| 摘要 |
PCT No. PCT/EP97/01890 Sec. 371 Date Oct. 26, 1998 Sec. 102(e) Date Oct. 26, 1998 PCT Filed Apr. 16, 1997 PCT Pub. No. WO97/41322 PCT Pub. Date Nov. 6, 1997In a locking system, used for instance on a vehicle, a switch or sensor initiates the interrogation of a data storage medium via a control unit to check for access authorization. If access authorization is given, the control unit releases the locks of the locking system automatically. To improve user convenience regarding the system release, at least one capacitance sensor in at least one door grip is provided. At least one first electrode of the sensor is situated in the inner shell of the door grip and a second electrode is placed in the door area opposite the grip. By applying antipole voltage to both electrodes, an electrical field is generated between the two electrodes. When a hand, which acts as a dielectric, approaches the grip, a change in the cumulative dielectric state between the two electrodes occurs. Such a change is recognized by the capacitance sensor and transformed into an electric pulse which initiates in the electrical control unit interrogation of the data storage medium. The data storage medium then sends its data to the on-board electrical control unit which compares the data received with the data stored and releases the locks of the vehicle doors if the data match. |
