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公开(公告)号：US20120319819A1
公开(公告)日：2012-12-20
申请号：US13162746
申请日：2011-06-17
申请人： Artem Tkachenko
发明人： Artem Tkachenko
IPC分类号： G06K7/01
CPC分类号： G06K7/10425 , G01S5/14 , G01S11/06 , G01S11/10 , G01S13/003 , G01S13/56 , G01S13/58 , G01S13/876 , G01S13/878 , G01S13/92 , G06Q10/08 , G08B13/248
摘要： An RFD reader includes a transceiver configured to receive a first radio frequency signal reflected off at least one surface to provide baseline signal information and a second radio frequency signal reflected off the at least one surface and an object to provide further signal information. A comparator is configured to compare the baseline signal information and the further signal information to provide a signal comparison. A processor is configured to detect the presence of the object in accordance with the signal comparison. A determination is made whether the object is in motion in accordance with the signal comparison. The determination whether the object is in motion is made in accordance with a continuous fluctuation of the second radio frequency signal. A determination whether the object is no longer in motion is made in accordance with an ending of the continuous fluctuation of the second radio frequency signal.
摘要翻译： RFD读取器包括：收发器，被配置为接收从至少一个表面反射的第一射频信号，以提供基线信号信息;以及从该至少一个表面反射的第二射频信号和一个对象，以提供另外的信号信息。 比较器被配置为比较基线信号信息和另外的信号信息以提供信号比较。 处理器被配置为根据信号比较来检测对象的存在。 根据信号比较确定对象是否在运动中。 根据第二射频信号的连续波动来确定物体是否运动。 根据第二射频信号的连续波动的结束，确定对象是否不再运动。
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公开(公告)号：US20120223811A1
公开(公告)日：2012-09-06
申请号：US13039405
申请日：2011-03-03
申请人： Ben J. Wild , Artem Tkachenko , Steve Wang , Robert Barton
发明人： Ben J. Wild , Artem Tkachenko , Steve Wang , Robert Barton
IPC分类号： H04Q5/22
CPC分类号： G01S3/48 , H04Q9/00 , H04Q2209/47
摘要： A reader includes a single receiver circuit and a switching circuit coupled to the single receiver circuit. A first antenna connection is coupled to the switching circuit, wherein the first antenna connection is configured to receive a first signal from a source of radio frequency waves. A second antenna connection is coupled to the switching circuit and configured to receive a second signal from the source of radio frequency waves. A processor is configured to determine angle of arrival information in accordance with the first and second signals. The processor is further configured to determine relative phase information in accordance with the first and second signals. Additionally, the processor is configured to localize the source of radio frequency waves in accordance with the angle of arrival information. The switching circuit includes a multiplexer selectively coupling the first and second antenna connections to the single receiver circuit.
摘要翻译： 读取器包括单个接收器电路和耦合到单个接收器电路的开关电路。 第一天线连接耦合到开关电路，其中第一天线连接被配置为从射频波源接收第一信号。 第二天线连接耦合到开关电路并且被配置为从射频源接收第二信号。 处理器被配置为根据第一和第二信号确定到达角信息。 处理器还被配置为根据第一和第二信号来确定相对相位信息。 此外，处理器被配置为根据到达信息的角度来定位射频源。 开关电路包括选择性地将第一和第二天线连接耦合到单个接收器电路的多路复用器。
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公开(公告)号：US20090212921A1
公开(公告)日：2009-08-27
申请号：US12072423
申请日：2008-02-25
CPC分类号： G08C21/00 , G01S5/02 , G01S5/0252 , G01S11/02 , G01S13/756 , G01S13/876
摘要： Methods and systems for localizing an asset using the modulated backscatter from an asset tag and one or more marker tags are described. The system includes the reader, a location module and one or more marker tags. The location estimates for the asset tag are based partially on a prior knowledge of the location of each of the one or more marker tags. The location for each marker tag may be stored in a database. The location module determines a location estimate for the asset tag using the estimated parameters of the modulated backscatter signals received from one or more marker tags and from the asset tag. Using the known locations of the marker tags, a location estimate of the asset tag can be determined. The location estimate may be a relative location, an absolute location, and/or may be a zone including the marker tags. A mobile reader using the marker tags can localize asset tags throughout a large area and may, for example, take an inventory of assets throughout the large area.
