The threshold voltage is set by output channel comprised of pulse generator, photoelectriccoupler and F/V converter, and the detection result is input through photoelectriccoupler.
利用可变频脉冲发生器、光电耦合器和F/V转换器组成输出通道，设定阀值；
2
The lower machine mainly includes infrared sensors, photoelectriccoupler, FPGA, wireless transmission module; the upper machine mainly includes wireless transmission module, PC and the software.