本文選題：膈肌肌電 + 信號(hào)采集��； 參考：《華南理工大學(xué)》2015年碩士論文

【摘要】：表面肌電是神經(jīng)系統(tǒng)電活動(dòng)在皮膚表面處的綜合疊加表現(xiàn),蘊(yùn)含著肌肉、神經(jīng)的功能狀態(tài)信息。隨著現(xiàn)代科學(xué)技術(shù)的迅速發(fā)展,人們對(duì)肌電信號(hào)有了更深入、更準(zhǔn)確的認(rèn)識(shí),肌電信號(hào)被廣泛應(yīng)用于基礎(chǔ)醫(yī)學(xué)研究、康復(fù)工程、臨床診斷等眾多領(lǐng)域。膈肌是人體最主要的呼吸肌,其肌電信號(hào)在一定程度上能反映呼吸系統(tǒng)的功能狀態(tài),在臨床醫(yī)學(xué)領(lǐng)域上的呼吸疾病診斷、呼吸功能監(jiān)控與評(píng)價(jià)等發(fā)揮著重要的作用。本論文將根據(jù)肌電信號(hào)的特點(diǎn),設(shè)計(jì)一個(gè)基于表面電極的膈肌肌電采集系統(tǒng)。由于肌電信號(hào)本身是一種微弱的電信號(hào),在采集時(shí)極易受到其他干擾信號(hào)的影響,因此設(shè)計(jì)一個(gè)高抗干擾能力的電路是本次設(shè)計(jì)最先考慮的問(wèn)題。本文采用LF347運(yùn)算放大器構(gòu)成前置差分放大電路與右腿驅(qū)動(dòng)電路,有效地抑制共模干擾。同時(shí)設(shè)計(jì)了高通濾波器、低通濾波器和50Hz的工頻陷波器,濾除信號(hào)中的高、低頻噪聲和工頻噪聲。對(duì)采集電路輸出的信號(hào)進(jìn)行A/D轉(zhuǎn)換,運(yùn)用數(shù)學(xué)形態(tài)法對(duì)信號(hào)進(jìn)行濾波處理,濾除心電干擾。最后在時(shí)域和頻域上分別計(jì)算出膈肌的肌電強(qiáng)度與中值頻率,將處理的結(jié)果應(yīng)用到實(shí)際臨床中,包括呼吸機(jī)風(fēng)機(jī)的觸發(fā)控制與膈肌的疲勞診斷。
[Abstract]:Surface electromyography (EMG) is a comprehensive superposition of nervous system electrical activity on the skin surface, which contains the functional state information of muscle and nerve. With the rapid development of modern science and technology, people have a deeper and more accurate understanding of EMG signals. EMG signals are widely used in basic medicine research, rehabilitation engineering, clinical diagnosis and many other fields. Diaphragm is the most important respiratory muscle in human body. Its electromyography can reflect the functional state of respiratory system to a certain extent. It plays an important role in the diagnosis of respiratory diseases and the monitoring and evaluation of respiratory function in the field of clinical medicine. In this paper, a diaphragm electromyography acquisition system based on surface electrode is designed according to the characteristics of EMG signal. Because EMG is a kind of weak electrical signal, it is easy to be affected by other interference signals when it is collected. Therefore, designing a circuit with high anti-interference ability is the first problem to be considered in this design. In this paper, LF347 operational amplifier is used to construct predifferential amplifier and right leg drive circuit, which can effectively suppress common-mode interference. At the same time, high pass filter, low pass filter and 50 Hz power frequency notch filter are designed to filter the high, low frequency and power frequency noise in the signal. The output signal of the acquisition circuit is converted by A / D, and the signal is filtered and processed by mathematical morphological method to filter out the ECG interference. Finally, the myoelectric intensity and median frequency of diaphragm were calculated in time domain and frequency domain respectively, and the results were applied to clinical practice, including trigger control of ventilator fan and fatigue diagnosis of diaphragm.
【學(xué)位授予單位】：華南理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類(lèi)號(hào)】：R741.044;TN911.7

【參考文獻(xiàn)】

相關(guān)期刊論文 前5條

1 周海峰 ,趙春宇 ,陳大躍;一種神經(jīng)信號(hào)調(diào)理電路的設(shè)計(jì)[J];電子技術(shù)應(yīng)用;2005年02期

2 何慶華,吳寶明,彭承琳;表面肌電信號(hào)的分析與應(yīng)用[J];國(guó)外醫(yī)學(xué).生物醫(yī)學(xué)工程分冊(cè);2000年05期

3 王國(guó)祥;不同負(fù)荷強(qiáng)度運(yùn)動(dòng)時(shí)表面肌電圖中位頻率與血乳酸濃度變化的關(guān)系[J];體育學(xué)刊;2004年01期

4 王越 ,李剛 ,王立麗;幾種新型的高性能生物電放大器[J];電子設(shè)計(jì)應(yīng)用;2005年06期

5 楊丹,王健;等速運(yùn)動(dòng)負(fù)荷誘發(fā)肱二頭肌疲勞過(guò)程中sEMG信號(hào)變化[J];中國(guó)體育科技;2002年04期

相關(guān)碩士學(xué)位論文 前1條

1 郝秀春;肌電假手控制系統(tǒng)的研究[D];大連理工大學(xué);2002年

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本文編號(hào)：2093431