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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
69-21Human Occupancy Detectors
detection area is situated where the hands are normally being placed. Figure 69.20c illustrated the faucet
ha
ving
a li
ght
pi
pe
an
d
th
e
pa
rts
th
at
ar
e
no
rmally
ne
eded
fo
r
di
spensing
wa
ter
. Fi
gure
69.21 sh
ows
a
bl
ock
di
agram
of th
e
wa
ter
o
w
co
ntrol
sy
stem
. e li
ght
pi
pe
ca
n
be a bu
ndle
of th
e
opt
ical
b
ers
or a
so
lid
tr
anslucent
ro
d
mo
lded
of po
lycarbonate
re
sin
. Us
ually,
th
e
em
itted
li
ght
is mo
dulated
by pu
lses
.
i
s
he
lps
to se
parate
th
e
re
ected
li
ght
sig
nals
in
to
a ba
ckground
(a
mbient)
co
mponent
an
d
th
at
co
n-
trolled
by th
e
pu
lsing
LE
D
dr
iver,
sin
ce
th
e
amb
ient
li
ght
is a dc or sl
ow-changing
sig
nal
. No
te
th
at
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Publisher Resources

ISBN: 9781439848913