基于LabVIEW的虚拟信号发生器的设计与实现

Design and realization of virtual signal generator based on LabVIEW

LabVIEW是美国国家仪器公司开发的图形化编程语言,使用简单、便捷,并提供了丰富的数据采集、处理的库函数。介绍在LabVIEW开发平台下,以数据采集卡为硬件基础,采用虚拟仪器技术,完成信号发生器的设计。系统采用调用动态链接库的方式与数据采集卡进行通信,实现数据的输出,并按照算法进行数据处理。该系统可以产生指定的正弦波、方波、三角波和锯齿波,同时根据需要可以改变信号的频率、幅值等参数,功能稳定,应用灵活。

LabVIEW is a graphical programming language developed by National Instruments.The software is simple to use and convenient which provides a large number of data acquisition and processing library functions.Based on the platform of LabVIEW,the virtual signal generator is designed using virtual instrument technology.It can communicate with hardware by calling DLL,complete data processing according to algorithm and output signals by data acquisition card.This system can generates sine wave,square wave,triangle wave and sawtooth wave.Parameters of this system,such as frequency and amplitude,can be changed.The system is stable and flexible.