發(fā)布時間：2018-06-17 05:37

  本文選題：便攜 + 模擬前端��； 參考：《電子科技大學(xué)》2014年碩士論文

【摘要】：腦電作為大腦活動的電信號表現(xiàn),以其很高的時間分辨率一直受到科研領(lǐng)域的廣泛重視。隨著科學(xué)技術(shù)的發(fā)展,之前一直作為臨床神經(jīng)診斷和認(rèn)知心理研究的腦電技術(shù),也被應(yīng)用到了神經(jīng)衰弱等疾病的診斷和治療。一些便攜式的腦電圖儀作為家用醫(yī)療設(shè)備也開始走向了普通家庭。本文的目的在于研究一種便攜式的、性能相對穩(wěn)定的腦電采集系統(tǒng),用作普通的腦機(jī)接口實驗和日常的家庭應(yīng)用。本系統(tǒng)主要包括集成模擬前端和數(shù)字部分。采用集成模擬前端代替集成運放來構(gòu)建放大和AD轉(zhuǎn)換電路,這樣一方面確保了系統(tǒng)的性能,另一方面也減小了系統(tǒng)的功耗和體積。采用高性能DSP芯片作為控制核心,確保了系統(tǒng)性能的穩(wěn)定。使用USB2.0作為數(shù)據(jù)傳輸協(xié)議,保證了多通道數(shù)據(jù)的快速、準(zhǔn)確傳輸。在軟件設(shè)計方面,優(yōu)化了上位機(jī)采集程序,加入了數(shù)字濾波程序,節(jié)約了硬件成本,減小了硬件體積,確保了系統(tǒng)的性能。為了驗證系統(tǒng)的性能,對其部分性能指標(biāo)進(jìn)行了測試,基本達(dá)到了便攜式腦電采集系統(tǒng)的需要。為了確保其能夠應(yīng)用在腦電采集中,進(jìn)行了腦電實驗,對被試的自發(fā)腦電進(jìn)行采集。從結(jié)果上分析,該系統(tǒng)能夠采集到基本的自發(fā)腦電信號——α波。說明本系統(tǒng)能夠應(yīng)用于簡單的腦機(jī)接口實驗和家庭應(yīng)用中。
[Abstract]:Electroencephalogram (EEG), as the electrical signal of brain activity, has been widely recognized in the field of scientific research with its high time resolution. With the development of science and technology, EEG technology, which has been used as clinical neural diagnosis and cognitive psychology, has also been applied to diagnosis and treatment of neurasthenia and other diseases. Some portable electroencephalogram (EEG) The purpose of this paper is to study a portable and relatively stable EEG acquisition system, which is used as an ordinary brain machine interface experiment and daily family application. This system mainly includes integrated analog front end and digital part. Integrated analog front end is used instead of integrated operation and amplifier. To build up the amplifier and AD conversion circuit, in this way, the performance of the system is ensured. On the other hand, the power and volume of the system are reduced. The high performance DSP chip is used as the control core to ensure the stability of the system performance. USB2.0 is used as a data transmission protocol to ensure the rapid and accurate transmission of multi-channel data. On the other hand, the PC acquisition program is optimized and the digital filter program is added to save the hardware cost, reduce the hardware volume and ensure the performance of the system. In order to verify the performance of the system, some performance indexes are tested, and the needs of the portable EEG collection system are basically achieved. The EEG experiment was carried out to collect the spontaneous EEG of the subjects. From the results, the system can collect the basic spontaneous EEG - alpha wave, which shows that this system can be applied to simple brain machine interface experiment and family application.
【學(xué)位授予單位】：電子科技大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TH789;R741.044
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本文編號：2029930