Device for measuring the distance from a motor vehicle to an obstruction includes ultrasonic sensors and a driving mechanism fitted to the sensors

摘要

In order to fit an ultrasonic sensor (2) preferably in a motor vehicle ventilation grille (3) so as to make it invisible and protect it, without the grill causing reflective interference and diffraction in the ultrasonic waves, the ultrasonic sensor can be moved by a driving mechanism from a retracted position to an extended position and vice versa.