Study On And Implement Of State Monitoring And System Integration For Numerical Control Machine Group Control System

With the fast development of manufacture automation and enterprise informationization, the demands for automatic manufacture information collecting becomes higher and higher. State monitoring system for DNC has become the key technology in realizing manufacture information integration for manufacture enterprises and remote diagnosis for networked manufacture equipments. Since different NC systems have different open standards, and the requirements of different enterprises for field data acquisition and state monitoring are different, the highlight points of the paper will be how to realize a DNC state monitoring system of generality and feasibility and how to integrate a DNC management system.Firstly, the current situation, problems existed and the tendency of the DNC state monitoring system are discussed. Aiming at the specific conditions and requirements, an overall plan for distributed DNC state monitoring which takes Ethernet as the communication platform for integral NC system control and has a four-layer network structure is proposed.The peripheral interface circuit of ECT-40, the intelligent terminal motherboard for DNC, and the characteristics of the micro processor S3C44B0X are introduced in detail. The structure of the information exchange software based on uClinux embedded operating system is analyzed.According to the specific conditions of the field NC system,three data acquisition plan are proposed, respectively one based on OEM, one based on acquisition monitoring equipment and one based on specialty reporting.Data acquisition based on HMI programming package and FOCAS package is done for NC systems like Siemens 840D, FANUC16i/18i and so on which are well open to the users. The data acquisition circuit is designed and relevant data acquisition for general NC machine tools is performed taking advantage of acquisition monitoring equipments. Input display device is employed to realize the special reporting based data acquisition for non-NC systems. Technologies including basic I/O interface, dynamic Web, data storage and efficiency analysis in the equipment manufactural data processing and displaying process are researched, and dynamic manufactural data exchange is implemented under the condition of network isomery.Finally, the structure and functional model of integrated DNC control system are researched, the systematic operating environment is constructed, and the application pattern for integral DNC management system is proposed.