Method for operating an ultrasonic sensor of a motor vehicle with determination of a propagation velocity of the ultrasonic signal on the basis of distance data of a reference system and device

摘要

The invention relates to a method for operating an ultrasonic sensor (4) of a motor vehicle (1), in which an ultrasonic signal is emitted, which is received by an object (8) in an environmental region (9) of the motor vehicle (1) reflected ultrasonic signal and a transit time between the emission of the ultrasound signal and the reception of the ultrasound signal reflected by the object (8), a propagation velocity of the ultrasound signal in the air in the surrounding area (9) being determined and the ultrasound sensor (4) being operated as a function of the propagation velocity, wherein distance data which describes a distance between the ultrasonic sensor (4) and the object (8) are determined by means of a reference system (11) which differs from the ultrasonic sensor (4), and the transit time and the transit time determined by means of the ultrasonic sensor (4) Propagation speed is determined.