WABCO TAILGUARD - Page 24

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Inthiscase,thetwoultrasonicsensorsunderneaththebindeectorsformtheupperdetectionplane,whilethethree
sensorsaremountedunderneaththelifters.Thesearelocatedhereinthedriving-offposition.Allthesensorsare
installedinanuprightposition.
Generallyspeaking,thefollowinginstallationrulesofthumbhaveprovedeffective:
 Theultrasonicsensorsshouldbeinstalledwhereverpossibleattherearendofalltheattachedmechanismsso
thatnopartsofthemprotrudeintothemeasuringareaofthesensors.
 Thebestsolutionhasoftenprovedtobetoinstallasensordirectlyunderneatheachbindeector(assumingthat
theliftingandtippingmechanismisttedwithsuchdeectors).Thislocationisnotalwayssuitable,however.
 Inthecaseofsystemsthatjusthavealoadingposition(i.e.withoutadriving-offposition),itisoftenonlypossibleto
installtwosensorsononemainlevel.
 Ifsensorsareonlyinstalledononemainlevel,theyshouldbemountedwhereverpossibleataheightofbetween
50and90cmabovetheroadsurface.
 Thedistancebetweenthetwo(outer)sensorsonthemainlevelshouldbeatleast1.50metres.
 Inthecaseofsystemswithadriving-offposition,anadditionallevelwithtwotothreefurthersensorscanfrequently
berealised.
 Wheresensorshavebeeninstalledontwoplanes,thebottomedgeofthesensorsonthelowerplaneshouldbeat
least40cmabovetheroadsurface.Otherwise,rampsorcurbswillbemistakenlydetectedasbeingobjectsbehind
thevehiclewhenitdrivesoverthem.
 Inthecaseofaloweradditionallevel,theouter15°sensorsshouldbemountedwithinthetreadsfortherefuse
collectors(ifpresent)sothattheyarenotinthemeasuringarea.
 Thedistancebetweenthetwo(outer)sensorsofaloweradditionallevelshouldbeatleast1.20metres.
 Hereisageneralnoteonthesizeandformofthemeasuringareasoftheultrasonicsensors:Theclub-shaped
measuringareaofanuprightinstalledsensorisapprox.1.20metrewideandapprox.20cmhigh(namelythe
installationheightofthesensor+/-10cm)atadistanceof1metre.
Installation of the ultrasonic sensors