现代电子技术
現代電子技術
현대전자기술
MODERN ELECTRONICS TECHNIQUE
2015年
4期
30-34
,共5页
SEMG%工频干扰%EEMD%自适应滤波%LMS
SEMG%工頻榦擾%EEMD%自適應濾波%LMS
SEMG%공빈간우%EEMD%자괄응려파%LMS
SEMG%power-line interference%EEMD%adaptive filtering%LMS
为了在滤除表面肌电信号检测中的工频干扰，在硬件检测电路中采用屏蔽检测单元、隔离检测设备、设备良好接地等方法；数字滤波部分结合实际，使用集合经验模式算法，由集合经验模式算法分解出的本征模态函数构成自适应滤波器。最后经过使用最小均方误差算法以及配合集合经验模式算法提高自适应滤波器的运算效率。为评定该自适应滤波器性能，实验基于Matlab及硬件采集设备进行了手前臂表面肌电信号检测和滤波，结果表明所设计的方法对不同相位、不同频率的工频干扰都有良好的抑制消除作用。
為瞭在濾除錶麵肌電信號檢測中的工頻榦擾，在硬件檢測電路中採用屏蔽檢測單元、隔離檢測設備、設備良好接地等方法；數字濾波部分結閤實際，使用集閤經驗模式算法，由集閤經驗模式算法分解齣的本徵模態函數構成自適應濾波器。最後經過使用最小均方誤差算法以及配閤集閤經驗模式算法提高自適應濾波器的運算效率。為評定該自適應濾波器性能，實驗基于Matlab及硬件採集設備進行瞭手前臂錶麵肌電信號檢測和濾波，結果錶明所設計的方法對不同相位、不同頻率的工頻榦擾都有良好的抑製消除作用。
위료재려제표면기전신호검측중적공빈간우，재경건검측전로중채용병폐검측단원、격리검측설비、설비량호접지등방법；수자려파부분결합실제，사용집합경험모식산법，유집합경험모식산법분해출적본정모태함수구성자괄응려파기。최후경과사용최소균방오차산법이급배합집합경험모식산법제고자괄응려파기적운산효솔。위평정해자괄응려파기성능，실험기우Matlab급경건채집설비진행료수전비표면기전신호검측화려파，결과표명소설계적방법대불동상위、불동빈솔적공빈간우도유량호적억제소제작용。
To eliminate the power?line interference from surface?electromyography signals,some methods were adopted, such as shielding,isolation and grounding of measurement instruments. Ensemble empirical mode decomposition(EEMD)algo?rithm were adopted in digital filtering to get intrinsic mode function(IMF)and then constitute an adaptive filter. The operation efficiency of the adaptive filter were improved by least mean square(LMS)algorithm and EEMD algorithm. To evaluate the fil?ter,a detecting and fieltering experiment of arm surface?electromyography signals were performed on the basis of Matlab and re?lated hardware acquisition devices. The results show that the proposed method has a good performance to restrain and remove the power?line interference from different phases and frequencies .
