μV级脑电信号采集系统的关键技术  

The Key Technologies of μV-level EEG Acquisition System

作　　者：黄河涛[1] 杜玉晓[2] 董建[2] 

机构地区：[1]南阳师范学院计算机与信息技术学院,河南南阳473061 [2]广东工业大学自动化学院,广东广州510006

出　　处：《实验室研究与探索》2009年第9期72-76,共5页Research and Exploration In Laboratory

摘　　要：μV级脑电信号采集技术是生物电信号检测的一个瓶颈,在保证足够高的信号增益前提下有效抑制外界干扰是μV级脑电信号采集的关键问题。以C3+C4电极电位平均作为单极导联公共参考电极,结合Z电极电位反馈控制技术、50 Hz工频干扰抑制技术和基于高速串行AD的多导联同步信号采集技术,在不采用前端50 Hz工频陷波器的前提下,将外界干扰尤其是50 Hz工频干扰有效地抑制,得到较好脑电波原始信号波形。μV-level EEG acquisition technology is a bottleneck of biology electrical signal detection technology and in the μV-level EEG acquisition process of how to curb outside interference effectively at high enough signal gain is the key to success for EEG system research. This paper mainly introduced that the common reference electrode technology of sin- gle-stage AVL by C3 ＋ C4 electrode potential and Z electrode potential feedback control, the industril frequency interfer- ence suppression techniques of 50 Hz and the synchronous signal accquisition technology of AVL based on the high- speed serial AD as the core, may curb effectively the outside interference, especially 50 Hz interference, without 50 Hz notch filter. The reasearch and application of this technology is of great significance for the brain neuroscience research, clinical diagnosis and rehabilitation medicine.

关 键 词：脑电图 μV级脑电信号 工频干扰 高速同步数据采集 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置]