ngHuang
The
WebGPSvehiclemonitoringsystemdesignedinthisthesiscontains
mainlythreepans:theControlCenter,themobileunitinstalledineachvehicleand
GSMcommunicationnetwork.Itis
a
large—scaleandpublicmonitoringplatform
on
forGPSvehicledynamicinformationbased
Internet,whichcombinesadvanced
GPS、GIS、GSMandInternettechnologies.nleInternet-basedMonitoring
PlatformforGPSVehicleDynamicInformationprovides
an
integratedsolutionfor
vehicleorientation,on—waygoodsfollow-upservice,real—timedispatchingand
informationquery.
As
a
real—timevehiclepositioningandmonitoringsystem,theWebGPS
resolvethecollectionofpositioning
system
must
data
and
the
to
real-timeimprove
trans
missionofthesedatafirstly.Manylocationtechonologiesdesigned
vehiclepositionin
gprecisionandreliability
are
discussedandthedesign
tO
projectofandthe
intergratedGPS/DRnavigationtechnologyischosen.According
therequirement
forreal—timevehicletracing,theestablishingofcommunicationlink—path
deliveringofdatainformationbecomethe
majorproblem
inactualapplication.The
vehiclemonitoringsystemadoptsthetechniqueofmessagecommunicationin
GSMnetwork
to
realizeremotedatadelivering,whichnotonlyresolvesthis
problemwell.butalsohasverylOWcastincommunication.GSMnetworkiSalreadyestablishedeverywhere.Theexpenseofusingshortmessageserviceisloweranditissuitabletotransmitpositioningdata
a
tO
theControlCenterrepeatlyin
shortslot.The“PointtoCenter'’solutioniSadoptedbetweentheControlCenter
¨r
andtheShort
MessageServiceCenter
toreduce
transmissiondelayandincrease
capacityofmonitoringtargetsgreatly.whichisveryimportantin
WebGPSsystem
andhasgoodapplicationmeaning.
TheControlCenter,asthekernelpartofthewhole
WebGPSsystem,employs
therealizationmodeof“Internet+database+vectormap”.Vectormap.whichisproducedthroughscanningoriginChengdumap,digitizingandlabelingusing
Maplnfo,providesbasicdataforimplementingmapapplicaiondevelopment.MapXtremeJava,anewadvancedmapapplication
server
isusedto
matchdisplay
ofGPSpositioningpointstransmittedbyGSMnetworkandrealizevehiclereal—timedispatch
andinformation
queryunderB/S
mode.Wherever
acar
locates,user
CansuperviseitconvenientlyandquicklyviaIntemet.
Tomakefull
use
oftheadvantagesofB/SandC/Smode,mysolutionto
realizethedesignoftheControlCenteriScombinationofBISstructureandC/Sstructure.B/SmodeisusedforbrowsingandenquirythroughbrowsersandC/Smodeismainlyusedfordatamaintenance.Thissystemisincomparablyeasytobe
operated.Users
Call
enter
thesysteminterfacesimplybyopeningIEandinput