The Design of Multi-Tier Internet Computer Assisted Instruction System Constructed by the Serial Communication Technology Theory and Practice

Abstract

In order to promote the goal of web-based education, this paper proposes a multi-tier Internet computer-assisted instruction(CAI) system with distributed computing ability, focusing on serial communication technology course of electronics and electrical engineering. There are twelve units in this research: PLC start/stop unit, PLC state unit, Barcode Reader control unit, temperature sensor module unit, gas sensor module control unit, AC-9002 weighting indicator control unit, RI-5100 weighting indicator control unit, I-7012 analog input module control unit, I-7021 analog output control unit, I-7060 digital input/output control module unit, distributed control unit. The proposed multi-tier Internet CAI system provides the following functions: multimedia interactive teaching, real-time serial communication control practice, animation simulation, random simulated examination, score figuring and weakness analysis, online database maintaining. The multimedia interactive teaching contains theory teaching, example explaining, hardware control module design explaining, serial communication control program teaching, random simulated examination, score figuring, and weakness analysis. It aims at guiding students to build up theoretical concepts. In order to improve the learners’ motivation and learning efficiency on the application of abstract concept, this system provides the interactive learning interface designed by multimedia content and integrates the course contents of theory and practice. The learners can integrate theory and practice by implementing the relative units. This research is constructed by distributed computing multi-tier network architecture, TCP/IP communication technology, DCOM technology, ActiveX component, and SQL database design, which provide Internet learners to learn serial communication control technology course. In addition, the purpose is to make the system more friendly and interactive.