目 录
1 绪论...........................................................................................................................................................................1
1.1 引言......................................................................................................................................................1
1.2 虚拟仪器及研究课题的国内外发展现状...........................................................................................1
1.3 课题研究的目的意义..........................................................................................................................2
2 虚拟仪器开发平台——LABVIEW........................................................................................................................2
2.1 虚拟仪器的概述..................................................................................................................................2
2.1.1 虚拟仪器的构成
[3]
.....................................................................................................................2
2.1.2 虚拟仪器的历史.......................................................................................................................4
2.2 LabVIEW的概述..................................................................................................................................4
2.2.1 LabVIEW的特点.......................................................................................................................5
2.2.2 LabVIEW的模板......................................................................................................................5
2.3 小结......................................................................................................................................................8
3 系统方案设计...........................................................................................................................................................9
3.1 信号的频域分析..................................................................................................................................9
3.1.1 拉普拉斯变换...........................................................................................................................9
3.1.2 傅里叶变换............................................................................................................................. 11
3.1.3 FFT功率谱密度......................................................................................................................13
3.2 信号的时域分析................................................................................................................................14
3.2.1 卷积.........................................................................................................................................14
3.2.2 互相关.....................................................................................................................................15
3.3 信号滤波............................................................................................................................................17
3.3.1 巴特沃斯滤波器.....................................................................................................................18
3.3.2 贝塞尔滤波器.........................................................................................................................19
3.3.3 IIR滤波器................................................................................................................................20
3.4 小结....................................................................................................................................................22
4 LABVIEW可视化界面的生成..............................................................................................................................22
5 总结与展望.............................................................................................................................................................24
参考文献....................................................................................................................................................................26
致 谢...........................................................................................................................................................................27