Design Of Remote Electronic Virtual Laboratory Based On LabVIEW And PSpice

Teaching experiment is a course in colleges and universities designed to cultivate students' practical ability and innovative ability.It is not only a review and a test of classroom knowledge,but also an extension of students' extracurricular learning ability.Therefore,experimental course plays an indispensable role in college curriculum learning.Experiments in different universities are very different in terms of popularity due to the cost restriction of traditional laboratories.At the same time,the limitation of time and space in the experiment process makes it difficult to meet the expected standard.The use of development and experiment platform of virtual instrument technology can not only make experimental teaching free from the bondage of time and space,but also control experimental costs effectively.In this paper,the remote electronic virtual experiment system based on LabVIEW and PSpice is designed by using B/S(Browser/ Server)structure system.The construction of virtual laboratory is respectively realized through theoretical research,framework construction and technology realization.The main research contents include the following aspects:1.A virtual platform is built by the combination of LabVIEW and PSpice.LabVIEW has powerful graphics display function and data transfer function,and it can also publish interface of project task byremote control.As an excellent simulation software,there is no doubt for Pspice's simulation capability of the circuit.By combining the external interface of LabVIEW with PSpice,a virtual experimental platform for electronic circuit simulation can just be built on the combined advantages of them.2.Combined with the interface of LabVIEW linked to Pspice,the connection between LabVIEW and MySQL database is realized by the LabSQL tool.The data table in the MySQL database is designed,including user login module,information management module,virtual experiment module,experimental result review module and experimental result query module.The whole system design is divided into multiple modules based on B/S,the modules are connected by data flow driver,ensuring that the virtual to run properly.3.Experiments of analog circuit,digital circuit and circuit theory are designed.Each experiment includes four experimental projects,and the Single transistor amplifier circuit experiment and Chua's chaotic circuit experiment in the analog circuit,the Schmidt trigger experiment in the digital circuit and the second-order RLC series circuit zero-state response experiment in circuit theory are used as examples for remote testing respectively.The test results show that the virtual laboratory can run normally on the PC Port,and can be accessed and operated through remote web pages,and that the result is good.4.Two different methods of virtual experiment system transplantation,app-type and installer-type,are presented in this paper,so the system can be run on the target computer in the form of executable application program or run after being installed on the target computer in the form of software installation,enhancing the practicability of the system.