杨氏模量实验中长度测量仪器的选配

摘要

合理选择和搭配仪器是设计性实验的一个关键内容。文中以静态拉伸法测量金属丝杨氏模量实验为例，从测量不确定度角度出发，按照不确定度均匀分配原则，把间接测量量的不确定度要求转变为对各个直接测量量的不确定度的估算，以此选择满足要求的测量仪器，为设计性实验提供一种简单的获得仪器选配的定量指导。%The rational selecting of measuring instruments is one of key elements during designing experiments.This paper discus-ses the measuring Young’s modulus of tinsel by pulling and stretching method from the perspective of measurement uncertainty,intro-ducing a method of transforming the requirement of the indirect measurement uncertainty into the estimation of the uncertainty of direct measurements by the uniform distribution of the uncertainty principle,which is expected to provide a reference to design experiments to meet the requirements of measuring instruments.