| The development of information technology and modern educational technology influences greatly on the method of education. Many kinds of virtual experiment systems emerge in order to improve teaching quality. The design method of virtual teaching experiment system (VTES) at present makes the system lack in flexibility and expansibility. Using the method of object-oriented analysis and design in building VTES based on virtual apparatus model, which can greatly improve those disadvantages.Virtual apparatus (VA) is an important part of VTES and can be divided into atomic VA and combined VA according to the structure characteristic. The mathematics models for the above two kinds of VA is established based on discrete event system specification theory. The independency between control and data can enhance the reuse degree of the model. The VTES, according to its structure, is divided into controller, controller management, interface display, VA library, circuit fault diagnosis, simulation results analysis and system help, seven modules in all. The signal in system is transmitted by the undirected graph which is abstracted from experiment circuit diagram. The appropriate system simulation strategy designed makes the system work effectively.Implement the Interactive and Virtual Microcomputer Principle and Interfacing Technique Experimental Platform in C++, MFC and MVC design pattern. The data structure of VA, class library of VETS, circuitry link arithmetic and signal transmission arithmetic are concretely implemented. The system functions is analyzed and tested using the effective simulation experiment. The results show that the system can meet the requirements of experimenters very well, and virtual experiment teaching method can partly or completely replace the traditional teaching method. |
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