混凝土搅拌机系统.docxVIP

PAGE 9 摘要 随着我国经济的快速发展，国家的建筑建设工程在逐步壮大。在建筑建设工程中，往往会伴随着对环境的破坏和污染，其中城市噪音污染更是影响着人们的日常起居生活。随着人们环保意识的增强，为了减少城市噪音污染，国家和建筑工程管理部门对施工时用的混凝土及混凝土搅拌机都有了相关管理与规定。因此，混凝土在搅拌过程中，其能否自动控制，能否有各种防护措施，成为了人们日益关注的焦点。 经过长时间的尝试与研究，的混凝土搅拌机控制方式有很多，其中常用的有继电器直接控制控制方式、PLC为主控单元控制方式两种。经过比较，采用PLC为主控单元的控制方式，其搅拌机性能可靠、性价比高，能够保证混凝土的质量，提高混凝土生产效率同时噪音小，可减少城市噪音，能够弥补继电器控制系统的缺陷。因此，本文研究了基于PLC的混凝土搅拌机系统。本系统采用三菱FX2N系列PLC作为主控单元，采用HL-F（1）型方悬臂梁压力传感器作为称重传感器，对原料舱内的原料进行称重，并与设定值比较，当满足设定时，全部投入搅拌机进行搅拌。当系统发生故障时，会有报警系统报警，提醒工作人员进行检查和修复。 本系统实现了混凝土搅拌过程的自动化控制，运行安全可靠。在21世纪的今天，可编程逻辑控制器PLC的使用已十分成熟，它使用方便，易于操作，研究基于PLC混凝土搅拌机系统有着重大的现实意义。 关键字：PLC；混凝土搅拌机；自动控制；压力传感器 Abstract With the rapid development of Chinas economy, the countrys construction projects in the gradually expanding. In construction projects, often accompanied by damage to the environment and pollution, including urban noise pollution is affecting peoples daily living life. As peoples awareness of environmental protection, in order to reduce urban noise pollution, the state and construction management of the construction of concrete and concrete mixers have the relevant management and regulations. Therefore, the concrete in the mixing process, whether it can automatically control, whether a variety of protective measures, has become a growing focus of attention. After a long time to try and research, there are many concrete mixer control, which commonly used relay direct control control, PLC control unit for the two main control unit. After comparison, using PLC as the control unit of the control mode, the mixer performance and reliable, cost-effective, to ensure the quality of concrete, improve the efficiency of concrete production at the same time noise, can reduce urban noise, can compensate for relay control system defects. Therefore, this paper studies the concrete mixer system based on PLC. This system uses the Mitsubishi FX2N series PLC as the main control unit, uses the HL-F (1) type square cantilever beam pressure sensor as the load cell, weighs the raw materia