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首页> 外文会议>World Congress on Medical Physics and Biomedical Engineering >Robotic Wheelchair Commanded by People with Disabilities Using Low/High-Frequency SSVEP-based BCI
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Robotic Wheelchair Commanded by People with Disabilities Using Low/High-Frequency SSVEP-based BCI

机译：使用低/高频SSVEP的BCI，残疾人的机器人轮椅指挥

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摘要

Brain-Computer Interfaces (BCIs) are systems developed to improve the daily life of people with disabilities. Nevertheless, this assistive technology is yet far away from the patients' home and the BCI should adapt to the requirements of the user. This paper presents a practical BCI based on Steady-State Visual Evoked Potentials (SSVEP) currently being used by people with disabilities. The BCI was applied to navigate a wheelchair at two ranges of SSVEP frequency, increasing the possibilities of its application. Two stimulation systems were used: checkerboards flickering at low-frequency range and LED flickering at high-frequency range. Five volunteers with disabilities tested the SSVEP-based BCI. They attempted to command the wheelchair in order to accomplish four different navigation tasks. Then, the volunteers answered a questionnaire about their comfort and performance. Average accuracy detections of 54% and 51% were achieved at low-and high-frequency stimulation, respectively. Volunteers reported lesser visual tiredness when high-frequency LED stimuli were used. The flexible BCI system here developed showed that people with disabilities could operate a robotic wheelchair using visual stimuli in two ranges of frequency. Moreover, preliminary results indicated that visual stimuli flickering at high frequency were more comfortable than low frequency stimuli.
机译：脑电脑界面（BCIS）是为改善残疾人日常生活而开发的系统。尽管如此，这项辅助技术还远离患者的家园，BCI应适应用户的要求。本文提出了一种基于稳态视觉诱发电位（SSVEP）目前用于残疾人使用的实用BCI。将BCI应用于在两个SSVEP频率的两个范围内导航轮椅，提高其应用的可能性。使用了两个刺激系统：在低频范围内闪烁的棋盘，在高频范围内闪烁。五名残疾志愿者测试了基于SSVEP的BCI。他们试图命令轮椅才能完成四个不同的导航任务。然后，志愿者对他们的舒适性和表现回答了问卷。平均精度检测分别在低和高频刺激下实现了54％和51％。志愿者报告使用高频LED刺激时较小的视觉疲劳。这里的灵活的BCI系统开发展示了残疾人可以在两个频率范围内使用视觉刺激操作机器人轮椅。此外，初步结果表明，高频闪烁的视觉刺激比低频刺激更舒适。

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