Electronic identification system
    1.
    发明授权
    Electronic identification system 失效
    电子识别系统

    公开(公告)号:US5537105A

    公开(公告)日:1996-07-16

    申请号:US816893

    申请日:1992-01-03

    摘要: An identification system comprises 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 comprises 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.

    摘要翻译: 识别系统包括询问器和多个转发器。 询问器包括用于将询问信号发送到应答器的发射机,以及用于从应答器接收响应信号的接收机。 微处理器根据响应信号中的数据识别应答器。 每个应答器包括用于接收询问信号的接收天线,码发生器,发射天线和连接到码发生器的调制器。 在接收到询问信号时,应答器重复发送包含识别应答器的数据的响应信号。 询问器检测到任何应答器的成功识别,并且短暂中断询问信号以指示成功识别。 每个应答器包括响应于询问信号中的相应中断的逻辑电路,以停止其自己的响应信号的传输。

    Electronic identification system confirming valid code
    3.
    发明授权
    Electronic identification system confirming valid code 失效
    电子识别系统确认有效码

    公开(公告)号:US5995017A

    公开(公告)日:1999-11-30

    申请号:US976949

    申请日:1997-11-24

    摘要: An identification system having 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.

    摘要翻译: 具有询问器和多个应答器的识别系统。 询问器包括用于将询问信号发送到应答器的发射机,以及用于从应答器接收响应信号的接收机。 微处理器根据响应信号中的数据识别应答器。 每个应答器包括用于接收询问信号的接收天线,码发生器,发射天线和连接到码发生器的调制器。 在接收到询问信号时,应答器重复发送包含识别应答器的数据的响应信号。 询问器检测到任何应答器的成功识别,并且短暂中断询问信号以指示成功识别。 每个应答器包括响应于询问信号中的相应中断的逻辑电路,以停止其自己的响应信号的传输。

    Electronic indentification system with transponder muting
    5.
    发明授权
    Electronic indentification system with transponder muting 失效
    具有应答器静音的电子识别系统

    公开(公告)号:US5966083A

    公开(公告)日:1999-10-12

    申请号:US976948

    申请日:1997-11-24

    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.

    摘要翻译: 识别系统包括询问器和多个转发器。 询问器包括用于将询问信号发送到应答器的发射机,以及用于从应答器接收响应信号的接收机。 微处理器根据响应信号中的数据识别应答器。 每个应答器包括用于接收询问信号的接收天线,码发生器,发射天线和连接到码发生器的调制器。 在接收到询问信号时,应答器重复发送包含识别应答器的数据的响应信号。 询问器检测到任何应答器的成功识别,并且短暂中断询问信号以指示成功识别。 每个应答器包括响应于询问信号中的相应中断的逻辑电路,以停止其自己的响应信号的传输。