WABCO TAILGUARD - Why Use Tailguard and Not a Camera System; Retrofitting Tailguard: Requirements for the Refuse Collection Vehicle

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TailGUARD™ for refuse collection vehicles
4.2 Why use TailGUARD™ and not a camera system?
Atrstglance,acamerathatprovidesthedriverofarefusecollectionvehiclewithanopticalimageoftheareabehind
thevehiclewouldappeartobesuperiortotheultrasonic-baseddetectionprincipleusedbyTailGUARD™.
Oncloserconsideration,however,TailGUARD™offersdecisivebenets,particularlywhererefusecollectionvehicles
areconcerned:
 Acamerasystemrequiresgoodlightconditions.Adequatelightingisonlyavailableduringdaylighthours,however.
TailGUARD™,ontheotherhand,alwaysfunctionsequallywellwhatevertheconditions:indaylight,atdawnand
dusk,andeveninthedark.
 Withacamerasystem,whilereversingthedrivermustalwayskeepaneyeonboththemonitorwiththedetailed
cameraimageandtherear-viewmirror.Thisdividedattentioncreatesadditionalstress,andcanleadtomistakes
inrecognisingthesituationbehindthevehicle.WithTailGUARD™,aswellasasimpleopticalsignal,thedriveris
alertedbyadditionalacousticwarningsignals.Thisenablesthedrivertovisuallyfocusontherear-viewmirror.
 Withacamerasystem,thedrivermusthimselfidentifyanyrelevantobjectsinthecameraimage.The
TailGUARD™systemautomaticallyrecognisesbothmovingandstationaryobjects.
 TailGUARD™alsodetectsandmeasuresthedistancetoobjectsintheimmediatevicinityoftherearofthevehicle,
andindicatesthedistancesbetweenthem,whichissomethingthatcamera-basedsystemsarenotcapableof.
 Withacamerasystem,thedriverhastoactivelydecidewhentobrakeandthenperformtheaction.TailGUARD™
ontheotherhand,canautonomouslybrakethevehiclewhenitapproachesanobject.
 Whilethecamerasopticsneedtoberegularlycleaned,TailGUARD™doesnotrequireanymaintenance.
4.3 Retrotting TailGUARD™: Requirements for the refuse
collection vehicle
Herearethemostessentialrequirementsthathavetobefullledbythevehicle:
 Suitablelocationsforinstallingtheultrasonicsensors:
• Itcanbeaproblemwithrefusecollectionvehiclestondsuitableinstallationlocationsfortheultrasonicsensors
dependingontheinstalledliftingandtippingsystem.
• Generally,however,atleasttwosensorscanbesuccessfullyinstalledandconguredinsuchawayasto
providesatisfactorymonitoringoftheareabehindthevehicle.
• Inextremecases,however,specialrear-mountedsuperstructuresmaymeanthatitisnotpossibletouse
TailGUARD™formonitoringtheareabehindthevehicle.Incaseofdoubt,itisthereforeadvisabletocheck
theinstallationpossibilitiesbyconductingtestsbeforehandtopinpointsuitablepositionsforthesensors(see
Chapter 7).
 Supplyvoltage:
• Allvehicleswitha24Vsupplyvoltagecanbettedwiththesystem.
• Vehicleswitha12Von-boardelectricsystemcanonlybettedwiththesystemifapermanentsupplyvoltageof
more than 11.5 V is assured.