【正文】 ................................. 33 參考文獻(xiàn) ................................................................................................. 34 致 謝 .........................................................................錯(cuò)誤 !未定義書簽。 系統(tǒng)信號(hào)處理模塊的設(shè)計(jì) ......................................... 30 167。 系統(tǒng)登錄模塊設(shè)計(jì) ..................................................... 27 167。 系統(tǒng) 軟件程序結(jié)構(gòu) ............................................................... 24 167。 踏車控制電路的設(shè)計(jì) ........................................................... 23 第四章 系統(tǒng)軟件部分的設(shè)計(jì) ............................................................. 24 167。 單片機(jī)采集電路的設(shè)計(jì) ............................................. 20 167。 35 Hz 陷波電路設(shè)計(jì) ................................................... 19 167。 陷波電路設(shè)計(jì) ........................................................................ 18 167。 二階有源高通、低通濾波器的參數(shù)設(shè)置 ................ 17 V 167。 二階低通有源濾波器的工作原理 ............................ 14 167。 心電放大電路設(shè)計(jì) ............................................................... 13 167。 心律失常 .......................................................................11 第三章 系統(tǒng)硬件電路的設(shè)計(jì) ............................................................. 12 167。 Q–T 間期變化 .............................................................. 10 167。 ST 段變化 ..................................................................... 10 167。 U 波 ............................................................................... 10 167。 T 波 ................................................................................. 9 167。 QRS 綜合 波群 ............................................................... 9 167。 P 波 .................................................................................. 9 167。 總體方案 .................................................................................. 5 第二章 心電信號(hào)基礎(chǔ)知識(shí) .................................................................... 6 167。 研究背景及國(guó)內(nèi)外研究現(xiàn)狀 ................................................. 3 167。該系統(tǒng)利用 LabView 圖形化語(yǔ)言編程，將心電電極采集的信號(hào)進(jìn)行顯示、分析、存儲(chǔ)、打印，使其能夠 進(jìn)行心電信號(hào)的采集、數(shù)據(jù)保存、數(shù)據(jù)處理，可較好地輔助醫(yī)生更好地進(jìn)行診斷。這使得基于虛擬儀器的生物醫(yī)學(xué)儀器，如心功能檢測(cè)和分析系統(tǒng)的綜合設(shè)計(jì)逐漸成為可能。因而，如何及時(shí)準(zhǔn)確地輔助醫(yī)生檢測(cè)和診斷出心血管疾病并予以有效的治療，是非常重要且有意義的?，F(xiàn)在較為有效的檢測(cè)方法就是采用記錄 24 小時(shí)以至更長(zhǎng)時(shí)間的心電圖并加以分析以期捕捉到心律失常波形。 I 基于虛擬儀器的心臟功能檢測(cè)系統(tǒng)的設(shè)計(jì) 摘 要 隨著人們生活節(jié)奏的加快，不合理的飲食和作息習(xí)慣使得心血管類疾病的發(fā)生率逐年增高。它們嚴(yán)重威脅著人類的健康，是導(dǎo)致疾病患者死亡的主要疾病之一，許多患者心臟病發(fā)作后由于未能及時(shí)發(fā)現(xiàn)和搶救極易發(fā)生死亡。但是此種監(jiān)測(cè)較為費(fèi)時(shí)費(fèi)錢，不利于心血管疾病患者的快速檢測(cè)診斷，醫(yī)生使用起來(lái)也較為復(fù)雜、繁瑣，并且還會(huì)加大醫(yī)院的設(shè)備投資和患者的就醫(yī)費(fèi)用。 虛擬儀器技術(shù) (LabView)是現(xiàn)代測(cè)量技術(shù)和計(jì)算機(jī)技術(shù)結(jié)合的產(chǎn)物，并用數(shù)字化和軟件技術(shù)提高測(cè)試的靈活性和可擴(kuò)充性。本課題主要包含了硬件和軟件等功能模塊的設(shè)計(jì)，通過(guò)軟件開(kāi)發(fā)平臺(tái) (LabView)，設(shè)計(jì)了一種基于虛擬儀器的由計(jì)算機(jī)控制的、簡(jiǎn)便、開(kāi)放、靈活、實(shí)用的心功能檢測(cè)系統(tǒng)。 關(guān)鍵詞 ： 心功能檢測(cè)，心電圖，虛擬儀器， LabView，功能模塊 II DESIGN OF CARDIAC FUNCTION DETECTION SYSTEM BASED ON VIRTUAL INSTRUMENT ABSTRACT With the quickening pace of modern society, the incidence of cardiovascular diseases is increasing year by year because of people’s immoderate habits of diet and workrest. They are not only the serious threats to human health, but also one major reason causing death, and many patients may get into a danger of death after heart attack as the result of failure to rescue and discover it in time. In order to capture the arrhythmia waveform, a more effective approach, which is based on the record of electrocardiogram for 24 hours or longer, is usually accepted to analyze ECG. But such kind of monitoring is more expensive and time consuming. They are not conducive to the patients with cardiovascular disease for the rapid detection and diagnosis but also make the doctors’ operation more plex and cumbersome. At the same time, they will increase investment of the hospital in equipment and the medical treatment cost of patients. Thus, it will be a very important and meaningful issue how to assist the doctors to detect and diagnose the cardiovascular disease. Virtual Instrument Technology (LABVIEW) is the product bining with the modern measurement techniques and puter technology, and can be used to enhance the flexibility and extendibility of testing through digital and software technology. This gradually makes it possible to design biomedical equipments based on virtual instrument, such as the integrated design of cardiac function detection and analysis system. This system mainly dealt with the designs of hardware, software and other function modules. In this paper, the cardiac function testing system, which is a putercontrolled, simple, open, flexible and practical detection system based on the virtual instrument, was designed with the help of software development platform (LABVIEW). With the advantage of III graphical language of LABVIEW, ECG signals acquired by the electrodes are displayed, analyzed, saved or printed by the programming software. This made the system suitable for ECG signal acquisition, datasaving and some signal processing algorithms. And the system could be used to assist doctors’ diagnosis better. KEY WORDS： cardiac function testing, ECG, Virtual Instrument, LABVIEW, function modules IV 目 錄 摘 要 ........................................................................................................ I ABSTRACT ............................................................................................ II 前 言 ......................................................................................................... 1 第一章 緒 論 .......................................................................................... 3 167。 研究目的及意義 ...................................................................... 4 167。 心電圖的產(chǎn)生及其特點(diǎn) ......................................................... 6 167。 PR 間期 .......................................................................... 9 167。 ST 段 ............................................................................... 9 167。 QT 間期 ........................................................................ 10 167。 心電圖的臨床診斷意義 .....................