环境温度对计算机内部时间的影响及改正  

THE INFLUENCE OF ENVIRONMENTAL TEMPERATURE ON COMPUTER INTERNAL CLOCKING ALONG WITH ITS CORRECTION

作　　者：杨宇飞[1] 李崇辉[1] 游泽成[2] 焦鹏[3] 原玉磊[1] 郑勇[1] 

机构地区：[1]信息工程大学测绘学院 [2]广空95037部队 [3]96117部队

出　　处：《计算机应用与软件》2011年第11期92-95,共4页Computer Applications and Software

基　　金：国家自然科学基金(10878025)

摘　　要：简要介绍环境温度对晶振计时的影响。设计实验将计算机内部晶振时间与GPS提供的高精度UTC时间进行比对,同时记录环境温度,分析环境温度对计算机内部晶振计时影响。积累了151天的计算机内部晶振计时钟差和环境温度数据,建立了三种模型对温度与钟速的关系进行拟合分析,比较了不同模型的拟合精度,验证了各个模型改正钟差的有效性,经过温度补偿模型改正后,实验所用计算机100天的内部时间钟差最大值由25秒减小到1.7秒,精度提高了14倍。The influence of environmental temperature on crystal oscillation clocking is briefly introduced. An experimental method is designed to compare the computer internal crystal oscillation clocking against the high precision UTC time which is provided by GPS, while at the same time record environmental temperatures and analyze the influence of them upon computer internal crystal oscillation clocking. 151 days of data of computer internal crystal oscillation clocking errors and environmental temperatures are recorded. Three models are set up to do fitting analysis on the relation between temperature and clocking speed. Fitting accuracies of different models are compared. The validity of each model to correct the clocking error is checked. After correction by the temperature compensation model, the maximum internal clocking error of the experimental computer for 100 days is shortened from 25 seconds to 1.7 seconds, indicating a 14 time improvement in precision.

关 键 词：环境温度 计算机 晶振 模型 改正 钟差 

分 类 号：TP307[自动化与计算机技术—计算机系统结构]