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    Multimode wireless local area network/radio frequency identification asset tag
    5.
    发明申请
    Multimode wireless local area network/radio frequency identification asset tag 审中-公开
    多模无线局域网/射频识别资产标签

    公开(公告)号：US20050030160A1

    公开(公告)日：2005-02-10

    申请号：US10827935

    申请日：2004-04-19

    申请人： David Goren ,  Raj Bridgelall ,  Bruce Willins

    发明人： David Goren ,  Raj Bridgelall ,  Bruce Willins

    IPC分类号： G06K7/00 ,  G06K19/07 ,  H04L12/28 ,  H04Q5/22

    CPC分类号： G06K19/0723 ,  G06K7/0008 ,  G06K19/07733 ,  G06K19/07758 ,  H04W84/12

    摘要： Asset tags for use in a WLAN/RFID system are provided. The asset tag comprises a processor, an RFID antenna coupled to the processor and configured to receive interrogations from an RFID reader and send replies to the RFID reader; and a wireless transceiver coupled to the processor, the wireless transceiver configured to receive information from and send information to a wireless access port of a wireless local area network.

    摘要翻译： 提供了用于WLAN / RFID系统的资产标签。 资产标签包括处理器，耦合到处理器的RFID天线，并且被配置为从RFID读取器接收询问并发送对RFID读取器的回复; 以及耦合到所述处理器的无线收发器，所述无线收发器被配置为从无线局域网的无线接入端口接收信息并将信息发送到无线接入端口。

    Symbol scanning system and method having adaptive pattern generation
    7.
    发明授权
    Symbol scanning system and method having adaptive pattern generation 失效
    具有自适应图案生成的符号扫描系统和方法

    公开(公告)号：US5569901A

    公开(公告)日：1996-10-29

    申请号：US461447

    申请日：1995-06-05

    申请人： Raj Bridgelall ,  David Goren ,  Joseph Katz ,  Simon Bard

    发明人： Raj Bridgelall ,  David Goren ,  Joseph Katz ,  Simon Bard

    IPC分类号： G06K7/10

    CPC分类号： G06K7/10871 ,  G06K7/10564 ,  G06K7/10584 ,  G06K7/10633 ,  G06K7/10643 ,  G06K7/10653 ,  G06K7/10673 ,  G06K7/10693 ,  G06K7/10722 ,  G06K7/10811 ,  G06K7/10851 ,  G06K7/10881 ,  G06K7/10891 ,  G06K7/109 ,  G06K2007/10534 ,  G06K2207/1011 ,  G06K2207/1013 ,  G06K2207/1016 ,  G06K2207/1017 ,  G06K2207/1018

    摘要： A system for scanning a symbol that has a plurality of modes including a learning mode and an adaptive mode. When the scanner is in a learning mode, a plurality of scans are generated using a plurality of sets of operating parameters. A decoder decodes the plurality of scans generated by the scanner. A data collector collects readability data indicating whether the generated scan decodes successfully or unsuccessfully for each of the sets of operating parameters. A processor determines whether the readability data is acceptable for each of the sets of operating parameters. An optimal set of operating parameters is selected from the acceptable sets of operating parameters. The optimal set of operating parameters is stored along with data identifying the symbol so that the optimal set of operating parameters may be recalled for use in scanning symbols of a similar type or in a similar environment.

    摘要翻译： 一种用于扫描具有包括学习模式和自适应模式的多种模式的符号的系统。 当扫描仪处于学习模式时，使用多组操作参数来生成多个扫描。 解码器解码由扫描器生成的多个扫描。 数据收集器收集可读性数据，指示所生成的扫描是否成功地解码，或者对于每个操作参数集合都是不成功的。 处理器确定每个操作参数集合的可读性数据是否可接受。 从可接受的操作参数组中选择最佳的一组操作参数。 操作参数的最佳集合与识别符号的数据一起存储，使得可以调用最佳的操作参数集合以用于扫描相似类型或类似环境中的符号。

    Scanning system and method of operation using wide band scanning elements for generating arbitrary rotatable multi-dimensional scanning patterns in portable or fixed scanning modes
    9.
    发明授权
    Scanning system and method of operation using wide band scanning elements for generating arbitrary rotatable multi-dimensional scanning patterns in portable or fixed scanning modes 失效
    使用宽带扫描元件的扫描系统和操作方法，用于在便携式或固定扫描模式中产生任意可旋转的多维扫描图案

