基于诱发脑电的人机交互系统的设计与实现

提出一种基于稳态视觉诱发脑电（SSVEP）的人机交互控制系统的设计方法。该系统采用闪烁刺激使操作者产生SSVEP信号，通过采集电路将信号送入PC中，由软件对其进一步处理和分析，提取出刺激器的闪烁频率，进而转换成相应的控制命令控制机械手臂操作。由于采用软硬件相结合的刺激源、信号逐级放大的电露设计、程序在线检测算法等，系统具有很好的人机交互的实时性和稳定性。检测算法对SSVEP的识别准确率达到90％以上。

Design and Implementation of HCI System Based on VEP

This paper proposes the design method of a HCI system based on VEP.This system uses the twinkle stimulation to induce the operator to produce SSVEP signals, and the software will act further treatment and analysis after signals were sent into the PC via an acquisition circuit,the twinkle frequency of stimulator will be extracted and converted into corresponding commands to control a mechanical arm.Due to the design proposal of stimulator which is based on combination of software and hardware,circuit that enlarges signal gradually and the online examination algorithm.