基于LabVIEW的海水溫度測量系統(tǒng)設(shè)計

測控論文編號:CK122   論文字?jǐn)?shù):14234,頁數(shù):42

目 錄
摘要……………………………………………………………………………. ……..…………..I
Abstract……………………………………………………………………. ……..….………..II
1 緒論…………………………………………………….……………………………..………..1
1.1  課題的提出…………………………………………………………………..…….……1
1.2  海底溫度測量技術(shù)的發(fā)展和現(xiàn)狀…………………………………………..…….……1
 1.2.1溫度傳感器測量海洋溫度………………………………………….……….……1
 1.2.2用聲波測量海洋溫度……………………………………………….……….……2
1.3 研究的基本內(nèi)容與擬解決的主要問題…………………………………………….……3
2 系統(tǒng)分析………………………………………………………………………….……...……4
2.1  系統(tǒng)概述……………………………………………………………………..…….……4
2.2  傳感器的選擇…………………………………………………………….….…….……4
2.3  信號調(diào)理………………………………………………………………….….…….……5
2.4  數(shù)據(jù)采集……………………………………………………………….…….….….……6
 2.4.1 NI-BNC 2120接線盒………………………………………………….….….……6
 2.4.2 數(shù)據(jù)采集卡PCI－6014……………………………………………………..……7
2.5  虛擬儀器技術(shù)………………………………………………….…………….….….……7
 2.5.1虛擬儀器技術(shù)簡介…………………………………………………….….….……7
 2.5.2虛擬儀器技術(shù)的現(xiàn)狀…………………………………………………..…….……8
 2.5.3 用虛擬儀器技術(shù)進(jìn)行系統(tǒng)設(shè)計的前景……………………………….…….……9
 2.6  系統(tǒng)搭建………………………………………………….…………….……….….……9
3  測試軟件的開發(fā)……………………………………………….………………….………...11
3.1 軟件開發(fā)工具(LabVIEW) …………………………………….…..……………………...11
3.2 軟件開發(fā)環(huán)境……………………………………………….……………….….………...12
3.3 軟件開發(fā)步驟……………………………………………….…………….…….………...12
3.4 詳細(xì)程序設(shè)計……………………………………………….……………….….………...13
 3.4.1通道設(shè)置…………………………………………….……………….….………....13
 3.4.2通道內(nèi)容…………………………………………….……………….….………...17
 3.4.3通道測試…………………………………………….……………….….………...18
 3.4.4通道模擬信號……………………………………….……………….….………...19
 3.4.5程序框圖…………………………………………….……………….….………...20
4  測試結(jié)果及分析…………………………………………………….……………………..26
5  總結(jié)…………………………………………………………………………………………..27
致謝………………………………………………………………………………………….…...28
參考文獻(xiàn)………………………………………………………………………………………...29
附錄………………………………………………………………………………….…………...31

摘  要
 傳統(tǒng)溫度測試儀器主要由硬件構(gòu)成，因而成本和規(guī)模都比較大，操作也不方便，另外在很多實(shí)際問題中，僅僅用精確數(shù)值對被測對象進(jìn)行描述是不夠的。針對以上問題，本文介紹了基于虛擬儀器技術(shù)設(shè)計的海水溫度測試系統(tǒng)。將高性能的數(shù)據(jù)采集卡PCI-6014與傳感元件和調(diào)理電路于一體，構(gòu)建成了溫度測試硬件系統(tǒng)，軟件基于LabVIEW虛擬儀器開發(fā)平臺，采用模塊化設(shè)計，實(shí)現(xiàn)了檢測信號的實(shí)時采集、數(shù)據(jù)處理、數(shù)據(jù)顯示等功能。
 虛擬儀器是由計算機(jī)硬件資源、模塊化儀器硬件和用于數(shù)據(jù)分析、過程通訊及圖形用戶界面顯示的軟件組成的測控系統(tǒng)，是一種由計算機(jī)操縱的模塊化儀器系統(tǒng)。本論文有效地運(yùn)用了LabVIEW虛擬儀器技術(shù)，將諸多重要步驟都在配備硬件的普通PC電腦上完成，使得整個測量的重點(diǎn)轉(zhuǎn)向軟件的設(shè)計，是虛擬儀器技術(shù)應(yīng)用于溫度測量領(lǐng)域的一個典型范例。
 
關(guān)鍵詞：虛擬儀器； LabVIEW； 溫度測試

Abstract
The traditional measuring instrument of temperature mainly consists of different types of hardware, whose cost and scale are quite big, and whose operation is inconvenient. In many practical applications, describing the measured objects only by accurate values is not enough. Aiming at these problems, the design of sea temperature test system based on Virtual Instrument has been introduced in this paper.  The temperature test system combines high performance PCI-6014 data acquisition card with sensor elements and amplifying circuit. On the basis of LabVIEW software platform, an application software for temperature measurement has been designed, whose functions include real-time acquisition of test signal, data processing and data display.
A virtual instrument consists of an industry-standard computer or workstation equipped with powerful application software, modularization hardware such as plug-in boards, and driver software, which can fulfill the functions of traditional instruments. The LabVIEW virtual instrument technology has been efficiently used to complete many important processes in common PC computer which is integrated of hardwares. So it makes the key point of the measurement move to software design. Temperature measurement by virtual instrument is a typical application of virtual instrument technology.
 
Keywords：Virtual Instrument；LabVIEW；Temperature test