虚拟信号发生器设计及远程实现

论文编号:JD885  附开题报告,任务书,源代码,外文翻译,论文字数:18824,页数:31

摘要: 虚拟仪器是由一些必要的硬件获取调理信号，并以通用计算机为平台，实现不同测量软件对采集获得信号进行分析处理及显示。它改变了传统电子测量仪器的概念和模式，用户完全可以自己定义仪器的功能和参数，即“软件既是仪器”。计算机技术与网络技术的飞速发展，使得虚拟仪器已经成为现代电子测量仪器发展的趋势。
本文介绍了一种以LabVIEW为开发平台，能够产生正弦波、三角波、方波、锯齿波和任意波测试信号发生器，其平率、幅值、相位、电压偏置等参数可以设置，不但输出波形参数可调、而且可同步显示。本系统通过采用TCP/IP技术来实现远程数据传输功能，当两台计算机设置好端口后，就可以进行数据传输。
与传统仪器相比，本系统具有高效、开放、使用灵活、功能强大、性价比高、可操作性好等明显优点，可用于医疗，工程等精密仪器的测试，具有较强的实用性和开发价值。
关键词:虚拟仪器; Labview; 函数信号发生器;网络通信

The design of virtual signal generator and remote reslization
Abstract: The virtual instrument which conditioning signals is gained by some essential hardware. It takes the general-purpose computer as a platform and the signal is realized through the different measurement software, such as signal’s analyze, process and display etc. The concept and mode of traditional measuring instruments are changed, the parameters and functions can be transformed by the user, namely, "software is the instrument". With the rapid development of computer and network technology, the virtual instrument has become a developing trend of modern electronic measuring instruments.
In this paper development platform LabVIEW is introduced firstly, then the test signals of Sine, triangle, square sawtooth and arbitrary waveform is described in the virtual signal generator. The functions of signal generator are set, such as frequency, amplitude, phase, voltage bias etc. Not only output parameters can be adjusted but also the corresponding wave is acquired simultaneously in this system. The function of remote data transmission is performed by TCP/IP technology. Data is transported when the port parameters between two computers are set. 
Compared with traditional machines, advantages of the virtual instrument are showed in efficiency, opening, easy using, strong function, cost-effective and operation etc. It can be used for testing of medical and engineering precision instruments.

Key words：Virtual instrument，LabVIEW， Function generator，Network Communication

  摘要 
1.绪论  1
1.1虚拟仪器背景介绍  1
1.2虚拟仪器系统的构成  1
1.2.1虚拟仪器的构建技术  1
1.2.2虚拟仪器的硬件组成  2
1.2.3虚拟仪器的软件结构  2
1.3虚拟仪器与传统仪器的比较  3
1.4本课题的重要意义  3
2. 构建虚拟信号发生器的基础  3
2.1测量用信号源的作用与分类  3
2.2正弦信号发生器的组成  4
2.3正弦信号发生器的主要性能指标  5
2.4传统函数信号发生器的工作原理  7
2.5基于虚拟仪器技术的信号发生器的设计和应用  9
2.5.1 虚拟信号发生器的提出  9
2.5.2 虚拟信号发生器的设计  9
2.5.3 虚拟信号发生器的应用  10
3.虚拟函数信号发生器的实现  10
3.1 LabVIEW简介  10
3.2实现方案  10
3.2.1系统的总体设计思路介绍  10
3.2.2虚拟函数信号发生器的用户界面  11
3.2.3虚拟函数信号发生器的程序图设计  12
3.3虚拟函数信号发生器的各子模块设计  13
3.3.1数字波形产生模块  13
3.3.2频率单位变化控制模块  16
3.3.3相位变化控制模块  17
3.3.4.数据存储模块  18
3.4仪器功能描述  19
4.虚拟仪器的远程实现  19
4.1远程虚拟仪器系统介绍  19
 4.1.1远程虚拟仪器系统的概念  19
4.1.2远程虚拟仪器国内外发展的现状  19
4.2 远程虚拟仪器系统的开发方案  20
4.2.1 Socket技术概述  20
4.2.2Socket网络通信机制  21
4.2.3服务器端程序的开发  22
4.2.4客户端程序的开发  23
4.3远程虚拟仪器系统的实现  25
4.3.1远程虚拟仪器的网络结构及组成  25
4.3.2远程虚拟仪器的网络结构  27
4.3.3基于web的虚拟仪器  27
5结论  28
参考文献  30
致谢  31