自动量程切换电压测量系统设计  

Design of Voltage Measurement System with Self-scale

作　　者：顾江[1] 

机构地区：[1]常熟理工学院,江苏常熟215500

出　　处：《现代电子技术》2009年第21期147-148,151,共3页Modern Electronics Technique

摘　　要：电压测量是电子系统中不可或缺的一项技术,随着待测电压动态范围的急剧扩大,需要能实现量程自动切换的测量方法。提出一种自动量程切换电压测量系统的设计方法,该系统基于程控增益放大器器件,使用单片机控制其增益实现量程的自动切换。针对信道误差、温度漂移等问题,采用通道自校准技术,降低了信道对于测量的误差。通过对实际软硬件的测试表明,该系统能准确根据大小信号调整量程,并对系统及环境误差有一定的抗干扰能力。It is significant of the voltage measurement in the present eleetronical system. With expanding of the dynamic range, a method owning the slef -scale is urgently required. It presents a system of voltage measurement with self- scale, based on the program control amplifier controlled by the single chip computer. Otherwise, the errors induced by the measurement channel and the temperature drift are depressed using the self - calibration technology. The examination shows that the system can adjust its measurement scale and has a certain anti- jamming capability.

关 键 词：程控放大器 单片机 自动量程切换 基准电压 

分 类 号：TP29[自动化与计算机技术—检测技术与自动化装置]