摘要当今时代,汽车在生活中的地位越来越重要,随着汽车的普及,汽车的故障诊断及其修理也成了人们关注的问题。汽车的性能在不断提高,电控系统越来越复杂,这就在无形中加大了诊断电控系统故障的难度。由于可以精确地诊断汽车的故障位置,汽车存储示波器渐渐成为了越来越重要的汽车故障诊断仪器。随着虚拟仪器的的概念被提出,仪器制造领域开始掀起一阵革命,而LabVIEW是基于图形化语言的虚拟仪器的设计软件,作为现代电子测量仪器的一种发展趋势,虚拟仪器有着很多传统仪器无法比拟的优势。本论文即采用LabVIEW来实现对汽车数字存储示波器的研究与设计,并且阐述了设计的思路和编程方法。46038 毕业论文关键词:虚拟仪器;LabVIEW;示波器;汽车
ABSTRACT
The present era, the car position in life more important issue as the popularity of cars, car fault diagnosis and repair has become a concern. The car's performance is getting better, the attendant, the electronic control system is more complex, but also increased the electronic control system failure diagnosis difficult. Since it is possible to accurately diagnose the fault location of the car, car storage oscilloscope becoming an increasingly important automotive fault diagnostic instrument. With the concept of virtual instrumentation is presented, instrument-making field began to set off a revolution, and is based on LabVIEW Virtual Instruments graphical language software design as a development trend of modern electronic measuring instruments, virtual instrument has a lot of traditional instruments can not be match advantage. In this paper, which uses LabVIEW to achieve automotive digital storage oscilloscope research and design, and describes the programming methods and design ideas.
Key words:virtual instrument; LabVIEW; oscilloscope; Cars
目录
第一章绪论.1
1.1课题背景和意义.1
1.2虚拟仪器的概念及其优势.1
1.3虚拟示波器的功能及未来发展趋势.2
1.4课题主要研究工作及难点.3
第二章波形分析算法的研究与分析.4
2.1傅立叶变换.4
2.2小波分析.4
2.3傅立叶变换和小波变换分析的比较.5
2.4基于傅立叶变换和小波分析在汽车示波器中的应用.5
第三章汽车示波器与故障诊断.7
3.1汽车检测与故障诊断的常用方法.7
3.2示波器在汽车发动机故障诊断中的应用.8
3.3波型分析法在发动机故障诊断中的应用.10
第四章虚拟汽车示波器的软件设计14
4.1方案设计.14
4.2界面设计.14
4.3程序设计与实现.17
第五章结论与展望25
结束语26
致谢27
参考文献28