    公开(公告)号：US5907146A

    公开(公告)日：1999-05-25

    申请号：US761686

    申请日：1996-12-06

    申请人： Raj Bridgelall ,  David Goren

    发明人： Raj Bridgelall ,  David Goren

    IPC分类号： G06K7/10

    CPC分类号： G06K7/10851

    摘要： A scanning system is capable of open or closed loop operation for generating arbitrary rotatable multi-dimension with frequency compensation of scanning element. The system includes at least two scan elements positioned substantially orthogonally to each other for generating the arbitrary rotatable multi-dimensional scanning patterns. A power supply is responsive to respective control signals from a set of drive waveforms as inputs to the at least two scan elements. A controller includes an information processing system to store in digital form the desired set of arbitrary rotatable multi-dimensional scan patterns. In a closed loop mode, the controller stores feedback parameters for each scan element with a particular rotational angle and a feedback value at a particular frequency. The controller uses a feedback signal from the scan elements to compute an error signal indicative of the difference in frequency response between the desired frequency response and the actual frequency response and the difference in phase between the scanning elements. The error signal adjusts the control signal provided to the power supply to conform the actual and desired frequency response of the scanning elements thereby substantially eliminating distortion in pattern generation. In an open loop mode, the scanning system is operated without a feedback signal, but the drive waveforms are regularly fine tuned in amplitude and phase to compensate for changes in frequency response due to temperature variations and aging of the scanning elements.

    摘要翻译： 扫描系统能够进行打开或闭环操作，以产生具有扫描元件的频率补偿的任意可旋转多维度。 该系统包括至少两个基本上彼此垂直定位的扫描元件，用于产生任意可旋转的多维扫描图案。 电源响应于来自一组驱动波形的各个控制信号作为至少两个扫描元件的输入。 控制器包括以数字形式存储所需的任意可旋转多维扫描图案集合的信息处理系统。 在闭环模式中，控制器存储具有特定旋转角度的每个扫描元件的反馈参数和特定频率的反馈值。 控制器使用来自扫描元件的反馈信号来计算指示期望频率响应和实际频率响应之间的频率响应差异以及扫描元件之间的相位差的误差信号。 误差信号调节提供给电源的控制信号，以符合扫描元件的实际和期望的频率响应，从而基本上消除了图案生成中的失真。 在开环模式下，扫描系统在没有反馈信号的情况下运行，但是驱动波形在幅度和相位上定期微调，以补偿由于扫描元件的温度变化和老化引起的频率响应的变化。

    Method of scanning indicia using selective sampling
    10.
    发明授权
    Method of scanning indicia using selective sampling 有权
    使用选择性采样扫描标记的方法

    公开(公告)号：US06547142B1

    公开(公告)日：2003-04-15

    申请号：US09715646

    申请日：2000-11-17

    申请人： David Goren ,  Edward Barkan ,  Raj Bridgelall

    发明人： David Goren ,  Edward Barkan ,  Raj Bridgelall

    IPC分类号： G06K710

    CPC分类号： G06K7/10851 ,  G06K7/14 ,  G06K7/1452 ,  G06K7/1478

    摘要： A method of reading an indicia, for example a bar code, comprising areas of differing light reflectivity comprises producing an electrical signal representative of light reflected from the indicia and selectively sampling the signal at a rate well below the Nyquist rate. The sample points are not uniform, and are chosen to represent key features in the signal. An attempt is then made to decode the indicia, using the samples. If the decode is unsuccessful, the samples which have been collected are analyzed to provide information on the extent to which they represent true data corresponding to the indicia, and the extent to which they present noise. Signal collection and/or processing and/or sampling is then adjusted and the process is repeated. The continual feed-back of information related to the scanning environment allows more aggressive decoding techniques to be used.

    摘要翻译： 读取包括具有不同光反射率的区域的标记（例如条形码）的方法包括产生代表从标记反射的光的电信号，并以远低于奈奎斯特速率的速率选择性采样信号。 采样点不均匀，被选择来表示信号中的关键特征。 然后尝试使用样本对标记进行解码。 如果解码不成功，则分析已经收集的样本，以提供它们表示对应于标记的真实数据的程度的信息，以及它们呈现噪声的程度。 然后调整信号采集和/或处理和/或采样，并重复该过程。 与扫描环境相关的信息的连续反馈允许使用更积极的解码技术。