一种测定线膨胀系数的简易方法

A Simple Method on Measuring Linear Expansion Coefficient

目前大学物理实验中,线膨胀系数的测定方法主要用光杠杆法.但该法调节比较困难,读数过程存在视差,而且成本较高.文中设计了一种利用激光管测定金属线膨胀系数的简易装置,成本低廉且操作简单,准确度较高.

At present, the method of measuring the coefficient of linear expansion mainly adopts optical lever method for physics experiment of university . However, it is difficult to adjust the experiment equipment using this method, furthermore parallax error widely exists in readings process, and the cost is higher. In this paper, a simple device, using laser tube, was designed to measure the coefficient of linear expansion, which was lower in cost, simpler in operation and more accurate in measurement.