ACCESS AND DRIVE AUTHORIZATION SYSTEM WITH POSITIONING CAPABILITY OF AN AUTHORIZATION MEANS USING A SOUND-BASED SIGNAL PROPAGATION TIME MEASUREMENT

摘要

The invention relates to an authentication element (1), in particular a key or a Keyless Go means for a vehicle (20), for example an automobile, having a wireless interface (2) for transmitting and/or receiving an authentication signal and having a sound element (3) for detecting and/or generating a sound wave. A device (10) is arranged on the vehicle side, in particular in and/or on an automobile, and the device (10) has at least one sound device (11a, 11b, 11c, 11d) for generating and/or detecting a sound wave and a wireless device (13) for transmitting and receiving an authentication signal. The at least one sound device (11a, 11b, 11c, 11d) preferably generates an authentication signal by means of a sound wave in order to transmit the authentication signal to the authentication element (1), and/or the sound element (3) preferably generates an authentication signal by means of a sound wave in order to transmit the authentication signal to the device (10).