煤矿安全监控系统外文翻译Word文档下载推荐.docx
- 文档编号:17793946
- 上传时间:2022-12-10
- 格式:DOCX
- 页数:13
- 大小:36.32KB
煤矿安全监控系统外文翻译Word文档下载推荐.docx
《煤矿安全监控系统外文翻译Word文档下载推荐.docx》由会员分享,可在线阅读,更多相关《煤矿安全监控系统外文翻译Word文档下载推荐.docx(13页珍藏版)》请在冰豆网上搜索。
Engineering
BeijingTechnologyandBusiness
University
Beijing,China
YanChen
KedongWang
Abstract—Thispaperdescribesandimplementsanewtypeofcoalminesafetymonitoringsystem,itisakindofwirelesssensornetworksystembasedonZigBeetechnology.Thesystemconsistsoftwopartsundergroundandsurface.Wirelesssensornetworksareconstitutedbyfixednodes,mobilenodesandagatewayinunderground.PCmonitoringsoftwareisdeployedinthesurface.Thesystemcannotonlygatherreal-timeenvironmentaldataformine,butalsocalculatethereal-timelocationofmobilenodeswornbyminers.
Keywords:
ZigBee;
localization;
wirelesssensornetworks;
coalMine
.RESEARCHSTATUS
Asanimportantenergy,coalplaysapivotalroleintheeconomicdevelopment.Coalminemonitoringsystem,istheimportantguaranteeforcoalminesafetyandhighefficiencyproduction[1].Inordertoensurethesafeoperation,theinstallationofenvironmentmonitoringnodeintunnelstoreal-timedetectionisveryimportant.However,commonlyusedtraditionalmonitoringnodewiredconnectiontoobtaincommunicationwiththecontrolsystem,thisnodeexistwiringdifficulties,expensiveandothershortcomings.Incontrast,wirelesssensornodecanbeeasilywithcurrentminemonitoringnetworkconnection,andgoodcompatibility,facilitateconstitutedminegasmonitoringnetwork,tosuitvarioussizeofmineapplications.Sincewirelessnodesarebatterypowered,socompletelyoutoftheshacklesofthecable,shortentheconstructionperiodcanbearrangedatanytimewheretheneedtouse.
TheZigBeewirelesscommunicationtechnologyisusedinthiscoalmineenvironmentalmonitorsystem.Thisisanewshort-range,lowcomplexity,lowpower,lowdatarate,low-costtwo-waywirelesscommunicationtechnology[2].Now,wirelesssensornetworkproductbasedonZigBeetechnologyarequantityandvariety,buttherealproductcanbeappliedinundergroundenvironmentsofspecialsensornodeisveryfew[3].Thesensornodethatwedesignedinthesystemistrulyabletoapplytoin-wellenvironment,itthroughthewirelesssensornodesecuritycertification.Atthesametime,duetothespecialnatureofthewirelessnetworkisthatitcanspreadthewirelesssignal,wecaneasilylocatestaffforcoalminesafetymonitoringprovidesmoreprotection[4].
.SYSTEMARCHITECTURE
Thissystemisacomprehensivemonitoringsystemwhichiscombinedwithsoftwareandhardware.Hardwarepartincludeswirelessmobilenodesandfixednodeswhichweredeployedintheundergroundtunnel,themainfunctionofthemistocollectcoalmineenvironmentdataandrequireperson’slocation.SoftwarepartreferstothePCmonitoringsoftwarewhichisdesignedinVC++isusedtosummarizeanddisplaythedataofeachnode.Monitoringnodeisdividedintomobilenodesandfixednodes;
theyareusingZigBeeprotocolforwirelesstransmissionofdata.Becausethefixednodeisalsousingwirelessdatatransmissionmethod,soit'
sdeployedintheundergroundroadwaybecomesveryconvenient.Asthemobilenodeiscarriedbytheminer,itmustbeusingwirelesstransmissionmethod.ThisallowstheminetoformatopologyofZigBeewirelesssensornetwork.Thefixednodeinwirelesssensornetworkisrouterdeviceandthemobilenodecarriedbymineristheenddevice.Normally,therouterofZigBeenetworkhasnosensorequipment;
itisonlyresponsiblefordataforwarding.Butconsideringthepracticalapplication,webelievethataddsensordevicesontherouterwillbebetteronmonitoringundergroundcoalmineenvironment.Soinourdesign,therouteralsohasanenvironmentmonitoringfunctionwhichisusuallydesignedinenddevice.
Fixednodewillsentreceiveddatafrommobilenodetothegateway,thenthegatewaytransmitsdatatomonitorcomputerthroughRS232oropticalfiber.ThePCmonitorsoftwareinthecomputerwillprocessalldataanddisplaytheminavisualizationwindow.ThePCsoftwarealsocalculateseachmobilenode’sreal-timelocationthroughthespecificlocalizationalgorithm,accordingtothereceivedsignalstrength(RSSI)obtainedfrommobilenodes.
.NODEDESIGN
SincetheZigBeewirelessnetworkplatformsoldonpresentmarketwasdesignedforthegeneralenvironment,forspecialundergroundsotheyarenotsuitablefortheenvironment.Therefore,weneedtocustomizethesystemforundergroundenvironmentwhitaspecialhardwarecircuit.NodephotoareshowninFig.1
ThenwirelessmicrocontrollerCC2530chipisthecoreprocessorofthenodedevice,itcanconstituteaZigBeenetworkwithveryfewperipheralcircuits.TheCC2530isanIEEE802.15.4complianttrueSystem-on-Chip,supportingtheproprietary802.15.4marketaswellastheZigBee,ZigBeePRO,andZigBeeRF4CEstandards.Unlikeotherwirelesschip,CC2530built-in8051monolithicintegratedcircuitskernel,thereforewenolongerneedtouseasingleMCUtocontrolthecircuit,andthissaveusalotofcost[5].
