摘要
针对人体表皮脑电信号特点提出了基于MCU与虚拟仪器的脑电信号采集系统。采用生物电信号前置放大电路、滤波电路、50Hz工频陷波电路、电平抬升电路有效滤除信号噪声并放大脑电信号,同时采用MSP430MCU高速采样技术和串口通信技术并结合LabVIEW开发上位机软件低成本地完成对脑电信号的数字化采集和实时波形显示。系统仿真和实验表明,系统能够有效地实时采集人体生物电信号,为脑机接口研究提供支持。
The EEG acquisition system is put forward based on the character of electrical signal of human scalp.The electric circuit that consists of biological signal preamplifier circuit,filter circuit,50 Hz frequency trap circuit can effectively filter the signal noise and amplify the EEG signals.Simultaneously,the system in which the technology of high-speed sampling and serial communication based on MSP430 microcontroller and PC software developed on LabVIEW are adopted could complete the work of digital EEG signal acquisition and real-time waveform display at low cost.The result of system circuit simulation and experiment of data acquisition test indicates that the system put forward could process human bioelectricity signal effectively in real time,and it could be a support for BCI research.
出处
《武汉理工大学学报》
CAS
CSCD
北大核心
2011年第7期152-156,共5页
Journal of Wuhan University of Technology
基金
湖北省国际合作重点项目(2009BFA006)
武汉理工大学自主创新基金(201-ZY-XX-002)
