1、 摘 要 -I- 摘 要 传统的信号发生器其功能完全靠硬件实现，功能单一而且用户的购置、维护 费用高。更重要的是，对于传统的信号发生器，其功能一旦确定便不能更改，用 户要想使用新的功能则必须重新购买新的仪器， 传统信号发生器的不足是显而易 见的。虚拟仪器是将仪器技术、计算机技术、总线技术和软件技术紧密的融合在 一起，利用计算机强大的数字处理能力实现仪器的大部分功能，打破了传统仪器 的框架，形成的一种新的仪器模式。本课题完成了“虚拟信号发生器”的理论研 究，在很大程度上解决了传统信号发生器的诸多弊端。本文主要研究虚拟仪器在 信号发生器领域里的软件编程。 本虚拟仪器可完成输出多种信号波形的同时产生
2、 与输出，信号输出频率、幅度等参数实时可调。本文研究的虚拟信号发生器主要 具有如下优点：用户可自由定义其功能；系统功能升级扩充方便快捷、可与电脑 等设备方便的互联。 关键词: 虚拟仪器 , 信号发生器 , 虚拟信号发生器 , LabVIEW 目 录 -II- Abstract The functions of traditional signal generators are carried out solely on hardware, and at the same time the functions of traditional signal generators are single
3、ness and costly for purchasing and maintaining, What is more important is that the functions of traditional signal generators can not be altered once they are fixed. Users must get new ones so long as they want new functions. Thus, the defects of traditional signal generators are obvious. Virtual in
4、strument is formed by the instrument technology, computer technology, bus technology and software technology. Powerful digital processings ability of computer is used to achieve the main functions of instrument. Virtual instrument broke the framework of the traditional instruments, and built a new device model. This dissertation has accomplished the theoretical research, and made up the various shortcomings of traditional signal generators to great degree. This virtual signal generator can ac
