利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

15 条记录 (耗时 0.021 秒)

    Active RF tag with wake-up circuit to prolong battery life
    1.
    发明授权
    Active RF tag with wake-up circuit to prolong battery life 有权
    主动RF标签具有唤醒电路，延长电池寿命

    公开(公告)号：US06593845B1

    公开(公告)日：2003-07-15

    申请号：US09407919

    申请日：1999-09-29

    申请人： Daniel J. Friedman ,  Thomas Anthony Cofino ,  Trieu C. Chieu

    发明人： Daniel J. Friedman ,  Thomas Anthony Cofino ,  Trieu C. Chieu

    IPC分类号： H04Q522

    CPC分类号： G06K19/0705 ,  G06K19/0701 ,  G06K19/0723 ,  G07C2009/00793

    摘要： An active RF transponder is provided with a wake-up circuit that wakes the RF transponder from a sleep state upon detection of an RF interrogating signal. The active RF transponder includes a battery, an antenna adapted to receive RF signals from an interrogator, and electronic circuitry providing the various RF transponder functions of sending/receiving signals and storing data. A first embodiment of the invention includes a wake-up circuit that periodically checks for the presence of an RF signal at the antenna. The wake-up circuit is coupled to the antenna and includes a switch adapted to selectively couple the battery to the electronic circuitry and provide electrical power thereto upon detection of the RF signals by the antenna. The wake-up circuit further comprises an oscillator providing a clock signal having a low duty cycle that defines intervals during which the antenna is sampled for presence of the RF signals (e.g., approximately 20 ns every 100 &mgr;s). A second embodiment of the RF transponder includes a wake-up circuit as in the first embodiment that is further adapted to detect a code sequence modulated in the RF signals. The code sequence is unique for a class of RF transponder, so the wake-up circuit can discriminate between interrogating signals. A third embodiment of the RF transponder includes a wake-up circuit that wakes the RF transponder upon detection of an RF signal that contains data within a desired band of frequencies. This embodiment enables the RF transponder to discriminate between RF signals that likely contain valid data and other RF noise. After the RF transponder has been waked, the wake-up circuit returns the RF transponder to a sleep state if valid data is not detected within a predetermined period of time.

    摘要翻译： 主动RF转发器具有唤醒电路，该唤醒电路在检测到RF询问信号时将RF应答器从睡眠状态唤醒。 主动RF转发器包括电池，适于从询问器接收RF信号的天线以及提供发送/接收信号和存储数据的各种RF应答器功能的电子电路。 本发明的第一实施例包括周期性地检查天线处的RF信号的存在的唤醒电路。 唤醒电路耦合到天线，并且包括开关，其适于在通过天线检测到RF信号时选择性地将电池耦合到电子电路并提供电力。 唤醒电路还包括振荡器，其提供具有低占空比的时钟信号，该时钟信号限定天线被采样以在RF信号的存在期间的间隔（例如，每100微秒大约20ns）。 RF转发器的第二实施例包括如第一实施例中的唤醒电路，其进一步适于检测在RF信号中调制的码序列。 代码序列对于一类RF转发器是唯一的，因此唤醒电路可以区分询问信号。 RF转发器的第三实施例包括唤醒电路，其在检测到包含期望频带中的数据的RF信号时唤醒RF应答器。 该实施例使得RF应答器能够区分可能包含有效数据的RF信号和其他RF噪声。 在RF应答器已经被唤醒之后，如果在预定时间段内没有检测到有效数据，则唤醒电路将RF应答器返回到睡眠状态。

    System and method for visually analyzing clickstream data with a parallel coordinate system
    7.
    发明授权
    System and method for visually analyzing clickstream data with a parallel coordinate system 失效
    用平行坐标系视觉分析点击流数据的系统和方法

    公开(公告)号：US06996536B1

    公开(公告)日：2006-02-07

    申请号：US09654202

    申请日：2000-09-01

    申请人： Thomas Anthony Cofino ,  Stephen H. Gomory ,  Juhnyoung Lee ,  Mark Edward Podlaseck

    发明人： Thomas Anthony Cofino ,  Stephen H. Gomory ,  Juhnyoung Lee ,  Mark Edward Podlaseck

    IPC分类号： G06F17/60

    CPC分类号： G06Q30/06 ,  G06Q30/0633 ,  G06Q30/0641 ,  Y10S707/99943

    摘要： A computer system and method that provides one or more visualizations to one or more users of a network application. The computer executes a sessionization process that receives one or more Web server logs from one or more online stores, and generates one session table for each session found from requests recorded in Web server logs. A shopping step finder process then receives one or more session tables and generates one micro-conversion table for each given session table. Finally, a visualization process receives one or more of the micro-conversion tables and generates one or more micro-conversion visualizations of one or more micro-conversions.

    摘要翻译： 一种为网络应用的一个或多个用户提供一个或多个可视化的计算机系统和方法。 计算机执行从一个或多个在线商店接收一个或多个Web服务器日志的会话过程，并且根据记录在Web服务器日志中的请求，为每个会话生成一个会话表。 然后，购物步骤查找器进程接收一个或多个会话表，并为每个给定的会话表生成一个微转换表。 最后，可视化过程接收一个或多个微转换表，并生成一个或多个微转换的一个或多个微转换可视化。

    Method of flagging partial write in RF tags
    9.
    发明授权
    Method of flagging partial write in RF tags 失效
    在RF标签中标记部分写入的方法

    公开(公告)号：US5966082A

    公开(公告)日：1999-10-12

    申请号：US862912

    申请日：1997-05-23

    申请人： Thomas Anthony Cofino ,  Daniel Joseph Friedman ,  Kenneth Alan Goldman ,  Harley Kent Heinrich

    发明人： Thomas Anthony Cofino ,  Daniel Joseph Friedman ,  Kenneth Alan Goldman ,  Harley Kent Heinrich

    IPC分类号： G06K19/07 ,  H04Q5/22

    CPC分类号： G06K19/0723

    摘要： A method, system, and apparatus for sending data from a base station to an RF tag, whereby the RF tag comprises an "intention to write to memory" field, and the "intention to write to memory" field is written before writing the data and cleared after the data is successfully written. If the data transmission is interrupted and partial data is written to the tag, the "intention to write to memory" field will not have been cleared when the tag is checked at a later time through interrogation by a base station.

    摘要翻译： 一种用于将数据从基站发送到RF标签的方法，系统和装置，由此RF标签包括“写入存储器的意图”字段，并且在写入数据之前写入“写入存储器的意图”字段 并在数据成功写入后清零。 如果数据传输被中断并且部分数据被写入标签，则当通过基站的询问稍后检查标签时，“写入存储器的意图”字段将不会被清除。