一种大动态范围数字式智能微伏表的设计  

A Design of Intellect Large Dynamic Range Microvolt Meter

作　　者：杨日杰[1] 王昭[1] 杨晓东[1] 赵俊渭[1] 

机构地区：[1]西北工业大学声学工程研究所

出　　处：《仪器仪表学报》1998年第5期476-480,共5页Chinese Journal of Scientific Instrument

基　　金：航空基金博士学科基金

摘　　要：本文提出一种用于测量大动态范围变化的弱信号的方法，经实际测试，取得了满意的效果。该方法采用以增益可控部件为核心的步进式数字自动增益控制电路，对信号进行大范围动态压缩；利用８０Ｃ３１微处理机对信号进行实时处理，使系统完成实时显示、故障自检和过载自动报警等功能。它既可作为大动态范围数字式微伏表，又可作为多通道大动态范围低噪声放大器使用。本文主要介绍了系统的基本工作原理、系统的硬件结构及主要软件流程。The paper presents a method to measure large dynamic range weak signal.Satisfied effects have obtained through practical tests.This method applies gain controlled technique which mainly contains gain controlled components to perform large scale dynamic condensing,and the real—time treatment conducted by 80C31 microcomputer to accomplish real—time display,error self detect and overcharge auto warning.It can be used as not only the high accurate,large dynamic range and digital microvolt meter,but also the multi—channel,large dynamic range and low noisy amplifier.The article mainly introduces the systemic basical principle,the system hardware constructure and principal software producer.

关 键 词：数字微伏表 自动增益控制 微机 弱信号 信号检测 

分 类 号：TN911.23[电子电信—通信与信息系统]