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1.发明授权Object identification system employing pulsed magnetic field-stimulated, tag-embedded transponder 有权采用脉冲磁场刺激，标签嵌入式应答器的物体识别系统公开(公告)号：US06170748B2
公开(公告)日：2001-01-09
申请号：US09159554
申请日：1998-09-24
IPC分类号： G06K708
CPC分类号： G06K7/083
摘要： An object orientation-independent information storage and retrieval system ‘tags’ an object with a compact, strip-embedded transponder containing object identification information. The transponder remains unpowered until the tagged object passes through a pulsed time-varying magnetic field generated by a tag reader. In response to a transponder coil sensing this interrogation magnetic field, the transponder extracts and stores energy from the incident field, powering up the transponder and stimulating the emission of an alternating magnetic field reply burst encoded with information stored in memory. The reply burst has the same frequency as the interrogating magnetic field burst, and is emitted by the transponder coil prior to receipt of the next interrogation burst.
摘要翻译： 对象方向独立信息存储和检索系统使用包含对象识别信息的紧凑的带状嵌入式转发器“标记”对象。应答器保持未上电，直到被标记的对象通过由标签读取器产生的脉冲时变磁场 响应于应答器线圈感测到该询问磁场，应答器从入射场提取并存储能量，为应答器供电并且激励用存储在存储器中的信息编码的交变磁场应答脉冲串的发射，响应脉冲串 与询问磁场突发相同的频率，并且在接收到下一询问脉冲之前由应答器线圈发射。
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2.发明授权公开(公告)号：US06393045B1
公开(公告)日：2002-05-21
申请号：US09159553
申请日：1998-09-24
IPC分类号： H04L2730
CPC分类号： G06K19/0723 , G06K7/083
摘要： A magnetic field-based tagged object information storage and retrieval system employs a spread spectrum modulated magnetic field for identifying each of a plurality of tagged objects to which spread spectrum modulation magnetic field transponders are attached. When interrogated by a tag reader, transponders embedded in plural tags generate spread spectrum modulated magnetic fields that are correlated with a reference spreading sequence in a tag reader signal processor to both detect and identify each responding tag.
摘要翻译： 基于磁场的标记对象信息存储和检索系统采用扩频调制磁场来识别扩频调制磁场转发器附着到的多个标记对象中的每一个。 当被标签读取器询问时，嵌入在多个标签中的转发器产生与标签读取器信号处理器中的参考扩展序列相关的扩频调制磁场，以检测和识别每个响应标签。
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3.发明授权Magnetic field emission and differential receiver coil configuration for discriminating response magnetic field from transponder tag 有权磁场发射和差分接收器线圈配置，用于区分应答器标签的响应磁场公开(公告)号：US06268723B1
公开(公告)日：2001-07-31
申请号：US09159555
申请日：1998-09-24
IPC分类号： G08B1324
CPC分类号： G06K7/083
摘要： A magnetic field excitation and detection coil arrangement is configured to produce an electrical output signal representative of a differential combination of responses from a plurality of magnetic fields, including the field emitted from the excitation coil, a response magnetic field emitted from an object-tagged transponder interrogated by the excitation coil, and other magnetic fields from extraneous sources, such as industrial machinery. This differential combination of the responses from the detection coils will contain only the desired signal (e.g., response from an object-tagged transponder), as the other far away fields cancel, and therefore produces a net output signal level for a downstream signal (transponder output) processor.
摘要翻译： 磁场激励和检测线圈装置被配置为产生表示来自多个磁场的响应的差分组合的电输出信号，包括从励磁线圈发射的场，从物体标记的转发器发射的响应磁场 由励磁线圈询问，以及来自外部来源的其他磁场，如工业机械。 来自检测线圈的响应的这种差分组合将仅包含期望的信号（例如，来自对象标记的转发器的响应），因为其他远的场消除，并且因此产生下行信号的净输出信号电平（转发器 输出）处理器。
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4.发明授权
公开(公告)号：US6127976A
公开(公告)日：2000-10-03
申请号：US390030
申请日：1999-09-02
申请人： Robert W. Boyd , David J. Stryker , Ronald J. Hash , Donald K. Belcher , Michael A. Wohl , Timothy C. Harrington
发明人： Robert W. Boyd , David J. Stryker , Ronald J. Hash , Donald K. Belcher , Michael A. Wohl , Timothy C. Harrington
CPC分类号： G06K17/00 , G01S5/0081 , G01S5/06 , G06K2017/0045
摘要： A distributed radio geo-location and tracking system has a distributed subsystem architecture that distributes its processing workload over a plurality of information handling and processing subsystems. For maximum detection capability, each of a plurality of tag emission receivers is equipped with a circularly polarized, omnidirectional antenna, to provide hemispherical coverage. The receivers are coupled to a partitioned plurality of detection processors, that are coupled via distributed association processors to multiple location processors. Each detection processor demodulates and time stamps received energy correlated to known spreading codes of the tags, to associate received energy with only one tag. It transmits a message containing this information over a communication framework to an association processor. The computational load is equitably distributed by a flow control mechanism among available association processors, with all receptions of a single tag transmission being directed to the same association processor. An association processor organizes received messages by tag and time-of-arrival (TOA), and transmits association reports over an association communication process of the communication framework to one of plural distributed location processors. A location processor determines the geographical locations of tags using the TOA information in the association reports.