摘要翻译： 描述了使用来自资产标签和一个或多个标记标签的调制反向散射来定位资产的方法和系统。 系统包括阅读器，位置模块和一个或多个标记标签。 资产标签的位置估计部分地基于对一个或多个标记标签中的每一个的位置的先验知识。 每个标记标签的位置可以存储在数据库中。 位置模块使用从一个或多个标记标签和资产标签接收的调制后向散射信号的估计参数来确定资产标签的位置估计。 使用标记标签的已知位置，可以确定资产标签的位置估计。 位置估计可以是相对位置，绝对位置，和/或可以是包括标记标签的区域。 使用标记标签的移动阅读器可以在大范围内对资产标签进行本地化，并且可以例如在整个大区域中进行资产盘点。
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公开(公告)号：US08890684B2
公开(公告)日：2014-11-18
申请号：US13162746
申请日：2011-06-17
IPC分类号： G01S13/87 , G06K7/10 , G06Q10/08 , G01S5/14 , G01S13/56 , G01S13/58 , G01S11/10 , G01S13/92 , G08B13/24
CPC分类号： G06K7/10425 , G01S5/14 , G01S11/06 , G01S11/10 , G01S13/003 , G01S13/56 , G01S13/58 , G01S13/876 , G01S13/878 , G01S13/92 , G06Q10/08 , G08B13/248
摘要： An RFD reader includes a transceiver configured to receive a first radio frequency signal reflected off at least one surface to provide baseline signal information and a second radio frequency signal reflected off the at least one surface and an object to provide further signal information. A comparator is configured to compare the baseline signal information and the further signal information to provide a signal comparison. A processor is configured to detect the presence of the object in accordance with the signal comparison. A determination is made whether the object is in motion in accordance with the signal comparison. The determination whether the object is in motion is made in accordance with a continuous fluctuation of the second radio frequency signal. A determination whether the object is no longer in motion is made in accordance with an ending of the continuous fluctuation of the second radio frequency signal.
摘要翻译： RFD读取器包括：收发器，被配置为接收从至少一个表面反射的第一射频信号，以提供基线信号信息;以及从该至少一个表面反射的第二射频信号和一个对象，以提供另外的信号信息。 比较器被配置为比较基线信号信息和另外的信号信息以提供信号比较。 处理器被配置为根据信号比较来检测对象的存在。 根据信号比较确定对象是否在运动中。 根据第二射频信号的连续波动来确定物体是否运动。 根据第二射频信号的连续波动的结束，确定对象是否不再运动。
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公开(公告)号：US09262912B2
公开(公告)日：2016-02-16
申请号：US12072423
申请日：2008-02-25
CPC分类号： G08C21/00 , G01S5/02 , G01S5/0252 , G01S11/02 , G01S13/756 , G01S13/876
摘要： Methods and systems for localizing an asset using the modulated backscatter from an asset tag and one or more marker tags are described. The system includes the reader, a location module and one or more marker tags. The location estimates for the asset tag are based partially on a prior knowledge of the location of each of the one or more marker tags. The location for each marker tag may be stored in a database. The location module determines a location estimate for the asset tag using the estimated parameters of the modulated backscatter signals received from one or more marker tags and from the asset tag. Using the known locations of the marker tags, a location estimate of the asset tag can be determined. The location estimate may be a relative location, an absolute location, and/or may be a zone including the marker tags. A mobile reader using the marker tags can localize asset tags throughout a large area and may, for example, take an inventory of assets throughout the large area.
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6.发明申请公开(公告)号：US20100060424A1
公开(公告)日：2010-03-11
申请号：US12406629
申请日：2009-03-18
CPC分类号： H04B1/707 , G01S13/751 , G06K7/0008 , G06K7/10297 , G06K19/0723 , G06K19/0724 , H04B2201/70715
摘要： One or more readers transmit radio frequency (RF) beacons to be electronically reflected by tags. Data transmitted via modulated backscatter from radio frequency identification (RFID) tags is encoded so as to permit reliable demodulation of simultaneous transmissions from multiple tags. This includes the use of spreading sequences as in direct sequence spread spectrum, where the spreading sequences may be a function of the tag ID, or may be randomly chosen. Backscattered signals from multiple tags may be detected using well-known receiver techniques for code division multiple access (CDMA) systems. Readers may be equipped with transmit and/or receive antenna arrays. A receive antenna array permits a reader to estimate directions of arrival for received signals, as well as to enhance range by performing receive beamforming.
