【摘要】：隨著測(cè)量?jī)x器向著數(shù)字化、計(jì)算機(jī)化的方向發(fā)展，虛擬儀器正逐漸取代了傳統(tǒng)的測(cè)試儀器。在實(shí)驗(yàn)中使用虛擬儀器，不但可以節(jié)省大量?jī)x器的經(jīng)費(fèi)投入，免去維護(hù)儀器的復(fù)雜工作及排除儀器故障所需的大量時(shí)間與精力，同時(shí)也能夠調(diào)動(dòng)學(xué)生的積極性，使學(xué)生更加專注于對(duì)知識(shí)的理解而不是儀器的調(diào)試。 由美國(guó)NI(National Instruments)公司開(kāi)發(fā)的Multisim軟件平臺(tái)將原理圖輸入、工業(yè)標(biāo)準(zhǔn)的SPICE仿真集成在同一環(huán)境中，可方便地仿真和分析電路。NI ELVIS II+是基于圖形化編程語(yǔ)言LabVIEW的系統(tǒng)開(kāi)發(fā)設(shè)計(jì)平臺(tái)。 本課題以NE564模擬鎖相環(huán)構(gòu)成的調(diào)頻及鑒頻電路的設(shè)計(jì)為主線，首先闡述了調(diào)頻與鑒頻的基本原理以及由NE564構(gòu)成的鎖相調(diào)頻和鑒頻電路的基本工作原理，通過(guò)在Multisim軟件中的芯片建模對(duì)NE564進(jìn)行深入分析，用晶體管創(chuàng)建其內(nèi)部結(jié)構(gòu)，同時(shí)引入其SPICE模型，通過(guò)對(duì)電路性能的測(cè)試，驗(yàn)證了兩種方法對(duì)芯片建模的正確性，再進(jìn)行鎖相調(diào)頻鑒頻電路設(shè)計(jì)、運(yùn)用Multisim完成電路性能的仿真分析，然后以虛擬儀器為測(cè)試工具開(kāi)發(fā)出高頻電子線路實(shí)驗(yàn)教學(xué)系統(tǒng)，最終在NI ELVIS平臺(tái)實(shí)現(xiàn)硬件電路，通過(guò)虛擬儀器調(diào)用完成系統(tǒng)性能調(diào)試。 再開(kāi)發(fā)出一個(gè)完整的遠(yuǎn)程實(shí)驗(yàn)控制平臺(tái)，從開(kāi)發(fā)的平臺(tái)中調(diào)用LabVIEW中的虛擬儀器，，將數(shù)據(jù)從ELVIS平臺(tái)進(jìn)行采集，完整的將基于NE564的鎖相調(diào)頻與鑒頻實(shí)驗(yàn)遠(yuǎn)程控制平臺(tái)展現(xiàn)在PC機(jī)上，運(yùn)用NI公司圖形化編程語(yǔ)言LabVIEW結(jié)合Multisim、DAQmx開(kāi)發(fā)了基于NE564的鎖相調(diào)頻和鑒頻遠(yuǎn)程實(shí)驗(yàn)程序。程序主要包括5個(gè)模塊：鎖相調(diào)/鑒頻原理介紹模塊、參數(shù)配置模塊、仿真模塊、頻譜儀分析模塊和示波器分析模塊。介紹了每個(gè)模塊的運(yùn)行流程和運(yùn)行原理，運(yùn)用基于LabVIEW的虛擬儀器對(duì)電路性能進(jìn)行測(cè)量與分析。課題對(duì)系統(tǒng)電路開(kāi)發(fā)及測(cè)試的過(guò)程，與傳統(tǒng)的電路設(shè)計(jì)方法相比，使教學(xué)實(shí)踐環(huán)節(jié)突破了時(shí)間和空間的局限，充分體現(xiàn)出了EDA設(shè)計(jì)及虛擬儀器的優(yōu)越性。 論文的研究成果為遠(yuǎn)程實(shí)驗(yàn)的開(kāi)發(fā)與應(yīng)用做了有益的探索。
[Abstract]:With the development of digitization and computerization of measuring instruments, virtual instruments are gradually replacing the traditional test instruments. The use of virtual instruments in experiments can not only save a large amount of equipment investment, avoid the complicated work of maintaining the instrument and eliminate the trouble of the instrument, but also arouse the enthusiasm of students. Enable students to focus more on understanding knowledge rather than debugging instruments. The Multisim software platform developed by NI (National Instruments) Company of the United States integrates the schematic diagram and the industrial standard SPICE simulation in the same environment. . NI ELVIS II is a system development and design platform based on graphical programming language LabVIEW. This subject takes the design of frequency modulation and frequency discrimination circuit composed of NE564 analog phase-locked loop as the main line. Firstly, the basic principle of frequency modulation and frequency discrimination circuit and the basic working principle of phase locked frequency modulation and frequency discrimination circuit composed of NE564 are expounded. Through the deep analysis of NE564 by chip modeling in Multisim software, the internal structure of NE564 is created by using transistors, and its SPICE model is introduced. The correctness of the two methods is verified by testing the circuit performance. Then the design of phase-locked frequency modulation circuit is carried out, and the simulation analysis of circuit performance is accomplished by using Multisim, and then the experiment teaching system of high-frequency electronic circuit is developed with virtual instrument as test tool. Finally, the hardware circuit is realized on NI ELVIS platform. The system performance is debugged by virtual instrument call. Then a complete remote experimental control platform is developed. The virtual instrument in LabVIEW is called from the developed platform, and the data is collected from the ELVIS platform. The remote control platform of phase-locked frequency modulation and frequency discrimination experiment based on NE564 is completely displayed on the PC machine. The remote experimental program of phase-locked frequency modulation and frequency discrimination based on NE564 is developed by using NI's graphic programming language LabVIEW and Multisim,DAQmx. The program mainly includes five modules: the introduction module of phase-locked modulation / frequency discrimination principle, parameter configuration module, simulation module, spectrum analysis module and oscilloscope analysis module. This paper introduces the operation flow and principle of each module, and uses virtual instrument based on LabVIEW to measure and analyze the circuit performance. Compared with the traditional circuit design method, the course of the system circuit development and test has made the teaching practice break through the limitation of time and space, and fully embody the superiority of EDA design and virtual instrument. The research results of this paper have made a beneficial exploration for the development and application of remote experiment.
【學(xué)位授予單位】：東華大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TN761.2;TN763.2

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