矩形阵列磁悬浮热解石墨片光驱转动的研究  

Optical rotation control of pyrolytic graphite magnetically levitated on square-arrayed magnet

作　　者：黄晓杰 余明芯 张大伟[1] 李建郎 HUANG Xiaojie;YU Mingxin;ZHANG Dawei;LI Jianlang(School of Optical-Electrical and Computer Engineering,University of Shanghai for Science and Technology,Shanghai 200093,China)

机构地区：[1]上海理工大学光电信息与计算机工程学院,上海200093

出　　处：《光学仪器》2024年第4期74-80,共7页Optical Instruments

基　　金：国家重点研究发展计划(2020YFB2007504);国家自然科学基金(62175245);上海市地方高校能力建设项目(22010503200)。

摘　　要：研究了悬浮在矩形永磁铁阵列上方的圆形热解石墨片的光驱转动。结合理论公式,用MATLAB计算得到永磁铁阵列在悬浮高度为1 mm处的磁场分布。热解石墨片的扭矩随激光照射点旋转角度、沿半径不同距离和激光功率发生变化。用808 nm的激光照射热解石墨片,当激光照射x=0,y=0,y=x和y=-x分界线时,热解石墨片不转动。当激光照射Ⅰ,Ⅲ,Ⅴ,Ⅶ或Ⅱ,Ⅳ,Ⅵ,Ⅷ区域时,热解石墨片顺时针或逆时针旋转。热解石墨片的转速随激光照射点沿半径向外先增大后减小,随激光功率的增大而增大。实验和计算结果一致,得到了悬浮在矩形永磁铁阵列上方的圆形热解石墨片光驱动规律。In this paper,the optical rotation control of pyrolytic graphite disk suspend above a rectangular permanent magnet array is investigated.Using MATLAB to simulate the magnetic field distribution of the permanent magnet array at a levitation height of 1 mm,and the variation of torque of pyrolytic graphite disk with rotation angle of laser irradiation point,different distances along the radius and laser power.Using a laser with a wavelength of 808 nm to irradiate pyrolytic graphite disk,it was observed that when the laser was irradiated on the boundaries of x=0,y=0,y=x,and y=−x,the pyrolytic graphite disk was stationary.The pyrolytic graphite disk rotated clockwise or counterclockwise when the laser irradiated the regionsⅠ,Ⅲ,Ⅴ,ⅦorⅡ,Ⅳ,Ⅵ,Ⅷ.As the laser irradiation point moved outward along the radius,the rotational speed of the pyrolytic graphite disk increased first,and then decreased.The rotational speed of pyrolytic graphite disk increased with the laser power.The experimental results and the calculated torque are consistent.The light driving law of a circular pyrolytic graphite sheet suspended above a rectangular permanent magnet array is obtained.

关 键 词：磁悬浮 热解石墨 永磁铁 光驱转动 

分 类 号：TN201[电子电信—物理电子学]