Device for operating a wiper
First Claim
1. In a device for operating a windshield wiper, the device including a sensor for detecting the degree of moistness of a windshield, an evaluator for receiving a signal from the sensor, and a control unit, which receives a control signal from the evaluator, for operating the windshield wiper if a difference between a reference value and values derived from the sensor signal exceeds a predetermined threshold value, the evaluator comprising:
- a detector stage for determining whether the sensor signal or the values derived therefrom lie within a normal total range (UGR, OGR) in which an equilibrium level (RP) of the sensor signal can be adjusted by the device of the evaluator; and
,a selector stage for switching to a predetermined base interval when the detector stage determines that the sensor signal or the values derived therefrom lie outside of the normal range.
1 Assignment
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Accused Products
Abstract
A device for operating a windshield wiper, with the device including a sensor for detecting the degree of moistness of a windshield, an evaluator for receiving a signal from the sensor, and a control unit which receives a control signal from the evaluator for operating the windshield wiper if a difference between a reference value and values derived from the sensor signal exceeds a predetermined threshold value. The evaluator includes a detector stage for determining whether the sensor signal or the values derived therefrom lie within a normal range (UGR, OGR), and a selector stage for switching to a predetermined base interval mode of operating of the wipes when the detector stage determines that the sensor signal or the values derived therefrom lie outside of the normal range.
9 Citations
18 Claims
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1. In a device for operating a windshield wiper, the device including a sensor for detecting the degree of moistness of a windshield, an evaluator for receiving a signal from the sensor, and a control unit, which receives a control signal from the evaluator, for operating the windshield wiper if a difference between a reference value and values derived from the sensor signal exceeds a predetermined threshold value, the evaluator comprising:
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a detector stage for determining whether the sensor signal or the values derived therefrom lie within a normal total range (UGR, OGR) in which an equilibrium level (RP) of the sensor signal can be adjusted by the device of the evaluator; and
,a selector stage for switching to a predetermined base interval when the detector stage determines that the sensor signal or the values derived therefrom lie outside of the normal range. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. In a device for operating a windshield wiper, the device including a sensor for detecting the degree of moistness of a windshield, an evaluator for receiving a signal from the sensor, and a control unit which receives a control signal from the evaluator for operating the windshield wiper if a difference between a reference value and values derived from the sensor signal exceeds a predetermined threshold value, the evaluator comprising:
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a detector stage for determining whether the sensor signal or the values derived therefrom lie within a normal range (UGR, OGR), with the detector stage comprising a comparator for determining whether the sensor signal or the values derived therefrom are less than a lower threshold value or greater than an upper threshold value, the lower and upper threshold values defining the normal range; and
,a selector stage for switching to a predetermined base interval when the detector stage determines that the sensor signal or the values derived therefrom lie outside of the normal range, and, wherein the detector stage recognizes an abnormal sensor signal when the sensor signal level cannot be brought into the normal range by selection of signal level amplification. - View Dependent Claims (14, 15, 16, 17)
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18. In a device for operating a windshield wiper, the device including a sensor for detecting the degree of moistness of a windshield, an evaluator for receiving a signal from the sensor, and a control unit which receives a control signal from the evaluator for operating the windshield wiper when a difference between a reference value and values derived from the sensor signal exceeds a predetermined threshold value, the improvement wherein the evaluator comprises:
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a detector stage for determining whether the sensor signal or the values derived therefrom lie within a total normal operating range (UGR, OGR) in which a resting level (RP) for the sensor signal normally is located; and
,a selector stage for switching from said control signal to a control signal which results in a predetermined base interval mode of operation of the windshield wiper when the detector stage determines that the sensor signal or the values derived therefrom lie outside of the normal range.
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Specification