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.
出处
《物理实验》
2008年第10期33-35,共3页
Physics Experimentation
关键词
线胀系数
温差电偶
最小二乘法
光杠杆
linear expansion coefficient
copper-constantan thermocouple
least square
optical lever
