摘要
为避免传统光杠杆拉伸法测定杨氏模量产生的实验误差,采用三角支架台的稳定性减少系统误差,通过精准施力装置更加精确高效地施加荷载,避免了因砝码摇晃所产生的误差,进而也保证了实验人员的安全,同时激光发射器的后端因受力影响使得激光发生微小角度的偏转,而激光照射到标尺上能够更加直观、更高精度地观察到变化量,替换掉了传统实验复杂的望远镜找像步骤,使得实验操作更加方便,节约了大部分实验时间,最后根据相应计算式得出更准确的数据。
In order to avoid the experimental error caused by the traditional optical lever stretching method in measuring Young’s modulus,the stability of the triangular support platform is used to reduce the system error,and the accurate force application device is used to apply the load more accurately and efficiently,so as to avoid the error caused by the weight shaking,thus ensuring the safety of the experimental personnel,at the same time,the back end of the laser transmitter is affected by the force,so that the laser occurs,when the laser irradiates on the ruler,the change can be observed more intuitively and accurately,which replaces the complex telescope image finding steps in traditional experiments,makes the experimental operation more convenient,saves most of the experimental time,and finally obtains more accurate data according to the corresponding calculation formula.
作者
石长青
蒋旭
李洁欣
罗浩
陈俊冬
马婷婷
SHI Changqing;JIANG Xu;LI Jiexin;LUO Hao;CHEN Jundong;MA Tingting(Southwest University of Science and Technology,Mianyang 621010,China)
出处
《大学物理实验》
2021年第2期37-40,共4页
Physical Experiment of College
基金
2020教育部大学物理教指委教改项目(DJZW202034XN)
2020西南地区物理学术竞赛类教育教学改革研究项目(SWPTJG2012)
西南科技大学高教研究专项项目(18gjzx36)
西南科技大学实验室技术项目(17syjs-09)
西南科技大学大学生创新基金项目精准资助专项(JZ20-015)。
关键词
拉伸法
实验误差
三角支架台
精准施力装置
激光发射器
stretching method
experimental error
triangle support platform
precise force application device
laser transmitter
