单片机毕业设计--基于单片机的恒压供水系统设计

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1、摘要 I 摘要 建设节约型社会，合理开发、节约利用和有效保护水资源是一项艰巨任务。 根据高校用水时间集中，用水量变化较大的特点，分析了校园原供水系统存在了 耗能高，可靠性低，水资源浪费严重，管网系统待完善的问题。提出利用自来水 恒压供水和水泵提水相结合的方式，并配以变频器、软启动器、单片机、微泄露 补偿器、压力传感器、液位传感器等不同功能传感器，根据管网的压力，通过变 频器控制水泵的转速，使管网中的压力始终保持在合适的范围。从而解决因楼层 太高而导致压力不足及小流量时能耗大的问题。 另外水泵耗电功率与电机转速的三次方成正比关系， 所以水泵调速运行的节 能效果非常明显，平均耗电量较通常供水方式节

2、省近四成。结合使用可编程控制 器，可实现主泵变频，副泵软启动，具有短路保护、过流保护功能，工作稳定可 靠，大大延长了电机的使用寿命。 关关键字键字：恒压变频供水，单片机，差压供水，自动 ABSTRACT II ABSTRACT Buiding the conservation-oriented society,the reasonable development,saves and the effective protecting water resources is an arduous task,according to the university water used time,the

3、 water consumption change major characteristic,analyzed the campsus original water supply system existence cost to be high,the reliability was low,the water resources waste,the pipe network system treated the consummation the question .Proposed that draws water the way which using the runing water h

4、ydraulic pressure water supply and the water pump unifies,and matches by the inverter,the soft starter,SCM ,Micro reveals the compensator,the pressure transmitter,the fluid position sensor and so on.According to the network management pressure,controls water pumps rotational speed through the invert

5、er,causes in water pipespressure maintains at throughout the appropriate scope,thus may solve the problem which the floor high pressure is too insufficient when small current capacity the energy consumption is big. Moreover the water pump consumes the electric power and the electric machinery ratati

6、onal speed is proportional three cubed the relations,therefore the water pump velocity madulation movements energy conservation effect is obvious,the sverage power consumption usual water supply way saves 40%.The union uses the programmable controller,mayrealize the main pump frequency conversion,the auxiliary pump soft start,has the short circuit protection,the overflow protection,function stably,the work reliable,lengthened electrical machinery greatly. Key words:Constant pressure frequency