The Design Of Virtual Lab For Electronic Circuit Based On LabVIEW And Multisim

Experimental teaching is vital for general higher education, which is the key part for cultivating the handling ability, innovating ability and comprehensive quality of the students. The traditional electronic circuit laboratory in some colleges and universities because of the lack and obsolescence of the instrument and equipment and other factors, the effect of the experimental teaching is not good, which affects the cultivation of students’ practical ability. Virtual experimental teachings, as a beneficial supplement to the traditional experimental teaching, not only saved the cost, but also extend the experiment on time and space effectively. Sothe research of electronic circuit virtual laboratory has important theoretical significance and bright application prospect.This thesis mainly studies the construction of a virtual laboratory from three levels:the basic theory, implementation techniques and the application system. A concrete discussion of the basic theories and the key techniques of the virtual experiment is also made in the paper, and based on which the remote electronic circuit of virtual laboratories is established. The main research content is as follows:1.The thesischose the LabVIEW and Multisim as the development platform of the remote virtual laboratory. LabVIEW has powerful functionslike graphiccoding function, external interface function,dataflow-driven mode and network publishing function, and it can accomplish the remote control of virtual laboratory. However, it is unable to simulate the artificial circuit and digital circuit. Multisim, a powerful simulation software, just makes up for this shortage,and is capable of simulating all kinds of artificial circuits and digital circuits.2.According to the B/S software architecture, and integrating the advantages and disadvantages of the LabVIEW and Multisim, using the interface technology take the two together, and combining the WEB technology, the remote virtual laboratory was built. This system adopts modular design, including the user login module, user management module, the virtual experiment module, the experiment report and submit module. This system is easy to operate, and capable for remote logins; Using LabSQL tools realizes the connection and data interaction between the LabVIEW and Database Access.Both the user information and experimental data can be stored in the database, which is convenient for management, and improves the interactivity of the system.3. The thesis developed an amplification circuit of individual transistor with common emitterexperiment, and on this basis, the remote virtual laboratory is tested. In the test, the students can understand the experiment, master the experiment principle and can get reliable experimental data. The result shows that this virtual laboratory is convenient and practical, and could have good experimental results.Overall, this system has some application value, itwill be further expanded in the future, and it is expected to be applied to the experimental teaching of the college.