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PAPIR – A NEW APPROACH T O CY DETECTIO N
OCCUPANCY RichardThornton, capabi ties of the latest Passive Infrared sensors (PIR) and how t ey are f ci
Richard Thornton, Managing Director of Panasonic ElectricWo capabilities of the l test Passive
and how
nagingDirector of Panasonic Electric Works UK explores the advanced ared sensors (
targe allow
get are rea tobemuchmore owing slightmov
WorksUKexplores the advance d owthey are facilitating lighting control
ng l ght ng cont ol re sensitive ve so ovement
detection.An
example of a typical applicationcouldbe the sensormountedina toilet cubicle todetect
occupancy.The standard the entry
rddetectionring detects
ovement.The same scenariowouldapply to detectionof anoccupiedbed. The standard
slightmovement detectionarea detects the presence of the occupant evenwithveryvery little mov
mov ovement to andfro reathingmov
slightmovement detectionarea candetect the slight bre
rddetectionringdetects the romthe bedwhile the re
ove
sensing are appro
overage vements of the occupie r
thatwouldnormallynot be detected. The ‘Hammerhead’ PIRhas a rectangular rea,with88s
roximately a4:1 rat
better cov rage cov
basic requirement for building automation originates in the fact that there is a need to identify the presence of people in the controlled areas. The solution to this problem is to use some form of occupancy sensor to detect the presence of people in an area. Theoccupancysensor type
A pemostwidelyuse
thebuildingautomationindustrystryisthePIR (Pa
Passive electro spe
mov owev ot h ow
pectruminwhichra ove
roblematicwhencompareparedtotheusual miniaturisationof
Howeve pro
ofotherelectro structure ro ri sedin
veInfrarerared)sensor.PIRmotionsensorsuse romagneticra
radiationint elowinfrarerared radiationemittedbyhuman
vement isidentifiedusingaPIRdetector. verminiaturisationof R ev
ofPI devicescanproveoverov roniccontroldev
Many of theseproblems arise due to the re andcharacteristics of the sensor
device sincePIRmotiondetectors use thermal sensors todetect the small temperature incre
ra exposedto ra rcesare
detection/eliminationof any returning light sourc
lens arrayneededfor the focus and re
reincre
tothenecessary theov
necessitytopro thelow
owe
large pow
gerpro roj
overaverall size Of equal imp ort crc
westquiescent curre re
reasinglydifficult tomanufacture ry tolera .
rancelimits, thesmaller rtanceis the
roducecontrolro ircuits that take rentspossible.
utilisedinastandbymodeis very smallbut ifa oject is consideredthecumulative kenbysomehundre
Obviouslyonanindividualbasis thepower very
ow ower take reds (or ev even thousands)ofdevices canbeveryverysignificant. 12 SPR 12 SPRIING 201 2017 | ENERG MANAGEMEN ENERGY MANAGEMENT ke re re
reasepresentwhenthe sensor element is radiation. Inaddition, the required
re evices. the deve
For yearsPanasonicR&Dhas investiga velopingbui
ve
lding automationmarkets gated
andset intoplace adesigncriteria thathas seenanumber ofminiature pro
roducts successfully
developed.Ago example–thePaPIRsensor–combines miniaturisationwithpra
ra ge cov ro
re self-containedPIR good
ractical specifications
that allows awholehost ofnewapplications. The company’sPaPIRsensor range overs detectiondistances from2mthro andbeyo move
genera ral areamov
internalbuildingcon ro De incorridorsmayreq re
oo
ge re
ralare ew
repeatedslightmov sheltereteredaccommod checkare
ec ft
owe vers relessdet
oftendifficultenv werversionsallow
ff kenfro
trol.Detectionofmov
whilstoccupationofaroommaycall fo genera
pushthesensorto fferre anof pow wire ra
draintake
oorwaysfo off
fora roughto 12m
yondwithversions todetect slight body vements, focusedspot areas andge
ovement.This is to cov
re uirealongdistanceversion ro
reatype.Newapplications suchas ove
reasindoorway forcountingpurposes offe reliabledetectionwithin nvirovironment.Specialultra-lowra ow owlonglifeuseinre ote
vementdetectionwithina odationenvironvronmentorspot po
po fe h powepowersourc rce. remot te
FournewPaPI productshave beenreleased byPanasonic inord
etectionsystsystemswithminimalcurre romt e ow R ro
complement the existing ra ge re generalmov ove
rder to expandand range:
The ‘Saturn’ PIR- This unithas a lens that has twodifferent
detectionareas.Anouter ring offers ge
rangement andthis allows the ow vement detectionwitha
48segment ring that gives standarddetection
sensitivities.The inner ringhas 36segments in a denser arra ge
Panasonic Electric Works UK
www.panasonic-electric-works.com/uk
www.panasonic-electric-works.com/uk T: 01908 231555
/ ENERGYMANAGEMENT ENERGY MANAGEMENT rent ot
over awide area of ove vers
vement Figure 1: Figure 1:
Panasonic’s new range of PaP R products
anasonic’s new range of PaPIR products
io. This allow egments, in
a standardlens. Theuse of cov andsplitmasks ext
sensor inspecific applications.
The ‘LenslessPinhole’ PIRdoesnot use a specific lens but ra cov
rather uses thenatura overage
achieve ina very
detectionov
of the lens a very flath ra
contact ismadewithin roughthe are ral are rea
ge of the sensor tobeutilisedto achieve over small range
ve
ge.Due to the absence eadarea canbe
vedmaking the sensor ideal formounting ry confinedspace orwhere dire
themounting fra rect
re rame.A
typical applicationmaybe touse the sensor in adoor frame to identify any occupantmoving thro
limitedto appro
rea. The detectiondistance is roximately2mhowev
course is usually gre so the sensor canre
ove a cert ever this of
reater thana doorfrarframe and relia blydetectmovement .
The ‘Pet Immunity’ PIRhas aninternal lens mask that canallow abov
owdetectionofmove ov rtainheight but avo below owthis leve vement voidanydetection
vel.This canbe veryusefulwhen
detectionbypets but a owing re detectionofhumanoccupancy.
ge m ve
usedindomestic applications tohelpavoid llow
reliable
As canbe seenmanynewversions of the successful PaPIRsensor range are continually being developedor i proved.While thehigh demandforhighre PIRS exists there
reliability, self-contained, re is plenty of scope to continu e
product andcontinue t topushthe technical b
expectations andnew
omeet customers’ oundaries of the
ewrequirements. re ows amuch
overage of corridors, office areas and ge of specific areas thanis possiblewith overingmasks
xtends theusefulness of the
ry andleaving of anoccupantwhile the re
PAPIR – A NEW APPROACH TO OCCUPANCY DETECTION
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