基于VB的电气工程图学在线教学测练考评系统设计

Design of VB-based online teaching test and evaluation system for electrical engineering graphics

针对高职学生电气工程图学练习资源匮乏、纠错不及时、考评区分度低等问题,基于VB研发了一套应用于电气工程图学分层分类教学的集练习、测试和考评为一体的教辅系统。系统包含参照最新国家制图标准所绘制的电气CAD标准图形库模块;具有练习和考试两种模式,较难、中等、简单三种层次和七大测试类型的学生测试模块;具有评分工具、管理员管理和试题库管理三大功能的教师管理模块。系统采用VBA接口技术实现Excel文档、AutoCAD软件等的控制;采用Rnd随机数函数实现随机抽取试题;调用WINRAR对试题库进行管理;使用FTP数据传输接口与服务器进行数据交互。该系统实用性强,应用广泛,任何工科专业的工程图学都可参考使用。

In view of the lack of practice resources,lagging error correction and low distinction degree of evaluation in the electrical engineering graphics for higher vocational students,a teaching assistant system integrating practice,test and evaluation is developed based on VB(visual basic)for the hierarchical classification teaching of electrical engineering graphics.The system consists of a standard drawing library module of electrical CAD drawn according to the latest national drawing standards,a student testing module with two modes of practice and examination,three levels of being difficult,medium and easy,and seven test types,and a teacher management module with three main functions of scoring tool,administrator management and test library management.In the system,the VBA(visual basic for applications)interface technology is used to achieve the control over Excel documents and AutoCAD software,the Rnd random number function is used to extract test questions randomly,the WINRAR is called for the management of test library database,and the FTP(file transfer protocol)data transmission interface is used to implement data interaction between the system and the server.The proposed system is practical,and can be used widely.It can be used in engineering graphics of any engineering majors.