摘要
利用弹簧振子在竖直方向做简谐振动实验测出了本地的重力加速度,在弹簧振子下端安装小光源,小光源的下方放置智能手机,利用智能手机中的光线传感器软件获得光照度实时变化的数据及光照度随时间的变化图像,根据该图像得到弹簧振子做简谐振动的周期,这种测弹簧振子振动周期的方法消除了人工计时误差较大的缺点,提高了测量的精度,利用重力加速度与周期的关系求得本地的重力加速度.实验结果表明:该方法操作简易,结果较为准确.
The local acceleration of gravity is measured by the simple harmonic vibration experiment of spring vibrator in vertical direction.By installling a small light source at the lower end of the spring vibrator and placing the smart phone below the small light source,the real-time data of illuminance change and the image of illuminance changing with time are obtained by using the light sensor software in smart phone.According to the real-time change data of illuminance and the change image of illuminance with time,the period of the simple harmonic vibration of the spring oscillator is obtained.This method of measuring the period of spring vibrator eliminates the disadvantage of large error of manual timing and the accuracy of measurement is improved.Using the relationship between gravity acceleration and period,the local gravity acceleration can be obtained.The experimental results show that the method is simple and accurate.
作者
官邦贵
高海涛
左绪忠
郭明磊
董杰
GUAN Bang-gui;GAO Hai-tao;ZUO Xu-zhong;GUO Ming-lei;DONG Jie(College of Electrical and Electronic Engineering,Anhui Science and Technology University,Bengbu 233030,Anhui,China)
出处
《韶关学院学报》
2021年第6期28-32,共5页
Journal of Shaoguan University
基金
安徽省高等学校省级教学研究项目(2018jyxm0679)
安徽省精品开放课程(2017kfk076)
安徽省大学生创客实验室(2016ckjh064).
关键词
简谐振动
光线传感器
重力加速度
simple harmonic vibration
light sensor
gravitational acceleration
