Development of a Generic Distributed Measurement and Control System

• Main Authors: Chih-Huang Chung, 鍾志煌
• Other Authors: Min-Hsiung Hung
• Format: Others
• Language: zh-TW
• Published: 2005
• Online Access: http://ndltd.ncl.edu.tw/handle/72849459623727274621

碩士 === 國防大學中正理工學院 === 電子工程研究所 === 93 === SCADA (Supervisory Control and Data Acquisition) systems possess functions of collecting, filtering and integrating data. They play a vital intermediary role between the equipment layer and the enterprise layer of factory automation. However, existing SCADA systems have some limitations in information integration, data collection, and function generality. Aiming to improve these limitations, this work uses technologies of XML, Web Services, and SoPC (System on a Programmable Chip) to propose a novel SCADA system: GDMCS (Generic Distributed Measurement and Control System). First, we adopt XML to express various information of the system. The remote users then exchange information with the factory site by XML documents. Furthermore, we define a unified DTD file to validate XML documents to facilitate the information integration among different systems and applications. Next, we refer to the EDA standards of semiconductor industry to develop a data acquisition mechanism that allows the remote users to selectively specify desired data items by data collection plans. This can increase the flexibility of retrieving equipment data and reduce the demand of the network bandwidth. Also, the system transmits information through Web Services, which can resolve the problems of information exchange across networks and heterogeneous systems. In addition, the system possesses many generic controllers that are developed based on the SoPC and Soft-IP technologies. Users can easily reconfigure the software and hardware of the generic controller over networks. This increases the function generality of the SCADA system. Finally, we employ GDMCS to construct an intelligent monitoring and control system of a high-power transmitter as an application paradigm and perform related integration tests and performance evaluations. The results validate the effectiveness of GDMCS. Because possessing the properties of generic purpose, high flexibility, and low cost, GDMCS can be applied in diverse applications of factory automation.