本文選題：體表生物電 + 放大器　； 參考：《天津大學》2012年碩士論文

【摘要】：體表生物電是生命活動過程中生物體表產生的各種電位變化,包括腦電、肌電和心電等,含有重要的人體生理活動和疾病信息,既可用于生命科學研究與醫(yī)學臨床診治,還可為人機接口等智能機械提供操控信號。目前多數(shù)體表生物電檢測為有線方式。但在一些特殊場合(如快速運動狀態(tài)下生理參數(shù)檢測、宇航員飛行訓練中健康指標監(jiān)測)的體表生物電采集與傳輸必須擺脫電線束縛,改用無線發(fā)送與收取方式。與有線相比,無線采集系統(tǒng)具有靈活方便和有效減少工頻干擾的優(yōu)點。 本文設計并實現(xiàn)了一套體表生物電無線采集系統(tǒng)。系統(tǒng)由生物電信號拾取與放大濾波、無線傳輸和數(shù)據(jù)顯示與儲存三個單元組成。放大濾波單元運用了高、低通濾波和50Hz陷波手段;無線傳輸采用MSP430f149單片機和nRF24L01無線模塊;用LabVIEW軟件實現(xiàn)信號的顯示和存儲。 為驗證所設計系統(tǒng)的工作性能,在穩(wěn)態(tài)視覺誘發(fā)電位(Steady State Visual Evoked Potential,SSVEP)實驗中,對照分析了本系統(tǒng)與北京中科新拓公司的生物電放大器同時采集頭皮同一部位的SSVEP信號。結果表明:兩組數(shù)據(jù)頻譜曲線起伏一致,相關系數(shù)為0.8352;兩組信號在δ、θ、α和β各個波段能量分布比重基本相同。此外,利用本系統(tǒng)采集所得心電信號均能正常顯示其中含有的P、QRS和T波特征;利用本系統(tǒng)采集所得肌肉從靜止到收縮時的肌電信號,也能反映其極低頻至90Hz高頻的變化特征。 本文設計的體表生物電無線采集系統(tǒng)可以為特殊場合生理參數(shù)無線檢測或人機接口無線操控裝置的研發(fā)及應用提供基本技術參考。
[Abstract]:Body surface bioelectricity is a variety of potential changes produced by the biological meter during life activities, including electroencephalogram, electromyography and electrocardiogram, which contains important human physiological activities and disease information. It can be used in life science research and medical clinical diagnosis and treatment, and can also provide control signals for intelligent machines, such as man-machine interface. Most of the body surface bioelectricity inspection is currently available. But in some special occasions, such as physical parameters detection in fast motion state and health index monitoring in astronaut's flight training, the collection and transmission of body surface bioelectricity must get rid of wire binding and switch to wireless transmission and collection. Compared with wired, the wireless acquisition system is flexible, convenient and effective to reduce the power frequency. The advantages of disturbing.
This paper designs and implements a set of body surface bioelectricity wireless acquisition system, which consists of three units: biologic signal pickup and amplification filter, wireless transmission and data display and storage. The amplifying filter unit uses high, low pass filtering and 50Hz trap means; wireless transmission uses MSP430f149 MCU and nRF24L01 wireless module; LabVIEW The software realizes the display and storage of the signal.
In order to verify the performance of the designed system, in the Steady State Visual Evoked Potential (SSVEP) experiment, the system and the bioelectric amplifier of Beijing Zhongke Xin Tuo company are used to collect the SSVEP signals of the same part of the scalp simultaneously. The results show that the two sets of data spectrum curves are in the same fluctuation, and the correlation system is related. The number of the signals in the two groups is basically the same in the Delta, theta, alpha and beta bands of the energy distribution. In addition, the ECG signals collected by this system can display the characteristics of P, QRS and T waves, and the muscle electrical signals of the muscle from rest to contraction can also reflect the changes in the high frequency to the high frequency of 90Hz from the system. Features.
The body surface bioelectricity wireless acquisition system designed in this paper can provide basic technical reference for the wireless detection of physiological parameters in special occasions or the development and application of man-machine interface wireless manipulating device.

【學位授予單位】：天津大學
【學位級別】：碩士
【學位授予年份】：2012
【分類號】：R318.0

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