基于单片机的量程自动转换电压表设计  

Design of Measuring Range Automatic Conversion Voltage Meter Based on Single Chip Computer

作　　者：任艳玲[1] 

机构地区：[1]陕西理工学院电信系,陕西汉中723003

出　　处：《电子科技》2006年第11期56-59,共4页Electronic Science and Technology

摘　　要：介绍信号平方后积分平均技术实现交流信号真有效值测量原理;采用真有效值转换芯片AD736实现任意波形的真有效值的精确测量;通过多路模拟开关与运放的组合设置了多个电压量程,应用MC14433的超欠量程信息控制单片机,自动识别输入交流信号电压范围,选择相应的增益和衰减,实现量程自动转换功能。实验结果表明,该电压表具有读数准确、方便,精度高等特点,且适于对任意非正弦波形的测量。The paper introduces the measurement of AC signal the true effective value based on the average integral of the signal square, Using AD736, it can precisely measure the true effective value of arbitrary waveform. Using owe measuring information of MC14433 to control chip computer, the system can recognize the measuring range of automatic conversion, and combine analog switcher and operational amplifier to set multi-range voltage meter, Experimental results indicate that the voltage meter has the advantage of accurate readings, convenient operation and high precision, and it can measure arbitrary waveform signal.

关 键 词：真有效值 单片机 量程自动转换 

分 类 号：TP368.1[自动化与计算机技术—计算机系统结构]