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公开(公告)号：US5726630A
公开(公告)日：1998-03-10
申请号：US580913
申请日：1995-12-29
申请人： Michael John Camille Marsh , Andrzej Lenarcik , Clinton Aiden Van Zyl , Andries Christoffel Van Schalkwyk , Marthinus Jacobus Rudolph Oosthuizen
发明人： Michael John Camille Marsh , Andrzej Lenarcik , Clinton Aiden Van Zyl , Andries Christoffel Van Schalkwyk , Marthinus Jacobus Rudolph 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 , G08B13/14
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.
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公开(公告)号：US5995017A
公开(公告)日：1999-11-30
申请号：US976949
申请日：1997-11-24
IPC分类号： G01S13/74 , G01S13/75 , G06K7/00 , G06K17/00 , G07B15/06 , G07C9/00 , G08B13/14 , G08B21/02 , G08G1/017 , H04L1/08 , H04Q7/00
CPC分类号： G07B15/063 , G01S13/758 , G06K17/0022 , G06K7/0008 , G06K7/10039 , G06K7/10059 , G07C9/00111 , G08B13/1427 , G08B21/0222 , G08B21/0227 , G08G1/017 , H04L1/08
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。
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公开(公告)号：US5966083A
公开(公告)日：1999-10-12
申请号：US976948
申请日：1997-11-24
IPC分类号： G01S13/74 , G01S13/75 , G06K7/00 , G06K17/00 , G07B15/06 , G07C9/00 , G08B13/14 , G08B21/02 , G08G1/017 , H04L1/08 , H04Q7/00
CPC分类号： G07B15/063 , G01S13/758 , G06K17/0022 , G06K7/0008 , G06K7/10039 , G06K7/10059 , G07C9/00111 , G08B13/1427 , G08B21/0222 , G08B21/0227 , G08G1/017 , H04L1/08
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。
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公开(公告)号：US06621467B1
公开(公告)日：2003-09-16
申请号：US09980700
申请日：2001-11-02
IPC分类号： H01Q150
CPC分类号： G06K19/0726 , H03H7/38
摘要： A radio frequency transponder assembly comprises a passive transponder and an antenna with a matching circuit comprising an inductor and a capacitor which are formed integrally with the antenna components. The antenna is a dipole with legs formed from wire or foil strips, in which case the inductor and capacitor are formed from same material as the antenna legs. The values of the inductor and capacitor are calculated to match the antenna impedance to the equivalent load of the transponder circuit as seen via the power rectification circuits of the transponder.
摘要翻译： 射频应答器组件包括无源应答器和具有与天线部件一体形成的电感器和电容器的匹配电路的天线。 天线是具有由线或箔条形成的腿的偶极子，在这种情况下，电感器和电容器由与天线腿相同的材料形成。 计算电感和电容的值，以将天线阻抗与应答器电路的等效负载相匹配，如通过应答器的功率整流电路所见。
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公开(公告)号：US06909366B1
公开(公告)日：2005-06-21
申请号：US09623297
申请日：1999-03-03
CPC分类号： G06K7/10039 , G06K7/0008 , G06K19/0723
摘要： An identification system is provided for identifying a plurality of randomly aligned object-based transponders (18, 20, 22) passing through a predetermined reading volume. A reader (10) includes multiple transmitting and receiving antenna arrays (12, 14, 16) which are arranged sequentially to transmit interrogating and energizing fields (29) into the reading volume, with each energizing field having a different polarisation. Each transponder (12, 14, 16) is arranged to be powered by at least one of the interrogating and energizing fields, and includes a short term memory module (30) which is arranged to record the successful transmission or otherwise of the identification signal of the transponder (20) and to retain the record in the absence of a power supply to the transponder. The short term memory module has a retention time longer than any predicted interruption of power supply to the transponder via one of the energizing fields within the reading volume. The minimum memory retention time is typically the time period taken for the sequential transmission of all but one of the interrogating and energizing fields (29) during an interrogation cycle.
摘要翻译： 提供识别系统，用于识别通过预定读取体积的多个随机排列的基于对象的应答器（18,20,22）。 读取器（10）包括多个发射和接收天线阵列（12,14,16），其被顺次布置以将询问和激励场（29）发送到读取体积中，其中每个激励场具有不同的极化。 每个应答器（12,14,16）被布置成由询问和激励场中的至少一个供电，并且包括短期存储器模块（30），其被布置成记录成功发送或以其他方式识别信号的识别信号 应答器（20）并且在没有向应答器供电的情况下保留记录。 短期存储器模块具有比通过读取容积内的激励场之一对应答器的电力供应预测中断的保留时间。 最小存储器保留时间通常是在询问周期期间顺序传输询问和激励字段（29）中除了一个询问和激励字段（29）之外的所有时间周期。
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公开(公告)号：US06499656B1
公开(公告)日：2002-12-31
申请号：US09623243
申请日：2000-08-30
IPC分类号： G07B1502
CPC分类号： G06K7/10039 , G06K7/0008
摘要： An identification system is provided for identifying a plurality of object-based transponders (14, 16, 18, 20) using an interrogator (10). The interrogator (10) includes a transmitter for transmitting an interrogation signal to the transponders, a receiver for receiving identification signals from the transponders, and processor means (21) for determining the individual and correct receipt of an identification signal. The transponders operate on the basis of backscatter modulation, and include a detector for detecting the presence of an interrupt signal from the interrogator. Control logic responsive to the detector is arranged to cease signal transmission from the transponder if the transponder completes transmission of the identification signal without receiving an interrupt signal during such transmission. The interrogator (10) is arranged to receive the identification signals from the transponders (14, 16, 18, 20) and substantially contemporaneously to determine if any identification signal has been individually and correctly received. In the event of any identification signal is being individually and correctly received, the interrogator (10), at substantially the same time, transmits a common interrupt signal for temporarily suspending signal transmission from a transponder (14) if the transponder is transmitting its identification signal at the time it receives the interrupt signal. The transponder (14) independently ceases signal transmission if it completes transmission of an identification signal without receiving an interrupt signal.
摘要翻译： 提供识别系统，用于使用询问器（10）识别多个基于对象的应答器（14,16,18,20）。 询问器（10）包括用于将询问信号发送到应答器的发射机，用于从应答器接收识别信号的接收机以及用于确定识别信号的单独和正确接收的处理器装置（21）。 应答器在后向散射调制的基础上操作，并且包括用于检测来自询问器的中断信号的存在的检测器。 响应于检测器的控制逻辑被布置成如果在这种传输期间应答器完成识别信号的传输而没有接收到中断信号，则停止来自应答器的信号传输。 询问器（10）被布置成从应答器（14,16,18,20）接收识别信号并基本上同时地确定是否已经单独且正确地接收到任何识别信号。 在单独和正确地接收到任何识别信号的情况下，如果应答器正在发送其识别信号，则询问器（10）在基本上同时发送用于临时挂起信号传输的公共中断信号 当它接收到中断信号时。 如果在不接收到中断信号的情况下完成识别信号的传输，则应答器（14）独立地停止信号传输。
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公开(公告)号：US5699066A
公开(公告)日：1997-12-16
申请号：US665363
申请日：1996-06-17
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。
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