摘要
介绍了双线摆测量重力加速度实验装置改进的方法.该方法基于智能手机光学传感器、磁性传感器,利用手机软件phyphox APP记录摆球做简谐运动时光强或磁场强度的周期性变化数据,结合数据及周期图像,利用逐差法求得简谐振动周期.实验使用Matlab软件对周期和摆长进行最小二乘法线性拟合,最终通过拟合出的斜率求得重力加速度.
This paper introduces a method to improve the experimental device for measuring the gravity acceleration based on bifilar pendulum.The periodic data of the light intensity and magnetic field intensity are records with the optical sensor and magnetic sensor by the phyphox APP in the smart phone when the pendulum ball is generating simple harmonic motion.With data and the periodic change of the figure,the stepwise difference method is applied to obtain the simple harmonic vibration period.Also,Matlab software is adopted to perform a least squares linear fitting on the period and pendulum length,and finally the gravity acceleration is obtained through the slope of the fitting.
作者
刘赫
安世茂
杨龑
李晓欣(指导)
Liu He;An Shimao;Yang Yan;Li Xiaoxin(Special Police of China,Beijing 102211)
出处
《物理通报》
CAS
2022年第S02期98-101,106,共5页
Physics Bulletin
作者简介
刘赫(1996-),男,在读本科生;李晓欣(1986-),女,硕士,主要从事大学物理教学和大学物理实验教学
