利用智能手机测定刚体转动惯量  

MEASUREMENT OF THE MOMENT OF INERTIA OF A RIGID BODY WITH A SMART PHONE

作　　者：李正天[1] 胡琦珩 冯一帆[1] 宋伊[1] 李啸越 丁益民[1] 

机构地区：[1]湖北大学物理与电子科学学院,湖北武汉430062

出　　处：《物理与工程》2017年第6期108-110,共3页Physics and Engineering

基　　金：物理学国家级特色专业建设项目(TS10985);湖北省大学生创新训练计划项目(201610512060)

摘　　要：基于传统方法,将智能手机与传统方法相结合,将其运用于传统三线摆测量刚体的转动惯量实验之中,利用智能手机自带的角速度传感器和SensorKinetics传感器软件,通过绘制"角速度—时间"图像来进行周期的计算,再将得到的两次周期数值代入原计算公式中,进而求得刚体转动惯量。经过多次实验后,利用智能手机得到的结果和传统方法相近,与理论值比较其相对误差也较小。在传统三线摆实验中运用智能手机不仅测量方便,而且增加了实验的趣味性和可操作性。By combining the smart phone with traditional method,this paper used smart phone in the moment of inertia measurement experiment based on the traditional three wire pendulum of rigid body,by the use of smart phone angular velocity sensor and the SensorKinetics software.Through drawing the＂angular velocity versus time＂ image,we calculated the period of cycle and obtained the moment of inertia by substituting two values of the period into the original formula.After repeated experiments,the results obtained by using smart phone is similar to the results obtained by tradition experiment.Its relative error is also small when it is compared with the theoretical value.This method is not only convenient,but also increases the interest and maneuverability of the experiment.

关 键 词：三线摆 转动惯量 智能手机 SensorKinetics 

分 类 号：O313.3[理学—一般力学与力学基础]