虚拟数字滤波提高红外气体分析系统精度的应用研究  

Research on Improving System Accuracy of Infrared Gas Analyzers Based on Virtual Digital Filters

作　　者：张永怀[1] 杨帮华[2] 刘君华[1] 

机构地区：[1]西安交通大学电气学院,陕西西安710049 [2]西安工程科技学院,陕西西安710048

出　　处：《化工自动化及仪表》2002年第6期61-63,共3页Control and Instruments in Chemical Industry

基　　金：国家自然科学基金项目资助(50077016)

摘　　要：　探讨影响红外气体分析系统精度的主要因素;提出将虚拟仪器软件平台LabWindows/CVI应用于该系统,介绍CVI的典型滤波函数,在此基础上设计数字滤波器,编写相应程序;用基于PC机的数据采集卡及数字滤波器对本系统检测信号进行处理;简化系统硬件设计,缩短开发周期,与传统处理相比可有效消除各种干扰,改善系统的性能。Key factors affecting system accuracy of infrared gas analyzers were discussed in this paper.The idea of applying virtual instrument software platformLabWindows/CVI to this system was presented.Typical filter function of CVI was introduced.Based on this,a digital filter was designed and relevant programs were compiled.Measuring signal of the system was processed using the digital filter and data acquisition block based on PC.The design of system hardware is simplified and developing cycle can be shortened.Many kinds of interferences have been effectively eliminated compared with traditional processing and the performance of system has been improved.

关 键 词：虚拟数字滤波 精度 红外气体分析器 LABWINDOWS/CVI 虚拟滤波器 信号处理 

分 类 号：TH744.41[机械工程—光学工程]