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    • 31. 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。
    • 36. 发明申请
    • Reverse infrastructure location system and method
    • 反向基础设施定位系统和方法
    • US20060071790A1
    • 2006-04-06
    • US10954967
    • 2004-09-29
    • Mark DuronRaj Bridgelall
    • Mark DuronRaj Bridgelall
    • G08B13/14
    • G01S13/876G01S13/46G01S13/75G01S2013/466G06K17/00G06K2017/0048
    • Methods and apparatus are provided to locate a terminal within a workspace. Radio frequency identification (RFID) tags are provided in known locations, preferably in, on or adjacent the light fixtures or other workspace infrastructure. The terminal comprises an RFID tag interrogation transceiver, processor and memory. The transceiver interrogates the tags which respond with information correlatable with their unique locations. The terminal determines its locations relative to the known locations of responding tags by, for example, varying its transmit power and/or receiver sensitivity and/or by trilateration using, for example, phase or time difference of arrival measurements on the tag response signals. Once it has determined its own location it may transmit or otherwise announce its location as desired by the user. In a preferred embodiment, the natural electromagnetic radiation and/or RADAR cross section backscatter from fluorescent type fixtures, modulated with their position information, acts as the RFID infrastructure beacon.
    • 提供方法和装置以在工作空间内定位终端。 射频识别(RFID)标签在已知位置提供,优选地在照明设备或其他工作空间基础设施中,之上或附近。 终端包括RFID标签询问收发器,处理器和存储器。 收发机询问用与其独特位置相关的信息进行响应的标签。 终端通过例如通过例如相对于标签响应信号上的到达测量的相位或时间差来改变其发射功率和/或接收机灵敏度和/或通过三边测量来确定其相对于响应标签的已知位置的位置。 一旦确定了自己的位置,它可以根据用户的需要发送或以其他方式通知其位置。 在优选实施例中,用其位置信息调制的荧光型固定装置的自然电磁辐射和/或RADAR横向背散射充当RFID基础设施信标。
    • 40. 发明授权
    • Optical scanners
    • 光学扫描仪
    • US06209788B1
    • 2001-04-03
    • US09436468
    • 1999-11-08
    • Raj BridgelallEdward BarkanStephen ShellhammerJoseph CampanelliJoseph KatzYajun LiDaniel R. McGlynn
    • Raj BridgelallEdward BarkanStephen ShellhammerJoseph CampanelliJoseph KatzYajun LiDaniel R. McGlynn
    • G06K710
    • G06K7/10851G06K7/14G06K7/1452G06K7/1478
    • An optical scanning system is provided for producing a signal representative of a spatial distribution of indicia having different degrees of reflectivity to light, such as a bar code (14). The system includes an optical scanner (12) for scanning beam of light over the spatial distribution of indicia (14) and for producing an electrical signal corresponding to changes in the degree of reflectivity of the indicia. A digitizer (20), responsive to detections in a predetermined characteristic of the produced electrical signal is provided. The digitizer (20) converts the detections into digital words, such digital signals having a plurality of bits. The digitizer includes a timing generation circuit (42) for producing a pulse in response to each one of the detections with a time duration representative of the degree of reflectivity of the indicia as the beam of light. A decoder converts the time duration of the pulse into the digital word having a plurality of bits. An enhancement filter (30) is also disclosed. The enhancement filter (30) modifies pulses produced by a differentiator circuit (24) used in the scanner. Such modification includes increasing the rise time, and peak level of, the pulses produced by the differentiator circuit (24).
    • 提供了一种光学扫描系统,用于产生表示具有不同光反射度的标记的空间分布的信号,例如条形码(14)。 该系统包括用于在标记(14)的空间分布上扫描光束并用于产生对应于标记的反射度的变化的电信号的光学扫描器(12)。 提供了响应于所产生的电信号的预定特性中的检测的数字转换器(20)。 数字转换器(20)将检测转换为数字字,这样的数字信号具有多个位。 数字转换器包括一个定时产生电路(42),用于响应于每个检测产生一个脉冲,时间间隔代表作为光束的标记的反射率。 解码器将脉冲的持续时间转换为具有多个位的数字字。 还公开了增强滤波器(30)。 增强滤波器(30)修改由扫描器中使用的微分电路(24)产生的脉冲。 这种修改包括增加由微分电路(24)产生的脉冲的上升时间和峰值电平。