恒压供水系统自动控制系统设计
摘要：水是日常生活中我们不可或缺的重要部分，在节水节能已经成为时代需要的现实条件下，我们这个水资源和电源十分短缺的国家，长期以来的在市供水工业生产循环供水等方面一直比较落后，自动化水平较低。主要表现在高峰期供水水的供求量明显低于其需求量，而在用水低峰期水的供求量高于需求量，此时将造成水资源的浪费与匮乏，同时有可能导致用水设备的破坏，因此，对于供水来说开发恒压供水系统具有重要的现实意义。本论文通过分析变频恒压供水的原理及系统的组成结构来进行设计，提出不同的控制方案，通过对比，该论文采用变频器和PLC实现恒压供水的设计，然后用内置PID对系统中的恒压控制系统进行设计。最后对系统的软硬件设计进行了详细的介绍来完事设计。其次恒压供水设计进行数据传输的远程网络巡回监控的系统。它具体讲述了系统的总体设计与软件的实现，并对系统采取的可靠性进行了阐述说明。
本论文的变频恒压供水系统已在国内许多实际的恒压供水控制系统中得到广泛的应用，并取得稳定可靠的运行效果和良好的节能效果。经实践证明该系统具有一定的可靠性和准确性，极大地改善生活供水的质量，并且节省了人力物力，对社会来说具有明显的经济效益。
关键词：变频调速；恒压供水；PLC；
Automatic control system for constant pressure water supply system design
Abstract: water is the indispensable important part in daily life, we, in the era of water saving and energy saving has become the need of the reality conditions, we this is a shortage of water resources and power of the country, for a long time of circulating water in the municipal water supply industry, etc, have been relatively backward, the low level of automation. In the peak of water supply and demand of water supply volume significantly below its demand, in the phase of water resources supply and demand of water quantity is higher than demand, at this time will cause the waste of water resources and the lack of, at the same time may lead to the destruction of water equipment, therefore, development of constant pressure water supply system for water supply has important practical significance. This paper through the analysis of the principle of variable frequency constant pressure water supply system structure for the design of different control schemes is put forward, by contrast, this paper adopts frequency converter and PLC to realize the design of the constant pressure water supply, and then use the built-in PID constant pressure control system to carry on the design of system. Finally, the system software and hardware design has carried on the detailed introduction to the finished design. Secondly, the design of constant pressure water supply for data transmission circuit of the remote network monitoring system. It tells the story of the implementation of the overall design of the system and software, the reliability of the system adopt are explained in this paper.
Variable frequency constant pressure water supply system of this paper is in the domestic many practical constant pressure water supply control system widely used, and obtain stable and reliable running effect and good energy saving effect. Practice has proved that the system has certain reliability and accuracy, and greatly improve the quality of the water supply, and save the resources, has obvious economic benefits for society.
Key words: frequency control of motor speed; Constant pressure water supply; PLC;
目录
1.绪论 6
1.1 恒压供水系统的介绍 6
1.2 恒压供水系统的设计要求 6
1.2.1 水泵的启停 6
1.2.2 水泵启停切换原则 7
1.3 恒压供水系统的工作原理 7
1.3.1恒压供水系统的构成 7
1.3.2恒压供水系统的工作原理 7
1.4 恒压供水系统主要特点及功能 8
2. 恒压供水控制硬件系统的设计 9
2.1 PLC的特点 9
2.2 PLC的硬件系统的介绍 9
2.3 恒压供水控制系统PLC的选择及功能 10
2.4 恒压供水控制系统设计要素 10
2.4.1电动机的保护 10
2.5恒压供水系统功能说明 10
2.5.1变频调速系统工作过程 10
2.5.2 控制功能框图 11
2.6恒压供水系统电路图 12
2.6.1供水系统的主电路图 12
2.6.2 供水系统的控制电路图 12
2.6.3 系统设计的硬件连接图 12
3.恒压供水系统程序的设计 14
3.2供水系统的子程序设计说明 17
3.3 供水系统的中断程序设计说明 18
3.4储存器功能表 18
4.感谢及论文心得体会 18
参考文献 19
参考文献
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