基于液体粘滞系数仪测重力加速度  

Measure the acceleration of gravity based on a liquid viscosity coefficient meter

作　　者：廖欢 蔡彦 杜国芳 LIAO Huan;CAI Yan;DU Guofang(School of Physics and Information Engineering,Zhaotong University,Zhaotong 657000,China)

机构地区：[1]昭通学院物理与信息工程学院,云南昭通657000

出　　处：《高师理科学刊》2023年第9期87-90,94,共5页Journal of Science of Teachers＇College and University

基　　金：昭通学院教育教学改革研究项目(Ztjx2022011)。

摘　　要：在现代物理学中,重力加速度是物理研究的一种重要矢量,是在一般力学系统的力学研究中所必须考虑的一种主要参数,因此准确测量重力加速度对现代物理学研究具有重要意义.基于液体粘滞系数仪,通过消除空气阻力来减小实验误差,并考虑液层对小球速度的影响设计了自准直装置以使得小球沿中心轴线下落.采用了电磁感应和数字计时器相结合的方法来计时,减少了由于人工秒表计时带来的视差和反应误差,最终得到昭通昭阳区的重力加速度.并与当地公认标准值比较,发现误差较小,对于大学物理实验教学具有一定指导价值.In modern physics,gravity acceleration is an important vector of physical research,which is a major parameter that must be considered in the mechanical study of general mechanical system.Therefore,accurate measurement of gravity acceleration has great significance for the study of modern physics.Based on the liquid viscosity coefficient instrument,to reduce the experimental error by eliminate the air resistance,and consider the influence of the liquid sphere velocity designed the alignment device to make the ball falling along the central axis,using the combination of electromagnetic induction and digital timer to timing reduces the manual stopwatch timing disparity and reaction error.Finally get Zhaoyang District,Zhaotong City gravity acceleration,and compared with the local recognized standard value,found the error is small,for university physics experiment teaching has certain guiding value.

关 键 词：重力加速度 液体粘滞系数仪 物理学 

分 类 号：O31[理学—一般力学与力学基础] G642.0[理学—力学]