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168 条记录 (耗时 0.012 秒)

    Photomultiplier gain control circuit
    29.
    发明授权
    Photomultiplier gain control circuit 失效
    光电增益控制电路

    公开(公告)号：US3714441A

    公开(公告)日：1973-01-30

    申请号：US3714441D

    申请日：1971-12-13

    申请人： SERVO CORP

    发明人： KREDA E

    IPC分类号： H01J43/30 ,  H01J39/12

    CPC分类号： H01J43/30

    摘要： Automatic gain control circuit for controlling the gain of a photomultiplier. Successive pulsed reference light beams are directed onto the photomultiplier while a dc voltage is supplied thereto causing the photomultiplier to produce successive output current signals. Each current signal is transformed to a voltage signal which is then processed to derive a maximum-amplitude signal having a value related to the maximum amplitude of the signal. A differential operational amplifier circuit then compares the value of the maximum-amplitude signal with the value of a reference signal representative of a desired output current signal produced by the photomultiplier. When the value of the maximum-amplitude signal is less than the value of the reference signal, indicating that the photomultiplier requires an increasing value of dc voltage for increasing the value of its gain, an output signal of a first polarity and having a value proportional to the difference between the two compared signals is produced by the amplifier circuit. When the value of the maximum-amplitude signal is greater than the value of the reference signal, indicating that the photomultiplier requires a decreasing value of dc voltage for decreasing the value of its gain, an output signal of a second polarity and having a value proportional to the difference between the two compared signals is produced by the amplifier circuit. A dc voltage supply control circuit coupled to the amplifier circuit receives the output signals produced by the amplifier circuit and operates in response to an output signal of the first polarity to supply a dc voltage to the photomultiplier in an increasing direction and varying at a rate determined by the value of the output signal, and in response to an output signal of the second polarity to supply a dc voltage to the photomultiplier in a decreasing direction and varying at a rate determined by the value of the output signal. The supply of dc voltage to the photomultiplier is controlled until the value of a maximum-amplitude signal is equal to the value of the reference signal.

    摘要翻译： 用于控制光电倍增管增益的自动增益控制电路。 连续脉冲参考光束被引导到光电倍增管上，同时提供直流电压，使得光电倍增管产生连续的输出电流信号。 每个电流信号被变换为电压信号，然后被处理以导出具有与信号的最大幅度相关的值的最大振幅信号。 然后差分运算放大器电路将最大幅度信号的值与表示由光电倍增管产生的期望输出电流信号的参考信号的值进行比较。

    Data storage and transfer apparatus for plural-vehicle identification system
    30.
    发明授权
    Data storage and transfer apparatus for plural-vehicle identification system 失效
    数据存储和传输装置，用于一般车辆识别系统

    公开(公告)号：US3700860A

    公开(公告)日：1972-10-24

    申请号：US3700860D

    申请日：1971-07-26

    申请人： SERVO CORP OF AMERICA

    发明人： REYNOLDS CHRISTOPHER C

    IPC分类号： B61L25/04 ,  G06K7/10

    CPC分类号： B61L25/041

    摘要： A system for identifying a carrier vehicle and piggyback vehicles positioned thereon. Each of the vehicles is equipped with an information-coded label, the information encoded in the carrier vehicle label and in the piggyback vehicle labels including features distinguishing the two types of labels and, therefore, the two types of vehicles, from each other. As the carrier and piggyback vehicles move through a label-reading area, a scanning apparatus senses the information encoded in the various labels and produces successive signals representative of the information. These signals are then processed by signal processing circuitry and applied to and stored in succession in a main data register. The signals stored in the main data register are examined by detection logic circuitry to determine the nature thereof, that is, whether carrier vehicle information or piggyback vehicle information, and, based on these determinations, selectively steered into a ''''carrier'''' register or into a ''''piggyback'''' register and stored therein. Each signal applied to and stored in the ''''piggyback'''' register is read out therefrom shortly after being stored therein but prior to the departure of the carrier and piggyback vehicles from the labelreading area. The signal stored in the ''''carrier'''' register is read out in response to the departure of the carrier and piggyback vehicles from the label-reading area. Timing circuitry is also provided in the system for preventing multiple readings of a piggyback vehicle label.

    摘要翻译： 一种用于识别载体车辆和位于其上的搭载车辆的系统。 每个车辆配备有信息编码的标签，载体车辆标签中编码的信息和背包车标签，其包括将两种类型的标签，因此两种类型的车辆彼此区分的特征。 当载体和搭载车辆移动通过标签读取区域时，扫描装置感测在各种标签中编码的信息，并产生代表信息的连续信号。 这些信号然后由信号处理电路处理，并被应用并连续地存储在主数据寄存器中。 存储在主数据寄存器中的信号由检测逻辑电路检查以确定其性质，即，载波车辆信息或搭载车辆信息，以及基于这些确定，选择性地被引导到“载波”寄存器或者 “搭载”登记并存储在其中。 施加到并存储在“搭载”寄存器中的每个信号在其中存储之后但在载体和搭载车辆从标签读取区域离开之前不久就被读出。 响应于载体和搭载车辆从标签读取区域的离开而读出存储在“载体”寄存器中的信号。 系统中还提供了定时电路，用于防止背负式车辆标签的多次读数。