基于PLC的混凝土搅拌站控制及监控程序设计.doc

洛阳理工学院毕业设计(论文) I 基于 PLC 的混凝土搅拌站控制及监控程序设计摘要随着我国经济建设的飞速发展,许多大型的基础工程及建筑工程相继开工。建设优质的工程需要高品质的混凝土,而且随着人们环保意识的加强,为了减少城市噪音和污染,交通和建筑管理部门要求施工用的混凝土集中生产和管理。这样,不仅要求混凝土的配料精度高,而且要求生产速度快,因此,混凝土生产过程中搅拌设备自动控制系统日益受到人们的重视。可编程控制器具有可靠性高、功能完善、编程简单且直观,能够有效地弥补继电器控制系统的缺陷。基于上述原因,我设计了基于的商品混凝土搅拌设备自动控制系统。常见的混凝土搅拌站控制方式有继电器直接控制、 PL C和计算机结合以及 PL C 和配料控制器结合 3 种控制方式。采用 PLC 和配料控制器结合控制的搅拌站性能可靠、性价比高,可以保证混凝土的质量,提高混凝土生产效率。作为混凝土搅拌站的核心,控制及监控程序在计量精确、控制可靠、管理方便等方面的要求也日益提高。本文针对 PLC 和配料控制器结合控制的搅拌站来设计其控制及监控程序设计中主要要完成的任务有系统构造、 PLC 的 I/O 分配、工作流程图及 PLC 程序的编写。关键词: 混凝土搅拌站; I/O 分配;可编程控制器( PLC );自动控制洛阳理工学院毕业设计(论文) II The designing of the controlling and monitoring program for concrete mixing stations which based on PLC ABSTRACT With the rapid development of China's economic construction, the basis for many large engineering and construction projects have been started. Construction of high quality project needs high-quality concrete, and with the strengthening of environmental consciousness, in order to reduce urban noise and pollution, traffic and construction management department for the construction of concrete used in concentration of production and management. This requires not only the ingredients of concrete, high precision, and require the production speed, therefore, the production process of concrete mixing equipment automatic control system has attracted attention. Programmable controller with high reliability, functional, simple and intuitive program can effectively make up for the relay control system defects. For these reasons, I designed the product based automatic control system of concrete mixing equipment. Common control of concrete mixing station has direct control of relays, PLC puter and PLC integration bination of ingredients controller 3 control. Batching Controller using PLC and the control of mixing with reliable, cost-effective, can guarantee the quality of concrete to improve concrete production efficiency. As the core of concrete mixing station, control and monitoring procedures in the measur