基于LabVIEW的虚拟滤波器的设计

The Design of the Virtual Filter Based on LABVIEW

随着电子测试技术的不断发展,测试技术正向自动化、智能化、数字化和网络化的方向发展。其中数字滤波器作为测试技术的重要工具而被广泛使用在各个领域。本文设计的滤波器以LabVIEW软件为背景,设计一个能对采集数据波形进行相关处理,并实现相应的参数测量。虚拟滤波器主要包括五个模块:模拟信号的产生、波形的处理、信号的测量、波形的存储与回放、滤波后的波形保存。数据处理模块主要实现数字滤波和加窗函数处理两大功能,可以选择不同的滤波器和窗函数以适应不同的情况,参数的不同设置能够使信号频率不断变化。它是一种测试仪器和系统的概念相结合的软件,结合了测试技术和相应的专业知识。本文介绍了在LabVIEW实现虚拟滤波器测试信号的方法。

Along with development of the electronic test technology, test technology develops toward the trend testing positive automation technology, intelligence, digital and network direction.Digital filter technology as an important test tool has been widely used in various fields. The topic is based on the software LabVIEW. Firstly, this paper introduces the LABVIEW virtual instrument and relevant knowledge, make use of virtual instruments development platform, LabVIEW software development system.The design of the filter mainly includes five modules：production simulation signal, waveform processing, the signal measurement, waveform of storage and playback, filter wave of preservation. Date processing module mainly realize digital filtering and windowing to handle two major functions, choosing different filters and window function to adapt to different situations, the different parameters can be set up so that the signal frequency constantly changing. It is a kind of test instruments and the concept of system of combinative software, combined with testing technology and relevant professional knowledge, and introduce in Lab-VIEW virtual filter test signal method.