摘要:随着科技的快速发展,我们已经生活在一个数字化的时代,数字信号处理技术的水平也在不断地提高。但是由于外界的干扰,很多产品试验参数依然会受到各种噪声信号的影响,针对这种情况,我们在对参数进行分析之前一定要进行消噪处理,这样才能保证产品的质量可靠性。目前我们最常用的消噪手段就是硬件滤波这种方式,但这个手段面临着硬件器件体积大,投资成本增加的问题。随着大规模集成电路和电子信息技术的发展,当前工业设计中可以使用计算机软件实现消噪。美国NI公司出品的LabVIEW软件集成了功能非常强大的数字滤波器模块,消噪即可以通过该模块的简单编程进行实现,通过软件消噪可以节省硬件成本。很显然,通过LabVIEW进行滤波对产品的参数信号去噪具有十分重要的作用。所以本设计的主要目的就是在LabVIEW软件环境中对数字滤波器进行仿真设计,从而分析所设计的数字滤波器能否对含噪信号进行有效的滤波处理。91332
毕业论文关键词:LabVIEW,数字滤波器,FIR,IIR,虚拟仪器
Abstract:With the rapid development of technology, we have lived in a digital age。 The level of digital processing technology has also been rising。However, due to various interference, many product test parameters will still be affected by the noise signal, so we must be carried out before the analysis of the parameters of noise reduction, so as to ensure the quality and reliability of product。 The most commonly used noise reduction means is hardware filtering, but the problem is that the hardware device is bulky and increases the investment cost。 With the development of large scale integrated circuits and electronic information technology, the current industrial design can use computer software to achieve noise reduction。 NI LabVIEW software company integrates a powerful digital filter module, the noise can be achieved through the simple programming of the module, through software de-noising can save hardware costs。 Obviously, through the LabVIEW filter and then the product parameters of signal denoising is of great significance。 Therefore, the main purpose of this design is to simulate the digital filter in the LabVIEW ,so as to analyze whether the designed digital filter can effectively filter the noisy signal。
Keywords: LabVIEW,digital filter,FIR,IIR,virtual instrumentation
目 录
1 绪论 4
1。1 课题研究的背景和意义 4
1。2 本文主要工作 4
2 虚拟仪器介绍 4
2。1 虚拟仪器简介 4
2。2 LabVIEW简介 5
2。3 使用LabVIEW设计滤波器的优点 5
3 数字滤波器介绍 6
3。1 数字滤波器的基本概念 6
3。2 数字滤波器的类型 6
3。3 IIR数字滤波器设计原理 7
3。4 IIR数字滤波器设计方法 8
3。5 FIR数字滤波器设计原理