本文選題：腦-機接口(BCI)　切入點：主動干電極　出處：《儀表技術(shù)與傳感器》2017年02期 　論文類型：期刊論文

【摘要】：在傳統(tǒng)的腦電系統(tǒng)中,腦電信號采集使用的是濕電極,需要配合導電膏使用,糊狀的導電膏無論是使用前的逐個注入和使用后的清洗,都使得濕電極的使用不便。文中設(shè)計并實現(xiàn)了一種不需要涂覆導電膏、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系統(tǒng)。和濕電極相比,這種電極安放簡便快捷,盡管其接觸阻抗稍高,但通過主動前置放大器的引入,有效地降低了等效接觸阻抗,改善了電極的信噪比,提高了電極抵抗運動及工頻干擾的能力。經(jīng)過實際的腦電信號采集實驗比對,主動干電極表現(xiàn)出良好的記錄特性,與商用標準頭皮濕電極采集的腦電信號的相關(guān)系數(shù)是0.89;信噪比與商用濕電極接近(在3 d B附近),比沒有采用主動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】： 中國科學院半導體研究所集成光電子學國家重點聯(lián)合實驗室腦科學與智能技術(shù)卓越創(chuàng)新中心;
【基金】：國家自然科學基金(61335010;61275200;61275145) 第十一批“千人計劃”青年項目資助
【分類號】：TP212
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本文編號：1652899