Global Patent Index - EP 1069265 A2

EP 1069265 A2 2001-01-17 - Entry authorisation device and combined entry and user authorisation device

Title (en)

Entry authorisation device and combined entry and user authorisation device

Title (de)

Zugangskontrolleinrichtung sowie Zugangskontroll- und Fahrberechtigungseinrichtung

Title (fr)

Dispositif d'autorisation d'entrée et dispositif d'autorisation combinée d'entrée et d'utilisateur

Publication

EP 1069265 A2 (DE)

Application

EP 00109565 A

Priority

  • DE 19930460 A
  • DE 10012110 A

Abstract (en)

In order to avoid an unauthorized interrogation a vehicle based control equipment (13) transmits at least one short pulse towards a transponder (1). There the pulses are introduced into a transponder transmission exit circuit (7,8) via a bypass path (5) and transmitted back to the control equipment (13). The latter measures the time interval between transmission and reception of the returned pulse(s) and accepts only this transponder which assures the shortest time interval.

Abstract (de)

Das fahrzeugseitige Basisstation (14) sendet ein Abfragesignal zum Codegeber (1) aus, von dem Prüfbits durch Umgehung einer Auswerteeinheit unmittelbar zum Kraftfahrzeug zurückgesendet werden. Die Basisstation (14) misst die Zeitdauer zwischen Aussenden und Rückempfangen der Prüfbits und akzeptiert nur ein Antwortsignal des Codegebers (1), wenn die gemessene Zeitdauer kürzer als eine Referenzzeitdauer ist. <IMAGE>

IPC 1-7 (main, further and additional classification)

G07C 9/00; B60R 25/04; E05B 49/00

IPC 8 full level (invention and additional information)

G01S 19/48 (2010.01); G07C 9/00 (2006.01)

CPC (invention and additional information)

G07C 9/00309 (2013.01); G07C 2009/00373 (2013.01); G07C 2009/00531 (2013.01); G07C 2009/00793 (2013.01); G07C 2209/08 (2013.01)

Designated contracting state (EPC)

DE FR

EPO simple patent family

EP 1069265 A2 20010117; EP 1069265 A3 20040121; US 6353776 B1 20020305

INPADOC legal status


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