峰值检测电路中过峰时刻判断方法研究  

Research on methods of cross-peak time judgment in peak detection circuit

作　　者：朱金涞[1] 毛翔[1] 朱高剑[1] 

机构地区：[1]西南交通大学电气工程学院,四川成都610031

出　　处：《电子元器件应用》2012年第5期50-53,共4页Electronic Component & Device Applications

摘　　要：峰值检测电路提供了峰值电压保持的方法,采集峰值需要准确的判断出过峰时刻。文中分别从软件和硬件两方面介绍了两种过峰时刻判断方法,软件方法结合A/D转换器和单片机程序对采集的数值比较得出过峰时刻,硬件方法采用微分电路和过零电压比较器将过峰时刻转换为高低电平信号,试验表明这两种方法都有很好的实用性。The peak detection circuit provides the method of peak voltage hold,collecting the peak value needs to accurately determine the cross-peak time.This paper proposes two methods to determine cross-peak time based on software and hardware,the software method combine A/D converter with the microcontroller program to gain cross-peak time by compare the sample value,the hardware method adopt differential circuit and zero-crossing voltage comparator to convert the peak time into high and low signal,experiments show that these two methods have good practicality.

关 键 词：峰值检测 过峰时刻 A/D转换器 微分电路 过零电压比较器 

分 类 号：TP274.2[自动化与计算机技术—检测技术与自动化装置]