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給花園里的植物澆水是一次骯臟的、濕流混的體驗(yàn)。如果每天都不得不做的話，不用說(shuō)，肯定會(huì)讓人厭煩的。看起來(lái)，這需要某種形式的自動(dòng)化，特別對(duì)于帶有商業(yè)性質(zhì)的大規(guī)模區(qū)域。
大多數(shù)工程師想到要給花園澆水時(shí)，他們拖出水管，把它接到廚房水龍頭上，水濺得到處都是!在一個(gè)商業(yè)情況中，這是一場(chǎng)災(zāi)難。必須當(dāng)心不要澆過(guò)多或過(guò)少的水。澆水時(shí)存在許多問(wèn)題。當(dāng)太陽(yáng)光正強(qiáng)時(shí)，它會(huì)使植物“燃燒”，此時(shí)澆水會(huì)毀壞嬌嫩的花朵，等等。當(dāng)設(shè)計(jì)一個(gè)自動(dòng)澆水系統(tǒng)時(shí)，所有這些因素及其它因素都需要考慮到。
給出的例子檢測(cè)植物根部周?chē)寥赖臐穸取＿@個(gè)數(shù)據(jù)通過(guò)高速計(jì)數(shù)器輸入xooo傳回PC。根據(jù)土壤條件決定要噴灑多少水量。PWM指令用來(lái)設(shè)定閥門(mén)打開(kāi)的程度，及此時(shí)的水速及水壓要多大。這個(gè)澆灌過(guò)程在定時(shí)器T000的定時(shí)段內(nèi)發(fā)生。
閥門(mén)復(fù)位到起始位置可以通過(guò)別的輸出來(lái)做，或者此時(shí)閥門(mén)彈回。因此，不用驅(qū)動(dòng)輸出來(lái)使閥門(mén)復(fù)位(即關(guān)閉)。
Allen-Bradley 142129Power Supply Board,135230
Mitsubishi SH-V400QM
Endress & Hauser Promag 33F, 33FT4F-MD1FD51F21A
Fisher 14B5072X122 Relay Kit, DT4000, DVC5000
Measurex 09436000 Unitec
Measurex 05367900 Clock Calendar W-12V
SEW Eurodrive R27F Gear Reducer, 3.37:1,1/2hp, 1700rpm 575V
Allen-Bradley 1336F-MCB-SP1B Main Co
ntrol Board, 184699 Rev13
ABB CIM-2CH Communication Board, 29098999
Measurex MPU Co
ntroller II 08567407, 05365800, Rev B
Measurex Unigauge Backplane 05401100
Eaton VCP/VCP-W 692C037G01
Foxboro 43AP-FA42N Controller
Sames Kremlin PDM175Air Diaphragm Pump
Fisher Actuator Stem2N131724222
Allen-Bradley 1336-BDB-SP24C Gate Drive,74101-482-63 Rev 18
SEW Eurodrive R27F Gear Reducer, 4.27:1,1/2hp, 1700rpm 575V
ABB RDO86-8B Relay Board, 57770732
Siemens Relcon R15B02-231
Measurex 05404700 Rev B
Allen-Bradley 1395-KP51 Communication 196274,196284
Measurex 09436900 HLAIP (High Level AIP), 05345901
ABB Analog Co
nnection Interface SDCS-IOB-3, 3BSE004086R0001
Stromberg ABB SCGU 3Y1, 57776269 A
Liquid Solids 1022405-PC5
Allen Bradley LogicBoard 117476, 112382
ABB IOD86-TR, 57275707 I/O TRANSCEIVERBOARD, Allen-Bradley3100-I02
ABB 57088648 USART 86-8CH + MEM
Measurex 05352900 Rev E, F/O
Lambda LZS-500-3/COCDIV2 P0904HW Rev C
Fisher 17A7556X022
Bofors H-2-KG
Bofors H-2-KFE
Westinghouse MS3800F Circuit Breaker, 800 amp with HMA38000TM
Thor B200 Dynamic
Measurex 05410000
General Electric 0621L0503
IMO 3242/261 C3EBF-143J Pump
Siemens Relcon R15D02-174A6
Perkin-Elmer FPD Amplifier N610-9094
Measurex 20000401 Qualogy MC-6217B Disk Controller, 806215-21
Eaton Cutler-Hammer Style 657D780G15
Liquid Solids 1022412 PC6
ABB Stromberg DO86-16, 57275758, Allen-Bradley 3100-DO
Allen-Bradley 1440-VST02-01RA, Entek XM-120
Hach Surface Scatter 6 Turbidmeter , 45000-12
Mitutoyo 174-173 Counter KA-12
Fisher Seal and Gasket Assembly 17A7544X022
Measurex 09437800 ICP
Allen-Bradley 1495-K6 Auxiliary Contact, Size 7, Z26640
Berthold SZ5-L3/50/50
Pick Heater Injection Tube 26-13, Grid Size 3.065
Allen-Bradley 1336F-MCB-SP1K
Teledyne ISCO 6712 Auto Sampler, 609004330
Fisher R92SX000072
Allen-Bradley 1336F-MCB-SP1D Main Co
ntrol Board, 184699
Allen-Bradley 1336F-MCB-SP1F Main
Quantity 2 of Cutler-Hammer 508B012G01
Measurex 05423800 Mod Head Backplane W/SX12
Hamon Research-Cottrell MTC-G3 Control, 309233-C1
Siemens Relcon R15C02A185
Thor Main Co
ntrol Board 1700-9999-00124,P&H 79R614D1
ASEA ABB RADSB RK 625 001-CC
Fisher 34B4767X022 Ball Seal, CD7MCVN
Measurex Source Detector 08350400 Rev H
Rosemount 8712DR12N0M4
Siemens Milltro
nics 7MH71450C, 1P7MH7145-0C
Pall HC8314FKS39H
Fisher 12B6716X022
Fisher 12B6714X022
Measurex 05424700 Rev A, Sx12
Dynapar M060892 Encoder, 62-PNEF-1024-AC
Foxboro P0972QM Control
Foxboro P0961FR, CP60
Fisher 1U508046172 6" Type E Seat Ring
Siemens Relcon R15-A02-093A
Measurex 05365900
Quantity 2 of Cutler-Hammer 508B022G01
General Electric 0621L0504
Measurex DOP Discrete , 09436600
Allen-Bradley 117527 Pulse Board, 119736 rev 2
Endress + Hauser Promag 53 53H02-A00B5RA0BACB, 3/8" dia
Allen-Bradley 118450 Fault Driver Board, 117635 Rev 02
IRD Mechanalysis Model 810
Ametek Panalarm 910WB1
Thor 1-5 hp Driver Board 1700-0199-00150, P
Eaton Dynamatic E15-591-8
Eaton Dynamatic 15-591-5
Schroeder 39QCLZ5V
SKF 32318 J2 Tapered
ABB SAFT 170 PAC Pulse 58095133
Simplex Fire Alarm Board 565-770 L
Ingersoll Rand ARO 6661A3, 1" Air
HID PepperL+Fuchs HART Multiplexer HiDMux2700 Mux 2700-A, 472891
Leine & Linde 510016061 Incremental Encoder with ABB Card 57060956
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