-
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.
-
2.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。
-
3.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。
-
公开(公告)号：US07046657B2
公开(公告)日：2006-05-16
申请号：US10023481
申请日：2001-12-17
IPC分类号： H04J3/06
CPC分类号： G01S5/0221 , G01S5/0215 , G01S5/06 , H04L41/00 , H04L41/0213 , H04L41/12 , H04W24/02 , H04W84/12
摘要： A wireless local area network system includes a plurality of access point stations at known locations that receive and transmit communication signals within the wireless local area network. A mobile access point station receives and transmits communication signals within the wireless local area network. A location processor is operatively connected to each of the access point stations and operative to process communication signals transmitted from the mobile access point station and determining which communication signals are first-to-arrive signals based on a common timing signal and conducting differentiation of the first-to-arrive signals to locate the mobile access point station.
-
公开(公告)号：US4534252A
公开(公告)日：1985-08-13
申请号：US439610
申请日：1982-11-05
CPC分类号： A24C5/28 , Y10S83/931 , Y10T74/18072 , Y10T74/18272 , Y10T83/4734 , Y10T83/4737 , Y10T83/4783
摘要： A ledger mechanism for a rod cutting apparatus comprises a ledger; a coupling rod on which the ledger is fixedly mounted; and a pair of spaced gear arrangements each having a gear ratio of 2:1 to generate a pair of points, one point on each gear arrangement, which reciprocate in synchronism along straight parallel paths, wherein the coupling rod is pivotally coupled at one end to one of said pair of points on one gear arrangement, and at its opposite end to the other of said pair of points on the other gear arrangement so that the ledger reciprocates linearly.
摘要翻译： 用于杆切割装置的分类帐机构包括分类帐; 连接杆，分条架固定在该连接杆上; 以及一对间隔齿轮装置，其各自具有2:1的齿轮比以产生一对点，每个齿轮装置上的一个点沿着平行的平行路径同步地往复运动，其中联接杆在一端枢转地连接到 在一个齿轮装置上的所述一对点中的一个，并且在其另一端与另一个齿轮装置上的所述一对点中的另一个相对的一端，使得分类器线性地往复运动。
-
6.发明授权Apparatus for determining the length of a column of tobacco or similar material 失效用于确定烟草或类似材料的柱的长度的装置
公开(公告)号：US4133454A
公开(公告)日：1979-01-09
申请号：US729467
申请日：1976-10-04
CPC分类号： G01B7/082 , A24C5/3412
摘要： Apparatus for determining the height of a column of tobacco or similar particulate material in a downwardly extending channel, comprising a first capacitor, a second capacitor formed partly by an electrode plate extending above and below the desired average level of the top surface of the tobacco column in the channel during use, a third capacitor formed partly by an electrode plate lying permanently below the top surface of the tobacco column, and an electrical circuit which compares the value of the second capacitor with the sum of the values of the first and third capacitors and from which output signal can be obtained which reflects that comparison.
摘要翻译： 用于确定向下延伸的通道中的烟草或类似颗粒材料柱的高度的装置，包括第一电容器，第二电容器，部分地由在烟草柱顶表面的期望平均水平之上和之下延伸的电极板形成的第二电容器 在使用期间的通道中，第三电容器部分地由位于烟草柱的顶表面下方的电极板形成，并且电路将第二电容器的值与第一和第三电容器的值之和进行比较 并且可以获得反映该比较的输出信号。
-
-
-
-
-
搜索结果
6 条记录 (耗时 0.03 秒)