基于Labview的溫度分析系統(tǒng)設(shè)計

電子通信論文編號:TX273  論文字數(shù):16885,頁數(shù):45

目   錄
1 系統(tǒng)設(shè)計背景 1
1.1 虛擬儀器的定義 1
1.2虛擬儀器概況 1
1.3 目前溫度分析系統(tǒng)的現(xiàn)狀 2
1.4 開發(fā)基于LABVIEW溫度分析系統(tǒng)的現(xiàn)實意義 3
1.5 本課題的目標和主要研究內(nèi)容 3
2系統(tǒng)總體方案設(shè)計 5
2.1 課題要求 5
2.2 方案分析與論證 5
2.2.1 測溫模塊方案 5
2.2.2 數(shù)據(jù)采集和傳輸方案 5
2.2.3 LABVIEW讀取串口方案 5
3 數(shù)據(jù)采集系統(tǒng)硬件設(shè)計 7
3.1 溫度采集模塊 7
3.2 單片機模塊 8
3.2.1 主要性能參數(shù) 9
3.2.2 功能特性 9
3.2.3 單片機最小系統(tǒng) 10
3.2.4引腳功能說明 10
3.3 串口通訊電路 14
3.3.1 串口通訊介紹 14
3.3.2 單片機如何與電腦連接 15
3.3.3 電路原理圖 16
4 溫度采集系統(tǒng)軟件設(shè)計 17
4.1 軟件實現(xiàn)方案 17
4.2 軟件流程圖 17
4.2.1主程序流程圖： 18
4.2.2采集程序流程圖： 18
5 LABVIEW分析系統(tǒng)設(shè)計 20
5.1  LABVIEW界面介紹 20
5.2  LABVIEW采集程序設(shè)計 20
5.2.1  VISA介紹 20
5.2.2 VISA配置程序設(shè)計 21
5.2.3 數(shù)據(jù)處理實現(xiàn) 22
5.2.4 數(shù)據(jù)處理程序設(shè)計 22
5.3  LABVIEW子VI的設(shè)計 23
5.3.1 VI的定義 23
5.3.2 如何制作和調(diào)用子VI 23
5.4  系統(tǒng)面板設(shè)計 26
5.5  子面板的調(diào)用 27
5.5.1 串口溫度采集系統(tǒng)界面 27
5.5.2 關(guān)于本軟件界面 28
5.6  安全管理 28
5.7  程序的打包與發(fā)布 30
6 總  結(jié) 33
6.1全文工作總結(jié) 33
6.2 存在的問題及工作展望 33
致    謝 34
參 考 文 獻 35

摘   要
     目前的測溫控制和分析系統(tǒng)大都使用傳統(tǒng)溫度測量儀器．其功能大多都是由硬件或固化的軟件來實現(xiàn)，而且只能通過廠家定義、設(shè)置，其功能和規(guī)格一般都是固定的，用戶無法隨意改變其結(jié)構(gòu)和功能，因此已不能適應(yīng)現(xiàn)代化監(jiān)測系統(tǒng)的要求。隨著計算機技術(shù)的飛速發(fā)展，美國國家儀器公司率先提出了虛擬儀器的概念，徹底打破了傳統(tǒng)儀器由廠家定義、用戶無法改變的模式，使測控儀器發(fā)生了巨大變革。虛擬儀器技術(shù)充分利用計算機的強大運算處理功能，突破傳統(tǒng)儀器在數(shù)據(jù)處理、顯示、傳輸、存儲等方面的限制，通過交互式圖形界面實現(xiàn)系統(tǒng)控制和顯示測量數(shù)據(jù)，并使用框圖模塊指定各種功能。采用集成電路溫度傳感器和虛擬儀器方便地構(gòu)建一個測溫系統(tǒng)，且外圍電路簡單，易于實現(xiàn)，便于系統(tǒng)硬件維護、功能擴展和軟件升級。虛擬儀器具有強大的數(shù)據(jù)處理能力，并且具備多種儀器設(shè)備功能于一體，能夠從分享用計算機所有資源，實現(xiàn)普通儀器所不能實現(xiàn)的功能。而且擁有良好的人機設(shè)計界面，簡單易學(xué)，設(shè)備集成度高，靈活多變。
     單片機溫度采集和分析系統(tǒng)成本低廉，結(jié)構(gòu)簡單，易用性高，通過與LABVIEW軟件結(jié)合，變成了一套完善的具備數(shù)據(jù)采集，數(shù)據(jù)處理和數(shù)據(jù)分析，數(shù)據(jù)存儲電子儀器。具備多功能于一體，小型化，功耗低的特點。這里利用LABVIEW8.6簡體中文版作為語言開發(fā)平臺，設(shè)計系統(tǒng)軟件，并利用計算機串口與下位機串行通訊，實現(xiàn)溫度的實時測量與控制。
關(guān)鍵詞: 虛擬儀器；數(shù)據(jù)采集；數(shù)據(jù)分析；LABVIEW；單片機；串口

 ABSTRACT
     Temperature control and analysis of current systems mostly use the traditional temperature measuring instruments. Most of its functions are cured by the hardware or software to implement, and can only be defined through the factory, set up, its features and specifications are generally fixed, users can not arbitrarily change its structure and function, so can not meet the modern monitoring system requirements. With the rapid development of computer technology, National Instruments pioneered the concept of virtual instrument, completely breaking the traditional instruments defined by the manufacturer, the user can not change the model so that measurement and control equipment has undergone tremendous changes. Full use of the virtual instrument technology computing processing power of computers to break through the traditional instruments in the data processing, display, transmission, storage and other aspects, through an interactive graphical interface to achieve system control and display measurement data, and use a variety of functions specified module block diagram . Using integrated circuit temperature sensor and instrument to easily build a temperature measurement system, and the external circuit is simple and easy to implement, easy system hardware maintenance, extensions, and software upgrades. Virtual instruments are powerful data processing capability, and has a variety of instruments and equipment functions into one, to all the resources from a shared computer, to achieve functionality not possible with ordinary instruments. And with good man-machine interface design, easy to learn, high integration and flexibility.
     MCU temperature acquisition and analysis system cost, simple structure, ease of use high, combined with LABVIEW software into a complete set of available data acquisition, data processing and data analysis, data storage, electronic equipment. With in-one, small, low power consumption. Here the use LABVIEW8.6 Simplified Chinese as the language development platform, system software design and computer serial port and of Serial communication, to achieve real-time temperature measurement and control
 Key words :  virtual instrument； data acquisition； data analysis； LABVIEW； serial port； single chip