基于LabVIEW锁相调频与鉴频电路远程实验的开发
发布时间：2018-11-12 11:27
【摘要】：随着测量仪器向着数字化、计算机化的方向发展，虚拟仪器正逐渐取代了传统的测试仪器。在实验中使用虚拟仪器，不但可以节省大量仪器的经费投入，免去维护仪器的复杂工作及排除仪器故障所需的大量时间与精力，同时也能够调动学生的积极性，使学生更加专注于对知识的理解而不是仪器的调试。 由美国NI(National Instruments)公司开发的Multisim软件平台将原理图输入、工业标准的SPICE仿真集成在同一环境中，可方便地仿真和分析电路。NI ELVIS II+是基于图形化编程语言LabVIEW的系统开发设计平台。 本课题以NE564模拟锁相环构成的调频及鉴频电路的设计为主线，首先阐述了调频与鉴频的基本原理以及由NE564构成的锁相调频和鉴频电路的基本工作原理，通过在Multisim软件中的芯片建模对NE564进行深入分析，用晶体管创建其内部结构，同时引入其SPICE模型，通过对电路性能的测试，验证了两种方法对芯片建模的正确性，再进行锁相调频鉴频电路设计、运用Multisim完成电路性能的仿真分析，然后以虚拟仪器为测试工具开发出高频电子线路实验教学系统，最终在NI ELVIS平台实现硬件电路，通过虚拟仪器调用完成系统性能调试。 再开发出一个完整的远程实验控制平台，从开发的平台中调用LabVIEW中的虚拟仪器，，将数据从ELVIS平台进行采集，完整的将基于NE564的锁相调频与鉴频实验远程控制平台展现在PC机上，运用NI公司图形化编程语言LabVIEW结合Multisim、DAQmx开发了基于NE564的锁相调频和鉴频远程实验程序。程序主要包括5个模块：锁相调/鉴频原理介绍模块、参数配置模块、仿真模块、频谱仪分析模块和示波器分析模块。介绍了每个模块的运行流程和运行原理，运用基于LabVIEW的虚拟仪器对电路性能进行测量与分析。课题对系统电路开发及测试的过程，与传统的电路设计方法相比，使教学实践环节突破了时间和空间的局限，充分体现出了EDA设计及虚拟仪器的优越性。 论文的研究成果为远程实验的开发与应用做了有益的探索。
[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.
【学位授予单位】：东华大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TN761.2;TN763.2
本文编号：2326973
[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.
【学位授予单位】：东华大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TN761.2;TN763.2
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