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    Optically-coupled sensing and control system
    3.
    发明授权
    Optically-coupled sensing and control system 失效
    光耦合传感与控制系统

    公开(公告)号：US3816745A

    公开(公告)日：1974-06-11

    申请号：US30797472

    申请日：1972-11-20

    申请人： INNOVATION IND INC

    发明人： PRIMM R ,  MC KEOWN W ,  COPELAND J

    IPC分类号： B66B13/26 ,  H01J39/12

    CPC分类号： B66B13/26

    摘要： In an optically coupled sensing and control system, a train of light wave pulses are generated and directed along a first pathway in a first direction with the light wave pulses in said pathway diverging by a predetermined amount. Reflector apparatus receives the light wave pulses in said first pathway and directs the received pulses in a second direction opposite the first direction along a second pathway spatially displaced from the first pathway. Detection apparatus is positioned in the second pathway to detect whether the light waves in either the first or second pathway are interrupted. When light wave pulses are detected by the detection apparatus, an enabling signal is generated and then applied via gating circuitry to memory circuitry. The gating circuitry opens for a predetermined period of time after each light wave pulse is generated to allow any enabling signal to pass to the memory circuit. The memory circuit is reset in response to the generation of each light wave pulse and is set upon receipt of an enabling signal via the gating circuitry from the detecting apparatus. The memory circuit generates an output signal whenever the circuit is in the set condition. Thus, when the light wave pulses in either the first or second pathway are interrupted, the memory circuit is placed in a reset condition and when the light wave pulses are uninterrupted, the memory circuit is alternately placed in the set and reset conditions.

    摘要翻译： 在光耦合感测和控制系统中，沿着第一方向沿着第一路径产生一列光波脉冲，并且所述路径中的光波脉冲发散预定量。 反射器装置接收所述第一路径中的光波脉冲，并沿着与第一路径空间位移的第二路径在第一方向相反的第二方向上引导接收的脉冲。 检测装置位于第二路径中，以检测第一或第二路径中的光波是否中断。 当由检测装置检测到光波脉冲时，产生使能信号，然后经由选通电路施加到存储器电路。 在产生每个光波脉冲之后，选通电路打开预定的时间段，以允许任何使能信号传递到存储器电路。 响应于每个光波脉冲的产生，存储器电路被复位，并且在从检测装置经由门控电路接收到使能信号时被设置。 每当电路处于设定状态时，存储电路产生一个输出信号。 因此，当第一或第二路径中的光波脉冲中断时，存储电路处于复位状态，并且当光波脉冲不间断时，存储电路交替地置于置位和复位条件下。