基于稳态视觉诱发电位的脑 机接口实验研究
An Experimental Research on Brain-Computer Interface Based on Steady State Visual Evoked Potential
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摘要: 为提取应用于脑 机接口系统的稳态视觉诱发电位信号(SSVEP),运用叠加平均与快速傅里叶变换(FFT)相结合的方法,由其频谱图上得到作为输入信号的稳态视觉诱发电位信号. 通过实验确定了叠加平均次数与最佳视觉刺激颜色,并对混合闪光刺激下SSVEP的提取进行了研究. 实验结果表明,该方法提取出的SSVEP信号能够反映使用者的控制意图,可应用于脑 机接口系统.Abstract: For acquiring steady state visual evoked potential(SSVEP)applied to brain-computer interface system, a method combining average and FFT is proposed. Input signal are obtained by their frequency figure of SSVEP. Times of average and best color of visual stimulation are confirmed by experiments. A method of acquiring SSVEP with mixed visual stimulation is studied. Experiments showed that SSVEP can reflect the control purposes of users and can be applied to BCI system.
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