Research And Implementation Of Virtual Experiment Teaching System Based On LabVIEW

The experiment teaching is very important in higher education for science and engineering colleges.The traditional way of experiment has many defects,for example:the instrument has a large volume and covers a large area,meantime,it needs a lot of money to repair and the experimental equipment and methods can't keep up with the pace of scientific development.At the same time,updating the experimental equipment will spend huge sums of money,low openness,poor learning response and so on.These defects will affect and restrict the development of experimental teaching.The virtual experiment system construction has been carried on the comprehensive analysis of the research respectively from the basic theory,the development environment and the application of classification in which summarizes the historical development and current situation of the virtual teaching experiment system both at home and abroad,as well as a variety of technologies to realize virtual experiment teaching system.I set up the virtual experiment teaching system platform based on graphical programming language Lab VIEW development environment,at the same time,the calculation can improve the running speed of the whole system and the function of the size of extensible modular design?The virtual teaching experiment system consists of two parts:login management module and test management module.To further refine the program in these two modules and debug one by one to succeed,We design the framework of the program combined to form a whole final system of experimental teaching program acting the "dynamic loading VI" as the main technology finally.This paper discusses the theoretical framework and key technologies of virtual experiment teaching system.The system uses Microsoft Access as the database system,and uses SQL technology to exchange and transmit the data of the login management system.The system has been developed and implemented a series of virtual experiments,such as:the design of digital filter,convolution,spectrum analyzer,modulation and demodulation,sampling theorem,experimental design,and combined with the network publishing technology of virtual experiment system.The server and the exchange of information between the client are realized through the Http achieving remote access to the client and the Lab VIEW own Web Service(Network Publishing)technology besides the B/S structure system.