IC693MDL754
IC693MDL754
IC693MDL754
轉(zhuǎn)換和調(diào)理的專用硬件）結(jié)合起來從而把計(jì)算機(jī)的強(qiáng)大運(yùn)算存儲(chǔ)和通信能力與功能硬件的測(cè)量和轉(zhuǎn)換能力融為一體，形成一種多功能，高精度，可靈活組合并帶有通信功能的測(cè)試技術(shù)平臺(tái)。
在電子測(cè)量中它可以代替?zhèn)鹘y(tǒng)的示波器，邏輯分析儀、信號(hào)發(fā)生器和頻譜分析儀等，在工業(yè)控制系統(tǒng)中所有以計(jì)算機(jī)為核心的自動(dòng)化裝置也都可以歸納到虛擬儀器的范圍內(nèi)，哪它可以代替通常安裝在控制室中的常規(guī)調(diào)節(jié)器、手操器、指示儀和報(bào)警器等。在使用虛擬儀器時(shí)，用戶可通過顯示屏上的友好界面來操作計(jì)算機(jī)，就像在操作自己定義的一臺(tái)臺(tái)傳統(tǒng)的儀器儀表一樣，從而完成對(duì)被測(cè)量的采集、分析、判斷、調(diào)節(jié)和存儲(chǔ)等功能。
一、 虛擬儀器的發(fā)展歷史
虛擬儀器技術(shù)的開發(fā)和應(yīng)用起源于1986年美國車家儀器公司（NI）設(shè)計(jì)的Lab VIEW軟件，這是一種基于圖形的開發(fā)、調(diào)試和運(yùn)行的軟件平臺(tái)。它實(shí)現(xiàn)了NI公司提出的“軟件即儀器”的理念。虛擬儀器的發(fā)展大致可分為三個(gè)階段，第一階段是利用計(jì)算機(jī)來增強(qiáng)傳統(tǒng)儀器的功能，由于通用接口總線GPIB標(biāo)準(zhǔn)的確立，計(jì)算機(jī)與外部儀器通信成為可能，因此把傳統(tǒng)的儀器通過串行口和計(jì)算機(jī)連接起來后就可以用計(jì)算機(jī)控制儀器了。第二階段主要在功能硬件上實(shí)現(xiàn)了了大技術(shù)進(jìn)步，其一是插入計(jì)算機(jī)總線槽上的數(shù)據(jù)采集（PLUG-IN PC-DAQ）的出現(xiàn)，其二是VXI儀器總線標(biāo)準(zhǔn)的確立，這些新技術(shù)的應(yīng)用奠定了虛擬儀器硬件的基礎(chǔ)。第三階段形成了虛擬儀器體系結(jié)構(gòu)的基本框架，這主要是由于采用面向?qū)ο蟮木幊碳夹g(shù)構(gòu)筑起了幾種虛擬儀器的平臺(tái)，并逐漸成為標(biāo)準(zhǔn)的軟件開發(fā)工具，由于虛擬儀器技術(shù)的飛速發(fā)展，這三個(gè)發(fā)展階段幾乎是同步進(jìn)行的。
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