Sensor System, Sensor Element, and Method for Monitoring a Closing Mechanism
First Claim
1. A sensor system, comprising:
- an optical pressure sensor having an optical sensor element with a light-guiding element;
a light source disposed for injecting light into said light-guiding element;
a light sensor for sensing light output from said light-guiding element;
a first evaluation unit connected to said light sensor for evaluating the light output from said light-guiding element;
an electrical sensor with an electrode connected to a voltage source; and
a second evaluation unit connected to said electrical sensor for evaluating a voltage signal output by said electrical sensor.
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Accused Products
Abstract
In order to be able to reliably detect when an object is caught between two parts which move in relation to one another in a motor-driven closing mechanism, in particular in an electromotively driven window winder system, provision is made for the sensor system to have an optical pressure sensor as well as an electrical capacitive sensor in addition. The optical pressure sensor comprises a light-guiding element, a light source for injecting light into the light-guiding element and a light sensor for sensing the light which has been output. The electrical sensor comprises an electrode which is connected to a voltage source. Both sensors are each assigned to an evaluation unit for evaluating the respective signal.
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Citations
28 Claims
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1. A sensor system, comprising:
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an optical pressure sensor having an optical sensor element with a light-guiding element; a light source disposed for injecting light into said light-guiding element; a light sensor for sensing light output from said light-guiding element; a first evaluation unit connected to said light sensor for evaluating the light output from said light-guiding element; an electrical sensor with an electrode connected to a voltage source; and a second evaluation unit connected to said electrical sensor for evaluating a voltage signal output by said electrical sensor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
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Specification