不良导体导热系数实验降温数据处理讨论  

Discussion on experimental cooling data management of poor conductor thermal conductivity coefficient

作　　者：李泽朋[1] 郭松青[1] 王维波[1] 

机构地区：[1]中国民航大学理学院,天津300300

出　　处：《中国民航大学学报》2015年第3期41-43,47,共4页Journal of Civil Aviation University of China

基　　金：国家自然科学基金(11304380);中国民航大学实验技术创新基金(2014LXWS005);中央高校基本科研业务费专项(3122013D008);中国民航大学科研启动基金(2011QD23X)

摘　　要：以数据分析和绘图软件Origin为例,对稳态法测量不良导体导热系数实验中计算散热盘在稳态温度的降温速率进行了计算机辅助处理过程介绍。对软件辅助处理过程中的散热盘降温曲线拟合依据进行了原理推导。基于牛顿冷却定律,推导得知冷却降温时物体的温度T与时间t之间遵循幂级数多项式形式,因此计算机软件辅助处理进行降温曲线拟合时,采用多项式拟合。一般情况下,拟合时多项式的阶数选择2阶便可满足结果精确度要求。The computer-aid procedure in dealing with the cooling data with the steady-state method for thermal conductivity measurement based on data analysis and Origin software is introduced. The theory basis fitting the cooling curve with the assist of Origin is derived. According to the Newton＇ s law of cooling, the derived relation between cooling temperature and time is in muhinomial form. Therefore, the multinomial fitting is chosen when fitting the cooling curve with the assist of computer and software. And generally, the two order muhinomial fitting is enough to meet with the criterion in accuracy.

关 键 词：稳态法 导热系数 拟合 降温速率 

分 类 号：O551.1[理学—热学与物质分子运动论]