摘要
提出一种测量微小伸长量的光电测量方法,即利用CCD光电测量系统将单缝衍射的光强分布转换为电信号,经过计算机处理后输出光强分布曲线,从相邻波谷读出衍射条纹间隔,通过软件的简单操作直接输出测量结果.实现了数据采集及运算结果的实时化、半自动化,并克服了传统方法的测量困难和数据处理的复杂计算.利用这一方法测定了钢丝的杨氏弹性模量,与标称值符合得较好.
A new method of measuring small extention is put forward. The light intensity of single slit diffraction is converted to electric signal by CCD photo-electric measuring system and outputs curve of light intensity distribution after computer processing. Read the interval of diffraction marking from adjacent wave through and output results through simple operation of software. It implements date acquisition and operation results real-timely and semiautomaticly. It overcomes the difficulty of conventional measurement method and complex calculation of date-processing. The Young＇ s modulus of elasticity is measured by this method and the results agree with the nominal value very well.
出处
《大学物理》
北大核心
2006年第1期47-49,共3页
College Physics
基金
重庆市教委项目基金资助项目(041303)
