For measurement of metal wire coefficient,this papeies studies on copper bar with self-made hydraulic micro-displacement transfer in place of optical lever and telescope.The paper improves the traditional experiment instrument and denotes slight elongation of wire bar with the principle of hydraulic micro-displacement magnifying mechanism.According to experiment principle,uncertainty analysis and measurement data,the paper analyzes and discusses the experiment approach of hydraulic micro-displacement transfer measuring expansion coefficient of metal wire.The new approach can not only improve measuring accuracy,but also reduce test cost.The paper makes use of uncertainty with confidence probability of 95 to analyze and evaluate the measurement data,and attain more reasonable result.At last,the paper puts forwards a new approach to measure expansion coefficient of metal wire.

The paper measures the cycle of simple harmonic motion with the method of gas-track by improving gas-track system.The paper has analyzed the calibration curve between the square of the cycle and its inertial mass according to experiment principle and uncertainty analysis,combined with measurement data.And the paper validates the relationship between the square of the cycle of objects performing simple harmonic motion on the gas-track and inertial mass,which further validates that inertial mass of object is equal to its gravitational mass.

针对静态拉伸法,依据光放大原理,采用一次性增(减)砝码的测量方案,使钢丝充分地拉伸(或收缩),反复读取标尺刻度值来测定钢丝的微小伸(缩)量,由实验原理及其不确定度的分析,结合测量数据,应用Spss分析给出标尺刻度变化量与其所加砝码质量的定标曲线.选定砝码质量,用定标曲线标定出刻度尺的变化量,最终计算出钢丝的杨氏模量.用置信概率为95％的不确定度对实验数据进行分析与评定,能得到更加合理的实验结果.