集成技术Issue(5)：54-62,9.
基于STM32的脑电信号采集系统设计
Design of Electroencephalogram Acquisition System Based on STM32
摘要
Abstract
Electroencephalogram(EEG) contains a large amount of brain function state information, and has been widely applied in many ifelds, such as cranial nerve disease diagnosis, brain-computer interface, and sleep stage and anesthetic depth monitoring. EEG is a weak bio-electric signal, whose amplitude is just microvolt and frequency is lower than 150 Hz. Since EEG is easily interfered by signals, like electro-oculogram and electrocardiogram, effective extraction of EEG is key to EEG analysis. An EEG acquisition system based on STM32 was designed to realize effective acquisition of EEG. In this system, EEG signals were sensed by three lead biological electrodes on the forehead, then ampliifed through multistage ampliifcation in the front analog circuit and ifltered by passive iflter or active iflters. Meanwhile, electrical level rising circuit and electrode connection state detection circuit were also added in. After that, EEG signals were converted to digital value by 12 bit analog-to-digital converter, and then transferred to upper computer via bluetooth module to realize effective extraction and transmission, providing the basis for further processing and analysis. The effectiveness of this EEG acquisition system was veriifed by comparing output with other similar products.关键词
脑电/前置放大/滤波/A/D转换/STM32Key words
EEG/preampliifcation/iflter/analog-to-digital converter/STM32分类
医药卫生引用本文复制引用
王琼颖,张宏民,李竹琴,刘志勇,王乐凡,孙金玮..基于STM32的脑电信号采集系统设计[J].集成技术,2015,(5):54-62,9.基金项目
哈尔滨工业大学理工医交叉学科基础研究培育计划(HIT. IBRSEM.2013005)；海口市2013年科技计划项目(2013-02) （HIT. IBRSEM.2013005）
