两种液体混合设计.doc

武汉理工大学
毕业设计(论文)
课题名称: 两种液体混合的设计
系别机电工程
专业机电一体化
班级机电一体化13
姓名云伟
学号 0**********
指导教师叶俊
2008-10-14
两种液体混合设计
设计人:云伟
摘要:多种液体自动混合是工业中经常遇到的一个工艺流程。它一般要求多种液体在不同时刻向容器中注入不同的量。液体向容器中注入的量可以采用液体传感器SL1、SL2、SL3,进行控制。即当某种液体向容器中注入,到达SL3时停止注入该液体。关闭YV1,然后注入另一种液体。到达液位SL1时停止。上述过程的控制如果采用传统的手动控制液体流量的话,肯定是会产生误差的,其误差会导致整个混合的报废。这在工业生产中肯定是不能允许的。
随着微处理器技术的发展,可编程序控制器得到了迅速的发展,其技术和产品日趋完善。它不仅以良好的性能特点满足了工业生产控制的广泛需要,而且将通信技术和信息处理技术融为一体,使得其功能日趋完善化。伴随着计算机网络的发展,可编程控制器作为自动化控制网络和国际通用网络的重要组成部分,将在工业及工业以外的众多领域发挥越来越大的作用。此外,应用PLC技术实现各种规定的工序动作,可以简化控制线路,节省成本,提高生产率。在工业生产中多种液体混合是工业中常通到的一个工艺流程,在此,将对两种液体的混合实际案例行分析,以充分的说明了PLC控制技术的重要性,以及多处优点。
关键词:可编程序控制器液体混合 PLC 发展趋势液位传感器
Abstract: Automatic multiple liquid mixture is frequently encountered by the industry in a process. It generally require a variety of liquids at different times to different containers and injection quantity. To inject liquid in the containers can be used in liquid sensor SL1 and SL2, SL3, control. That is, when some liquid into the container, arrived SL3 to halt the liquid injection. Close YV1 and then injected into another kind of liquid. Reach Level SL1 a halt. If the above process control using traditional manual control liquid flow, certainly will produce error, the error will cause the entire mixed scrapped. This in industrial production in the affirmative should not be allowed.
Along with the development of microprocessor technology, programmable controller for fast development of its technology and products are maturing. It is not only good to meet the performance characteristics of a wide range of industrial production control needs, but will deal munications technology and information technology integration, increasingly makes its functions perfect. Along with the development works, as a programmable controller automation works and the general work an important part in the industry and industrial many areas outside the play an increasing role. In addition, the application of various provisions of PLC technology processes