基于51单片机的数字功率表设计  

A digital power instrument design based on MCS-51

作　　者：伊元梅[1] 温宗周[1] 

机构地区：[1]西安工程大学电子信息学院,陕西西安710048

出　　处：《微型机与应用》2012年第10期28-30,共3页Microcomputer & Its Applications

摘　　要：设计了一种以51单片机为处理器的数字功率表,介绍了其硬件电路和相关软件程序流程。重点阐述了电压和电流分别采样及采用过零比较的方法利用单片机的定时器得出相位角φ的过程,选用高精度的模数转换器MAX197进行模数转换并用液晶显示器LM016L对输出结果进行显示。实验结果表明,该设计达到了较高的测量精度,具有许多优点。This paper introduces hardware design method and software program flow of digital power instrument with MCS-51 as processor. Focused on the process that sampling current and voltage respectively, and using the microcontroller timer to get phase angle ~ by the zero comparative method, choosing the high precision MAX197 for conversion module and LMO16L LCD for output results display. The experimental results show that the design reached high measuring accuracy, and it has many advantages.

关 键 词：单片机 模数转换 数字功率表 采样 LCD液晶显示器 

分 类 号：TM933[电气工程—电力电子与电力传动]