【摘要】 50Hz工频干扰是表面肌电信号(SEMG)的主要干扰源之一,消除工频干扰是表面肌电信号处理中的一项重要技术。鉴于原有模拟信号调理电路在工频消噪这一环节上的不足,设计了一种50Hz数字陷波器用以消噪,减小干扰。实验证明,采用基于窗函数法的FIR原理设计的50Hz数字陷波器能有效滤除SEMG中的工频干扰并基本不影响50Hz周围有效SEMG的获取。更多还原

【Abstract】 The power line interference is one of the main interference sources in surface electromyography(SEMG),the reduction of which is a significant technology in the processing of SEMG.Considering the deficiency of original analog signal conditioning circuit,a kind of digital trap filter of 50 Hz is designed for signal de-noising.Experiments show that the digital trap filter based on window function method of FIR can efficiently reduce the power line interference in SEMG.Furthermore,the frequency around 50 Hz does not be obviously influenced.更多还原