發(fā)布時(shí)間：2018-07-25 13:19

【摘要】：表面肌電信號(Surface Electromyography, SEMG)是神經(jīng)肌肉系統(tǒng)的生物電變化在皮膚表面加以引導(dǎo),放大記錄和顯示得到的一維時(shí)間序列信號。SEMG信號能夠反映神經(jīng)系統(tǒng)控制和肌肉運(yùn)動之間的關(guān)系,而且具有檢測無創(chuàng)性的優(yōu)點(diǎn),因此其在疾病診斷、運(yùn)動醫(yī)學(xué)、假肢控制等醫(yī)療康復(fù)領(lǐng)域以及遙控機(jī)器人、虛擬現(xiàn)實(shí)、手勢識別等人機(jī)交互領(lǐng)域都具有廣泛的應(yīng)用。 本文在研究了國內(nèi)外表面肌電信號采集系統(tǒng)以及傳感網(wǎng)絡(luò)無線通信技術(shù)的基礎(chǔ)上,結(jié)合項(xiàng)目實(shí)際需求,圍繞多通道信號的采集與傳輸工作,設(shè)計(jì)了一套以WIFI高速無線傳輸技術(shù)為基礎(chǔ)的陣列式表面肌電信號采集與傳輸系統(tǒng)。為保證系統(tǒng)數(shù)據(jù)采集的一致性與同步性,克服系統(tǒng)大量數(shù)據(jù)的傳輸難點(diǎn)問題,本文提出了一種由數(shù)據(jù)采集節(jié)點(diǎn),數(shù)據(jù)匯聚中心以及上位機(jī)客戶端組成的,將有線無線網(wǎng)絡(luò)相結(jié)合的數(shù)據(jù)采集傳輸網(wǎng)絡(luò)(CSN-WIFI),同時(shí)針對網(wǎng)絡(luò)特點(diǎn)設(shè)計(jì)了嚴(yán)格同步、實(shí)時(shí)快速的數(shù)據(jù)傳輸協(xié)議,其中包括時(shí)間同步機(jī)制,管道數(shù)據(jù)聚合技術(shù)等,并詳細(xì)介紹了不同采集節(jié)點(diǎn)之間的同步方法,分析了數(shù)據(jù)聚合周期對傳輸網(wǎng)絡(luò)吞吐量,時(shí)延,丟包率以及系統(tǒng)能耗等方面的影響。實(shí)驗(yàn)研究結(jié)果表明,整個(gè)系統(tǒng)能夠同時(shí)對128通道的人體前臂表面肌電信號進(jìn)行采集,并實(shí)現(xiàn)了信號數(shù)據(jù)基于TCP/IP協(xié)議的無線實(shí)時(shí)傳輸,整個(gè)傳輸網(wǎng)絡(luò)的吞吐率達(dá)到2Mbps,時(shí)延小于0.1s,丟包率小于1%,為基于表面肌電信號的新一代人機(jī)交互方式的研究打下基礎(chǔ)。
[Abstract]:Surface EMG signal (Surface Electromyography, SEMG) is the bioelectric change of neuromuscular system which is guided by the skin surface. The one dimensional time series signal. SEMG signal can reflect the relationship between nervous system control and muscle movement. And it has the advantages of non-invasive detection, so it has a wide range of applications in the field of medical rehabilitation, such as disease diagnosis, sports medicine, prosthetic control, remote control robot, virtual reality, gesture recognition and other human-computer interaction fields. Based on the research of surface EMG signal acquisition system and wireless communication technology of sensor network at home and abroad, this paper focuses on the acquisition and transmission of multi-channel signals according to the actual requirements of the project. An array surface electromyography (EMG) acquisition and transmission system based on WIFI high speed wireless transmission technology is designed. In order to ensure the consistency and synchronicity of the system data collection, and overcome the difficult problem of the system's massive data transmission, this paper proposes a kind of data acquisition node, data gathering center and the upper computer client, which is composed of the data collection node, the data gathering center and the upper computer client. The data acquisition and transmission network (CSN-WIFI), which combines the wired wireless network, and designs the strict synchronization, real-time and fast data transmission protocol according to the characteristics of the network, including time synchronization mechanism, pipeline data aggregation technology and so on. The synchronization methods between different collection nodes are introduced in detail. The effects of data aggregation cycle on the throughput, delay, packet loss rate and system energy consumption of the transmission network are analyzed. The experimental results show that the whole system can simultaneously collect 128-channel EMG signals on the forearm surface of human body, and realize the wireless real-time transmission of signal data based on TCP/IP protocol. The throughput of the whole transmission network is 2 Mbpss, the delay is less than 0.1 s, and the packet loss rate is less than 1, which lays the foundation for the research of a new generation of man-machine interaction based on surface EMG signal.
【學(xué)位授予單位】：浙江大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TP274.2;TN92

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