基于AD7710的6位半电压表头的研制  

Design of DC Voltage Meter With 61/2 Resolution Based on AD7710

作　　者：周水斌[1] 陈小桥[1] 杨敏 

机构地区：[1]武汉大学电子信息学院,湖北武汉430079 [2]许继电气集团电气保护及自动化事业部,河南许昌461000

出　　处：《仪表技术与传感器》2004年第1期32-34,共3页Instrument Technique and Sensor

摘　　要：电压测量是电量和非电量检测的一个重要部分。介绍了基于24位模/数器件AD7710的直流电压表头的硬件设计和软件设计。阐述了AD7710的模拟电压输入、基准电压输入以及与微处理器的数字接口电路。分析介绍了表头的采样滤波、快速平均、自动量程转换与校准技术。对印制电路板和软件设计等要注意的问题进行了讨论。Voltage measuring is very important and also generally.It is the final part of the non-electric quantity detecting in computerized measurement system.The hardware and software of the DC voltage meter based on AD7710 is proposed.The circuit of analog input,reference input and the serial digital interface with microcomputer of AD7710 is presented.The technology of digital filtering,calibrating,fast averaging and automatic range switching is detailed.And some problems in designing PCB for the high resolution are discussed.

关 键 词：电压测量 模数转换 AD7710 校准 直流电压表头 研制 

分 类 号：TM933.2[电气工程—电力电子与电力传动]