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Measurement, Instrumentation, and Sensors Handbook, Second Edition, 2nd Edition
book

Measurement, Instrumentation, and Sensors Handbook, Second Edition, 2nd Edition

by John G. Webster, Halit Eren
February 2014
Intermediate to advanced content levelIntermediate to advanced
1921 pages
82h 13m
English
CRC Press
Content preview from Measurement, Instrumentation, and Sensors Handbook, Second Edition, 2nd Edition
69-1
69.1 Introduction
September 11 has changed the way people think about the airport, aviation, and security in gen-
eral. The threat is expanding interest in more reliable systems to detect presence of people within
th
e
pr
otected
pe
rimeters
. Al
l
se
nsors
th
at
re
spond
to a hu
man
bo
dy
ar
e
di
vided
on th
e
oc
cupancy
an
d
mo
tion
de
tectors
. Th
e
oc
cupancy
de
tectors
de
tect
th
e
pr
esence
of pe
ople
(a
nd
so
metimes
an
i-
mals)
in a mo
nitored
ar
ea
. Th
e
mo
tion detectors
re
spond
on
ly
to mo
ving
ob
jects
. A di
stinction
be
tween
th
e
tw
o
is th
at
th
e
oc
cupancy
de
tectors
pr
oduce
si
gnals
wh
enever
an ob
ject
is st
ationary
or no
t,
wh
ile
th
e
mo
tion
de
tectors
ar
e
se
lective
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Publisher Resources

ISBN: 9781439848913