METHOD FOR DETECTING A BLOCKED STATE OF AN ULTRASONIC SENSOR, ULTRASONIC SENSOR DEVICE, AND MOTOR VEHICLE
First Claim
1. A method for detecting a blocked state of an ultrasonic sensor of a motor vehicle, the method comprising:
- sensing an actual value of at least one oscillation parameter of the ultrasonic sensor;
comparing, by an evaluation unit, the actual value sensed with a reference value to detect a blocked state;
detecting a current temperature to which the ultrasonic sensor is exposed by a temperature detecting device; and
determining, by the evaluation unit, the reference value as a function of the current temperature.
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Accused Products
Abstract
The invention relates to a method for detecting a blocked state of an ultrasonic sensor (3) of a motor vehicle (1), wherein an actual value of at least one oscillation parameter (fR) of the ultrasonic sensor (3) is sensed and is compared with a reference value by means of an evaluation unit (4) in order to detect a blocked state, wherein a current temperature (T) to which the ultrasonic sensor (3) is exposed is detected by means of a temperature detecting device (8), and the reference value is determined as a function of the current temperature (T) by means of the evaluation unit (4).
22 Citations
11 Claims
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1. A method for detecting a blocked state of an ultrasonic sensor of a motor vehicle, the method comprising:
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sensing an actual value of at least one oscillation parameter of the ultrasonic sensor; comparing, by an evaluation unit, the actual value sensed with a reference value to detect a blocked state; detecting a current temperature to which the ultrasonic sensor is exposed by a temperature detecting device; and determining, by the evaluation unit, the reference value as a function of the current temperature. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An ultrasonic sensor device for a motor vehicle, comprising:
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at least one ultrasonic sensor; and an evaluation unit for detecting an actual value of at least one oscillation parameter of the ultrasonic sensor, comparing said actual value with a reference value and, depending on the comparison, detecting a blocked state of the ultrasonic sensor, wherein the evaluation unit is designed for determining, during operation, the reference value as a function of a detected current temperature to which the ultrasonic sensor is exposed. - View Dependent Claims (11)
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Specification