A.MobileNode
ThemobilenodeistheenddeviceofaZigBeenetworkthatcanbecarriedbyminer;
itshouldbeaportableandlowpowerconsumptionnode.Sothemobilenodewedesignedisonlyassmallasamobilephone,anditisbybuilt-inlithiumionbatterypowersupply.Inpowerloss,thecoreprocessorCC2530isalowpowerconsumptionchip,whenitisinthesleepmode,itonlyneedtouselessthen1uAworkcurrent.Inordertoreducepowerconsumptionasmuchaspossibleonthedisplay,a100*32pixelmatrixwithnobacklightingLCDscreenwasused.Thebattery’scapacityofthemobilenodeis1500mAh,soitisenoughtomeettheminer’slonghourworksintheunderground.ThebatterychargemanagementchipisTP4057,themaximumchargecurrentcanupto500Ma.
Figure1.Nodephoto.
ThemobilenodecircuitincludesthegasconcentrationsensorMJ4.0andtemperaturesensorPT-1000.Asfarasweknow,manywirelesssensorplatformsusethedigitaltypesensor.ThecommunicationbetweenthedigitalsensorandtheMCUneedstricttimingrequirements.Butconsideringtheactualapplication,thewirelessMCUusuallyhasareal-timeoperatingsystemingeneral,ifweusethemicrocomputertosimulatethestricttiming,itwillaffectthereal-timeofwholeoperatingsystem.Thesetwosensorsoutputanalogsignalsnotdigitalsignals.Onlyinputthissignalintoadifferentialamplifier,canwegetanappropriatesignalthatcanbeconvertedtoadigitalsignalbyanADCmodewithintheCC2530chip.Inordertofacilitatethecarrying,externalantennawasnotusedinourmobilenode,insteadofusinga2.4GHzpatchantenna.Andwecustomizeashelllikeacellphonesize;
itisenoughtoputallPCBs,sensorsandbatteryinit.Takingintoaccountthesmallshelloftheexplosiveperformanceisnotverygood,thedesignofPCBsandtheselectionofcomponentareallcarriedoutthesafetyassessment.
B.FixedNode
Fixednodeisinstalledinthewalloftheundergroundtunnel.Becauseitisbigthanthemobilenode,itisnotappropriatetocarryaround.Thecircuitofthefixednodeisalmostsamewiththemobilenode,italsouseaCC2530chipascoreprocessor.Becauseofundergroundtunnelsgenerallydeploywithpowercable,fixednodescanusecablepower-supplymodes.Atthesametime,becauseweusewirelesssignaltransmission,thedeploymentofnewfixednodesbecomeveryconvenient,whichalsoresolvestheproblemofthesignallinesdeployment.
Asafixednode,theminorwhoisdoingworkmayfarfromit,inordertofacilitatetheminersobservedenvironmentaldataaroundthefixednodes,itusesLEDdigitaldisplay.Atthesametime,thelargecurrentLEDlightsandbuzzeraredesignedinthecircuit;
itmakesthefixednodewiththefunctionofsound-lightalarm.Consideringthatitmayoccurtheemergencyofwithoutelectricity,fixednodealsobuilt-inalithium-ionbattery.Undernormalconditions,lithium-ionbatteryisinchargingstatus,whenexternalcabledisconnect,fixednodeisautomaticswitchedtobatterypower,whichcanensurethemobilenodecandelivertheinformationthroughfixednodesinunderground.
Withoutregardingtofixednodes’portability,wehaveacustomizedshellthathasexcellentexplosionproperties,andtheinternalspaceisenoughtoholddownthe2.4GHzantenna.Toensuresafety,allcablesandthelocationofsensorsareplacedwithparticulargluesealed,sothatithasagoodseal.
.POSITIONINGFUNCTION
Oneoftheimportantfunctionsofthewirelesssensornetworksislocalization,especiallyintheundergroundtunnel,itrelatestothesafeoftheminer'
slife.CurrentlymostwidelyusedorientationmethodisGPSsatellitepositioning,itisahighprecision,all-weatherandglobalmultifunctionalsystemwiththefunctionofradionavigation,positioningandtiming.ButtheGPSpositioningmethodisnotsuitablefortheundergroundworkenvironmentofcoalmine,onceyouentertheunderground,itcannotreceivesatellitesignal,thusunabletoachievetargeting[6].Weneedtoconsiderhowtousewirelessnetworktorealizepositioningfunction,meansusingwirelesssignalbetweenthecommunicationsofdevicesforpositioning.Theexistingdistancemeasuringtechnologybetweenthewireless-devicesbasicallyisthefollowingkindsofmethods:
TOA,TDOA,AOAandRSSI.
AbouttheTOAmethod,thedistancebetweenthetwodevicesisdeterminedbytheproductofthespeedo
- 配套讲稿:
如PPT文件的首页显示word图标,表示该PPT已包含配套word讲稿。双击word图标可打开word文档。
- 特殊限制:
部分文档作品中含有的国旗、国徽等图片,仅作为作品整体效果示例展示,禁止商用。设计者仅对作品中独创性部分享有著作权。
- 关 键 词:
- 煤矿安全 监控 系统 外文 翻译