為了減少傳統Ag-Agcl檢測電極在提取有效SEMG信號中可能遇到的干擾與噪聲，設計了一種新型Ag-Agcl檢測電極。與傳統Ag-Agcl檢測電極相比較，該系統是由電極、前置放大電路、濾波電路和陷波電路進行密封并加以屏蔽層保護后所組成的有源SEMG檢測電極。該檢測電極極大地縮短了電極連線，可以用來提取有效的SEMG信號。試驗結果表明，采用該SEMG檢測電極可以進一步提高信噪比，減少噪聲，提取到有效的表面肌電信號。

Abstract:

?In order to reduce the noise and interference that the traditional Ag - Agcl surface electrode may meet in extracting the effective SEMG signal, this paper reseached and designed a new type of Ag-Agcl detection electrode. Comparing with the traditional Ag-Agcl detection electrode ,this system was the active detection electrode which was cornposed of the electrode, the preamplifier circuit, the filter circuits and the trap circuit together and protected by the shielding loyer. The detection electrode greatly shortened the electrode connection and could be used to extract the effective SEMG signal.The Experimental result shows that the SEMG detection electrode can further improve SNR, reduce the noise and get effective surface electromyographic signal.