交流过零检测电路的研究与设计

在对现有过零检测方法的研究基础上,设计了一种纯硬件的双向交流过零检测电路。利用交流信号自身的特性,通过处理电路提取同向与反向检测信号,并利用通用接口形式来满足不同电压等级微处理器的接口需求。通过Multisim软件搭建双向过零检测电路仿真模型,其运行结果达到了预期的效果,表明该方案能够有效甄别交流信号的双向过零点,可以直接作为后续控制系统的双向过零点检测信号。

Research and Design of AC Zero Crossing Detection Circuit

Based on the research of the existing zero crossing detection methods,a pure hardware with only two-way AC zero crossing detection circuit was designed.By using the characteristics of the AC signal,the same direction and reverse detection signals were extracted by the processing circuit,and the general interface form was used to meet the interface requirements of different voltage level microprocessors.The simulation circuit model of two-way zero crossing was built by Multisim software,the result of its operation reached the expected effect.It shows that the scheme can effectively distinguish the two-way zero crossing of the AC signal,and can be used as the two-way zero crossing detection signal of the follow-up control system directly.