微型机与应用
微型機與應用
미형궤여응용
MICROCOMPUTER & ITS APPLICATIONS
2014年
18期
23-25
,共3页
牛栋凯%徐建华%何文涛%叶甜春
牛棟凱%徐建華%何文濤%葉甜春
우동개%서건화%하문도%협첨춘
STC89C52 单片机%量程切换%双积分 A/D 转换
STC89C52 單片機%量程切換%雙積分 A/D 轉換
STC89C52 단편궤%량정절환%쌍적분 A/D 전환
STC89C52 single chip microcomputer%scale shift%double integral A/D converting
介绍了一种基于 STC89C52单片机且量程可自动切换的积分式直流数字电压表的硬件和软件设计方法。基于双积分 A/D 转换原理，提出了新的转换过程，提高了转换速度，降低了零点漂移率。与常规电压表相比，该电压表精度更高，线性度好，抗干扰性强。
介紹瞭一種基于 STC89C52單片機且量程可自動切換的積分式直流數字電壓錶的硬件和軟件設計方法。基于雙積分 A/D 轉換原理，提齣瞭新的轉換過程，提高瞭轉換速度，降低瞭零點漂移率。與常規電壓錶相比，該電壓錶精度更高，線性度好，抗榦擾性彊。
개소료일충기우 STC89C52단편궤차량정가자동절환적적분식직류수자전압표적경건화연건설계방법。기우쌍적분 A/D 전환원리，제출료신적전환과정，제고료전환속도，강저료영점표이솔。여상규전압표상비，해전압표정도경고，선성도호，항간우성강。
Based on single chip microcomputer (MCU) STC89C52, the hardware and software implementation of integral direct current digital voltmeter (DVM), which can shift the scale automatically, is introduced in this paper. Based on the principle of double integral A/D converting, a new A/D conversion process is proposed, which increases the converting speed and reduces zero drift rates. Compared with the conventional DVM, this DVM has higher precision, better linearity, and stronger anti-interference.
