非平行板电容器测量杨氏模量的改进  

Improvement of measuring Young modulus by non-parallel plate capacitor

作　　者：唐子彦 冷文秀[2] TANG Zi-yan;LENG Wen-xiu(College of Geophysics and Information Engineering China University of Petroleum(Beijing),Beijing 102249,China;College of Science,China University of Petroleum(Beijing),Beijing 102249,China)

机构地区：[1]中国石油大学(北京)地球物理与信息工程学院,北京102249 [2]中国石油大学(北京)理学院,北京102249

出　　处：《物理实验》2018年第7期47-50,共4页Physics Experimentation

基　　金：中国石油大学(北京)教改项目

摘　　要：对非平行板电容器测杨氏模量装置进行改进,采用中心轴差动式结构,转轴设置于中极板中心,消除了边缘效应和分布电容的影响,应用改进后的装置测量了钢丝和柱状体的杨氏模量E=(1.98±0.43)N/m2.The device to measure the Young modulus by the non-parallel plate capacitor was improved by the center axis differential structure.The preparation of the rotation axis at the center of the capacitor plate could remove the fringe effect and the distributed capacitance effect.Using the improved device,the Young modulus of steel wire and cylindrical object were measured to be(1.98±0.43)N/m 2.

关 键 词：杨氏模量 非平行矩形电容器 灵敏度 差动式结构 

分 类 号：O343[理学—固体力学]