Sensor function for controlling at a variable transmission frequency for the purpose of detecting contamination
First Claim
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1. A method for functional testing of a mechanical vibration sensor, comprising:
- generating a vibration signal on a vibration component of the vibration sensor with the aid of a periodic excitation signal wherein the frequency of the periodic excitation signal is varied; and
analyzing a post-vibration process of the vibration component of the vibration sensor once the excitation signal has been switched off, wherein the method is implemented during the normal operation of the vibration sensor within a framework of a distance measuring routine.
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Abstract
In a method for functional testing of a mechanical vibration sensor, a vibration signal is generated on the vibration component of the vibration sensor with the aid of a periodic excitation signal, the frequency of which excitation signal is varied, and a post-vibration process of the vibration component of the vibration sensor is analyzed once the excitation signal has been switched off.
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Citations
14 Claims
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1. A method for functional testing of a mechanical vibration sensor, comprising:
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generating a vibration signal on a vibration component of the vibration sensor with the aid of a periodic excitation signal wherein the frequency of the periodic excitation signal is varied; and analyzing a post-vibration process of the vibration component of the vibration sensor once the excitation signal has been switched off, wherein the method is implemented during the normal operation of the vibration sensor within a framework of a distance measuring routine. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A measuring system for a motor vehicle having functional testing, comprising:
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at least one ultrasonic sensor unit; and signal generator configured to generate a periodic function test signal as signal for a vibration component of the sensor unit, wherein the function test signal is variable in its frequency, wherein the function test is performed during the normal operation of the sensor unit within a framework of a distance measuring routine. - View Dependent Claims (8, 9, 10, 11, 12, 13)
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14. A distance measuring system for obstacle detection, comprising:
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an ultrasonic transmitter; an ultrasonic receiver; an excitation unit configured to achieve periodic excitation of the transmitter, wherein variable frequencies are used for the periodic excitation of the transmitter during a function test; and an evaluation unit configured to evaluate the signal from the receiver once the excitation unit has been switched off, wherein the function test is performed during the normal operation of the distance measuring system within a framework of a distance measuring routine.
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Specification