摘要
本文是在新冠肺炎疫情的大背景下,基于智能手机设计了日落时差法、太阳仰角差值法和GPS定位法三种方法进行地球半径的测量,本文所提供的实验方法不需要专业的物理实验测量工具并可以居家完成,其中日落时差法和太阳仰角法测量得到的地球半径分别为6246km和6239km,测量的相对误差分别为2.0%和2.1%;GPS定位法中设计了同经度取点、同纬度取点和任意取点三种取点方法,测量得到的地球半径分别为6432km、6400km、6343km,测量的相对误差可以达到1.0%、0.5%和0.4%。本文所有方法的误差精度都可以满足基础物理实验课程设计的要求,GPS定位法的测量精度要明显优于日落时差法和太阳仰角法。同时本文还分析了各方法测量误差最主要的影响因素。
This paper designs three methods of the earth’s radius measurement,the sunset time difference method,the sun elevation difference method and GPS positioning method,which is in the context of COVID-19 outbreak and based on the smart phone.These experimental methods provided in this paper don’t need professional physics experiment measuring tool and can be completed at home.The earth radius measured by the sunset time difference method and the sun elevation method are 6246 km and 6239 km with the measuring relative errors 2.0%and 2.1%,respectively.In the GPS positioning method,three point taking methods are designed including the point taking at the same longitude,at the same latitude and any point.The measured earth radius are 6432 km,6400 km and 6343 km respectively,and the measuring relative error can reach 1.0%,0.5%and 0.4%respectively.The error accuracy of all methods in this paper can meet the requirements of basic physics experiment course design,and the measurement accuracy of GPS positioning method is obviously better than sunset time difference method and solar elevation method.At the same time,the main influencing factors of measurement error are also analyzed.
作者
杨子源
翟立朋
毛胜春
李友群
YANG Ziyuan;ZHAI Lipeng;MAO Shengchun;LI Youqun(School of Electrical Engineering,Xi'an Jiaotong University,Xi'an,Shaanxi 710049;National College Physics Experimental Teaching Demonstration Center,School of Physics,Xi'an Jiaotong University,Xi'an,Shaanxi 710049)
出处
《物理与工程》
2022年第2期133-139,共7页
Physics and Engineering
基金
陕西省重点研发计划(2020GY-274)
2020年西安交通大学本科教学改革研究(拔尖专项)项目(20BJ02Y)
关键词
智能手机
地球半径
居家实验
smartphone
earth radius
home physics experiment
作者简介
通讯作者:翟立朋,男,工程师,主要从事物理实验教学的设计与研究工作,科研方向为贵金属纳米材料表面等离子光学性能研究,zhailp2018@xjtu.edu.cn
