摘要
全息干涉测量利用二次曝光记录物体在不同载荷状态下的相对位移场.通过在干板上记录和比较不同状态产生的光波的干涉,可以得到在不同载荷时干涉条纹随物体位移的变化情况,实现对物体微小变形、微小位移量的测量.本文利用激光全息干涉技术测量了金属梁的微小位移量,计算得到金属梁的弹性模量和挠度.
Holographic interferometry can realize the measurement of micro-strain and micro-displacement, which applies two times exposure to record relative displacement field of the object under different load conditions, the interference fringe varies with the object＇s displacement caused by different load. In this paper, the micro-displacement of a metal bar is measured by using laser holographic interferometry, and the elastic modulus and pitch of deflection sag of the metal bar have been calculated.
出处
《物理实验》
2006年第8期8-12,共5页
Physics Experimentation
关键词
激光全息干涉
微小位移
挠度
弹性模量
laser holographic interferometry
micro-displacement
pitch of deflection sag
elastic modulus
