杨氏模量测量误差研究及实验仪器的改进

Research on Young’s Modulus Measurement Error and Improvement of Experimental Instruments

通过对金属丝杨氏模量测量原理和数据的误差分析,研究了影响实验误差的几个关键因素,提出了减小实验误差的设计方案。通过增加光杠杆数量扩大放大倍数;固定实验仪器之间的相对位置,减小测量的不稳定因素等方法改进实验装备。利用改进后的实验装置进行实验测量,可显著降低不确定度,提高了测量值的可信赖程度。

Through the analysis of the principle and data error of the Young’s modulus of wire, several key factors affecting the experimental error are studied, and a design scheme to reduce the experi-mental error is proposed. The experimental equipment is improved by increasing the number of optical levers to enlarge the magnification;fixing the relative position between the experimental instruments and reducing the unstable factors of the measurement. The experimental measure-ment using the improved experimental device can significantly reduce the uncertainty and improve the reliability of the measured value.