Method for determining a functional state of an ultrasound sensor by means of a transfer function of the ultrasound sensor, ultrasound sensor device and motor vehicle

摘要

The invention relates to a method for determining a functional state of an ultrasonic sensor (5a) of an ultrasonic sensor device (5) for a motor vehicle (1), which is used for emitting an ultrasonic signal (8) into an environment (4) of the motor vehicle (1) and / or for receiving an echo signal (9) of the ultrasound signal (8) is formed, wherein an electrical test signal (P) is generated, which is applied to the ultrasound sensor (5a), wherein at least one of the electrical test signal (P) influenced electrical characteristic (K) of Ultrasound sensor (5a) is evaluated and depending on a transfer function (13) of the ultrasonic sensor (5a) is determined, which is compared with a reference transfer function (11) and depending on the comparison of the functional state of the ultrasonic sensor (5a) is determined.