資源描述：
《趙亞威畢業(yè)設(shè)計(jì)(論文)外文翻譯.doc》由會(huì)員上傳分享，免費(fèi)在線閱讀，更多相關(guān)內(nèi)容在行業(yè)資料-天天文庫。
1、寧波大紅鷹學(xué)院畢業(yè)設(shè)計(jì)（論文）外文翻譯所在學(xué)院：機(jī)電學(xué)院班級(jí)：09機(jī)自6班姓名：趙亞威學(xué)號(hào)：091280742指導(dǎo)教師：張育斌合作導(dǎo)師：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
