摘要
结合双光栅对固体材料杨氏模量进行动态测量,激光通过达到共振的样品时,由双光栅将微弱的振动位移通过光拍信号放大,通过示波器输出拍频数,再利用Matlab对相应的拍频数和频率进行曲线拟合,确定样品的固有频率,从而得到一种测量固体样品的杨氏模量的新方法。
Using the double grating,the Young＇s modulus of the solid material is measured dynamically.When the laser passes the sample reaching the resonance,the weak vibration displacement is magnified by the light grating signal by the double grating,the beat frequency is output by the oscilloscope,using Matlab to the corresponding frequency and frequency curve fitting and determine the natural frequency of the sample,and a new method of measuring young＇s modulus of solid samples.
作者
黄琪莉
钱圳
彭艺
方译权
雷海波
曾育锋
HUANG Qi-li;QIAN Zhen;PENG Yi;FANG Yi-quan;LEI Hai-bo;ZENG Yu-feng(South China Normal University,Guangdong Guangzhou 510006)
出处
《大学物理实验》
2018年第3期25-28,共4页
Physical Experiment of College
关键词
双光栅
光拍
共振
杨氏模量
MATLAB
double gratings
light beat
resonance
Young＇ s modulus
Matlab
