1、I 基于 LabVIEW 的电子测量系统的设计 摘要：随着科技的发展，虚拟仪器在数据处理中的作用越来越重要。虚 拟仪器的出现，打破了传统仪器由厂家定义，用户无法改变的工作模式，使得用 户可以根据自己的需求，设计自己的仪器系统。在电子测量中，运用虚拟仪器不 仅可以实现对数据模拟仿真，而且可进行采集分析。 本设计主要通过软件 LabVIEW 编程,实现一个电子测量系统。其主要功能包 括虚拟信号发生器、信号调幅解调器、数据采集与分析。虚拟信号发生器实现对 正弦波、三角波、方波、锯齿波的产生。信号调幅解调器，是对信号的调制与还 原。数据采集与分析，通过硬件产生信号，应用数据采集卡采集信号到系统中， 并
2、进行读取与处理。 通过 LabVIEW 的编程，完成了电子测量系统的设计，在一定程度上节约了对 仪器经费的投入，提高了教学科研的质量和效率。 关键词：LabVIEW；虚拟信号；调幅解调；采集；处理 Design of Electronic Measurement System Based on LabVIEW Abstract:With the development of science and technology, virtual instrument in data processing is becoming more an more important. The appearanc
3、e of virtual instrument has broken the working style that the traditinoal instrument was defined by the factory and the users cant change. The virtual instrument can make users design their own instrument system according to their own demands. In electronic measurement, the virtual instrument can be
4、 used to realize the data simulation, data acquisition and analysis. Through the software LabVIEW, the design realizes a electronic measurement system. Its main functions include virtual signal generator, signal amplitude II modulation demodulator, data acquisition and analysis. The virtual signal g
5、enerator can produce sine wave,triangle wave, square wave and sawtooth wave.The signal amplitude modulation demodulator can realize signal modulation and signal recovery. In the data acquisition and analysis, a data acquisition card can be used to collect signals produced by hardware, and begin to r
6、ead and process. The design of electronic measurement system based on LabVIEW can save the equipment investment and improve the quality and efficiency of teaching and scientific research. Keywords:LabVIEW; virtual signals; amplitude modulation and demodution; collection; processing III 目录目录 序 言. 1 第 1 章 虚拟仪器系统的概论 2 1.1 虚拟仪器简介. 2 1.2 LabVIEW 的定义. 2 1.3 LabVIEW 的运行机制 3 第 2 章 总体设计介绍 . 6 2.1 总体设计. 6 2.2 主程序前面板的设计. 7 2.3 主程序的程序框图设计. 8 2.31 子 VI 的打开 9 2.3.2 VI 的链接 . 12 第 3 章 虚拟信号发生器的实现 . 14 31
