基于智能手机传感器和phyphox软件精确测量刚体转动惯量  

Accurately Measuring the Moment of Inertia of Rigid Body Based on Smartphone Sensor and Phyphox Software

作　　者：贺梓凇 焦梦鸽 江宜航 周建成 雷衍连[1] 贾伟尧[1] 张巧明[1] HE Zisong;JIAO Mengge;JIANG Yihang;ZHOU Jiancheng;LEI Yanlian;JIA Weiyao;ZHANG Qiaoming(School of Physical Science and Technology,Southwest University,Chongqing 400715,China)

机构地区：[1]西南大学物理科学与技术学院,重庆400715

出　　处：《实验科学与技术》2023年第4期32-36,共5页Experiment Science and Technology

基　　金：重庆市教委科学技术研究项目(KJQN202100215);西南大学教育教学改革项目(2022JY069,2022JY010,2021JY085);西南大学专业核心课程建设项目(2022年);教育部产学合作协同育人项目(220603117280342);教育部产学合作创新创业项目(2209031172023708)。

摘　　要：“刚体转动惯量的测量”是全国大多数高校大学物理实验课程的必做项目。传统方法是利用光电门和智能计时计数器来测定刚体转动过程中的角加速度,并根据公式计算出转动惯量。但该方法存在仪器组成复杂、角加速度测量精度低等问题。该文利用可安装phyphox软件的智能手机终端,调用手机内置传感器来测量刚体的角加速度,最终得到更加精确的转动惯量。新的测量方法表明,智能手机在大学物理实验精度改进上具有成本低、精度高、操作简单等优势,展现了巨大的应用潜力。Measuring the moment of inertia of rigid body is a required item in college physics experiment in most universities.The traditional method employs the photoelectric gate and millisecond meter to measure the angular acceleration of rigid body during rotation,and subsequently obtains its moment of inertia.However,this method not only needs complex instruments,but also has low measurement accuracy.In this work,a smartphone with phyphox software has been employed to accurately measure the angular acceleration of the rigid body and then obtains its moment of inertia thanks to the high precision sensor in the smartphone.Hence,our current work evidences that smartphone exhibits high potential on improving the precision of college physics experiments with low cost,high precision,and simple operation.

关 键 词：智能手机 传感器 phyphox 转动惯量 测量精度 

分 类 号：O4-33[理学—物理]