基于LabVIEW的虚拟双踪示波器的设计.doc

西安交通大学城市学院本科生毕业设计（论文） 摘要 PAGE 8 PAGE 39 摘 要 示波器是科学研究和工程设计中广泛应用的一种通用仪器。虚拟数字存储示波器是虚拟仪器技术的一种具体应用，主要由数据采集、数据处理和结果显示三大部分组成。其中，数据处理和结果显示由计算机软件系统来完成，只有数据采集是在软件的控制下由硬件来完成。 本文主要利用功能强大的图形化虚拟仪器开发平台LabVIEW，完成虚拟双踪示波器的设计。 本设计采用模块化的设计思想，将每个功能均由一个模块来完成。其中主要包括由信号发生、触发控制和采样控制组成的数据采集模块，由滤波、频谱分析、加窗处理和波形存储及回放组成的信号分析及处理模块，时基控制的波形显示模块。数据处理和结果显示都是由计算机软件系统来实现的，而数据采集则是在软件的控制下由硬件来完成的。本文所设计的虚拟示波器除具有通用功能外，又优于普通示波器，具有自身的优点，如滤波、频谱分析、波形的存储和调用，其成本低廉，功能可根据应用的需要不断地扩展。 最后对虚拟示波器进行了系统测试和性能分析，实验结果达到了预先的设计要求。 关键词：虚拟仪器，虚拟双踪示波器，LabVIEW ABSTRACT ABSTRACT ABSTRACT Scope of scientific research and engineering design is a widely used general-purpose equipment. Virtual Digital Storage Oscilloscope is a kind of virtual instrument technology specific application, mainly by the data acquisition, data processing and the results showed three major components. Among them, the data processing and results accomplished by the computer software system, only the data acquisition is under the control of the software from the hardware to complete. This paper mainly using powerful graphical LabVIEW virtual instrument development platform, completed the design of virtual oscilloscope double steps. This design USES the modular design thought, will each function all by a module to complete. Include the signal happen and trigger the control and sampling control the data acquisition module, composed by filtering, spectrum analysis, add window treatment and waveform storage and playback of signal analysis and processing module, the time base control of the waveform display module. Data processing and the results showed that are made by computer software system to achieve, and the data acquisition is under the control of the software by the hardware to finish. In this paper, the design of virtual oscilloscope is in addition to the general function, and better than the ordinary oscilloscope, which has its own advantages, such as filtering, spectrum analysis, waveform, the storage and call low cost, according to the needs o