公开(公告)号：US5557280A

公开(公告)日：1996-09-17

申请号：US111430

申请日：1993-08-25

申请人： Michael J. C. Marsh ,  Clinton A. Van Zyl

发明人： Michael J. C. Marsh ,  Clinton A. Van Zyl

IPC分类号： G08B26/00 ,  G01S13/74 ,  G01S13/78 ,  G06K7/00 ,  G06K19/00 ,  G06K19/07 ,  H04B1/59 ,  G01S13/76 ,  G01S13/79

CPC分类号： G06K7/10059 ,  G01S13/78 ,  G06K7/0008 ,  G06K7/10039

摘要： The invention relates to an identification system comprising an interrogator and a plurality of transponders. The interrogator includes transmitter means for transmitting an interrogation signal to the transponder, receiver means for receiving a response signal from the transponder, and processor means for identifying the transponder from data in the response signal. Clock extraction means are further provided for extracting a transponder clock signal from the response signal which is used to synchronise the modification of the interrogation signal with the response signal from the transponder. Each transponder comprises receiver means for receiving the interrogation signal, a transponder clock generator, a code generator, transmitter means, and a modulator connected to the code generator, so that on receipt of the interrogation signal the transponder transmits a response signal containing data which identifies the transponder. The interrogator is adapted to detect successful reception of a response signal from any transponder, to derive a synchronisation signal from the response signal of that transponder, and to modify the interrogation signal synchronously with the response signal to indicate successful reception of the response signal. Each transponder further includes means responsive to a respective modification of the interrogation signal to cease transmission of its response signal.

摘要翻译： 本发明涉及包括询问器和多个转发器的识别系统。 询问器包括用于将询问信号发送到应答器的发送器装置，用于从应答器接收响应信号的接收器装置，以及用于根据响应信号中的数据识别应答器的处理器装置。 还提供时钟提取装置，用于从响应信号中提取应答器时钟信号，该响应信号用于使询问信号的修改与来自应答器的响应信号同步。 每个应答器包括用于接收询问信号的接收机装置，应答器时钟发生器，代码发生器，发送器装置和连接到代码发生器的调制器，使得在接收到询问信号时，应答器发送包含标识的数据的响应信号 应答器。 询问器适于检测来自任何应答器的响应信号的成功接收，从该应答器的响应信号导出同步信号，并且与响应信号同步地修改询问信号以指示响应信号的成功接收。 每个应答器还包括响应于询问信号的相应修改以停止其响应信号的传输的装置。

公开(公告)号：US5519381A

公开(公告)日：1996-05-21

申请号：US154329

申请日：1993-11-18

申请人： Michael J. C. Marsh ,  Andrzej Lenarcik ,  Clinton A. Van Zyl ,  Andries C. Van Schalkwyk ,  Marthinus J. R. Oosthuizen

发明人： Michael J. C. Marsh ,  Andrzej Lenarcik ,  Clinton A. Van Zyl ,  Andries C. Van Schalkwyk ,  Marthinus J. R. Oosthuizen

IPC分类号： G07G1/14 ,  A47F9/04 ,  G01S13/24 ,  G01S13/74 ,  G01S13/75 ,  G01S13/78 ,  G01S13/87 ,  G06K7/00 ,  G06K7/08 ,  G06K7/10 ,  G06K17/00 ,  G06Q50/00 ,  G07C9/00 ,  G07G1/00 ,  G07G3/00 ,  G08B13/24 ,  H01Q1/22 ,  H01Q21/06 ,  H04B1/59 ,  G08B21/00 ,  H04B7/00

CPC分类号： H01Q1/2216 ,  A47F9/048 ,  G01S13/24 ,  G01S13/758 ,  G06K17/0022 ,  G06K7/0008 ,  G06K7/10059 ,  G06K7/10336 ,  G06K7/10346 ,  G07C9/00111 ,  G07G1/0036 ,  G07G1/0054 ,  G07G3/003 ,  G07G3/006 ,  G08B13/2422 ,  G08B13/246 ,  G08B13/2471 ,  G08B13/2474 ,  G08B13/2485 ,  G08B13/2488 ,  H01Q1/22 ,  H01Q21/065 ,  G01S13/87

摘要： An identification system comprises an interrogator and a plurality of transponders. The interrogator includes a transmitter which transmits at least two independent interrogation signals to the transponders, and a receiver for receiving response signals from the transponders. The interrogator also includes processor means for identifying the transponders from data in the received response signals. Each transponder comprises receiving means, a code generator, and transmitter means connected to the code generator. On receipt of at least one of the transmitted interrogation signals the transponder transmits a response signal containing data which identifies it. The interrogation signals may be transmitted continuously or intermittently. In a preferred embodiment, the interrogation signals are relatively narrow bandwidth signals at different frequencies. The receiving means of each transponder has a relatively broad reception bandwidth so that the transponder is responsive to one or more of the interrogation signals.

摘要翻译： 识别系统包括询问器和多个转发器。 询问器包括向发送应答器发送至少两个独立询问信号的发射机，以及用于从应答器接收响应信号的接收机。 询问器还包括用于根据所接收的响应信号中的数据识别应答器的处理器装置。 每个应答器包括接收装置，代码发生器和连接到代码发生器的发送器装置。 在接收到所发送的询问信号中的至少一个时，应答器发送包含标识它的数据的响应信号。 询问信号可以连续地或间歇地传送。 在优选实施例中，询问信号是不同频率的相对窄的带宽信号。 每个应答器的接收装置具有相对较宽的接收带宽，使得应答器响应一个或多个询问信号。