LabVIEW自动测试实验系统的设计与实现
毕业论文关键词 自动测试；数字滤波器；LabVIEW；虚拟仪器
Title Design and implementation of an automatic test system Based on LabVIEW
Abstract As the development of the science and technology, People in modern society are in the digital information age. More and more people are paying attention to automatic test technique. Automatic test system is a system which performs automatic test and data processing in the case of using very little manpower and even no manpower, and then produce output results and test results in a special way. Compared with manual test system, Automatic test system saves manpower, material resources and financial resources, and can also improve labor productivity and product quality, which plays an important role in the field of national defense and scientific research. In this paper, I use the LabVIEW platform to program and design a digital filter system and a oscilloscope, to make students in automation conduct experience with waveform processing and spectrum analysis in a convenient way.I use LabVIEW’s strong ability to interface programming, it can simulate the traditional instrument to process a signals by the design of the front panel and program diagram. In this article, the design method of oscilloscope and filter is described and the function of virtual instrument is realized. In this paper, the principle of virtual filter design is using software to analyze and process the data through the acquisition of analog signal data. Finally, the experimental results are shown. Keywords automatic testing; digital filter; LabVIEW; virtual instrument
目次
1绪论.1
1.1引言.1
1.2自动测试系统.1
1.3LabVIEW开发平台4
1.4课题背景.5
2自动测试系统设计7
2.1设计流程.7
2.2总体设计思想.7
2.3RLC无源滤波电路原理7
3示波器的设计与实现.11
3.1设计思路11
3.2方案实现11
4滤波器的设计与实现.14
4.1滤波器简介14
4.2数字滤波器的分类14
4.3在LabVIEW中设计滤波器15
4.4调试过程及结果17
结论.19
致谢.20
参考文献21
1 绪论 1.1 引言 自动测试技术在当今民用生产、国防安全和科技发展等领域应用十分广泛，自动测试技术的发展也为生产力的发展节省了大量的人力物力财力资源。作为一种效率更高而成本更低的技术，自动测试技术正受到越来越多的重视。而随着计算机软件技术的迅猛发展，虚拟仪器技术也被广泛的应用到信号采集、自动测试和仪器测量等领域中，这些都促进并加速了测试系统与测试仪器的设计方法和显示技术的发展。“软件即仪器”已经成为了测试与测量技术发展的一个非常重要的标志。虚拟仪器完全改变了使用传统仪器的方法，开辟一条测控技术发展的新道路。与传统仪器相比，虚拟仪器有许多优势。两者相比如表1。1所示。虚拟仪器相较于传统仪器确实有很大的优势， 但是它并不否定也不能完全取代传统仪器所发挥的作用，它们互相促进互相补充与发展，使仪器技术能够更快更好的发展。在高速度、高带宽以及专业测试等高档测试领域，传统独立仪器具有无可取代的优势。而在中低档测试领域，虚拟仪器凭借其优势可以取代一部分独立仪器的作用，而且在完成复杂困难环境下的自动化测试任务中，虚拟仪器可以发挥其巨大作用，这些是传统的独立仪器很难胜任，甚至不可能完成的工作。