北京生物醫(yī)學(xué)工程

利用運(yùn)動(dòng)單位發(fā)放信息建立多通道信息的表面肌電信號(hào)分解

Surface electromyographic signal decomposition based on multi channel information from motor unit firing

作者：魏代祥陳香姚博鄧浩婁智楊基海

單位：中國(guó)科學(xué)技術(shù)大學(xué)電子科學(xué)與技術(shù)系(合肥230027)

分類號(hào)：

出版年·卷·期（頁(yè)碼）：2012·31·5（457-466）

摘要：

目的基于多通道信息的表面肌電(surface electromyographic，sEMG)信號(hào)分解有助于彌補(bǔ)單通道分解時(shí)空間和發(fā)放信息不足的缺點(diǎn)。本文提出利用運(yùn)動(dòng)單位(motor unit，MU)的發(fā)放信息建立多通道sEMG信號(hào)中屬于同一MU的模板映射關(guān)系，實(shí)現(xiàn)多導(dǎo)信號(hào)的信息互補(bǔ)，從而提高分解的準(zhǔn)確率。方法對(duì)四導(dǎo)仿真信號(hào)先分別進(jìn)行單通道分解，然后利用各通道之間的發(fā)放信息建立模板映射關(guān)系進(jìn)行多通道分解。結(jié)果仿真實(shí)驗(yàn)結(jié)果顯示單通道分解準(zhǔn)確率平均為75%，多通道分解準(zhǔn)確率為88%，表明利用MU發(fā)放信息建立模板映射關(guān)系進(jìn)行sEMG信號(hào)分解能夠提高分解有效性。結(jié)論將該方法應(yīng)用于真實(shí)信號(hào)分解，也能有效得到MU的波形和發(fā)放信息。

Objective Surface electromyographic (sEMG) signal decomposition based on multi channel information established from motor unit (MU) firing, had the advantage of overcoming drawbacks of information deficiency in special domain and MU firing when compared to that based on single channel information. This paper proposed to establish mapping relationship between multi channel sEMG signals and the identical MU template, and advance the decomposition accuracies by using the complementation from multi channel signals. Methods Four channel simulated signals were first decomposed separately and then were fused to be decomposed by using template mapping relationship derived from multi channel information. Results The simulated experimental results demonstrated the validation of proposed strategy, with the averaged accuracy 75% of single channel information versus 88% by using multi channel information. Conclusions MU waveform and firing information could be well obtained when the proposed method applied to real multi channel sEMG signal decomposition.

參考文獻(xiàn)：

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