北京理工大学珠海学院 2020 届本科生毕业设计基于 PLC 的恒压供水系统设计基于 PLC 的恒压供水系统设计摘 要中国的社会经济飞速发展伴随着城市不断的扩张。常驻城市的人口增多,人们的生活水平也日益提高,居民对与民生息息相关的城市供水系统的稳定性,质量、节能,以及数量的要求也日益增高。其中,由于种种的原因,传统的供水系统需要人工控制,造成大量的水资源浪费,同时维护系统也变得困难。因此需要提升系统自动化的控制水平,否则,根本无法满足现有城市、居民楼。以及工厂所需的供水需求。本设计考虑到了中小城市的供水系统的状况,进行对基于 PLC 的调速恒压控制供水系统设计。供水系统的设计是基于 smart200 系列 PLC 来进行的。对于工业供水中,所有的节能的问题,为了解决这一问题,本文提出了基于 PLC 的恒压变频供水的一个方案。由变频器频率以及对输出电压的实时控制,从而改变水泵出水量。在系统设计的部分,介绍了选取软硬件型号,绘制了软件系统的流程图及设计程序梯形图,自动控制供水流程符合供水系统的需求,基本满足日常用水需求,并且提高了生产水平。北京理工大学珠海学院 2020 届本科生毕业设计关键词: PLC;恒压供水;变频器;变频调速;可编程控制器Design of constant pressure water supply system based on PLCAbstractThe rapid development of China's social economy is accompanied by the continuous expansion of the city. The population of residents in cities has increased, and people's living standards have also increased. Residents' demand for stability, quality, energy conservation and quantity of urban water supply systems closely related to people's livelihood has also increased. Among them, due to various reasons, the traditional water supply system needs manual control, resulting in a lot of waste of water resources, and at the same time it becomes difficult to maintain the system. Therefore, it is necessary to improve the control level of system automation, otherwise, it will not be able to meet the needs of existing urban and 北京理工大学珠海学院 2020 届本科生毕业设计residential bui...