A universal functional electrical stimulator based on merged flyback-SC circuit
A universal functional electrical stimulator based on merged flyback-SC circuit
复制标题
一种基于合并反激-SC电路的通用功能性电刺激器
DOI：
10.1109/epepemc.2012.6397471
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发表时间：
2012
期刊：
影响因子：
--
通讯作者：
P. Lehn
中科院分区：
文献类型：
--
作者：
S. C. Huerta;Massimo Tarulli;A. Prodic;M. Popovic;P. Lehn
介绍了一种新的功能电刺激（FES）系统架构。与现有的最先进的解决方案[1]-[15]相比，FES系统大大增加了刺激脉冲的种类，减少了治疗的痛苦，并显著降低了功耗。此外，FES系统固有地为受激组织提供零净电荷，从而消除了对专用放电电路的需求。FES的关键元件是一种新型功率级，它融合了反激和开关电容（SC）变换器。反激电路提高电池电压并提供电流隔离。接下来的SC阶段产生零电荷高慢速脉冲，减少痛觉。输出电流脉冲的控制是通过集成的数字电压编程电流模式控制来完成的。新的FES系统在健全的个体上进行了测试。结果表明，与其他已知的解决方案相比，它产生的脉冲上升时间为10 ns，在相同的肌肉力量输出中，刺激能量减少了30%以上。结果还表明，与其他已知系统相比，所提出的FES系统需要的能量减少60%，从而在便携式应用中延长电池寿命。
This paper introduces novel functional electrical stimulation (FES) system architecture. Compared to the existing state of the art solutions [1]-[15], the presented FES system drastically increases variety of stimulation pulses, results in a less painful therapy and has significantly lower power consumption. Furthermore, the FES system inherently provides zero net charge of stimulated tissue eliminating the need for a dedicated discharging circuit. The key element of the FES is a novel power stage merging a flyback and switch-capacitor (SC) converters. The flyback steps up battery voltage and provides galvanic isolation. The following SC stage produces zero net charge high slew-rate pulses reducing pain sensation. The control of the output current pulses is performed through integrated digital voltage-programmed current mode control. The new FES system was tested with able bodied individuals. The results show that it produces pulses with a 10 ns rise time, which compared to other known solutions, result in the same muscle force output for 30+% less stimulation energy. The results also show that the presented FES system requires 60% less energy compared to other known systems allowing longer battery life in portable applications.