摘要
为提高FD-LEA-B型线膨胀系数实验仪测量金属线胀系数的实验精度,实验采用千分表法测得20~50℃区间铜棒伸长量随温度变化的关系,利用Origin软件分析不同控温方式对测量结果的影响,分析结果得出:针对FD-LEA-B型线膨胀系数实验仪的课堂教学采用持续升温,温度每隔2℃读取一次伸长量为最佳的测量方式,用最小二乘法对测量结果线性拟合,得出铜的线胀系数为16.0×10^(-6)℃^(-1).
An efficient scheme is demonstrated to improve the experimental accuracy of metal linear expansion coefficient with the FD-LEA-B instrument. In this scheme, the dial gauge method is used to measure the elonga- tion of Copper sample changing with the temperature from 20℃ to 50℃. In addition, the application of Origin soft- ware is used to analyze the measurement results at different heating processes. The result shows that measuring the elongation of Copper sample with the interval of 2℃ in the process of persistent overheating is the most desirable way for the FD-LEA-B instrument. Adopted the least square method to fit the measurement results linearly, the Copper sample＇s linear expansion coefficient is 16.0× 10-6℃-1.
出处
《大学物理》
北大核心
2017年第12期34-36,46,共4页
College Physics
基金
新疆工程学院科研基金项目(2014xgy031612)资助
关键词
千分表法
线膨胀系数
最小二乘法
Origin软件应用
dial gauge method
linear expansion coefficient
least square method
application of Origin software
