基于LabVIEW虚拟仪器的双通道信号采集与分析系统设计  

The Design of Dual-Channel Signal Acquisition and Analysis System Based on LabVIEW Virtual Instrument

作　　者：王子瑞[1] 孙敬敬[1] 王林[1] 

机构地区：[1]华北电力大学机械工程系,河北保定071003

出　　处：《机电工程技术》2011年第8期42-45,198,共5页Mechanical & Electrical Engineering Technology

摘　　要：介绍了图形化编程语言LabVIEW的特点,基于LabVIEW设计了双通道信号采集与分析系统。系统采用NI USB-9234数据采集卡,运用虚拟仪器及其相关技术进行了信号采集与处理系统的设计。该系统具有双通道数据同时采集、采集数据实时显示、信号时域和频域分析、FFT转换的瀑布图实现、信号模拟仿真等功能。在分析系统功能需求的基础上,详细地介绍了软件的设计和各功能的程序设计思路,并给出了前面板的设计图。最后对系统的可行性进行了实验检验并进行了说明。实验证明所设计系统对振动信号的采集和分析有效可行,能够完成各种测控任务。This paper introduces the graphical programming language LABVIEW,based on the characteristics of the LABVIEW designed dual channel signal acquisition and analysis system.This system adopt NI USB-9234 data collection card,with the virtual instrument and related technology for the signal collecting and processing system.The design of the system of access to data collection and gathering data at that time,the signal time domain and frequency domain analysis,FFT conversion of the waterfall,and also the implementation of the signal for functions simulations.On the basis of analyzing the systems functioning demand,a detailed description of the functional programming and design of the front panel is approached.At last,the possibilities experiments of system is inspected and detailed.Experience has shown that the virtual instrument is a good solution to the efficient implementation of various missions.

关 键 词：LABVIEW 信号采集 统计特征值计算 时域频域分析 瀑布图 模拟仿真 

分 类 号：TP274[自动化与计算机技术—检测技术与自动化装置]