智能电压表中量程自动转换电路研究  

The automatic range selection circuit for voltmeters

作　　者：张国恒[1] 杨志民[1] 魏秀芳[2] 

机构地区：[1]西北师范大学物理与电子工程学院 [2]兰州城市学院物理系,甘肃兰州730070

出　　处：《西北师范大学学报（自然科学版）》2006年第4期47-52,共6页Journal of Northwest Normal University(Natural Science)

摘　　要：提出并设计了一种适用于电压表的量程自动转换电路.该电路通过对被测电压的判断和量程选择器的控制,实现了在高精度仪表中量程的自动选择.电路选用低成本的普通元件,在有效范围内能实现电压自动测量,并且运用EWB仿真软件对所设计的局部电路进行了仿真,得到了预期的结果.A kind of circuit for automatic range selection of voltmeters is introduced and designed. The circuit, through evaluating the input voltage and controlling the selector of the measuring scale, realizes automatic selection in high precision instrument. By using the low-cost circuit component, this circuit can achieve the function of automatic measure in certain range and simulation of the designed circuit by the software of EWB, which produces an expected result.

关 键 词：电压表 智能化 量程转换 

分 类 号：TM930.111[电气工程—电力电子与电力传动]