悬浮牵引演示实验仪的原理与设计

PRINCIPLE AND DESIGN OF DEMONSTRATION EXPERIMENT INSTRUMENT FOR SUSPENSION TRACTION

抗磁性概念及其物理机制是电磁学课程中的重要内容,它使得抗磁材料有可能悬浮在磁场中。为了提高抗磁性物理原理的教学效果,文章中设计制作了磁悬浮牵引演示实验仪。该装置能够清晰稳定地演示二维平台上激光牵引磁悬浮热解石墨移动的现象,包括直线牵引和旋转牵引。通过comsol仿真计算和实验,确定了演示效果最明显的两种磁铁排列方式:双层N/S交错排列和N/S反向排列。该装置由移动导轨、磁铁平台、激光笔、石墨等部分组成,结构简单,成本低廉,可以应用于科学研究或者物理实验教学。

Diamagnetism and the relevant physical mechanism are significant contents in the course of electromagnetics.It makes it possible for diamagnetic materials to suspend in magnetic field.A magnetic suspension traction experimental demonstrator is designed and created in order to facilitate the teaching effect of the diamagnetic principle.This demonstrator can show a maglev pyrolysis graphite movement in laser traction steadily on a 2-D platform,including the linear traction and rotating traction.Through the simulation in COMSOL and experiments,two optimal magnets arrangement modes with the most obvious demonstration effect are determined,which are the staggered double-layer N-S arrangement and reversed N-S arrangement.The experimental device is composed of the guide rails,magnet,laser pointer and graphite.Moreover,the device is simple and low-cost,and can be used in scientific research or physical experiment teaching.