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首页> 外文期刊>Medical engineering & physics. >Commanding a robotic wheelchair with a high-frequency steady-state visual evoked potential based brain-computer interface
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Commanding a robotic wheelchair with a high-frequency steady-state visual evoked potential based brain-computer interface

机译：基于脑机接口命令具有高频稳态视觉诱发电位的机器人轮椅

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摘要

This work presents a brain-computer interface (BCI) used to operate a robotic wheelchair. The experiments were performed on 15 subjects (13 of them healthy). The BCI is based on steady-state visual-evoked potentials (SSVEP) and the stimuli flickering are performed at high frequency (37, 38, 39 and 40. Hz). This high frequency stimulation scheme can reduce or even eliminate visual fatigue, allowing the user to achieve a stable performance for long term BCI operation. The BCI system uses power-spectral density analysis associated to three bipolar electroencephalographic channels. As the results show, 2 subjects were reported as SSVEP-BCI illiterates (not able to use the BCI), and, consequently, 13 subjects (12 of them healthy) could navigate the wheelchair in a room with obstacles arranged in four distinct configurations. Volunteers expressed neither discomfort nor fatigue due to flickering stimulation. A transmission rate of up to 72.5. bits/min was obtained, with an average of 44.6. bits/min in four trials. These results show that people could effectively navigate a robotic wheelchair using a SSVEP-based BCI with high frequency flickering stimulation.
机译：这项工作介绍了用于操作机器人轮椅的脑机接口（BCI）。实验针对15位受试者（其中13位健康）进行。 BCI基于稳态视觉诱发电位（SSVEP），并且以高频（37、38、39和40. Hz）进行刺激闪烁。这种高频刺激方案可以减少甚至消除视觉疲劳，使用户可以长期BCI操作获得稳定的性能。 BCI系统使用与三个双极型脑电图通道相关的功率谱密度分析。结果显示，有2名受试者被报告为SSVEP-BCI文盲（无法使用BCI），因此，有13名受试者（其中12名健康）可以在房间内以四个不同的障碍物布置轮椅。志愿者没有因为闪烁的刺激而感到不适或疲劳。传输速率高达72.5。获得比特/分钟，平均为44.6。四个试验中的位/分钟。这些结果表明，人们可以使用具有高频闪烁刺激的基于SSVEP的BCI有效地操纵机器人轮椅。

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