一种基于声卡的虚拟示波器的设计  

A Design of the Virtual Oscilloscope Based on the Sound Card

作　　者：李明[1] 杨其锋[1] 

机构地区：[1]河南机电高等专科学校,河南新乡453002

出　　处：《科技通报》2013年第4期155-157,共3页Bulletin of Science and Technology

摘　　要：利用LabVIEW8.5中的数字声音记录节点,编程实现了基于声卡的虚拟单踪数字存储示波器,采样速率为44.1 kHz,下限频率可以做到20 Hz,弥补了一般示波器下限频率过高的不足,同时给出了详细的软件设计过程。与普通示波器相比虚拟示波器具有数据采集、波形显示、参数测量、波形存储等多种功能。虚拟技术的应用缩短了测量系统开发周期,提高仪器的智能化水平,本文为虚拟示波器的实现提供重要参考。In this paper,we use digital sound recording node of LabVIEW8.5 to achieve a sound card based virtual single-track digital storage oscilloscope,which has the sample rate of 44.1KHz,the lower limit frequency of 20Hz,and make up for drawback of too high lower limit frequency of the the general oscilloscope.At the same time we gives the details of the software design process.Compared with ordinary oscilloscope virtual oscilloscope has the function of data acquisition,waveform display,parameter measurement,waveform storage.The application of virtual technology has shorten the development cycle of measuring system and improve the intelligence level of the instrument。This article provides an important reference for the realization of virtual oscilloscope.

关 键 词：虚拟示波器 虚拟仪器 声卡数据采集 LABVIEW 

分 类 号：TP319[自动化与计算机技术—计算机软件与理论]