically separated from the first measuring electrode and that is arranged within the sensor body and substantially adjacent to the first measuring electrode that is configured to generate a second external electric field relative to the counter electrode, wherein the first or second measuring electrodes are formed such that the first external electric field has a broader range than the second external electric field. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 27)
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15. An evaluation circuit for an anti-pinch sensor comprising:
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a measuring potential output component configured to output a predefined measuring potential to at least a first or second measuring electrode; a capacitance drift detection component configured to detect a mutual drift of measurement capacitances between the first or second measuring electrode and a counter electrode; and an evaluation component configured to output a detection signal as a function of the drift signal, wherein the anti-pinch sensor includes a sensor body comprising; the first measuring electrode, which is arranged within the sensor body, the first measuring electrode being configured to generate a first external electric field relative to a counter electrode; and the second measuring electrode, which is electrically separated from the first measuring electrode and is arranged within the sensor body and substantially adjacent to the first measuring electrode, the second measuring electrode being configured to generate a second external electric field relative to the counter electrode, wherein the first or second measuring electrodes are formed such that the first external electric field has a broader range than the second external electric field. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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26. A module comprising an anti-pinch sensor and an evaluation circuit connected to the anti-pinch sensor, the anti-pinch sensor comprising:
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a measuring potential output component configured to output a predefined measuring potential to at least a first or second measuring electrode; a capacitance drift detection component configured to detect a mutual drift of measurement capacitances between the first or second measuring electrode and a counter electrode; and an evaluation component configured to output a detection signal as a function of the drift signal, wherein the first measuring electrode, which is arranged within a sensor body, is configured to generate a first external electric field relative to a counter electrode; and wherein the second measuring electrode, which is electrically separated from the first measuring electrode, is arranged within the sensor body and substantially adjacent to the first measuring electrode, the second measuring electrode being configured to generate a second external electric field relative to the counter electrode, and wherein the first or second measuring electrodes are formed such that the first external electric field has a broader range than the second external electric field.
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Specification