摘要信号发生器是实验室和工程中常常要用到的测量仪器。而实验室所用的传统物理仪器存在着很多缺陷,例如体积较大,携带起来不方便,有的价格还比较高,在做实验的时候还特别容易损坏,这些局限性让人们开始考虑部分场合使用虚拟仪器代替传统仪器。73453
本课题设计的虚拟信号发生器系统主要利用LabVIEW 软件,先用LabVIEW软件进行编程,在计算机内产生信号数据,再利用数据采集卡将产生的数据输出,最后接一个放大电路用以实现实际信号的输出。本设计具有的特点是可以根据用户的需要进行波形的选择,幅值、频率等参数的调节。
该论文有图40幅,表2个,参考文献28篇。
毕业论文关键词:虚拟仪器 LabVIEW 信号发生器 数据采集卡 放大电路
The System Design of Virtual Signal Source
Abatract Signal generator is often used as measuring instrument in the Laboratory and engineering。 The traditional physical instruments which are used in our laboratory have many disadvantages 。 Such as, the volume of traditional instruments is large which is unconvenient to carry and the price of them is relatively expensive。 What is worse, they are vulnerable when people do some experiment。 These limitations result in the phenomenon that people began to consider using virtual instruments instead of using traditional instruments。
This project uses a king of software which is called LabVIEW to design a virtual system of signal generator。 Firstly, LabVIEW is used to write program which can generate data of signal in the computer。 Secondly, device of Data Acquisition which can convert digital signal to analog signal is used to output data 。 At last , an amplifying circuit can achieve the actual signal waveform。 Users can adjust parameters , such as the kind of waveform , amplitude , frequency and so on according to their needs。
The paper has 40 figure paintings, 2 tables and 28 references。
Key Words:Virtual Instruments LabVIEW signal generator Data Acquisition amplifying circuit。
目 录
摘要 I
Abatract II
1 绪论 1
1。1 课题研究背景及意义 1
1。3 本设计的主要工作 2
2 虚拟仪器 3
2。1 虚拟仪器的概念 3
2。2 虚拟仪器的构成 3
2。3 虚拟仪器的特点 4
2。4 编程工具LabVIEW 4
3 虚拟信号发生器的软件设计 6
3。1 信号发生器的设计目标 6
3。2 信号发生器的设计框架 6
3。3 前面板的设计 6
3。4 程序框图的设计 10
3。5 波形发生的程序调试 13
3。6 信号输出的软件设计 16
4 系统硬件设计 21
4。1 硬件设计的必要性 21
4。2 硬件设计方案比较 21
4。3信号输出的硬件设计 22
5 总结与展望 28