一种简易的交流电压检测电路  

A simple AC voltage detection circuit

作　　者：张卫丰[1] 张艳辉[2] 罗欢[1] Zhang Weifeng Zhang Yanhui Luo Huan(Shenzhen Institute of Information Technology,Shenzhen 518172, China ZTE Corporation, Shenzhen 518057, China)

机构地区：[1]深圳信息职业技术学院,广东深圳518172 [2]中兴通讯股份有限公司,广东深圳518057

出　　处：《微型机与应用》2017年第5期32-34,共3页Microcomputer & Its Applications

基　　金：广东省自然科学基金博士启动项目(S2012040007242);深圳市科技计划项目(JCYJ20160527101807403;JCYJ20140418100633638);深圳信息职业技术学院教研课题(2016jgyb03)

摘　　要：提出了一种基于集成运放的交流检测电路,该电路由电压衰减电路、差分运算放大及合成电路、电压过零检测及频率检测电路等组成。通过理论推导,给出了电路关键点参数的计算公式,并用Multisim软件对电路进行了仿真,仿真结果与理论计算值一致。根据仿真设计参数,搭建了实验电路。实验结果表明,实际检测电压为3.4 V,电压过零检测信号为5 V方波,频率为100 Hz,与理论计算及仿真结果一致,验证了所设计电路的可行性。电路简单可靠,易于实现,为各种电源及仪表系统交流电检测提供了一种新尝试。A novel AC voltage detection circuit based on integrated operational amplifier is proposed. The circuit consists of a voltage decay circuit,a differential operation amplifier,a synthetic circuit,a voltage zero crossing detection circuit and a frequency detection circuit. The key parameters are derived through theoretical analysis. Then,the circuit is simulated with Multisim. The simulation results are in agreement with the theoretical calculation. According to the design parameter of the simulation,experimental circuit is built. The experimental results show that the detected voltage is 3. 4 V,voltage zero crossing detection signal is 5 V square wave and the frequency is 100 Hz. These results are in agreement with the theoretical calculation and the simulation,which validate the proposed circuit. The new circuit is simple,reliable and easy to implement,which provides a new way for application of AC voltage detection in power and instrumentation systems.

关 键 词：交流电检测 过零检测 集成运算放大器 差分运算放大电路 

分 类 号：TM911.23[电气工程—电力电子与电力传动]