Method and ultrasonic sensor device for operating an ultrasonic sensor of a vehicle using reduced diagnostics in the measurement mode of the ultrasonic sensor

摘要

The present invention relates to a method of operating an ultrasonic sensor (4) of a vehicle (1), wherein an acoustic transducer element (11) of the ultrasonic sensor (4) is excited with a predetermined excitation signal, the excitation signal having a predetermined current amplitude and the electrical test voltage U at the acoustic transducer element 11 due to the excitation signal is measured, the diagnosis of the ultrasonic sensor 4 is performed based on the test voltage U, and the ultrasonic sensor 4 is Excited with an excitation signal in the measurement mode for transmission of a signal, an electrical test voltage U is measured during transmission, a reduced diagnosis is performed based on the electrical test voltage U, and the ultrasonic sensor 4 is a Depending on the result, it will continue to operate in measurement mode or in diagnostic mode for a complete diagnosis.