【正文】 沈陽理工大學(xué) 應(yīng)用技術(shù)學(xué)院 畢業(yè)設(shè)計（論文） 題 目： 基于 LabVIEW 的溫度檢測系統(tǒng) 系 別： 信息 與控制學(xué)院 專 業(yè)： 測控技術(shù)與儀器 學(xué)生姓名： 指導(dǎo)教師： 年 月 日 I 摘 要 隨著測控技術(shù)的不斷發(fā)展，測控技術(shù)正向著自動化，智能化，數(shù)字化和網(wǎng)絡(luò)化的方向發(fā)展。美國 NI 公司的提出了 “ 軟件就是儀器 ” 的概念，于是 LabVIEW 應(yīng)運而生。 檢測在當(dāng)今社會的許多工業(yè)中不和或缺，有些環(huán)境惡劣的地方更是離不開遠程的檢測系統(tǒng)。 本設(shè)計就解決了有些重工業(yè)、制藥業(yè)等行業(yè)中的有些場所間內(nèi)不適合人進入時，還需要進行溫度檢測的問題。本設(shè)計有兩個方面，上位機是在 PC 平臺上運用 LabVIEW 軟件開發(fā)檢測界面，并且直觀的觀察溫度變化曲線，根據(jù)需要還可以以 Excel 表格的形式，保存檢測的歷史數(shù)據(jù) ，根據(jù)實時采集的溫度數(shù)據(jù)和設(shè)定值比較，提示溫度報警 ；下位機是通過單片機 89E52 讀取溫度數(shù)據(jù) ，通過 RS232 轉(zhuǎn) USB 接口，動如上位機中進行分析處理 。 LabVIEW 的通信模 塊 NIVISA 在 版本之后開始支持 USB 串口，使下位機與LabVIEW 通信時可以不通過數(shù)據(jù)采集卡接收下位機的監(jiān)測數(shù)據(jù)，使 LabVIEW 的靈活性和實用性更好，節(jié)約了硬件部分的成本。 關(guān)鍵詞 ： LabVIEW； 接口技術(shù) ； 單片機；溫度 II Abstract With the continuous development of measurement and control technology, and its technology is toward automation, intelligent, digital and work development. The pany put forward the NI software is instrument concept, so LabVIEW arises at the historic moment. Detection in today39。s society in many of the industry with or lack of, some environmental bad place is also can not get away from remote detection system. This design is solved some heavy industry, pharmaceutical industry, etc in between some of place is not fit for human in, still need to temperature detection problem. This design has two sides, the PC is in the PC platform using the LabVIEW software development testing interface, and intuitive observe temperature curve, according to need to also can be in the form of form to Excel, save detection of historical data, according to the realtime data acquisition data and the temperature of the set value parison, tip temperature alarm。 The machine is through a single chip puter 89 E52 read temperature data, through the RS232 turn USB interface, move as a machine for analysis. This design is used to RS232 serial line USB for PC and a machine under the munication. The munication module LabVIEW NIVISA in version began after support USB serial ports, make the next place machine and can not through LabVIEW munication data acquisition card takes a machine under the monitoring data, make the flexibility and practical better LabVIEW, save the hardware part of the cost. Key words: LabVIEW。 Interface technology。 MCU。 temperature III 目 錄 摘 要 ................................................................................................................................. I Abstract...............................................................................................................................II 1 緒 論 .......................................................................................................................... 1 課題的研究目的及意義 ................................................................................... 1 課題的國內(nèi)外研究現(xiàn)狀 ................................................................................... 2 課題研究的主要內(nèi)容 ....................................................................................... 3 2 虛擬儀器概述 .............................................................................................................. 4 虛擬儀器的概念 ............................................................................................... 4 虛擬儀器的主要特點 ....................................................................................... 4 虛擬儀器的體系結(jié)構(gòu) ....................................................................................... 5 虛擬儀器的硬件構(gòu)成 ............................................................................ 5 虛擬儀器的軟件構(gòu)成 ............................................................................ 7 LabVIEW 的概述 .............................................................................................. 7 LabviEW 的應(yīng)用現(xiàn)狀 ....................................................................................... 9 本章小結(jié) ......................................................................................................... 10 3 總體設(shè)計 .................................................................................................................... 11 系統(tǒng)實現(xiàn)的功能 ................................................................................................ 11 總體設(shè)計方案 ................................................................................................. 11 本章小結(jié) ......................................................................................................... 12 4 上位機 LabVIEW 的程序設(shè)計 .................................................................................. 13 USB 接口設(shè)計 ................................................................................................ 13 USB 系統(tǒng)的結(jié)構(gòu) ............................................................................................ 14 USB 系統(tǒng)概述 ..................................................................................... 14 USB 主機 ............................................................................................. 15 USB 設(shè)備 ............................................................................................. 15 NIVISA 概述 ................................................................................................. 16 N1VISA 簡介 ...................................................................................... 16 與 NlVISA 相配合的 LabVIEW 模板中 VI 子節(jié)點 ......................... 16 IV USB 設(shè)備讀寫的操作次序 ................................................................. 17 LabVIEW2021 中串口的配置 ........................................................................ 17 上位機 LabVIEW 程序的前面板和程序框圖 ............................................... 18 數(shù)據(jù)處理 .............................................................................................. 18 LabVIEW 的前面板和各個部分的功能