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| 基于抗磁悬浮热解石墨的光驱转动结构设计与研究 |
| Design and research on optical drive rotating structure of anti-magnetic levitation pyrolytic graphite |
| 投稿时间：2024-03-15 |
| DOI：10.3969/j.issn.1005-5630.202403150051 |
| 中文关键词: 抗磁悬浮 光驱转动 热解石墨 永磁体 |
| 英文关键词:anti-magnetic levitation optical drive rotation pyrolytic graphite permanent magnet |
| 基金项目:国家重点研发计划 (2020YFB2007504)；国家自然科学基金（62175245） |
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| 中文摘要: |
| 抗磁悬浮热解石墨光驱转动的实现，对于物体的光学操纵和光能量收集具有重要意义。磁悬浮热解石墨的光驱转动存在能量转化效率低，转速不高的问题。为此，提出采用调控磁悬浮热解石墨周围磁力场的方式来定向增强其旋转运动，并设计了一种具有圆形磁场缺陷的磁悬浮基底结构，提高了热解石墨在光照下的转动速度。首先，基于磁场理论与热传导理论建立数值分析模型，说明了磁悬浮热解石墨光驱转动的实现机理与运动规律；然后，用实验验证所设计的磁悬浮结构的光驱动效果。结果表明，在波长808 nm、功率200 mW的半导体激光驱动下，热解石墨的峰值转速达3.5 r/s。相比原有结构，在20～200 mW功率范围内，同等功率激光的驱动下，热解石墨的转速提高了1～2倍，且具有更好的稳定性与更低的转动阈值功率。该研究结果为光驱动旋转器件与新型光能采集系统的设计提供了参考。 |
| 英文摘要: |
| The optical drive movement of anti-magnetic levitation pyrolytic graphite is of great significance to the optical manipulation of objects and the acquisition of optical energy. At present, the existing rotating system of optical drive based on pyrolytic graphite has the problems of low rotating speed and low energy conversion efficiency. Therefore, it is proposed to adjust the magnetic field around the magnetic levitation pyrolytic graphite to directionally enhance its rotation. Specifically, a magnetic levitation base structure with circular magnetic field defects was designed to improve the rotation speed of pyrolytic graphite under irradiation. Firstly, based on the magnetic field theory and heat conduction theory, a numerical analysis model was established, and the realization mechanism and motion law of the magnetic levitation pyrolytic graphite optical drive were explained. Then the optical driving effect of the designed magnetic levitation structure was verified by experiments. The results showed that the maximum rotation speed of pyrolytic graphite was 3.5 r/s driven by semiconductor laser with wavelength of 808 nm and power of 200 mW. Compared with the original structure, in the power range of 20 to 200 mW, driven by the laser with the same optical power, the rotating speed of the pyrolytic graphite was increased by 1 to 2 times. It had better stability and lower rotation threshold power. The research results provide reference for the design of optical drive rotating devices and new optical energy collection systems. |
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