发明名称 |
Electronic indentification system with transponder muting |
摘要 |
An identification system includes an interrogator and a number of transponders. The interrogator includes a transmitter for transmitting an interrogation signal to the transponder, and a receiver for receiving a response signal from the transponder. A micro-processor identifies the transponder from data in the response signal. Each transponder includes a receiving antenna for receiving the interrogation signal, a code generator, a transmitting antenna, and a modulator connected to the code generator. On receipt of the interrogation signal the transponder repeatedly transmits a response signal containing data which identifies the transponder. The interrogator detects successful identification of any transponder and briefly interrupts the interrogation signal to indicate the successful identification. Each transponder includes a logic circuit responsive to a respective interruption in the interrogation signal to cease transmission of its own response signal.
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申请公布号 |
US5966083(A) |
申请公布日期 |
1999.10.12 |
申请号 |
US19970976948 |
申请日期 |
1997.11.24 |
申请人 |
BTG INTERNATIONAL LIMITED |
发明人 |
MARSH, MICHAEL JOHN CAMILLE;LENARCIK, ANDRZEJ |
分类号 |
G01S13/74;G01S13/75;G06K7/00;G06K17/00;G07B15/06;G07C9/00;G08B13/14;G08B21/02;G08G1/017;H04L1/08;(IPC1-7):H04Q7/00 |
主分类号 |
G01S13/74 |
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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