According to the characteristics of the software system of virtual instrument, the building method of a case library for software system of virtual instrument based on frame is discussed in detail.
根据虚拟仪器软件系统的特点，论述了基于框架的虚拟仪器软件系统的实例表示方法和实例库的建造方法。
Virtual experimental teaching software simulates physical experiment by abstracting kinds of instrument, building virtual scenes and realizing EDA.
虚拟实验教学软件从真实实验中抽象出各种元器件，组建虚拟场景，实现电子设计自动化(EDA)。
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