摘要翻译： 分布式无线电地理位置和跟踪系统具有分布式子系统架构，其通过多个信息处理和处理子系统分配其处理工作负载。 为了获得最大的检测能力，多个标签发射接收器中的每一个配备有圆极化的全向天线，以提供半球形覆盖。 接收器耦合到分隔的多个检测处理器，其经由分布式关联处理器耦合到多个位置处理器。 每个检测处理器解调和接收与标签的已知扩展码相关的接收能量的时间戳，以将接收到的能量与仅一个标签相关联。 它通过通信框架将包含该信息的消息发送到关联处理器。 计算负载由可用的关联处理器之间的流控制机制公平分配，单个标签传输的所有接收都被引导到相同的关联处理器。 关联处理器通过标签和到达时间（TOA）来组织接收到的消息，并且通过通信框架的关联通信过程将关联报告发送到多个分布式位置处理器之一。 位置处理器使用关联报告中的TOA信息确定标签的地理位置。
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5.发明授权Proximity-based magnetic field generator for controlling operation of RF burst-transmitting tags of geolocation system 有权用于控制地理定位系统的RF突发传输标签操作的接近磁场发生器公开(公告)号：US06853687B2
公开(公告)日：2005-02-08
申请号：US09759290
申请日：2001-01-11
CPC分类号： G01V15/00
摘要： An object tracking system for locating radio-tagged objects within a monitored environment has a plurality tag transmission readers that detect RF transmissions from the tags, and generate output signals representative of the time-of-arrival of first-to-arrive tag transmissions. An object location processor processes the first to arrive signals in accordance with a multilateration algorithm to geolocate a tag. In order to modify the operation of a tag that comes within a prescribed region of the monitored environment (such as passing through a doorway), one or more relatively short range, magnetic field proximity-based, tag-programming ‘pingers’, are placed proximate to the region. A magnetic field receiver on the tag detects the field generated by the pinger and causes the tag to change operation such as increase its RF transmission rate.
摘要翻译： 用于在受监视的环境内定位无线电标签对象的对象跟踪系统具有检测来自标签的RF传输的多个标签传输读取器，并且生成表示第一到达标签传输的到达时间的输出信号。 对象位置处理器根据多边算法处理第一个到达信号以对标签进行地理定位。 为了修改在监视环境的规定区域（例如通过门口）中的标签的操作，放置一个或多个相对较短范围的基于磁场邻近的标签编程“平” 靠近该地区。 标签上的磁场接收器检测由指孔产生的场，并使标签改变操作，例如增加其RF传输速率。
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6.发明授权Use of rotating magnetic field to enhance communication with RF burst-transmitting tags of object location system 有权使用旋转磁场增强与对象定位系统的RF突发传输标签的通信公开(公告)号：US06812839B1
公开(公告)日：2004-11-02
申请号：US09818276
申请日：2001-03-27
申请人： Donald K. Belcher , Ronald J. Hash
发明人： Donald K. Belcher , Ronald J. Hash
IPC分类号： G08B1314
CPC分类号： G01V15/00
摘要： Magnetic field-based communication with an object is enhanced by generating a rotating AC magnetic field that effectively ensures magnetic field coupling with the magnetic field sensor of the object, irrespective of the orientation of the object. The rotating AC magnetic field is produced by a diverse spatial orientation (a two-dimensional arrangement) of a plurality of magnetic field coils, and the driving of those coils in a prescribed phase relationship (e.g., in phase quadrature) to realize a composite AC magnetic field that rotates (at the carrier frequency of the coil drive signal) over the entirety of the spatial coverage area.
摘要翻译： 通过产生与物体的取向无关地有效地确保与物体的磁场传感器的磁场耦合的旋转交流磁场来增强与物体的基于磁场的通信。 旋转交流磁场由多个磁场线圈的不同的空间取向（二维排列）产生，并且以规定的相位关系（例如，相位正交）驱动那些线圈以实现复合AC 在整个空间覆盖区域上旋转（在线圈驱动信号的载波频率）的磁场。
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7.发明授权Ultra-sensitive magnetic field receiver capable of operating in high noise environments 有权超高灵敏度的磁场接收机能够在高噪声环境下工作公开(公告)号：US06476719B2
公开(公告)日：2002-11-05
申请号：US09800079
申请日：2001-03-06
IPC分类号： G08B1314
CPC分类号： H04B5/0043 , B60R25/33 , G01V15/00 , H04B1/707
摘要： The unwanted influence a noise-source environment upon a modulated (e.g., FSK-encoded) magnetic field-based communication system is diminished by a non-modulated AC magnetic field communication scheme that uses a demodulatorless magnetic field detector. When installed in a tag to be tracked by a geolocation system, the demodulatorless detector responds when the tag comes within a prescribed proximity of the field generator producing the non-modulated AC magnetic field. The received signal is downconverted to baseband and processed to detect a valid AC magnetic field tone and indicate whether the tag is within a prescribed proximity of the AC magnetic field source.
