摘 要 随着社会主义市场经济的进展，人们对供水质量和供水系统可靠性的要求不断提高；再加上目前能源紧缺，利用先进的自动化技术、控制技术以与通讯技术 ，设计高性能、高节能、能适应不同领域的恒压供水系统成为必定的趋势本论文分析恒压给水系统的原理和结构，设计不同方案，综合各方面考虑，本论文采纳变频器和 PLC 实现恒压供水和数据传输，然后用数字 PID 对系统中的恒压控制进行设计。最后对系统的软硬件设计进行了详细的介绍。具体讲述了系统的总体设计与软件的实现，并对系统实行的可靠性措施进行了说明。关键词 变频调速，恒压供水，PLCABSTRACTWith therapiddevelopmentofsocialisticmarketingeconomy,thereisagrowingdemandfor better quality of water supply and higher reliability of supply system. In addition ,considering the current common energy crisis, achieving the scheme of automatingthe water supply system. So it is an inevitable tendency to design and create an energy-savingconstant-pressure water supply system of excellent performance with the help of advancedtechniquesof automation,monitor-control system; andcommunication. Meanwhile, theSystem can also adapt to various water Supply regions.This paperanalyzes the structure of VF speedregulatingconstant-pressurewatersupply,andproposesseveralcontrolmethods.Bycarefulstudy and comparison, PLC and inverter's method fits water supply system and datatrans mission very well. Finally the paper shows the design of constant pressure supply watercontroller according to PID data and detailed introduction of its software and hardware.In thispaper,theauthordesignsandrealizestheremotemonitorandcontrolsystemthrough MCGS, and then illustrates its general design, software implement and the measures of preventable disturbance in details. Key wordsVF speed，constant pressure water supply，PLC目 录摘 要 Error: Reference source not found ABSTRACT Error: Reference source not found 1 绪论 1 1.1 城市供水系统的要求 ...
