利用智能手机和自制复摆测量重力加速度  

Measurement of Gravitational Acceleration Based on Smartphone and Self-made Compound Pendulum

作　　者：张顺 肖帅 曹静 袁鹤 王纯 吕宪魁[1] 郑永刚[1] 刘文广[1] ZHANG Shun;XIAO Shuai;CAO Jing;YUAN He;WANG Chun;Lü Xiankui;ZHENG Yonggang;LIU Wenguang(School of Physics and Electronic Information,Yunnan Normal University,Kunming 650500,China;National Middle School of Chuxiong Yi Autonomous Prefecture,Yunnan Province,Chuxiong 675000,China;Xi’An No.26 Middle School,Xi’An 710000,China)

机构地区：[1]云南师范大学物理与电子信息学院,云南昆明650500 [2]云南省楚雄彝族自治州民族中学,云南楚雄675000 [3]西安市二十六中学,陕西西安710000

出　　处：《大学物理实验》2022年第5期109-112,共4页Physical Experiment of College

基　　金：云南师范大学2020年本科线下一流课程建设项目“基础物理实验”(2020xxkc52);云南省省级线下一流课程项目“基础物理学实验(二)”;2021年西南地区物理学术竞赛类教育教学改革研究项目(SWPTJG2105)。

摘　　要：自制了一款可采集手机偏转角和角速度的手机软件,结合自制的等臂复摆,从能量守恒出发,利用自制手机APP,测量自制复摆转动时的偏转角和角速度。对偏转角的余弦值和角速度的平方进行线性拟合,最终通过拟合直线的斜率得到重力加速的值,结果较好,实验操作简单,无小角度摆动的限制。A mobile phone software that can collect the deflection angle and angular velocity of the mobile phone is made.Combined with the self-made isometric pendulum,starting from the energy conservation,the self-made mobile app is used to measure the deflection angle and angular velocity of the self-made compound pendulum.Linear fitting is performed on the cos ine value of the deflection angle and the square of the angular velocity,and finally the value of the gravitational acceleration is obtained by fitting the slope of the straight line.

关 键 词：重力加速度 复摆 大角度摆动 自制手机APP 

分 类 号：O4-33[理学—物理]