可视化金属丝弹性模量测量平台设计

Design of Visual Metal Wire Elastic Modulus Measurement Platform

设计的可视化金属丝弹性模量测量平台,利用干涉法测量光程差原理,开发了一套干涉光斑测量装置,准确地测量出了金属材料拉伸过程中的微小形变量。引入机器视觉方法,实现了金属材料截面积的可视化测量。所搭建的传动结构可连续、稳定地施加拉力,为平台所开发的图形化操作界面,使测量过程可视化,通过观察材料表面形貌特征位移来验证拉伸变化。平台提高了实验测量精度,测量结果相对误差为3.3%。该测量平台可作为综合性实验仪器应用于大学物理实验教学当中。

A set of visual measurement platform for the elastic modulus of gold wire is designed.A set of interference facula measure device is designed base on that principle of measuring the optical path difference by using the interference method,and the micro deformation of the metal material in the stretching proces is accurately measured.The machine vision method is introduced to realize the visual measurement of the sectional area of metal materials.The built transmission structure can continuously and stably apply the pulling force.The graphical operation interface developed for the platform makes the measurement process visualized,and the tensile change is verified by observing the displacement of material surface topography characteristics.The platform improves the experimental measurement accuracy,and the relative error of measurement results is 3.3%.The measurement platform can be used as a comprehensive experimental instrument in college physics experiment teaching.