多种液体的自动混合装置的plc设计毕业设计论文.doc

毕 业 论 文（设 计） 题目：液体混合系统的PLC控制设计及仿真 （英文）：The Design and Simulation of Liquid Mixing System Based on PLC Control 系 别： 电气工程系 专 业： 自动化 姓 名： 林 静 学 号： 2008601543219 指导教师： 陈 龙 日 期： 2012年5月 液体混合系统的PLC控制设计及仿真 摘要 本次的实验装置选用的主机型号为S7-200CPU224的主机，并在PLC程序设计的基础上结合外围设备形成一个方便工业控制系统的整体。该次设计是以两种液体为例，由液面传感器检测容器中液面的高度，并按顺序加入A和B两种液体，再经过电动机搅拌，最后将液体排除，放空容器，并形成循环。最后，再将PLC中的程序同步到组态王中，进行仿真调试。 文中详细的说明了系统的软件和硬件设计。软件的设计包括了系统控制的指令表、梯形图及工作过程，而硬件设计则包含了混合液体装置的电路框图、输入输出分配表和外部接线。整个程序采用了结构化的设计，具有调试方便，维护简单的优点。 设计利用PLC实现了在混合过程中的精确控制，提高了混合比例的稳定性、运行稳定、自动化程度高，因此具有广阔的市场前景，适合于各种液体的混合调配，现在在工业及工业以外的众多领域发挥越来越大的作用。 关键词：混合装置；自动控制；西门子PLC；组态王 The Design and Simulation of Liquid Mixing System Based on PLC Control ABSTRACT The choice of the experimental setup host model S7-200 series host, peripheral devices and the PLC program design based on the combination form convenient industrial control systems as a whole. The design is based on two liquids, for example, the height of liquid from the liquid level sensor detects the container, according to the order to join the A and B, the two liquids, stirring again after the motor, and finally the liquid out of emptying the container, and the formation of the loop . Finally, PLC then the program is synchronized to the Kingview, simulation debugging. In this paper, a detailed description of the system software and hardware design. The software design includes a system control instruction list, ladder and work processes, and hardware design contains a circuit diagram of the mixed liquid devices, input output allocation table and the external wiring. The entire program uses a structured design, with convenient debugging, maintaining the advantages of easy. Design using PLC to achieve precise control of the mixing process, improve the stability of the mixing ratio, stable operation and high degree of automation, so it has broad market prospects. Suitable for a variety of liquid mixed dep