毕业设计（论文）
基于LabVIEW的虚拟示波器的设计和实现
系 别 专业名称 班级学号 学生姓名 指导教师
自动化工程系 测控技术与仪器
5080911 高尚 吴朝霞
2012年6月15日
东北大学秦皇岛分校毕业设计（论文） 第 I 页 基于LabVIEW的虚拟示波器的设计和实现
摘 要
随着微电子集成技术和微计算机技术的飞速发展，现代虚拟示波器作为一种精密电测仪器得到了更快的发展，其功能越来越强、精度越来越高，而且外形越来越美观。但现有的虚拟示波器价格普遍偏高，使其应用受到一定限制。充分利用虚拟现实技术研究功能强大、性价比高的虚拟数字示波器，使之能更好地满足实际应用的需求，具有很好的现实意义。
本文介绍了虚拟仪器的研究背景和意义以及国内外的一些研究进展。接下来对虚拟仪器总体进行了概述，讨论了虚拟仪器的概念、构成、特点、发展建立了虚拟仪器的基本框架,在此基础上，进行了虚拟示波器的系统设计。完成了虚拟示波器各模块的详细设计，包括数据采集模块、用户界面模块、频谱分析模块、双通道信号发生模块、波形显示模块和参数计算模块的设计，还讨论了软件设计中的技术问题。
该示波器主要用于电子测量仪器教学,让学生掌握示波器的工作原理、示波器的测试和示波器的主要控键。设计中我们通过模拟信号发生器产生的多通道信号对多种控制参数进行了设置、实时采集、处理、显示和存储等功能的试验，但在进行硬件试验时并未成功。另外在程序的繁琐程度，资源的利用率方面仍有改进的需要。
关键词：LabVIEW；示波器；虚拟仪器；采集卡
I
东北大学秦皇岛分校毕业设计（论文） 第 II 页 Design and Implementation of the Virtual Oscilloscope Based on
LabVIEW
Author：Gao Shang
Tutor：Wu Zhao Xia
Abstract
With the rapid development of integrated microelectronics technology and microcomputer technology, modern digital storage oscilloscope as a precision electrical measuring instruments to develop faster, more powerful, higher and higher precision, but more and more shapebeautiful. However, the existing digital storage oscilloscope prices are generally high, its application is subject to certain restrictions. Make full use of virtual reality technology is a powerful, cost-effective virtual digital oscilloscope, so that it can better meet the needs of practical application, with good practical significance.
This paper introduces the research background and significance of the virtual instrument, as well as some progress at home and abroad. Next on the virtual instrument overall, to discuss the concept of virtual instruments, composition, characteristics, development has established the basic framework of the virtual instrument, on this basis, the system design of the virtual oscilloscope. Completed the detailed design of the virtual oscilloscope module, including the data acquisition module, the user interface module, a spectrum analysis module, dual-channel signal generation module, waveform display module and parameters to calculate the module design, and also discussed the technical aspects of software design.
The oscilloscope is mainly used for electronic measuring instruments and teaching, enable students to acquire the works of the oscilloscope, oscilloscope test and the oscilloscope control key. Multichannel signal design, analog signal generator to generate a variety of control parameters, settings, real-time acquisition, processing, display and storage of the test, but during the hardware test did not succeed. In addition, there is still room for improvement in the red tape of the program, the resource utilization needs.
Key Words:LabVIEW; oscilloscope; virtual instrument; data acquisition card
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