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    • 21. 发明授权
    • Object sensor for an optical scanner
    • 光学扫描仪的物体传感器
    • US5449891A
    • 1995-09-12
    • US59803
    • 1993-05-10
    • James Giebel
    • James Giebel
    • G06K7/10G01V8/00
    • G06K7/10861G06K2207/1012
    • An optical scanning method for reading indicia of a type having regions of different light reflectivity, the method comprising the steps of providing a scanning unit having a field of view in which indicia may be read; providing an object sensor directed at a location within or nearby the field of view of the scanning unit; supporting the scanning unit and object sensor on a movable structure; moving the scanning unit and object sensor in unison with the structure; and electrically connecting the object sensor and scanning unit, including the steps of differentiating an output of the object sensor to provide an electrical signal representative of the degree of change in the amount of reflected light, and activating the scanning unit when there is more than a predetermined change in the differentiated signal, whether that change is from an increase or decrease in the amount of reflected light; wherein when an object that is more or less reflective than the background enters the field of view the scanning unit is activated, causing it to attempt to read indicia on the object.
    • 一种用于读取具有不同光反射率区域的类型的标记的光学扫描方法,所述方法包括以下步骤:提供具有可以读取标记的视场的扫描单元; 提供指向所述扫描单元的视场内或附近的位置的物体传感器; 将扫描单元和物体传感器支撑在可移动结构上; 移动扫描单元和物体传感器与结构一致; 并且电连接物体传感器和扫描单元,包括区分物体传感器的输出以提供表示反射光量的变化程度的电信号的步骤,以及当存在多于一个 微分信号中的预定变化,该变化是否来自反射光量的增加或减少; 其中当反射比背景反射的物体进入视野时,扫描单元被激活,使其试图读取物体上的标记。
    • 22. 发明授权
    • Arrangement for and method of controlling monitor photodiode leakage current in lasers in electro-optical readers
    • 监控光电读取器激光器中的光电二极管漏电流的控制方法及控制方法
    • US08167208B2
    • 2012-05-01
    • US12821436
    • 2010-06-23
    • Mark WeitznerJames Giebel
    • Mark WeitznerJames Giebel
    • G06K7/10G08C21/00H01S3/00
    • G06K7/10584G06K7/10851
    • In an electro-optical reader, an aiming or a scanning laser has an internal laser chip and a monitor photodiode. A controller deenergizes the chip in a deenergized state, and energizes the chip to emit a laser beam with an output power in an energized state. A positive voltage power supply forward biases and maintains the photodiode at a substantially constant positive voltage below a threshold voltage, to support a substantially constant photodiode leakage current in both states. A signal processor supports a total current comprised of a main photodiode current indicative of the output power of the laser beam in the energized state and of the leakage current which flows opposite to the main current, and removes the leakage current from the total current to output only the main current in the energized state.
    • 在电光读取器中,瞄准或扫描激光器具有内部激光芯片和监视器光电二极管。 控制器以断电状态使芯片断电,并且使芯片通电以发射具有处于通电状态的输出功率的激光束。 正电压电源向前偏置并将光电二极管维持在低于阈值电压的基本上恒定的正电压,以支持两种状态中基本上恒定的光电二极管漏电流。 信号处理器支持包括主光电二极管电流的总电流,该电流表示激励状态下的激光束的输出功率和与主电流相反的漏电流,并且将漏电流从总电流消除到输出 只有主电流处于通电状态。
    • 24. 发明授权
    • Single frequency low power RFID device
    • 单频低功率RFID设备
    • US07902984B2
    • 2011-03-08
    • US12498884
    • 2009-07-07
    • Mark DuronJames GiebelDavid GorenThomas WulffRichard T. Knadle, Jr.Christopher Brock
    • Mark DuronJames GiebelDavid GorenThomas WulffRichard T. Knadle, Jr.Christopher Brock
    • G08B13/14
    • G06K7/0008
    • Methods, systems, and apparatuses for a reader transceiver circuit are described. The reader transceiver circuit incorporates a frequency generator, such as a surface acoustic wave (SAW) oscillator. A reader incorporating the reader transceiver circuit is configured to read a tag at very close range, including while being in contact with the tag. The transceiver can be coupled to various host devices in a variety of ways, including being located in a RFID reader (e.g., mobile or fixed position), a computing device, a barcode reader, etc. The transceiver can be located in an RFID module that is attachable to a host device, can be configured in the host device, or can be configured to communicate with the host device over a distance. The RFID module may include one or more antennas, such as a first antenna configured to receive a magnetic field component of an electromagnetic wave and a second antenna configured to receive an electric field component of an electromagnetic wave. The RFID module may include a detector that is configured to determine if the RFID module is positioned in proximity to an object, such as a RFID tag. The detector may operate as a trigger for the RFID module, to enable or trigger a function of the RFID module.
    • 描述了用于读取器收发器电路的方法,系统和装置。 读取器收发器电路包括频率发生器,例如表面声波(SAW)振荡器。 包括读取器收发器电路的读取器被配置为在非常接近的范围内读取标签,包括在与标签接触的同时。 收发器可以以各种方式耦合到各种主机设备,包括位于RFID读取器(例如,移动或固定位置),计算设备,条形码读取器等中。收发器可以位于RFID模块中 可附接到主机设备,可以在主机设备中配置,或者可以被配置为在一定距离上与主机设备进行通信。 RFID模块可以包括一个或多个天线,诸如被配置为接收电磁波的磁场分量的第一天线和被配置为接收电磁波的电场分量的第二天线。 RFID模块可以包括被配置为确定RFID模块是否位于诸如RFID标签之类的物体附近的检测器。 检测器可以用作RFID​​模块的触发器,以实现或触发RFID模块的功能。
    • 30. 发明授权
    • Adaptive optimizations for signal processing in imaging readers
    • 成像读取器信号处理的自适应优化
    • US08028917B2
    • 2011-10-04
    • US12338236
    • 2008-12-18
    • James Giebel
    • James Giebel
    • G06K7/10G01J1/32H03G3/20
    • G06K7/10584
    • An imaging reader includes an illuminating light assembly, an illuminating control operative to control either the intensity or the duration of the illumination light projected by the illuminating light assembly, and a solid-state imager. The solid-state imager includes a matrix of optical-sensors and a signal processing circuit coupled to the matrix of optical-sensors. The controller is operative to determine the optimized exposure level of the illuminating control and the optimized gain of the signal processing circuit based on a measured voltage of a voltage power source for the solid-state imager.
    • 成像读取器包括照明灯组件,照明控制器,用于控制由照明灯组件投影的照明光的强度或持续时间,以及固态成像器。 固态成像器包括耦合到光学传感器矩阵的光学传感器矩阵和信号处理电路。 控制器用于基于用于固态成像器的电压电源的测量电压来确定照明控制的优化曝光水平和信号处理电路的优化增益。