Design And Realization For Mixed Cement Materials Proportioning Control System

With the acceleration of the national infrastructure and the rapid development of the computer industry, the development of concrete mixing plant proportioning control system has played a pivotal role in improving the accuracy of batching control and production efficiency.The process of the concrete mixing plant ingredients and the composition of control system have been introduced firstly in this paper, then measurement system and control system which is decisive in batching precision are highlighted.Secondly, on the basis of analyzing many factors that affect the batching accuracy and consolidating the characteristics of concrete batching control method, then through lots of experience in engineering practice,using the major method of coarse and fine mechanical control which is based on the percentage of automatic correction closed in advance the amount of the adjustment, combining with the auxiliary comprehensive batching control method of batch compensation and jog ingredients compensation and excess buckle, many other factors which affect the batching accuracy have been overcome, and the accuracy of proportioning control is ensured, then the balance between proportioning control accuracy and ingredients speed have been realized.According to the technological requirements of concrete batching system, the automation system integrated with the function of detection, control and management was developed. The entire system used the instrument and secondary computer controlled the instrument to complete the accused signal acquisition and local display. Mitsubishi FX series PLC was used in the level of basic automation to complete the batching control, coordination control of the raw material warehouse, raw materials scales, the start-stop of conveyer belt, blender, aggregate shock machine and powder broken arch machine; Taiwan Advantech industrial control machine was used in the level of monitoring, including the function of parameter monitoring, data management, production and vehicle scheduling, material management, alerting, tabulation as well as the control parameter settings.The whole design of user interface is vivid and friendly. With the vivid logo display, the operator can monitor the processes and equipment of the production process directly, which is simple and clear, easy to operate and maintain.The main results of the work of this article:combined with years of concrete batching control system development and project implementation experience. it focused on the system design and the development of economy and practicability, both significantly improved the control precision and productivity of the ingredients, and realized the low cost automation of whole system. It promoted the development of automation in concrete batching industry, and provided the advanced equipment and successful experience in the implementation of the automation in concrete mixing station.