北京生物醫(yī)學工程

一種基于MSP430的便攜式腦電實時采集分析系統(tǒng)

A portable EEG real-time acquisition and analysis system based on MSP430

作者：唐晉張春雨劉偉峰唐曉英

單位：                                 北京理工大學生命學院（北京100081）            

關鍵詞：腦電采集；MSP430單片機；實時性；便攜式

分類號：

出版年·卷·期（頁碼）：2015·34·1（79-84）

摘要：

目的設計了一種基于MSP430的小型便攜式腦電實時采集分析系統(tǒng)，以方便迅速地采集腦電并進行實時分析。方法根據(jù)腦電信號特性，設計了前端放大電路及濾波電路。系統(tǒng)以MSP430為核心，信號采集后通過PL2303進行USB傳輸，同時，PC端接收數(shù)據(jù)并通過軟件實時處理。測試實驗時，借助信號發(fā)生器產生理想信號，經A/D轉換后，在MSP430控制下通過USB傳輸?shù)絇C端并進行實時處理。結果經多次試驗，使用該系統(tǒng)在PC端得到較好的信號。后續(xù)對正常人在午休（淺睡眠）和清醒放松（聽音樂）兩種狀態(tài)下進行實測及實時頻域分析，得到較好結果。結論該系統(tǒng)便于攜帶，使用方便，實用性強，特別適用于高等院校實驗室科學研究，應用潛力大。

Objective A portable EEG real-time acquisition and analysis system based on MSP430 was designed. Methods According to EEG characteristics, front-end amplifier circuit and filter circuit were designed. MSP430 was chosen as the core in this system. After acquisition, the signal data were transferred to PC by USB through PL2303. The data were received by PC and processed by software in real-time. In text experiment, the ideal signal produced by a signal generator was conversed by an AD converter. Under the control of MSP430, the signal was transmitted to the PC through the USB port and was processed in real-time. Results An acceptable signal was obtained at PC by using this system. In the following text, the EEG signals of a normal subject under two states: lunch break (light sleep) and wakefulness relax (listening to music), were obtained and analyzed in frequency domain in real-time. And the results were good. Conclusions The system is easy to carry and use, with wide application prospects, especially in college laboratories.

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