基于LabVIEW逐点数字滤波实验设计

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

数字滤波一般是对缓存的一组信号进行处理,模糊或弱化了信号的实时性,教学中不利于学生理解实时滤波过程。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,具有开放性的特点,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。

Digital filtering generally processes a set of buffered signals that blur or weaken the real-time nature of the signals. In teaching it may hinder students’ understanding.To solve this problem,this paper designs a digital filter teaching demonstration and experimental system based on LabVIEW point-by-point analysis tool.This system could realize a dynamic and point-by-point signal generation and filtering process. 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 con-venient for the subsequent increase and decrease of experimental projects.