【摘要】：心臟類疾病成為危害人體健康的主要疾病之一,它的診治是醫(yī)學(xué)領(lǐng)域的一個(gè)難題。心電圖(Electrocardiograph)能夠反映出心肌細(xì)胞生物電的變化,成為診斷心臟類病變最有力的依據(jù)。心電圖機(jī)作為診斷心臟性疾病的重要工具,當(dāng)前市場(chǎng)上已經(jīng)有很多相關(guān)的設(shè)備,動(dòng)態(tài)便攜式心電Hoher價(jià)格較昂貴難以普及。針對(duì)心臟類疾病的突發(fā)性,研制一款功耗低、小型化、便攜式心電監(jiān)護(hù)產(chǎn)品迫在眉捷。本文設(shè)計(jì)了基于LM4F120H5QR的三導(dǎo)聯(lián)便攜式心電監(jiān)護(hù)系統(tǒng)。闡述了心電信號(hào)基礎(chǔ)理論,概述了心電信號(hào)采集和處理的方法。運(yùn)用了RT-Thread實(shí)時(shí)操作系統(tǒng)、GPRS無線通信技術(shù)、基于MFC的軟件設(shè)計(jì)技術(shù)以及FAT32文件系統(tǒng),選用LM4F120H5QR處理器作為控制單元,采用ADI公司生產(chǎn)的24位AD芯片設(shè)計(jì)了心電采集單元,設(shè)計(jì)了基于LM4F120H5QR的心電信號(hào)處理系統(tǒng)和基于GPRS的遠(yuǎn)程心電監(jiān)護(hù)系統(tǒng)。下位機(jī)由導(dǎo)聯(lián)接口、除顫保護(hù)、模數(shù)轉(zhuǎn)換、主控單元、SD卡存儲(chǔ)、按鍵及顯示、電源電路組成。本系統(tǒng)采用數(shù)字信號(hào)處理的方法進(jìn)行濾波,通過軟件實(shí)現(xiàn)FIR低通濾波、零相移的IIR高通濾波和工頻陷波。與傳統(tǒng)采用硬件方法設(shè)計(jì)心電信號(hào)處理電路,相比較而言節(jié)省了成本并且很大程度上減小了電路板的體積和降低了功耗;基于LM4F120H5QR的ECG處理系統(tǒng)包含模數(shù)轉(zhuǎn)換、數(shù)據(jù)處理及存儲(chǔ)、LCD顯示及無線通信,主要實(shí)現(xiàn)對(duì)心電信號(hào)的模數(shù)轉(zhuǎn)換、濾波處理、存儲(chǔ)、顯示和傳輸;基于GPRS的遠(yuǎn)程心電監(jiān)護(hù)系統(tǒng)主要采用MFC軟件編程方法通過UDP協(xié)議設(shè)計(jì)了PC端的心電監(jiān)護(hù)界面,醫(yī)生可遠(yuǎn)程監(jiān)視患者的心電情況。此外,本系統(tǒng)還實(shí)現(xiàn)了在RT-Thread實(shí)時(shí)操作系統(tǒng)在LM4F120H5QR平臺(tái)上的移植,以便更好的開發(fā)和實(shí)現(xiàn)嵌入式系統(tǒng)的各種功能。本系統(tǒng)經(jīng)過仿真與樣機(jī)的綜合實(shí)驗(yàn),結(jié)果表明基于LM4F120H5QR的三導(dǎo)聯(lián)便攜式心電圖儀系統(tǒng)成功的實(shí)現(xiàn)對(duì)心電信號(hào)采集、存儲(chǔ)、顯示和遠(yuǎn)程傳輸,具備簡單的分析處理能力。該系統(tǒng)具有低成本、小體積、低功耗、便攜式、遠(yuǎn)程傳輸?shù)葍?yōu)點(diǎn)完全符合家庭心電監(jiān)護(hù)產(chǎn)品的需求。
[Abstract]:Heart disease is one of the major diseases that endanger human health, and its diagnosis and treatment is a difficult problem in medical field. Electrocardiograph (ECG) can reflect the changes of cardiomyocyte bioelectricity and become the most powerful basis for the diagnosis of cardiac diseases. As an important tool for the diagnosis of cardiac diseases, electrocardiograph (ECG) has many related devices in the market. Dynamic portable ECG Hoher is expensive and difficult to be popularized. For the sudden onset of heart disease, a low power consumption, miniaturization, portable ECG monitoring product is urgent. A three-lead portable ECG monitoring system based on LM 4 F 120 H 5QR is designed in this paper. The basic theory of ECG signal is introduced, and the method of ECG signal acquisition and processing is summarized. GPRS wireless communication technology is used in RT-Thread real-time operating system. Based on MFC software design technology and FAT32 file system, LM4F120H 5QR processor is selected as control unit, and 24 bits AD chip produced by ADI is used to design ECG acquisition unit. A ECG signal processing system based on LM4F120H5QR and a remote ECG monitoring system based on GPRS are designed. The lower computer consists of lead interface, defibrillation protection, A / D conversion, main control unit SD card storage, key and display, power circuit. In this system, digital signal processing is used to filter, Fir low-pass filter, zero-phase-shift IIR high-pass filter and power frequency notch are realized by software. Compared with the traditional hardware method, the design of ECG signal processing circuit saves the cost and greatly reduces the volume and power consumption of the circuit board, and the ECG processing system based on LM4F120H5QR includes A / D conversion. Data processing and storage LCD display and wireless communication, the main realization of ECG A / D conversion, filter processing, storage, display and transmission; The remote ECG monitoring system based on GPRS mainly uses MFC software programming method to design the ECG monitoring interface of PC side through UDP protocol. Doctors can remotely monitor the ECG condition of patients. In addition, the transplant of RT-Thread real-time operating system on LM4F120H5QR platform is realized in order to develop and realize various functions of embedded system. The simulation and prototype experiments show that the three-lead portable electrocardiograph system based on LM4F120H5QR has successfully realized the acquisition, storage, display and remote transmission of ECG signals, and has the ability of simple analysis and processing. The system has the advantages of low cost, small volume, low power consumption, portable, remote transmission and so on.
【學(xué)位授予單位】：西北師范大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TH776

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