本研究創新研發一種電位方式，將電極放置在前額擷取EEG訊號，並且加入梳狀濾波 器在相位編碼中，處理訊號裡的雜訊。此方法是在前額葉(Fpz)上放置電極以擷取視覺誘 發電位(VEP)信號，取代傳統測量方式中使用的枕葉(Oz)區擷取視覺誘發電位。我們將廣 泛的應用在視覺誘發電位的方法，包括穩態視覺誘發電位(SSVEP)、閃光視覺誘發電位 (FVEP)和相位編碼(Phase)來研究，並且比較枕葉(Oz)和前額葉(Fpz)位置的腦波信號。 在傳統擷取腦波枕葉(Oz)位置的方式，實際操作中會受到人的頭髮干擾，且還需額外的 電極來擷取眼動訊號(EOG)並且過濾它。我們提出的方法可以有效地獲得視覺誘發電位和 眼動訊號，並且不需要像在枕葉(Oz)位置需要除去大量頭髮的前置作業準備，我們還可 以減少擷腦波訊號的電極數量。在前額電極擷取腦波訊號可能是設計腦人機介面的一個 重大突破。;This research represents a new electrode positioning on the frontal lobe to collect EEG signals. Through this we also incorporated comb filter to filter signal noise upon signal collection. The novel method examine visually evoked potential (VEP) by placing an electrode on the frontal lobe (Fpz), on the other hand, the traditional method involves placing the electrode at the mid-occipital location (Oz). We used three different widely used VEP methods, namely steady-state VEP (SSVEP), flash VEP (FVEP) and Phase and analyze the brain wave signals from both the Oz and Fpz location. Traditional Oz location of signal processing involves an extra electrode as well as hair interference. Our frontal novel electrode placement not only trigger the VEP signal, it also process the EOG signal at the same time without preparation of hair and addition electrodes. The frontal lobe of positioning electrode to analyze the VEP signal is a remarkable breakthrough in the BCI system application.