摘要翻译： 一个或多个读取器传送射频（RF）信标以由标签电子反射。 通过来自射频识别（RFID）标签的调制反向散射发送的数据被编码，以允许来自多个标签的同时传输的可靠解调。 这包括在直接序列扩频中使用扩展序列，其中扩展序列可以是标签ID的函数，或者可以是随机选择的。 可以使用用于码分多址（CDMA）系统的公知接收机技术来检测来自多个标签的后向散射信号。 读取器可以配备发送和/或接收天线阵列。 接收天线阵列允许读取器估计接收信号的到达方向，以及通过执行接收波束形成来增强距离。
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公开(公告)号：US20140225804A1
公开(公告)日：2014-08-14
申请号：US14002005
申请日：2012-02-16
申请人： Ben J. Wild , Robert Barton , Artem Tkachenko , Steve Wang
发明人： Ben J. Wild , Robert Barton , Artem Tkachenko , Steve Wang
IPC分类号： G06K7/10
CPC分类号： G06K7/10356 , G01S3/48 , H04Q9/00 , H04Q2209/47 , H04Q2213/13095 , H04Q2213/13106
摘要： A reader includes a single receiver circuit and a switching circuit coupled to the single receiver circuit. A first antenna connection is coupled to the switching circuit, wherein the first antenna connection is configured to receive a first signal from a source of radio frequency waves. A second antenna connection is coupled to the switching circuit, and the second antenna connection is configured to receive a second signal from the source of radio frequency waves. A processor is configured to determine angle of arrival information in accordance with the first and second signals. The processor is further configured to determine relative phase information in accordance with the first and second signals. Additionally, the processor is configured to localize the source of radio frequency waves in accordance with the angle of arrival information. The switching circuit includes a multiplexer selectively coupling the first and second antenna connections to the single receiver circuit.
摘要翻译： 读取器包括单个接收器电路和耦合到单个接收器电路的开关电路。 第一天线连接耦合到开关电路，其中第一天线连接被配置为从射频波源接收第一信号。 第二天线连接耦合到开关电路，并且第二天线连接被配置为从射频源接收第二信号。 处理器被配置为根据第一和第二信号确定到达角信息。 处理器还被配置为根据第一和第二信号来确定相对相位信息。 此外，处理器被配置为根据到达信息的角度来定位射频源。 开关电路包括选择性地将第一和第二天线连接耦合到单个接收器电路的多路复用器。
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8.发明授权Applique nodes for performance and functionality enhancement in radio frequency identification systems 有权贴片节点，用于射频识别系统中的性能和功能增强公开(公告)号：US08217760B2
公开(公告)日：2012-07-10
申请号：US12407383
申请日：2009-03-19
IPC分类号： H04Q5/22
CPC分类号： G01S3/14 , G01S7/003 , G01S13/74 , G06K7/10178
摘要： In an RFID system with existing reader and tags communicating with each other, appliqués derive information by listening to this communication to yield significant performance benefits, while not affecting the communication between the existing nodes. For example, an appliqué capable of receiving beamforming can estimate the angle of arrival of the signal emitted by a tag, thereby providing information that can be used to localize the tag. An appliqué may be connected to an existing reader by means of an existing port, such as to an antenna port or to an Ethernet port. The information from appliqués can be integrated with that obtained from existing nodes at either the appliqués, or further up the hierarchy in middleware.
摘要翻译： 在具有彼此通信的现有读取器和标签的RFID系统中，贴花通过监听该通信来获得信息，以产生显着的性能优点，同时不影响现有节点之间的通信。 例如，能够接收波束形成的贴布可以估计由标签发出的信号的到达角度，从而提供可用于本地化标签的信息。 贴布可以通过现有端口连接到现有的读取器，例如到天线端口或以太网端口。 来自贴花的信息可以与从贴片上现有节点获得的信息集成，也可以与中间件的层次结构进一步集成。
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9.发明申请公开(公告)号：US20100013601A1
公开(公告)日：2010-01-21
申请号：US12407383
申请日：2009-03-19
IPC分类号： G06K7/01
CPC分类号： G01S3/14 , G01S7/003 , G01S13/74 , G06K7/10178
摘要： In an RFID system with existing reader and tags communicating with each other, appliqués derive information by listening to this communication to yield significant performance benefits, while not affecting the communication between the existing nodes. For example, an appliqué capable of receiving beamforming can estimate the angle of arrival of the signal emitted by a tag, thereby providing information that can be used to localize the tag. An appliqué may be connected to an existing reader by means of an existing port, such as to an antenna port or to an Ethernet port. The information from appliquéscan be integrated with that obtained from existing nodes at either the appliqués, or further up the hierarchy in middleware.
摘要翻译： 在具有彼此通信的现有读取器和标签的RFID系统中，贴花通过监听该通信来获得信息，以产生显着的性能优点，同时不影响现有节点之间的通信。 例如，能够接收波束形成的贴布可以估计由标签发出的信号的到达角度，从而提供可用于本地化标签的信息。 贴布可以通过现有端口连接到现有的读取器，例如到天线端口或以太网端口。 来自appliquéscan的信息与从现有节点获得的信息集合在贴布上，或者在中间件的层次结构中进一步集成。
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