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1、宁波大红鹰学院毕业设计（论文）外文翻译所在学院：机电学院班级：09机自6班姓名：赵亚威学号：091280742指导教师：张育斌合作导师：2012年11月15日Therealizationofwirelesssensornetworksandapplicationsinagriculture1IntroductionWirelesssensornetworks(WirelessSensorNetwork,WSN)aredeployedinthemonitoringareabythelargenumberoflow-costmicros
2、ensornodes,wirelesscommunicationthroughtheformationofamulti-hopnetworkself-organization.Theaimistoperceivecollaboration,collectionandprocessingofnetworkcoverageintheperceptionofobjects,andsendobservers."Sensors,sensingobjectandtheobserver,"constitutethethreeelementsoft
3、henetwork.Herethatthesensorisnotinthetraditionalsenseofthesimpleperceptionofphysicalsignalsandthesensorintoadigitalsignal,whichisthesensormodule,dataprocessingmoduleandwirelesscommunicationmoduleintegratedinasmallphysicalunit,thatis,enhancedfeaturesthanmanytraditionals
4、ensorscannotonlybeawareofenvironmentalinformation,butalsodataprocessingandwirelesscommunicationcapabilities.Withthebuilt-insensornodesinavarietyofsensors,wheretheenvironmentcanmeasureheat,infrared,sonar,radarandseismicsignalsandothersignalstodetecttemperature,humidity,
5、noise,lightintensity,pressure,soilcomposition,movingobjectthesize,speedanddirection,andsomanyphysicalphenomenaofinteresttous.Wirelesssensornetworkisanewmodeofinformationacquisitionandinformationprocessing.Becauseoftheshortageofwaterresourcesareataconsiderabledegree,plu
6、s90%ofthewaste,untreatedsewageorhandlingstandardsfordirectdischargeofwaterpollution,waterqualityislowerthan11%ofagriculturalwatersupplystandards.Wateristhelifebloodofagriculture,isthecontrollingelementoftheecologicalenvironment,butitisalsostrategiceconomicresources,ext
7、ractionofgroundwaterbypumpirrigationoffarmland,rationaluseofwaterresources,developmentofwatersupply,improvetheecologicalenvironmentinChinaiscurrentlyaccurateAgriculturekey,souseofirrigationwaterandenergysupplyintoday'sworldisthegeneraltrendoftechnologicaldevelopment.2O
8、verviewofwirelesssensornetworks2.1ThesystemarchitectureofwirelesssensornetworksWirelesssensornetworksystemarchitectur
