摘要
以C8051F340单片机为控制核心,采用24位模数转换芯片AD7714,设计了一台高精度自动量程数字万用表。除具备万用表基本测量功能外,还具有自动量程转换功能和频率测量功能,并且可以自动对测得的数据进行数字校准。通过实验测试,系统满足设计要求,具有高精度、高可靠性等特点,有很好的实际应用价值。
This paper takes C8051 F340 single chip as the central controller and uses 24bit A/D converter chip AD7714 to design a automatic scaling-range digital multimeter with high accuracy. Except for basic measuring function of a multimeter, it can be used to shift measuring range automatically and measure frequency＇ s value, as well as calibrate those measured numbers automatically. Through the test, it is verified that this multimeter can fulfill the requirements of the design, high accuracy, reliability and practical application.
出处
《机械制造与自动化》
2012年第4期189-192,共4页
Machine Building & Automation
