Research And Realization Of Universal Data Acquisition Terminal For MES

Universal data acquisition terminal is the key equipment to collect the fundamental information from MES. Collecting the basis information of the workshop effectively and duly and realizing the real-time data processing is the precondition to make the management automation, information and intelligence. Three kinds of communications techniques and a variety of data acquisition methods are integrated in this terminal. The application framework of this terminal is flexible. Besides these advantages, this terminal can achieve convenience of installation and maintenance, low prices and high universality. Universal and highly integrated data acquisition terminal is one of the key technologies in MES system. Therefore, the subject of this dissertation is of great significance in both theoretic and practice.The dissertation researches and develops the data collection terminal of MES is based on two projects. One of the projects is "Technology-RFID Application Demonstration bases (national demonstration bases)" which is located in the Engineering Training Center of Guangdong University. The other is "The Guangzhou City's project-sub-band" which research platform is sub-frequency RFID in the manufacturing product life cycle management and the application of standard platform. This paper takes the data acquisition terminal as object and the main contents are as follows:(1) Analyzing the manufacturing product life cycle management process deeply and giving the solutions for specific questions.(2) Using the real-time operating systemμC/OS-Ⅱas the data acquisition terminal's software platform.(3) Researching many key technologies of communication, not only migrate an embedded TCP/IP protocol stack, but also propose a bus-based communications protocol-Competition Polling protocol.(4) Against the characteristics of the manufacturing, a new model of data acquisition is designed to further accelerate the applications of the system in different enterprise.This paper not only has been studied the key technology of the system, but also optimizes and realizes the system from the perspective of an application. At present, the paper's research results have been applied to many manufacturing enterprises in Guangdong Province, and have achieved satisfactory results. So this system has a greater economic value and prospects.