用组合测量方法测金属线胀系数  

Measuring the linear expansion coefficient of metal with combination method

作　　者：安奎生[1] 张娟[1] 郭静杰[2] 

机构地区：[1]东北师范大学物理学院,吉林长春130024 [2]衢州市实验学校,浙江衢州324000

出　　处：《物理实验》2008年第10期33-35,共3页Physics Experimentation

摘　　要：用铜-康铜温差电偶代替水银温度计对金属棒(铜棒)进行动态实时温度测量,用尺度望远镜同步读取棒长度示数,用最小二乘法进行线性拟合,从而得到金属线胀系数.A method of measuring the linear expansion coefficient of metal is introduced, in which the temperature is recorded in real time with copper-constantan thermocouple instead of thermometer and the length of the metal bar is measured using reading telescope. After least square linear fitting, the linear expansion coefficient is obtained.

关 键 词：线胀系数 温差电偶 最小二乘法 光杠杆 

分 类 号：O343.6[理学—固体力学]