基于USB总线的虚拟数字多用表设计  

Design of virtual digital multi-meter based on USB bus

作　　者：叶秀羲[1] 朱长青[1] 石右仁[1] 

机构地区：[1]军械工程学院,石家庄050003

出　　处：《电测与仪表》2007年第12期19-22,共4页Electrical Measurement & Instrumentation

摘　　要：基于USB总线的虚拟数字多用表由测量变换与信号调理模块、USB控制与数据采集模块组成的硬件和运行于主控微机的软件模块两部分组成。被测信号经过测量变换和信号调理模块转换为±5V范围内的电压信号,数据采集模块的A/D采集被转换的电压信号,然后经过主控微机上软件模块进行信号处理并且显示被测量值。The virtual digital multi-meter based on USB bus is composed of the hardware unit and software unit ran on the main control computer, the hardware unit is composed of the measurement converter and signal conditioner unit and USB control and data acquisition unit. The measurement converter and signal conditioner unit converted the signal measured to a voltage signal within the range of ±5V, the A/D of the data acquisition unit acquired the converted voltage signal, after that, the software unit on the main control computer processed the data acquired and displayed the measured value.

关 键 词：虚拟数字多用表 USB总线 浮地 高输入阻抗 

分 类 号：TM934[电气工程—电力电子与电力传动]