| 摘要 |
<p>A passive entry system to a protected space, especially a motor vehicle, includes a central control station (18) for locking and unlocking doors of the vehicle and providing radio communication to a remote portable electronic identification device (21). The control station (18) is initiated to poll the portable device when the vehicle is locked and a person enters a predetermined sense area around the vehicle. A number of proximity sensors (11) mounted externally of the vehicle, in turn indicator lamps (10) and tail lamps of the vehicle, for example, sense when a person is in the sense area and initiate the control station (18) to poll the identification device (21). Once a valid communication is received by the control station (18) it unlocks the vehicle. Initiation also occurs from an unlocked condition when a person exits the vehicle. Opening and closing of the driver's door initiates polling and when no valid response is received after a predetermined time the vehicle is locked.</p> |
