| 摘要 |
A recognition device is described that is used to control the unlocking of vehicle openings and/or to authorize the start-up of the vehicle. The device includes a first emitter which, on command, can send a first user identification signal over a carrier wave having a given first frequency (nu 1 ) to a receiver. The device also includes a second emitter which can emit at least one second user identification signal over a carrier wave having a second frequency (nu 2 ) which is different from the first frequency such that the second signal can act as an identifier signal in the shadow zones where the first signal is not recognized.
|
