Research On Ready-Mixed Concrete Station Management Decision And Control System

With the development of the computer technology, automatic detection and sensor technology, automatic control and ICT technology; visibility, accuracy and intelligence of measurement, and the reliability of control has become the development tendency of the concrete mixing plant. With the growing popularity of computer technology management, computer management of the concrete factory will penetrate into every process, such as production management, equipment management, raw materials management, cost accounting management, and so on. Improving and researching the overall level of management and the construction of the concrete industry is of great significance on the promotion of concrete mixing station management decision and control system.The concrete mixing station management decision and control system consist of lower computer PLC and upper computer. PLC controller is lower computer, it is the core of the whole control system. And it is responsible for receiving signals and outputing control signals. The upper computer can be IPC. And it also can be ordinary PC instead. It completes the management system and the control interface of the control system with WinCC configuration software. The system is divided into management subsystems and control subsystems by function. Information of the management decision-making system is a standard of concrete production enterprises. Therefore, better improve the productivity of the enterprises is a more rational planning management subsystems is to design.A whole deign is made by the needs analysis of the management subsystem. The subsystem is divided into system management, inventory management, production management, vehicle management, laboratory management, and other functional modules. The detailed design is based on the Delphi7.0 and Paradox6.0 to programe. To minimize the total fee of the raw material, a math model of the raw material of the inventory management module is made. Optimization is made by adaptive genetic algorithm. Forecast minimum inventory and the optimal inventory levels, to achieve the optimal inventory control. The upper computer of the control subsystem use Wincc configuration software, which is produced by Siemens, to record and monitor the real-time data, so that a dynamic operation process picture which reflect the concrete production process. The design of the lower computer used the Siemens S7-200 series PLC and the STEP7 programming software, to design the control procedures of the PLC, so that under the batching system, the request batching, weighing, filling and mixing process can be done automatically. Though the OPC we can carry out the communication of the PLC and WinCC, to form a mixed type of industrial control system. Debugging control subsystem is developed because of the inconvenient debug environment. We developed a simulation system by MCU to test the actual system. And it shortened the development cycle of the system.Practice results show that the implementation of management decision-making subsystem enable enterprises use computer management from the productionbill issued to the delivery of concrete. Through the forecast of the optimal inventory and the smallest inventory of the inventory management modules, it enabled the enterprise to increase efficiency and reduce costs. The lower computer PLC of control subsystem operates reliable, matching a group of control and monitoring system of animation, dynamic display of the entire mixing process. Simulation System out of field realized the entire process of mixing station simulation. The combination of supervise, control and manage enabled the ready-mixed concrete station management decision and control system realize the system control integration, and information sharing. It provides a reference for similar industrial control systems. It has a universal significance in the development of industrial control system.