基于Labview的溫度分析系統設計

論文編號:TX273  論文字數:16885,頁數:45

摘   要
     目前的測溫控制和分析系統大都使用傳統溫度測量儀器．其功能大多都是由硬件或固化的軟件來實現，而且只能通過廠家定義、設置，其功能和規格一般都是固定的，用戶無法隨意改變其結構和功能，因此已不能適應現代化監測系統的要求。隨著計算機技術的飛速發展，美國國家儀器公司率先提出了虛擬儀器的概念，徹底打破了傳統儀器由廠家定義、用戶無法改變的模式，使測控儀器發生了巨大變革。虛擬儀器技術充分利用計算機的強大運算處理功能，突破傳統儀器在數據處理、顯示、傳輸、存儲等方面的限制，通過交互式圖形界面實現系統控制和顯示測量數據，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建一個測溫系統，且外圍電路簡單，易于實現，便于系統硬件維護、功能擴展和軟件升級。虛擬儀器具有強大的數據處理能力，并且具備多種儀器設備功能于一體，能夠從分享用計算機所有資源，實現普通儀器所不能實現的功能。而且擁有良好的人機設計界面，簡單易學，設備集成度高，靈活多變。
     單片機溫度采集和分析系統成本低廉，結構簡單，易用性高，通過與LABVIEW軟件結合，變成了一套完善的具備數據采集，數據處理和數據分析，數據存儲電子儀器。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平臺，設計系統軟件，并利用計算機串口與下位機串行通訊，實現溫度的實時測量與控制。
關鍵詞: 虛擬儀器；數據采集；數據分析；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

目   錄
1 系統設計背景 1
1.1 虛擬儀器的定義 1
1.2虛擬儀器概況 1
1.3 目前溫度分析系統的現狀 2
1.4 開發基于LABVIEW溫度分析系統的現實意義 3
1.5 本課題的目標和主要研究內容 3
2系統總體方案設計 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 數據采集和傳輸方案 5
2.2.3 LABVIEW讀取串口方案 5
3 數據采集系統硬件設計 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 9
3.2.2 功能特性 9
3.2.3 單片機最小系統 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 溫度采集系統軟件設計 17
4.1 軟件實現方案 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分析系統設計 20
5.1  LABVIEW界面介紹 20
5.2  LABVIEW采集程序設計 20
5.2.1  VISA介紹 20
5.2.2 VISA配置程序設計 21
5.2.3 數據處理實現 22
5.2.4 數據處理程序設計 22
5.3  LABVIEW子VI的設計 23
5.3.1 VI的定義 23
5.3.2 如何制作和調用子VI 23
5.4  系統面板設計 26
5.5  子面板的調用 27
5.5.1 串口溫度采集系統界面 27
5.5.2 關于本軟件界面 28
5.6  安全管理 28
5.7  程序的打包與發布 30
6 總  結 33
6.1全文工作總結 33
6.2 存在的問題及工作展望 33
致    謝 34
參 考 文 獻 35