Optical process variable transmitter
    4.
    发明授权
    Optical process variable transmitter 失效
    光学过程变量变送器

    公开(公告)号:US5258868A

    公开(公告)日:1993-11-02

    申请号:US474444

    申请日:1990-02-02

    IPC分类号: H04B10/00

    CPC分类号: H04B10/807

    摘要: A light input energizes an optical transmitter providing a light output to a waveguide indicating a process variable. The transmitter has a process variable sensor generating a sensor output. An electrical circuit receives the sensor output and generates an electrical transmitter output indicating the process variable adjusted by a changeable parameter stored in the electrical circuit. The electrical circuit has an input energizing the circuit. An LED converts the electrical transmitter output to the light output. A gallium arsenide photodiode converts a first portion of received light into electrical energy provided to the energization input and converts a second portion of the received light into an electrical output controlling the stored parameter.

    摘要翻译: 光输入激励向发射器提供光输出的光发射器,其指示过程变量。 变送器具有产生传感器输出的过程变量传感器。 电路接收传感器输出并产生指示由存储在电路中的可变参数调整的过程变量的电发送器输出。 电路具有对电路通电的输入。 LED将电发射器输出转换为光输出。 砷化镓光电二极管将接收的光的第一部分转换成提供给通电输入的电能,并将接收的光的第二部分转换成控制存储的参数的电输出。