抗磁悬浮热解石墨的光牵引运动仿真研究

Simulation Study on Optical Driving Mechanism of Diamagnetic Levitation Pyrolytic Graphite

摘要: 抗磁悬浮热解石墨的光学驱动实现了光对较大物体的直接操纵，其具有远程控制与无接触的特点，无需使用额外的导线连接来实现供源。目前基于该现象的相关光驱动机理仍有待完善，特别是在特定的磁场环境下不同激光辐照方式对驱动物体运动方式的影响情况，目前仍缺少有效的研究方法。为此，本文采用理论模拟的方法，针对热解石墨片在矩形阵列磁体上方沿激光辐照方向移动这一现象，通过计算并分析热解石墨片在光驱动过程中相关物理量的变化来说明其驱动机理。首先介绍了抗磁悬浮光驱动现象中的相关物理量及其计算方法，然后建立了基于磁场与热场耦合的抗磁悬浮光驱动仿真模型，通过该模型成功得到了热解石墨片在激光辐照下不同磁场位置的磁势能及水平驱动力变化，据此解释了该现象。设置了相关实验进行验证，模拟结果与实验现象具有很好的一致性。此外基于磁热耦合的激光驱动模型，对于分析类似的，如光驱旋转运动也同样适用，分析结果为磁悬浮光驱动器械及新型光能采集系统的设计提供了参考。

Abstract: The optical drive of anti-magnetic levitation pyrolytic graphite realizes the direct manipulation of large objects by light. It has the characteristics of remote control and non-contact, and does not need to use additional wire connection to realize power supply. At present, the related optical driving mechanism based on this phenomenon still needs to be improved, especially the influence of different laser irradiation methods on the motion mode of driving objects in a specific magnetic field environment, and there is still a lack of effective research methods. Therefore, this paper uses theoretical simulation method to explain the driving mechanism of pyrolytic graphite sheet by calculating and analyzing the changes of related physical quantities in the process of light driving, aiming at the phenomenon that pyrolytic graphite sheet moves in the direction of laser irradiation above rectangular array magnets. Firstly, the related physical quantities and their calculation methods in the phenomenon of anti-magnetic levitation optical drive are introduced, and then the simulation model of anti-magnetic levitation optical drive based on the coupling of magnetic field and thermal field is established. Through this model, the changes of magnetic potential energy and horizontal driving force of pyrolytic graphite sheet at different magnetic field positions under laser irradiation were successfully obtained, and the phenomenon was explained accordingly. In addition, related experiments are set up to verify, and the simulation results are in good agreement with the experimental phenomena. In addition, the laser driving model based on magneto-thermal coupling is also applicable to the analysis of similar rotation motion of optical drive, and the analysis results provide reference for the design of magnetic suspension optical driving equipment and new optical energy collection system.