本文選題：腦-機(jī)接口(BCI)　切入點(diǎn)：主動(dòng)干電極　出處：《儀表技術(shù)與傳感器》2017年02期 　論文類(lèi)型：期刊論文

【摘要】：在傳統(tǒng)的腦電系統(tǒng)中,腦電信號(hào)采集使用的是濕電極,需要配合導(dǎo)電膏使用,糊狀的導(dǎo)電膏無(wú)論是使用前的逐個(gè)注入和使用后的清洗,都使得濕電極的使用不便。文中設(shè)計(jì)并實(shí)現(xiàn)了一種不需要涂覆導(dǎo)電膏、可直接佩戴的帶有前置放大電路的爪式干電極傳感器,可用于穿戴式腦電輔助康復(fù)系統(tǒng)。和濕電極相比,這種電極安放簡(jiǎn)便快捷,盡管其接觸阻抗稍高,但通過(guò)主動(dòng)前置放大器的引入,有效地降低了等效接觸阻抗,改善了電極的信噪比,提高了電極抵抗運(yùn)動(dòng)及工頻干擾的能力。經(jīng)過(guò)實(shí)際的腦電信號(hào)采集實(shí)驗(yàn)比對(duì),主動(dòng)干電極表現(xiàn)出良好的記錄特性,與商用標(biāo)準(zhǔn)頭皮濕電極采集的腦電信號(hào)的相關(guān)系數(shù)是0.89;信噪比與商用濕電極接近(在3 d B附近),比沒(méi)有采用主動(dòng)放大電路的干電極高10 d B以上。
[Abstract]:In the traditional EEG system, EEG signals are collected with wet electrodes, which need to be used in conjunction with conductive ointment. The paste is injected one by one before use and cleaned after use. In this paper, a claw type dry electrode sensor with preamplifier circuit is designed and realized, which can be used in wearable EEG assisted rehabilitation system. Compared with wet electrode, this paper designs and implements a kind of claw type dry electrode sensor, which can be worn directly without coated conductive paste, and can be used in wearable EEG assisted rehabilitation system. Although the contact impedance of the electrode is a little high, the equivalent contact impedance is effectively reduced and the SNR of the electrode is improved by the introduction of the active preamplifier. It improves the ability of electrode to resist motion and interference of power frequency. The active dry electrode shows good recording characteristics after comparing with the actual EEG acquisition experiment. The correlation coefficient of EEG with commercial standard scalp wet electrode is 0.89, and SNR is close to that of commercial wet electrode (near 3 dB, which is more than 10 dB higher than that of dry electrode without active amplification circuit).
【作者單位】： 中國(guó)科學(xué)院半導(dǎo)體研究所集成光電子學(xué)國(guó)家重點(diǎn)聯(lián)合實(shí)驗(yàn)室腦科學(xué)與智能技術(shù)卓越創(chuàng)新中心;
【基金】：國(guó)家自然科學(xué)基金(61335010;61275200;61275145) 第十一批“千人計(jì)劃”青年項(xiàng)目資助
【分類(lèi)號(hào)】：TP212
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本文編號(hào)：1652899