摘要因为计算机时代的到来，仪器行业发生了一场巨变。传统仪器和虚拟仪器产生了激烈的碰撞。虚拟仪器利用了现代计算机科技的资源，将测量和计算机组合在一起，形成了一种新的架构。它的硬件成本低，功能全面，所以应用起来十分方便，推广起来也十分迅速。78201
本设计用USB数据采集卡和电脑两个硬件来开发，还有软件LabVIEW2014，尝试了一个数字采集虚拟示波器设计。它首先是由LabVIEW发送控制信号，然后经过DAC数模转换产生信号源，加入控制对象中，来影响ADC的采集信号，随后传输到虚拟仪器显示面板并显示。
最后再将采集到的波形与实际的示波器采集到的信号和MATLAB仿真得到的信号做个比较。完成以上步骤，来验证此设计的合理性。
毕业论文关键词：虚拟仪器 USB数据采集 数字采集虚拟示波器 信号源
The Design Of Digital Acquisition Virtual Oscilloscope Abstract Because of the arrival of the age of the computer, instrument industry was undergoing a big change。Traditional instruments and virtual instruments produced the fierce collision。Virtual instrument made use of the modern computer science and technology resources，it made the combination of measurement and computer，and then it formed a kind of new architecture。Due to the low cost，the characteristics of easy to use and so on，it has been widely used。
This design with the USB data acquisition card and the computer to develop in hardware。In the aspect of software,it uses LABVIEW to develop。Based on the above,I try to design a system of digital acquisition virtual oscilloscope。It is sending the contral signal by LABVIEW,and then use DAC to produce the signal source。The signal source can add to the contral object to affect the ADC to acquisition signal。Afterwards,the digital signal transferred to the virtual instrument panel and it can be displayed。
At last,we can collect waveform,and then take it to compare with the actual oscilloscope collected signals and the MATLAB simulation。Finish these steps to verify the rationality of the design。
Key words: virtual instrument USB data acquisition digital acuquisition virtual oscilloscope the signal source
目录
摘 要 I
Abstract II
目 录………Ⅲ
1 绪 论 1
1。1 课题研究目的和意义 1
1。2 虚拟仪器概述 2
1。4 课题的主要工作 4
2 数字采集硬件电路设计 5
2。1 外部硬件电路设计 6
2。2 信号调理 8
2。3 A/D 转换控制电路 9
2。4 触发同步设计 10
2。5 本章小结 11
3 软件简介及设计 12
3。1 LabVIEW 概述 12
3。2 LabVIEW 的特点 12
3。3 LabVIEW 的编程环境 13
3。4 软件程序主要结构介绍 14
3。5 虚拟示波器的软件设计原则 15
3。6 虚拟示波器的软件结构 LabVIEW数字采集虚拟示波系统设计:http://www.youerw.com/zidonghua/lunwen_90065.html