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    • 32. 发明申请
    • Item finding using RF signalling
    • 使用RF信号的项目查找
    • US20050285742A1
    • 2005-12-29
    • US10881020
    • 2004-06-29
    • Hal CharychRaj BridgelallSumita MalikMichael O'Haire
    • Hal CharychRaj BridgelallSumita MalikMichael O'Haire
    • G01S3/20G01S13/75G06K17/00G08B13/14
    • G06K17/00G01S3/20G01S13/751G06K7/10079G06K2017/0045
    • Methods and apparatus are provided for locating one among many items equipped with RFID tags. The apparatus comprises a portable system interrogating the RFID tags and receiving responses therefrom that depend at least on their bearing angle. A comparator selects responses from the one item and ignores others. An annunciator indicates the presence of the one item in the interrogator field of view and, desirably but not essentially, its relative proximity. A directional antenna whose beam pattern is limited in azimuth and/or elevation provides bearing angle information. Its field of view becomes progressively smaller as the antenna approaches the one item so that a user can substantially pinpoint its location without needing any of the usual RFID infrastructure. Tag response hit rate and/or signal strength provides range related information to the interrogator. Optionally, the presence of each new tag is announced until all new tags have been identified.
    • 提供了用于在配备有RFID标签的许多物品中定位的方法和装置。 该装置包括询问RFID标签并从其接收至少依赖于其承载角度的响应的便携式系统。 比较器选择一个项目的响应并忽略其他项目。 指示器指示在询问器视场中存在一个项目,并且希望但不是基本上它的相对接近度。 波束图案在方位和/或高度上被限制的定向天线提供了轴承角度信息。 随着天线接近一个项目,其视野逐渐变小,使得用户可以基本上精确定位其位置,而不需要任何通常的RFID基础设施。 标签响应命中率和/或信号强度向询问器提供范围相关信息。 可选地,每个新标签的存在被公布,直到所有新的标签被识别为止。
    • 33. 发明申请
    • Self-associating wireless personal area network
    • 自联无线个域网
    • US20050201301A1
    • 2005-09-15
    • US10883005
    • 2004-06-30
    • Raj Bridgelall
    • Raj Bridgelall
    • H04L12/26H04L12/28H04W4/20H04W84/10
    • H04W4/203H04W84/10
    • Methods and apparatus are provided for automatically and autonomously forming a wireless personal area network (WPAN) from an array of intercommunicating personal area network (PAN) devices. The devices comprise first communicators associated with primary functions of the devices and second communicators coupled to the first communicators for determining a subset of the devices meeting predetermined association criteria, from which subset the first communicators form the WPAN. In a preferred embodiment, the second communicators include range measuring transceivers and processors coupled to the transceivers that cooperate to determine range and relative motion of elements within communication range of the first communicators for comparison to range and relative motion association criteria stored in one or more of the devices. Memory is desirably included for storing the association criteria. The subset of devices automatically elects a master device that communicates with the other devices of the subset to form the WPAN.
    • 提供了用于从互通的个人区域网络(PAN)装置的阵列中自动和自主地形成无线个人区域网络(WPAN)的方法和装置。 所述设备包括与设备的主要功能相关联的第一通信器和耦合到第一通信器的第二通信器,用于确定满足预定关联标准的设备的子集,第一通信器从该子组形成WPAN。 在优选实施例中,第二通信器包括量测测量收发器和耦合到收发器的处理器,其协作以确定第一通信器的通信范围内的元件的范围和相对运动,用于与存储在一个或多个 设备。 理想地包括用于存储关联标准的存储器。 设备子集自动选择与该子集的其他设备进行通信的主设备,以形成WPAN。
    • 34. 发明申请
    • Method for optimizing the design and implementation of RFID tags
    • RFID标签设计与实现优化方法
    • US20050030201A1
    • 2005-02-10
    • US10830273
    • 2004-04-21
    • Raj Bridgelall
    • Raj Bridgelall
    • G06K7/00G06K19/07G08C19/04
    • G06K7/0008G06K19/0723
    • A method is provided for optimizing the design parameters of a RFID tag for use with a RFID reader in a RFID system. In the method, a desired frequency band that the RFID tag will operate in is chosen. Additionally, a maximum acceptable cost for the RFID tag, a minimum acceptable data range for the RFID tag and a minimum operating voltage for the RFID tag are chosen. For a given cost, an optimal data rate is calculated by varying a carrier modulation period of an interrogation signal generated by the RFID reader and antenna capacitance of the RFID tag. Next, an optimal range for a given operating voltage is calculated using the optimal data rate.
    • 提供了一种优化用于RFID系统中的RFID读取器的RFID标签的设计参数的方法。 在该方法中,选择RFID标签将在其中操作的期望频带。 此外,选择RFID标签的最大可接受成本,RFID标签的最小可接受数据范围和RFID标签的最小工作电压。 对于给定的成本,通过改变由RFID读取器生成的询问信号的载波调制周期和RFID标签的天线电容来计算最佳数据速率。 接下来,使用最优数据速率来计算给定工作电压的最佳范围。
    • 37. 发明授权
    • Self-associating wireless personal area network
    • 自联无线个域网
    • US07403744B2
    • 2008-07-22
    • US10883005
    • 2004-06-30
    • Raj Bridgelall
    • Raj Bridgelall
    • H04B7/00
    • H04W4/203H04W84/10
    • Methods and apparatus are provided for automatically and autonomously forming a wireless personal area network (WPAN) from an array of intercommunicating personal area network (PAN) devices. The devices comprise first communicators associated with primary functions of the devices and second communicators coupled to the first communicators for determining a subset of the devices meeting predetermined association criteria, from which subset the first communicators form the WPAN. In a preferred embodiment, the second communicators include range measuring transceivers and processors coupled to the transceivers that cooperate to determine range and relative motion of elements within communication range of the first communicators for comparison to range and relative motion association criteria stored in one or more of the devices. Memory is desirably included for storing the association criteria. The subset of devices automatically elects a master device that communicates with the other devices of the subset to form the WPAN.
    • 提供了用于从互通的个人区域网络(PAN)装置的阵列中自动和自主地形成无线个人区域网络(WPAN)的方法和装置。 这些设备包括与设备的主要功能相关联的第一通信器和耦合到第一通信器的第二通信器,用于确定满足预定关联标准的设备的子集,第一通信器从该子组形成WPAN。 在优选实施例中,第二通信器包括量测测量收发器和耦合到收发器的处理器,其协作以确定第一通信器的通信范围内的元件的范围和相对运动,用于与存储在一个或多个 设备。 理想地包括用于存储关联标准的存储器。 设备子集自动选择与该子集的其他设备进行通信的主设备,以形成WPAN。