信息工程通信外文翻譯外文文獻(xiàn)英文文獻(xiàn)基于虛擬儀器的信號(hào)發(fā)生器的設(shè)計(jì)與實(shí)現(xiàn)(參考版)
2024-12-10 10:06本頁面
【正文】 Labview is a graphical programming language, mainly used to develop data acquisition, instrument control and data processing and analysis software. Currently, the development of software is popular in the international test, measurement and control industry , measurement and control areas in the country has also been widely used. Function Generator is a generic instrument widely used in scientific research and engineering design。 譯 文 The generation background of virtual instrument Today we are in a highly developed information society, which require a limited time and space to achieve a large amount of information exchange, inevitably bring about the rapid increase of information density， required the electronic systems have a faster speed and more powerful function for information processing. On the one hand the development of electronic technology and market requirements objectively make the test instrument develop to the direction of automation and flexible, On the other hand, the electronic technology and market development also make virtual instrument possible. In this situation, the virtual instruments based on microputer gradually bee a reality, its appearance and extensively use provide an excellent model for the design of test system and allows engineers more powerful and flexible in measure and control. 2 、 The concept of virtual instrument Virtual Instruments (Virtual Instrument, referred to as VI) concept is first proposed by the National Instruments (NI) in 1980s39。更重要的是，對(duì)于傳統(tǒng)的信號(hào)發(fā)生器，其功能一旦確定便不能更改，用戶要想使用新的功能則必須重新 購買新的儀器，傳統(tǒng)信號(hào)發(fā)生器的不足是顯而易見的。隨著現(xiàn)代電子、計(jì)算機(jī)和信號(hào)處理等技術(shù)的發(fā)展，極大促進(jìn)了數(shù)字化技術(shù)在電子測(cè)量?jī)x器中的應(yīng)用，使原有的模擬信號(hào)處理逐步被數(shù)字信號(hào)處理所代替，從而擴(kuò)充了儀器信號(hào)的處理能力，提高了信號(hào)測(cè)量的準(zhǔn)確度、精度和變換速度，克服了模擬信號(hào)處理的諸多缺點(diǎn)，數(shù) 字信號(hào)發(fā)生器隨之發(fā)展起來。 信號(hào)發(fā)生器 (signal generator)又稱信號(hào)源或振蕩器， 是一種能提供各種頻率、波形和輸 出電平電信號(hào)，常用作測(cè)試的信號(hào)源或激勵(lì)源的設(shè)備。當(dāng)前應(yīng)該解決的是如何使虛擬儀器和現(xiàn)有儀器配合，挖掘現(xiàn)有儀器的潛力，達(dá)到逐步淘汰和取代傳統(tǒng)儀器的目的。而且，隨著測(cè)試儀器的數(shù)字化、計(jì)算機(jī)化的發(fā)展趨勢(shì)，傳統(tǒng)測(cè)試儀器漸漸有被取代的趨勢(shì)。 虛擬儀器作為教學(xué)的新手段，已慢慢地走進(jìn)了電子技術(shù)的課堂和實(shí)驗(yàn)室，正逐漸改變著電子技術(shù)教學(xué)的傳統(tǒng)模式，這也是現(xiàn)代教育技術(shù)發(fā)展的必然。測(cè)控儀器將會(huì)向高效、高速、高精度和高可靠性以及自動(dòng)化、 智能化和網(wǎng)絡(luò)化的方向發(fā)展。 4. 虛擬儀器的發(fā)展方向 虛擬儀器作為新興的儀器儀表，其優(yōu)勢(shì)在于用戶可自行定義儀器的功能和結(jié)構(gòu)等，且構(gòu)建容易、轉(zhuǎn)換靈活，它已廣泛應(yīng)用于電子測(cè)量、聲學(xué)分析、故障診斷、航天航空、機(jī)械工程、建筑工程、鐵路交通、生物醫(yī)療、教學(xué)及科研等諸多方面。 圖形化程序設(shè)計(jì)編程簡(jiǎn)單 、直觀、開發(fā)效率高。 提供大量與外部代碼或軟件進(jìn)行連接的機(jī)制，諸如 DLL(動(dòng)態(tài)連接庫 )、
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