e?
Vol.2,No.2金洲等：水肥浓度智能感知与精准配比系统研制与试验
93
[28]姜岩,段杰,王茂励,等.基于物联网技术的水肥一体gy,2018(16):279-281.
化智能管理系统[J].现代农业科技,2018(16):[29]PERALTAPENA,ANGELMIGUEL.Fertilizerinjec‐
279-281.tionwithrotaryvanepumpsandelectricalconductivity
JIANGY,DUANJ,WANGM,etal.Intelligentsystemcontrolinmixedsolutionsforfertirrigation[J].Revista
ofwaterandfertilizerbasedoninternetofthingstech‐CienciasTcnicasAgropecuaria,2010,19:ID3.
nology[J].ModernAgriculturalScienceandTechnolo‐
DevelopmentandTestingofIntelligentSensingandPrecision
ProportioningSystemofWaterandFertilizerConcentration
1,41,2,41,41,41,4
JINZhou,ZHANGJunqing,GUOHongyan,HUYimin,CHENXiangyu,
1,43
HUANGHe,WANGHongyan
（1.InstituteofIntelligentMachines,HefeiInstituteofPhysicalScience,ChineseAcademyofSciences,Hefei230031,China;
2.UniversityofScienceandTechnologyofChina,Hefei230026,China;
3.NingxiaAgriculturalIoTEngineeringandTechnologyResearchCenter,Yinchuan750000,China;
4.IntelligentAgricultureEngineeringLaboratoryofAnhuiProvince,Hefei230031,China）
Abstract:Waterandfertilizerintegrationtechnologycaneffectivelyimprovenutrientutilizationefficiency.However,theexist‐
ingwaterandfertilizermachineshavesomeshortcomings,suchashugecost,singlefertilizerinjection,needforcleaningwater
andsoon,whichhinderthedevelopmentofwaterandfertilizerintegrationtechnology.Aimingattheproblemsofpreciseand
low-costcompoundingofcompoundfertilizeratthelocalfarm,thewaterandfertilizerintegratedintelligentirrigationandfertil‐
izationsystemweretakenastheresearchobject.Inthisresearch,newconceptofanintelligentsensingsystemwasproposed,
andaccurateproportioningsystemofwaterandfertilizerconcentrationwasconstructedandimplemented.Firstly,afaston-line
methodofintelligentsensingmodelofwaterandfertilizerwasestablishedbasedonaseriesofconcentrationgradientcom‐
poundfertilizersolutions.Theconductivityvaluesoftheseformulatedsolutionsweretestedbycontactlessconductivitydetec‐
tionelectrodes.Subsequently,thedataanalysisalgorithmswerediscussedandcomparedtofitregressionmodel.Basedonthe
intelligentsensingmodelofwaterandfertilizer,theframeworkstructureofin-situintelligentsensingandaccurateproportion‐
ingsystemofwaterandfertilizerconcentrationwasdesigned,andtheworkingprincipleofthesystemwasalsoexplained.The
systemproposedincludsafirst-levelwaterandfertilizerconcentrationintelligentperceptionmodelbuildingsubsystemanda
second-levelwaterandfertilizeraccurateproportioningsubsystem.Thefirst-levelsubsystemwasdesignedasaportabledevice,
whichmainlyincludedaprecisepumpforquantitativedosing,alarge-rangeonlineconductivitysensor,aplasticbucketandsup‐
portingcontrolandmodelbuildingsoftware.Thesecond-levelsubsystemwasdesignedasadynamicandprecisefertilizerdistri‐
butiondevice.Theeffectivenessofthesystemwasverifiedbythreetypesofwaterintelligentfertilizerapplicationsoasto
guidethein-situwaterandfertilizerconcentrationratio.Thetestingresultsshowedthatthesecond-orderpolynomialfitting
curveunderregularizationconditionswasthebestmodeltoexpresstherelationshipbetweentheconductivityandtheconcentra‐
2
tionofwaterandfertilizer,andthecorrelationcoefficientsRwashigherthan0.999.Combinedwiththeproportionofeachin‐
dexofcompoundfertilizer,theconcentrationofeachindexofcompoundfertilizerthattheusercaresaboutcanbeobtainedac‐
cordingtothismodel.Theresultsofthreetypesofwaterintelligentfertilizerapplicationshowedthattheconductivityofnatural
waterhadaneffectonthewaterandfertilizersystem,andtherelativedeviationwasmorethan0.1.Theonlinewaterandfertiliz‐
erperceptionandratiosystemproposedinthisresearchrealizedtheeliminationoftheinterferenceofthelocalwaterconductivi‐
tyontheaccuracyoftheratioofwaterandfertilizer,andtheaccuratecalculationofcompoundfertilizerwasachievedthrough
modelcalculation.Thissystemhasasimplestructureandaccurateratio,lowcost,andcanbeeasilycombinedwiththeexisting
waterandfertilizerintegratedmachineorartificialfertilizersystem.Thesystemcouldbewidelyusedinfacilityagriculture,or‐
chardcultivationandfieldcashcropcultivation,etal.
Keywords:waterandfertilizerintegration;conductivity;intelligentsensing;precisionproportioning;systemmodeling;polyno‐
mialcurvefitting |
|
