摘要
利用手机传感器设计了两个单摆实验.在测重力加速度实验中,借助磁传感器记录随单摆做简谐运动的磁铁,其磁感应强度随时间变化的情况,测得单摆运动的周期并计算重力加速度.在此基础上,拓展设计了有磁场作用的单摆实验,借助光线传感器记录变化磁场中单摆周期的变化情况.这种创新的实验方法不仅能辅助实验教学,还能促进学生实践科学学习活动,是手机传感器应用在物理实验中的发展方向.
Two experiments for studying the motion of a simple pendulum are designed by using smartphone sensors.In the experiment of measuring gravity acceleration,the magnetic induction intensity of a magnet moving harmonically with a simple pendulum is recorded by a magnetic sensor.The period of the motion of a simple pendulum is measured and the gravity acceleration is calculated.On this basis,the experiment of a simple pendulum with magnetic field is developed and recorded by a light sensor.This innovative experimental method can not only assist experimental teaching,but also promote students′practical scientific learning activities.It is the development direction of smartphone sensor application in physical experiments.
作者
刘利澜
李德安
Liu Lilan;Li Dean(School of Physics and Telecommunication Engineering,South China Normal University,Guangzhou,Guangdong 510006)
出处
《物理通报》
2020年第4期103-107,共5页
Physics Bulletin
关键词
磁传感器
光线传感器
磁铁
周期
magnetic sensor
light sensor
magnetic field
period