基于阵列电极的生物电刺激器研制

Development of a biological electrical stimulator based on array electrodes

目的:设计制作一种用于阵列电极的便携式生物电刺激器。方法:下位机采用STM32L432KC作为硬件核心,设计小型DC-DC升压模块和光电隔离式双极性压控恒流源,通过串并转换芯片和光耦合双向可控硅选通电极输出电流;上位机采用Eclipse开发了在嵌入式Android系统下的人机交互软件,可以通过蓝牙模块以无线的方式灵活调节刺激电流幅值、脉宽、频率和电极选择方案。结果:刺激器能够选择最佳的刺激位点和刺激强度,为生物电刺激的临床应用和科学研究提供便利。结论:该仪器体积小、稳定性好、功耗低、操作方便,具有临床研究与推广价值。

Objective To design and develop a portable biological electrical stimulator base on array electrodes. Methods The slave computer used STM32L432KC as hardware core. A small DC-DC booster module and a bipolar voltage controlled current source of photoelectric isolation which can output current to gating electrodes through serial-parallel conversion chip and photocouplers bidirectional thyristor were designed. The PC used human-computer interactive software in the embedded Android system developed by Eclipse. The amplitude, pulse width and frequency of stimulation current and the electrode selection plan were adjusted by a Bluetooth module, wirelessly and flexibly. Results The stimulator was capable of choosing the best stimulation sites and intensity, bringing convenience to the clinical applications and scientific researches for biological electrical stimulation. Conclusion The stimulator is worthy of clinical research and application, with the advantages of small size, good stability, low power and easy operation.