消除激光键相器光散射波动干扰电路设计

A circuit design for eliminating light scattering fluctuation interference of laser Keyphasor

为了消除激光键相器由于反射带散射造成的信号波动干扰,设计了一种用于消除该干扰的电路,包括有信号放大电路、波动检测平滑电路和大回差迟滞比较器。该电路克服施密特比较器固定的上下比较电平及双电源供电问题,能够有效处理散射干扰,同时做到在信号波动较大的情况下输出可靠的脉冲,使激光键相器的应用转速范围变宽。

In the paper,it designs a laser scattering comparator to eliminate the fluctuation of the signal due to the fluctuation of the signal and the hysteresis.The circuit overcomes the problems of fixed up-down comparison level and dual power supply of Schmidt comparator.It can effectively deal with the interference of signal fluctuation components caused by the reflection of laser Keyphasor.At the same time,it can also output reliable pulse even in the case of large signal fluctuation,so that the application speed range of laser Keyphasor is widened.