摘要翻译： 对调制（例如FSK编码的）基于磁场的通信系统的噪声源环境的不期望的影响被使用无解调器磁场检测器的非调制AC磁场通信方案所减弱。 当安装在要由地理定位系统跟踪的标签中时，无解调器检测器在标签进入产生非调制交流磁场的场发生器的指定接近度内时响应。 接收的信号被下变频到基带并被处理以检测有效的交流磁场色调并且指示标签是否在交流磁场源的规定的接近度内。
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8.发明授权Composite BPSK/AM-BPSK based spectral suppression of out-of-band energy from saturated RF amplifier 有权来自饱和RF放大器的复合BPSK / AM-BPSK频带抑制带外能量公开(公告)号：US06721369B1
公开(公告)日：2004-04-13
申请号：US09436551
申请日：1999-11-09
申请人： Ronald J. Hash , Donald K. Belcher
发明人： Ronald J. Hash , Donald K. Belcher
IPC分类号： H04K102
CPC分类号： H04L25/03834 , H04L27/08 , H04L27/20
摘要： An amplitude modulation (AM) based mechanism controllably alters the shape of a binary phase shift keyed (BPSK) digital spreading waveform modulated onto an RF carrier. The modulated RF carrier is amplified by a saturated RF amplifier. The spectral properties of the amplified AM-BPSK waveform, when combined with the spectral properties of a BPSK waveform modulated onto the RF carrier and amplified by another saturated RF amplifier, produces a composite BPSK-modulated RF waveform containing substantially suppressed sidelobes.
摘要翻译： 基于幅度调制（AM）的机制可控制地改变调制到RF载波上的二进制相移键控（BPSK）数字扩展波形的形状。 经调制的RF载波由饱和RF放大器放大。 当放大的AM-BPSK波形的频谱特性与调制到RF载波上并由另一个饱和RF放大器放大的BPSK波形的频谱特性组合时，产生包含基本上抑制的旁瓣的复合BPSK调制RF波形。
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公开(公告)号：US06987744B2
公开(公告)日：2006-01-17
申请号：US09997282
申请日：2001-11-29
摘要： A system of the present invention is operative for locating a wireless mobile device in communication with a wireless local area network (WLAN) that includes a plurality of cells defining a wireless local area network each having an access point base station. The access point base stations communicate with wireless mobile devices using wireless communication signals as typically spread spectrum communication signals. A processor is operatively connected to each of the access point base stations and operative to process communication signals transmitted from a mobile device and determine which signals are first-to-arrive signals based on a common timing signal and conduct differentiation of the first-to-arrive signals to locate the mobile device.
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10.发明授权公开(公告)号：US06892054B2
公开(公告)日：2005-05-10
申请号：US10033529
申请日：2001-12-28
CPC分类号： G01S5/0215 , H04B7/086 , H04W64/00 , H04W84/12 , H04W88/08
摘要： A wireless local area network and location system for locating objects within a monitored environment are disclosed. A plurality of access point stations receive and transmit communication signals within a wireless local area network. A processor is operatively connected to each of the access point stations and operative for processing communication signals received from the mobile station and, in one embodiment, determining which communication signals are first-to-arrive signals and conducting differentiation of the first-to-arrive signals to locate a mobile station. Delayed versions of at least one interference signal are weighted and the amplitude and phase controlled with weighted functions W1, W2 . . . Wn. The resultant weighted replicas are summed to determine an approximation of disbursed interference for cancelling interference. The location system can include a tag transmitter and spaced monitoring receivers and processor.
摘要翻译： 公开了一种用于在受监视的环境内定位对象的无线局域网和定位系统。 多个接入点站在无线局域网内接收和发送通信信号。 处理器可操作地连接到每个接入点站并且用于处理从移动站接收的通信信号，并且在一个实施例中，确定哪些通信信号是首先到达信号并且进行第一到达的区分 信号来定位移动台。 加权至少一个干扰信号的延迟版本，并且用加权函数W 1，W 2 2控制振幅和相位。 。 。 W 。 将所得到的加权副本相加以确定用于消除干扰的已发送干扰的近似值。 位置系统可以包括标签发射器和间隔的监视接收器和处理器。
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