经穴磁刺激线圈优化设计与仿真

经穴磁刺激与传统针灸、电刺激相比具有无创伤、无不适感、易重复和进行深部刺激等独特优点.磁刺激系统中载流线圈设计对磁场强度和磁场分布具有重要作用.在理论分析载流线圈磁场分布基础上,设计了不同8字形和碗状结构磁刺激线圈,并采用Ansys有限元分析软件对线圈沿径向和轴向产生的磁场分布进行仿真,研究8字形和碗状结构线圈的磁场聚焦性和刺激深度.结果表明,碗状线圈具有较好的磁场聚焦性且有一定的刺激深度,在皮层下1.5～2 cm左右仍有3～10 mT的磁场强度.同时获得了适合于经穴磁刺激系统的最佳线圈形状和参数,为穴位磁刺激技术应用于临床治疗奠定了良好基础.

Optimization Design and Simulation of Magnetic Coil for Acupoint Stimulation

Compared with traditional acupuncture and electrical stimulation,magnetic acupoint stimulation has many unique advantages,such as noninvasive cure,no uncomfortable sensation,easily repeating and deep stimulation.The design of current-carrying coil in magnetic stimulation system plays an important role in magnetic intensity and magnetic field distribution.On the basis of theoretically analyzing the magnetic field distribution of current-carrying coil,we designed the different figure-of-eight and bowl-shaped coils,simulated the magnetic field distribution along axial and radial direction using Ansys software of finite element analysis,and researched the magnetic focus and stimulative depth of figure-of-eight and bowl shaped coils.The results show that the bowl-shaped coils behave better magnetic focus and stimulative depth. There is still 3～10 mT magnetic intensity at 1.5～2 cm position under the skin.Meanwhile,the optimal coil shape and parameters are obtained for suitable magnetic acupoint stimulation system.And this research provides a good foundation for magnetic acupoint stimulation technology in clinical cure.