基于虚拟仪器的在线实验系统研究
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摘要
利用现有的校园网,构建网络化、分布式的在线测试系统,可以让学生在任何时候,从任何地点访问实验室,从而大大提高实验教学的伸缩性和适应性。基于虚拟仪器的在线实验系统是利用虚拟仪器技术和互联网技术的远程实验平台。
整个实验系统基于C/S模式,由客户端,实验管理服务器,互联网,实验单元和实验仪器单元五部分组成,整个平台具有良好的可扩展性,安全性,允许多用户,多实验同时进行。
在线实验系统使用虚拟仪器技术,以LabVIEW为主要编程语言,实现了“软件就是仪器”的功能。基于数据采集卡,通过编程实现了数字示波器、信号发生器、可控直流电源等传统仪器的功能。利用现有的网络设备,由服务器端完成数据采集和发送,客户端实现数据分析处理,实现了在线测试。目前在线实验系统已经开发模拟电子电路测试,数字电子电路测试和远程控制等电子工程学科的相关实验,所有实验都基于真实物理设备。该平台尽量提供与本地实验具有相同的实验效果,具有一定的开放性和先进性。该系统完成了在局域网,教育网及公众网内多用户多实验的测试,达到了网络在线实验的要求,为网络的实验室建设提供了实例。
System can allow students at any time, from any place to visit laboratories, thus greatly improving the teaching of flexibility and adaptability. The Virtual Instrument-based Online Experiment System is a Remote Platform using Virtual Instrument Technology and Internet technology. The system based on the Client/Service (C/S) model consisting of five units such as the client station, internet, laboratorial manage server, experiment unit and instrumentation unit, it has good expandability, and security, allowing multi-user, multi experiments simultaneously.
The Virtual Instrument Technology is used in the online experimental system, and LabVIEW is chose as the main programming language to realize the "software is the instrument" function. The functions of the traditional instruments such as the digital oscilloscope, the signal generator and the D.C power are realized by Data Acquisition card and designed by software. The data acquirement and transmission are achieved by the server in the system. The data processing is carried out by the client, and the online testing is fulfilled. The experiments for the major in electronic engineering such as analog electronic circuit tests, digital electronic circuit testing, remote control test have been developed in the online system. The system to provide the same experiment with the experimental results is open and advantage. Multi-user and multi-experiment testing is finished in LAN, education website and public website, and the requests of the online experiment are attained, which provides a typical example for the network lab establishment.
整个实验系统基于C/S模式,由客户端,实验管理服务器,互联网,实验单元和实验仪器单元五部分组成,整个平台具有良好的可扩展性,安全性,允许多用户,多实验同时进行。
在线实验系统使用虚拟仪器技术,以LabVIEW为主要编程语言,实现了“软件就是仪器”的功能。基于数据采集卡,通过编程实现了数字示波器、信号发生器、可控直流电源等传统仪器的功能。利用现有的网络设备,由服务器端完成数据采集和发送,客户端实现数据分析处理,实现了在线测试。目前在线实验系统已经开发模拟电子电路测试,数字电子电路测试和远程控制等电子工程学科的相关实验,所有实验都基于真实物理设备。该平台尽量提供与本地实验具有相同的实验效果,具有一定的开放性和先进性。该系统完成了在局域网,教育网及公众网内多用户多实验的测试,达到了网络在线实验的要求,为网络的实验室建设提供了实例。
System can allow students at any time, from any place to visit laboratories, thus greatly improving the teaching of flexibility and adaptability. The Virtual Instrument-based Online Experiment System is a Remote Platform using Virtual Instrument Technology and Internet technology. The system based on the Client/Service (C/S) model consisting of five units such as the client station, internet, laboratorial manage server, experiment unit and instrumentation unit, it has good expandability, and security, allowing multi-user, multi experiments simultaneously.
The Virtual Instrument Technology is used in the online experimental system, and LabVIEW is chose as the main programming language to realize the "software is the instrument" function. The functions of the traditional instruments such as the digital oscilloscope, the signal generator and the D.C power are realized by Data Acquisition card and designed by software. The data acquirement and transmission are achieved by the server in the system. The data processing is carried out by the client, and the online testing is fulfilled. The experiments for the major in electronic engineering such as analog electronic circuit tests, digital electronic circuit testing, remote control test have been developed in the online system. The system to provide the same experiment with the experimental results is open and advantage. Multi-user and multi-experiment testing is finished in LAN, education website and public website, and the requests of the online experiment are attained, which provides a typical example for the network lab establishment.
引文
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[21] Moros R, Luft F, Papp H. Virtual laboratory course in chemical engineering and unit operations (VIPRATECH)-tutorials, simulations and remote process control.in: 2002. 1442: 1447-1448
[22] Pniower J C, Ruane M, Goldberg B B, Unlu M S. Web-based educational experiments.in: Cahrlotte, NC, United States: American Society for EngineeringEducation, Washington, DC 20036, United States, 1999. 5709-5717
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