基于过零点检测方法的改进研究  

The research of improving method of detection based on zero over

作　　者：陈诚[1] 戴尔晗[1] 马亚男[1] Chen Cheng Dai Erhan Ma Yanan(College of Automation, Nanjing University of Posts andTelecommunications, Nanjing 210023, China)

机构地区：[1]南京邮电大学自动化学院,江苏南京210023

出　　处：《微型机与应用》2016年第20期79-81,共3页Microcomputer & Its Applications

基　　金：青年科学基金项目(61305095)

摘　　要：通过与传统的过零点检测方法作对比,设计出一种基于预测相位的二次平均法测量信号周期(简称预测相位积分法)的方法,通过其核心部件密勒积分器、比较器和计数器,对于每个周期信号尽可能准确地在相同相位点上开始进行积分,在标准时间内累计待测信号的脉冲个数,实现了频率测量。该方法有较好干扰能力,结构简单,测量精度高,成本低廉,具有较好的工程应用价值。In this paper,compared with the traditional zero-crossing detection method for comparison,it devised a method based on average cycle secondary measurement signal prediction phase（ referred to the estimated phase integration）. Through its core components Miller integrator,comparator and a counter,for each cycle of the signal,it as accurately as possible at the same phase point integrates and in the standard time adds up the number of signal to be measured,thus frequency measurement is achieved. The method has anti-interference ability,simple structure,high accuracy,low cost and good engineering application value.

关 键 词：过零检测 频率测量 相位积分 

分 类 号：TP353[自动化与计算机技术—计算机系统结构]