发明名称 |
Multi-memory electronic identification tag |
摘要 |
<p>Multi-memory electronic identification tags (200) are utilized in short-range cooperative electronic identification systems comprised of readers (100) and tags (200) wherein a reader (100) of a tag (200) may communicate with the tag (200) if the tag belongs to a certain class of tags. Communication is accomplished by a reader (100) establishing a reversing magnetic field (10) in the vicinity of a tag (200) and the tag (200) varying its absorption of power from the field (10) in accordance with the information to be transmitted. A first type of memory (258) is permanent and unalterable and used for storing data that is unique to the tag (200) and never needs to be changed. A second type of memory (252) is permanent but alterable and used for storing data that characterizes the object to which the tag (200) is attached. A third type of memory (259) is for the temporary storage of data produced by tag sensors (270, 275). <IMAGE></p> |
申请公布号 |
EP1251452(A1) |
申请公布日期 |
2002.10.23 |
申请号 |
EP20020000385 |
申请日期 |
1992.12.02 |
申请人 |
AVID IDENTIFICATION SYSTEMS, INC. |
发明人 |
BEIGEL, MICHAEL L. |
分类号 |
A01K11/00;G06K7/00;G06K19/07;G08B13/24;(IPC1-7):G06K7/08 |
主分类号 |
A01K11/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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