拉伸法测钢丝杨氏模量实验中减小不确定度的一种方法

An Method of Decrease Uncertainty on the Experiment Measuring Metals of Young's Modulus Using Stretched Method

拉伸法测杨氏模量试验中,采用游标卡尺代替标尺进行测量读数,方法简单易行,望远镜内读数精度提高两位,并使最终杨氏模量测量结果的不确定度降低了一个数量级。对光杠杆测量微小变化量的实验研究,提高了实验分析验证的可行性,同时也拓宽了该研究领域。

For experiment measuring metals of Young＇s Modulus using stretched method, Using verni er caliper measurement instead of ruler,it increases the reading precision two-digit from telescope, and de- creases the Young＇s Modulus＇ uncertainty of one order of magnitude. This method is simple and easy. It im- proves the feasibility of experiment verification and widens the field to the research of light-lever measure- ment of minimal quantity.