利用激光三角法测量钢丝的弹性模量  

Measuring elastic modulus of steel wire based on laser triangulation method

作　　者：郑雪丽[1] 邱丽 汪涛[1] 李巧梅[1] 杨骏骏 ZHENG Xue-li;QIU Li;WANG Tao;LI Qiao-mei;YANG Jun-jun(National Demonstration Center for Experimental Physics Education,College of Physics,Chongqing University,Chongqing 401331,China)

机构地区：[1]重庆大学物理学院物理国家级实验教学示范中心,重庆401331

出　　处：《物理实验》2022年第2期20-23,共4页Physics Experimentation

基　　金：2019年重庆市高等教育教学改革研究项目(No.193008);2019年重庆大学实验教学改革项目(No.2019S08);2020年重庆大学教学改革研究立项项目(No.2020Y50)。

摘　　要：以改进弹性模量实验测量方法为例,采用激光三角法测量钢丝的弹性模量.结合光电子技术,利用PSD测量系统将力学参量转变为电学参量,根据理论推导得到钢丝弹性模量的计算公式.实验结果表明该方法稳定性好、精度高,适合运用于“新工科”背景下的大学物理实验教学.Taking the improved measurement method of elastic modulus as an example,the elastic modulus of steel wire was measured based on the laser triangulation method.Combined with optoelectronic technology,the PSD measurement system was used to convert the mechanical parameters into electrical parameters,and then the calculation formula of the elastic modulus was derived.The experimental results showed that the method had the advantages of good stability and high precision,and was suitable for college physics experiment teaching under the background of“new engineering”.

关 键 词：弹性模量 激光三角法 PSD测量系统 

分 类 号：O343[理学—固体力学]