| Original document(8 pages) 中文版 |
In order to provide a security system, in particular in a motor vehicle(10), the system comprises 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). |
Application Number
申请号 |
200580003429 |
Application Date
申请日 |
2005.01.18 |
| Title 名称 |
Security system, in particular in a motor vehicle |
Publication Number
公开号 |
1914647 |
Publication Date
公开日 |
2007.02.14 |
| Approval Pub. Date |
|
Granted Pub. Date |
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| International Classification 分类号 |
G07C9/00 |
Applicant(s) Name
申请人 |
Koninkl Philips Electronics NV |
| Address 地址 |
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| Inventor(s) Name 发明人 |
Kuhn Michael H. |
| Attorney & Agent 代理人 |
li yafei chen jingjun |
| More information 更 多 信 息 |
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