【摘要】 以PC机和数据采集板 (PC—DAQ)为基本硬件 ,采用通用软件编程是当前应用型虚拟仪器 (VI)开发的一种主要形式。文章论述了VI的软硬件构成以及开发虚拟仪器的技术要点 ,并以作者开发的PC—DAQ工程信号分析虚拟仪器VI2 0 0 2为例 ,介绍了虚拟仪器的界面 ,VXD无丢点数据采集 ,环形内存动态显示 ,ActiveX控件 ,屏幕分辨率自适应控制等关键技术更多还原

【Abstract】 Virtual Instrument(VI),which is based on the hardware PC-DAQ(Data Acquisition Quantizer) and general software,is a main type of applied VI development. The configuration of hardware and software that compose VI,and the important techniques of VI development are presented.Citing an example of PC-DAQ Virtual Instrument -VI2002 exploited by the author,the key techniques such as VI interface,signal acquisition without losing data by means of VXD, cycle memory pool for dynamic display, ActiveX controllers, self-adaptive screen resolution optimization and so on are introduced.更多还原