摘要
制作设计一种简易的测量磁矩及地磁场水平分量的实验装置,采用智能手机内置的磁传感器以及霍尔传感器分别测量处于地磁场和通电线圈总磁场中磁铁的简谐振动周期,通过曲线拟合完成地磁场的水平分量及磁性材料磁矩的测量和计算,地磁场实验结果与中国科学院地质与地球物理研究所网站的实时观测数据相比相对误差范围为1.83%~1.98%,表明该实验装置和实验方法具有较高的准确性。该实验适用于普通物理实验或者设计性实验,有助于激发学生的实验兴趣,提高学生的动手能力与创新思维。
A simple geomagnetic field measurement device is self-made.The magnetic sensor in smart phones and Hall sensor are used to help measuring the period of simple harmonic vibration of the magnets in the geomagnetic field and the total magnetic field of electric coil,magnetic torque of the magnetic material and horizontal component of geomagnetic field are measured and calculated by curve fitting.Compared with the real-time observation data on the website of Institute of Geology and Geophysics of Chinese Academy of Sciences,the error of the results are within range of 1.83%~1.98%,indicating that the experimental device and method have high accuracy.The experimental design is suitable for general physics experiments or design experiments,which is helpful to stimulate students'interest in experiments and improve their practical ability and innovative thinking.
作者
赵丹丹
严旭阳
姜锴
马晨淼
祝威
Zhao Dandan;Yan Xuyang;Jiang Kai;Ma Chenmiao;Zhu Wei(School of Science,Tianjin University of Commerce,Tianjin 300134,China)
基金
2023年天津市普通高等学校本科教学质量与教学改革研究计划重点项目(A231006903)
教育部产学合作协同育人项目(220503181151644)。
关键词
地磁场
智能手机
周期
磁矩
简谐振动
geomagnetic field
smart phone
period
magnetic torque
simple harmonic vibration
