中文摘要：

针对现有脑电采集设备成本高、不便携等问题,设计了一套16通道脑电采集系统。该系统具有优化电源,可以电池供电;级联多个模拟前端扩展为多通道的脑电采集系统,并通过片选信号选择所需通道数,以动态和个性化的方式配置每个通道;通过高速无线模块将脑电信号发送至上位机。为测试系统性能,分别采集、分析了5位被试者的自发脑电信号和稳态视觉诱发脑电信号。自发脑电闭眼时出现明显的α节律;稳态视觉诱发脑电信号在对应的刺激频率和谐波上出现谱峰。实验结果表明：该采集系统可准确采集到人体自发脑电和诱发脑电信号,并可用于脑机接口应用领域,具有一定理论与应用价值。

英文摘要：

In this paper,a 16-channel EEG acquisition system was designed regarding present problems of high cost and not portable.The system was with optimized power supply and could be powered by battery.Multiple analog front ends were cascaded in order to design multi-channel EEG acquisition system.Required channels were selected according to chip selecting signal and thus,each channel could be configured in a dynamic and personalized manner.EEG signals were sent to the host computer through the high-speed wireless module.In order to test system performance,EEG signals of five subjects from spontaneous state and steady-state visual evoked experiment were collected and analyzed.Obvious alpha rhythm appeared during eyes-closed in sponta-neous EEG signals.Peak values appeared at the corresponding stimulating frequency and harmonics in steady-state visual evoked experiment.The results show that the acquisition system could accurately collect spontaneous EEG signals and evoked EEG signals.The system could be used in applications of brain computer interface,and it has certain theoretical and practical value.