小區(qū)恒壓供水系統(tǒng)論(存儲(chǔ)版)
【正文】 automatic control technology and munication technology, the design of high performance, low energy consumption, widely applied in the constant pressure water supply system bee inevitable trend. In view of the application of constant pressure water supply system, the structure of all kinds of constant pressure water supply system are analyzed, explained the acquisition, control principle of the pressure, based on single chip microputer is given pressure acquisition channel connection diagram.Key words: Constant pressure water supply system。變頻恒壓供水系統(tǒng)由變頻器、水泵、PLC以及壓力變送器等構(gòu)成閉環(huán)。通過DI數(shù)據(jù)輸入端，可以輕易的實(shí)現(xiàn)通道功能的選擇。使線圈失電只需將單片機(jī)的引腳置為低電平，光電耦合器驅(qū)動(dòng)繼電器原理圖如圖3所示。如果標(biāo)志符Flag為0，則也再判斷設(shè)定的壓力是否小于一臺(tái)水泵運(yùn)行時(shí)在供水出口產(chǎn)生的最大水
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