基于COMSOL的经颅磁刺激线圈设计与实现

Design and Implementation of Transcranial Magnetic Stimulation Coil Based on COMSOL

阐述经颅磁刺激仪(TMS)中刺激线圈与激励电路是最为核心的两个技术。基于COMSOL设计了一款针对0形线圈和8字形线圈的仿真App,可以实现自动建模并得出线圈的磁场分布及大小与相应的刺激深度与磁场强度的关系曲线,还可根据不同的需求更改激励源的电压和工作频率。设计的App能有效提高线圈的优化效率,避免了不同匝数,线径的线圈建模等重复性操作,根据不同的激励源选定相应的刺激电压与频率,定制出在此激励源下效果最好的O形线圈和8字形线圈,为线圈的优化提供依据。

This paper explains that the stimulation coil and excitation circuit are the two most core technologies in transcranial magnetic stimulation(TMS).Based on COMSOL,a simulation app has been designed for 0-shaped coils and 8-shaped coils.It can automatically model and obtain the relationship curve between the magnetic field distribution and size of the coil and the corresponding stimulation depth and magnetic field intensity.It can also change the voltage and working frequency of the excitation source according to different needs.Its designed app can effectively improve the optimization efficiency of the coil,avoiding repetitive operations such as modeling coils with different turns and wire diameters.Based on different excitation sources,the corresponding stimulation voltage and frequency are selected,and the best O-shaped coil and 8-shaped coil with this excitation source are customized,providing a basis for coil optimization.