重复经颅磁刺激电容充电技术的研究

Research of Capacitor Charging Technology of Repetitive Transcranial Magnetic Stimulation

本研究将高频串联谐振恒流充电技术应用到重复经颅磁刺激(r TMS)供电系统,充电电压误差保持在5%以内,刺激频率由原先的几赫兹提高到十几赫兹,有效地提高了r TMS供电系统的充电精度和充电速度。本研究还设计了以STM32为核心的数字控制系统,提高了电源的可控性,解决了传统模拟控制方式不可编程、可控性差的不足。最后搭建了实验样机,连入r TMS系统进行测试,工作在500 V时,r TMS刺激频率最高可以达到31 Hz;工作在1 000 V时,刺激频率最高可以达到20 Hz。

The high frequency series resonance constant current charging technology was used to the power supply system of repeti-tive transcranial magnetic stimulation （ rTMS） which effectively improved the efficiency and reliability of power system of rTMS. The charging voltage error was kept within 5% and the stimulated frequency increased from the original a few Hz to more than 10 Hz. We designed the digital control system choosing STM32 chip as the core , which improved the controllability of system , solved the problemsof unable to program and poor controllability caused by traditional analog control modem. Finally, we built experimental prototype con-necting the transcranial magetic stimulator, the stimulated frequency reached up to 31 Hz at 500 V and reach