基于虚拟仪器的开放式虚拟实验室系统的研究和实现

Research and implementation of the open virtual lab based on virtual instrument

本文对构建基于虚拟仪器的开放式虚拟实验室系统的设计思想进行了描述,论述了该系统的关键技术,如动态网页技术、数据库技术、多媒体技术和虚拟仪器技术等,选择了适合本系统内容和特点的技术方案。根据系统的整体设计原则,结合虚拟仪器的实验要求,设计了系统的整体框架和功能模块,将系统划分为6个主要模块虚拟仪器技术、LabVIEW、HPVEE、虚拟仪器中心(虚拟仪器实验室)、软件下载和交流园地。系统中根据各个模块的特点分别采用了Dreamweaver、Flash、ASP、数据库和虚拟仪器技术实现了不同模块的功能。本系统大量采用了层叠样式表单(cascadingstylesheets,CSS)技术,使整个站点的HTML文件在风格上保持一致,方便修改和使用;并且采用RemotePanel技术实现了虚拟仪器的网络化;最后以虚拟电压表的设计与实现为例给出了虚拟仪器系统的具体实现方法。

The paper described an idea of building an open virtual lab system based on virtual instrument. Key technologies for this system were discussed, such as ASP, database, multimedia and virtual instrument technology, and the sound technologies were chosen for content and characteristics of the system. According to the principle of design of system as a whole, the entire frame and function models of DES have been designed combining with the teaching requirements of the virtual instrument. The system has been divided into six models： virtual instrument, LabVIEW, HP VEE, virtual instrument Lab, software downloads and interchange field. The Dreamweaver, Flash, ASP, database and virtual instrument technology have been applied in this system based on the characteristics of the respective models. The CSS technology has been mass used in this system in order to keep identical in style of the HTML Documents of the entire net station and to make the revision and application convenient. Appling the Remote Panel to realize the net of the virtual instrument. Finally, the realization method of the virtual instrument system has been proposed, by using the design and realization of the virtual multi-meter and virtual oscillograph as examples.