Title:
特に自動車における安全システム
Document Type and Number:
Japanese Patent JP2007524782
Kind Code:
A
Abstract:
In order to provide a security system, in particular in a motor vehicle (10), comprising a transmitter which transmits a signal in the form of an electromagnetic field (11, 14) and a transportable receiver (12) which receives the signal and sends back a corresponding response signal to a further receiver, in which it is more difficult to imitate the signal transmitted by the transmitter, it is proposed that a gradient of the electromagnetic field (11, 14) can be detected by the receiver (12).
Inventors:
Michael, halal coon
Application Number:
JP2006550407A
Publication Date:
August 30, 2007
Filing Date:
January 18, 2005
Export Citation:
Assignee:
Koninklijke Philips Electronics N.V.
International Classes:
E05B49/00; B60R25/01; B60R25/10; B60R25/24; G07C9/00; G08B15/00
Attorney, Agent or Firm:
Kenji Sugimura
Kosaku Sugimura
Kiyoshi Kuruma
Shiro Fujitani
Tatsuya Sawada
Tadahiko Ito
Shinsuke Onuki
Tadashige Ito
Kosaku Sugimura
Kiyoshi Kuruma
Shiro Fujitani
Tatsuya Sawada
Tadahiko Ito
Shinsuke Onuki
Tadashige Ito