Design of Portable Multi-Channel EEG Signal Acquisition System

Lin Zhu, Haifeng Chen, Xu Zhang, Kai Guo, Shujing Wang, Yu Wang, Weihua Pei, Hongda Chen
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引用次数: 19

Abstract

A portable multi-channel electroencephalography (EEG) signal acquisition system operated by battery is designed in this paper. EEG is a recording of the electrical activity of the brain from the scalp and the recorded waveforms provide insights into the dynamic aspects of brain activity. The amplifier with a bandwidth of 0.8-35Hz is designed by use of integrated circuits such as the low-power instrumentation amplifier AD623, low-power, high gain operational amplifiers TLC27L4, etc. The amplified EEG signals are digitized by an A/D (analog to digital) converter built-in MSP 430 MCU (micro-controller unit). The digitized signals are transmitted to a PC by a wired serial port or stored in the SD (secure digital) memory card. Experimental results show that the system could implement the acquisition and storage of the EEG signals efficiently. This system would be of benefit to all involved in the use of EEG for clinical diagnosis and monitoring, or even BCI (brain computer interface).
便携式多通道脑电信号采集系统的设计
设计了一种电池供电的便携式多通道脑电图信号采集系统。脑电图是一种来自头皮的大脑电活动的记录,记录的波形提供了对大脑活动动态方面的见解。利用低功耗仪表放大器AD623、低功耗高增益运算放大器TLC27L4等集成电路,设计了带宽为0.8-35Hz的放大器。放大后的脑电图信号通过内置msp430单片机的A/D(模数)转换器进行数字化处理。数字化信号通过有线串行口传输到PC机或存储在SD(安全数字)存储卡中。实验结果表明,该系统能够有效地实现脑电信号的采集和存储。该系统将有利于所有参与脑电图临床诊断和监测,甚至BCI(脑机接口)。
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