需要金幣： 1000 個(gè)金幣 |
資料包括：完整論文 |  |
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| 轉(zhuǎn)換比率：金額 X 10=金幣數(shù)量， 例100元=1000金幣 | 論文字?jǐn)?shù)：9973 |  | |
| 折扣與優(yōu)惠：團(tuán)購最低可5折優(yōu)惠 - 了解詳情 | 論文格式：Word格式(*.doc) |  |
摘要：虛擬儀器技術(shù)的提出和發(fā)展標(biāo)志著二十一世紀(jì)自動(dòng)測(cè)試與電子測(cè)量?jī)x器領(lǐng)域技術(shù)發(fā)展的一個(gè)重要方向。該技術(shù)是在通用的計(jì)算機(jī)平臺(tái)上定義和設(shè)計(jì)儀器的測(cè)試功能，使用者在操作這臺(tái)計(jì)算機(jī)時(shí)就像在使用一臺(tái)自己設(shè)計(jì)的專用的傳統(tǒng)電子儀器。操作人員可通過友好的圖形化用戶界面和圖形化編程語言來控制儀器的啟動(dòng)、運(yùn)行和結(jié)束，完成對(duì)被測(cè)信號(hào)的數(shù)據(jù)采集、信號(hào)分析、譜圖顯示、波形圖顯示、故障診斷、數(shù)據(jù)存儲(chǔ)以及控制輸出等功能。 在虛擬儀器系統(tǒng)中,硬件解決信號(hào)的輸入和輸出,軟件可以方便地修改、改變儀器系統(tǒng)的功能,以適應(yīng)不同使用者的需要。其中信號(hào)的輸入部分一般使用數(shù)據(jù)采集 卡實(shí)現(xiàn)。商用的數(shù)據(jù)采集卡具有較大的通用性,但其價(jià)格昂貴,在具體的應(yīng)用場(chǎng)合,有些功能可能并不實(shí)用。普通聲卡,具有16位量化精度,數(shù)據(jù)采集頻率為44 kHz,完全可以滿足特定應(yīng)用范圍內(nèi)數(shù)據(jù)采集的需要,個(gè)別性能指標(biāo)還優(yōu)于商用數(shù)據(jù)采集卡,而價(jià)格卻為商用數(shù)據(jù)采集卡的十幾分之一甚至幾十分之一。 論文利用普通聲卡做采集卡,利用美國NI公司的虛擬儀器軟件LabVIEW做開發(fā)平臺(tái),設(shè)計(jì)實(shí)現(xiàn)了一個(gè)虛擬示波器。該系統(tǒng)能夠正確采集聲卡設(shè)計(jì)頻率范圍內(nèi)的信號(hào),實(shí)現(xiàn)了基本示波器的測(cè)量功能和頻譜分析功能,可以用來測(cè)量音頻范圍的信 號(hào)。 關(guān)鍵字：LabVIEW； 聲卡； 數(shù)據(jù)采集； 虛擬儀器
Abstract：The proposal and development of virtual instrument technology marks the directionof the automatic test and electronic measurement at 21st century. This technology defines in general computer platforms and designs the test function of instrument, when users operating the computer like using a traditional electronic instrument. Operators can control to start, operate and end it through graphical user interface and graphical programming language, and then accomplish data acquisition, signal analysis and spectrum chart shows, waveform figure shows, faults diagnosis, data storage and output control, and other functions of the measured signal. In virtual instrument system, hardware solve the problem of input signal and output signal, the software can be easily modifiing, changing the function of instrument system, in order to adapt to the needs of different users. Part of the input signal is generally realizing by the data acquisition card. Commercial data acquisition card is more general, more expensive but some functions may be unpractical. Ordinary soundcard, with 16 quantitative precision, 44 kHz data acquisition frequency, can meet the need of data collection in specific application range, and the individual performance index is also better than commercial data acquisition card, but the prices of commercial data acquisition card is more expensive. This paper designes and realizes a virtual oscillograph with common audio card and LabVIEW virtual instrument software. The system can correctly acquisite the singal and realize the functions of measurement and spectrum analysis as basic oscilloscope. Key words : Virtual Instrument; Labview; Signal Generator |
