Method for operating an ultrasonic sensor for a motor vehicle, wherein a reflection angle is determined on the object depending on a phase shift of an echo signal

摘要

The invention relates to a method for operating an ultrasound sensor (5a) of an ultrasound sensor device (5) for a motor vehicle (1), wherein an ultrasound signal (8) into an environment (4) of the motor vehicle (8) by means of a transmitting device (6) of the ultrasound sensor (5a). 1) is emitted and an echo signal (9) of the ultrasound signal (8) is received by a receiving device (7) of the ultrasound sensor (5a), wherein for determining a distance (12) of an object (3) in the environment (4) of Motor vehicle (1) to the ultrasonic sensor (5a) the echo signal (9) is correlated with a reference signal, and when a similarity threshold of the echo signal and the ultrasonic signal (8) in the correlated signal, a phase shift (P) of the echo signal (9) to the ultrasonic signal ( 8), due to a reflection of the ultrasonic signal (8) on the object (3), is determined, wherein depending on the phase shift (P), a reflection angle (a) at Ob jekt (3) is determined and depending on the reflection angle (a) an orientation of the echo signal (9) is determined.