基于LabVIEW逐点数字滤波实验设计

Experimental Design of Point-by-Point Digital Filtering Based on LabVIEW

针对MATLAB环境下设计滤波器不便于构建一个虚拟仪器系统的问题,文中采用LabVIEW逐点分析工具设计数字滤波器教学演示与实验系统,实现动态逐点的信号生成与滤波。系统前面板参数可任意设定,滤波过程实时逐点可视。系统采用LabVIEW事件状态机模式实现,具有开放性特点,方便后续实验项目的增减。使用结果表明其有利于学生理解数字滤波的设计与应用过程、理解信号系统实时性需求。

In order to solve the problem that it is not easy to build a virtual instrument system to design filter in MATLAB environment, this paper uses LabVIEW point by point analysis tool to design digital filter teaching demonstration and experimental system to realize dynamic point by point signal generation and filtering. The front panel parameters of the system can be set freely, and the filtering process is dynamically visible. Moreover, based on the LabVIEW’s event state machine mode, this system is convenient for the subsequent increase and decrease of experimental projects. We argue that by using this system, it is easier for students to understand the design and application process of digital filtering, and also real-time requirements of the signal system.