摘要
基于拉伸法测量金属丝的杨氏模量这一实验,把改进后的激光光杠杆,应用到人体称重上.根据位移量与所加重物质量成线性关系,通过数据采集和编程,将体重通过液晶显示出来,设计制作成激光直射式CCD体重计.测量结果显示,精确度可以到0.01kg,拓展了杨氏模量的应用方向,启发同学们的发散思维,将物理实验与生活实践紧密相连.
Base on the experiment of Young＇s modulus, in which the metal wire is measured by the tensile method, the improved laser optical lever is applied to the human weight mea- surement. According to linear relation between the displacement and mass, the laser straight CCD weighing machine is made, and the human mass is shown on the liquid crystal display by data acquisition and processing. The measurement results show that the accuracy of the hu-man mass can achieve 0. 01kg. This work broadens out the application range of Young＇s mo-dulus, inspires the divergent thinking of students, and links the physics experiment to the li-ving practice tightly.
出处
《物理与工程》
2013年第5期22-24,共3页
Physics and Engineering
基金
江苏省自然科学基金面上项目资助
项目编号BK2011397
关键词
杨氏模量
光杠杆
CCD光强测量分布仪
体重计
Young＇s modulus
optical lever
light intensity distribution measurementinstru-ment
weighing machine
