【正文】 摘 要 生產(chǎn)過程參數(shù)的智能監(jiān)測(cè)是實(shí)現(xiàn)自動(dòng)化的重要標(biāo)志，監(jiān)測(cè)到的數(shù)據(jù)需要進(jìn)行實(shí)時(shí)采集、傳送、處理。隨著計(jì)算機(jī)技術(shù)、通信技術(shù)的迅速發(fā)展，虛擬儀器率先由美國(guó)于20 世紀(jì) 80 年代末研制成功，它是計(jì)算機(jī)系統(tǒng)與儀器系統(tǒng)技術(shù)相結(jié)合的產(chǎn)物。其運(yùn)用配套的虛擬儀器開發(fā)軟件，借助 PC 機(jī)超強(qiáng)的計(jì)算處理能力而被廣泛的運(yùn)用于工廠的各種數(shù)據(jù)監(jiān)測(cè)與處理。本設(shè)計(jì)為多通道壓力監(jiān)測(cè)系統(tǒng)，用來監(jiān)測(cè)來自各處不同的壓力變化情況。實(shí)現(xiàn) 4路壓力的實(shí)時(shí)監(jiān)測(cè)、波形顯示。具體為應(yīng)用 LabVIEW 圖形化編程軟件和 LabJackU12 數(shù)據(jù)采集卡設(shè)計(jì) 4 通道壓力監(jiān)測(cè)系統(tǒng)，采用壓力傳感器，對(duì) 4 路壓力數(shù)據(jù)進(jìn)行采集、分析處理、存儲(chǔ)顯示，實(shí)現(xiàn)壓力數(shù)據(jù)的曲線和數(shù)字實(shí)時(shí)顯示，并具有超限報(bào)警功能，并對(duì)數(shù)據(jù)進(jìn)行統(tǒng)計(jì)分析，利用 EXCEL 工具箱實(shí)現(xiàn)報(bào)表輸出。本系統(tǒng)包括三個(gè)基本硬件部分：壓力傳感器，數(shù)據(jù)采集卡，PC 機(jī)。其中，壓力測(cè)量利用 AK4 型數(shù)字壓力傳感器，傳感器輸出的 420mA 信號(hào)送入調(diào)理電路轉(zhuǎn)換為 15V電壓信號(hào)，再送入 LabJack U12 數(shù)據(jù)采集卡將模擬量到數(shù)字量的轉(zhuǎn)換，并輸入到 PC 機(jī)中，然后利用 PC 機(jī)中的 LABVIEW 圖形化編程軟件將輸入的電壓信號(hào)處理輸出并且顯示，并對(duì)信號(hào)進(jìn)行分析對(duì)超限信號(hào)起到報(bào)警功能。關(guān)鍵詞：壓力監(jiān)測(cè) LABVIEW 數(shù)據(jù)采集ABSTRACTIntelligent monitoring of the production parameters is an important symbol to automate. The monitoring of the data requires realtime acquisition, transmission, processing. With puter technology, munication technology, the rapid development of the first virtual instrument was developed in the late 80 by the United States in the late 20th century, the successful development of puter systems and equipment, it is the product of the bination system technology. Its application supporting the development of virtual instrument software, with PCsuperputing processing power has been widely used in a variety of plant data monitoring and processing. The design for the multichannel pressure monitoring system, used monitor the pressure from changes in various parts. Pressure to achieve 4way realtime monitoring, waveform display. Specifically for the application of LabVIEW graphical programming software and LabJackU12 Data Acquisition Card Design 4channel pressure monitoring system, using pressure sensors, pressure on the 4way data collection, analysis and processing, storage, display, realization of the curve of pressure data and digital realtime display, and has The more limited alarm functions, and statistical analysis of data using EXCEL toolbox to achieve report output. The system consists of three basic hardware ponents: pressure sensors, data acquisition card, PC machine. Among them, pressure measurement using AK4 type digital pressure sensor, the sensor output 420mA signal into the conditioning circuit is converted to 15V voltage signal, and then into the LabJack U12 data acquisition card will be analog to digital conversion, and enter the to a PC machine and then use the PC, the LABVIEW graphical programming software to input the output voltage signal processing and displays, and signal analysis of the overrun alarm signal to play. Key words: Pressure monitor Labview Data acquisition 目 錄第一章 緒論.............................................................................................................................5 引言...................................................................................................................................5 課題的提出與意義 ..........................................................................................................6 課題的實(shí)現(xiàn) .......................................................................................................................6第二章 壓力監(jiān)測(cè)系統(tǒng)總體設(shè)計(jì).............................................................................................7 設(shè)計(jì)思路 ...........................................................................................................................7第三章 壓力傳感器.................................................................................................................9 壓力傳感器定義 ..............................................................................................................9 壓力傳感器分類 ..............................................................................................................9 傳感器的使用原則 ..........................................................................................................9 傳感器的選用 ................................................................................................................11 傳感器的選用..........................................................................................................11 AK4 型壓力傳感器特點(diǎn) ........................................................................................12 AK4 型壓力傳感器性能技術(shù)指標(biāo) ........................................................................12第四章 數(shù)據(jù)采集...................................................................................................................13 數(shù)據(jù)采集 .........................................................................................................................13 數(shù)據(jù)采集卡 ......................................................................................................13 簡(jiǎn)介 .......................................................................................................14 數(shù)據(jù)采集硬件配置...................................................................................................15 數(shù)據(jù)采集的軟件驅(qū)動(dòng)...............................................................................................15第五章 虛擬儀器的概述.......................................................................................................17 虛擬儀器的概念 ............................................................................................................17 虛擬儀器的組成 ............................................................................................................18 虛擬儀器的特點(diǎn)及優(yōu)勢(shì) ................................................................................................20 虛擬儀器與傳統(tǒng)儀器的比較 ........................................................................................21第六章 軟件設(shè)計(jì)...................................................................................................................23 程序主界面 .....................................................................................................................23 程序各部分設(shè)計(jì) ......................