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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
22-26 Electrical Variables
In the second step, an RF power P
RF
is fed to the sensor; the power increase must be compensated
by a dc po
wer
de
crease,
wh
ich
is pe
rformed
by lo
wering
th
e
br
idge
dc su
pply
vo
ltage
E; in th
is
ca
se,
le
tI
be eq
ual
to I
2
.
Si
nce
th
e
po
wer
di
ssipated
in th
e
se
nsor
ha
s
be
en
ma
intained
co
nstant
in bo
th
st
eps,
th
e
po
wer
P
RF
ca
n
b
e
e
valuated
a
s
P
R
I I
RF
=
( )
4
1
2
2
2
(2
2
.64
)
e
ma
nual bolometer with substitution method
(F
igure
22.31
)
co
nsists
of tw
o
se
quential
st
eps;
in th
e
r
st,
bo
th
RF po
wer
(P
RF
) and dc power (P
dc
) are present, and the power (P
d
) necessary to lead the bridge
to t
he
e
quilibrium
i
s
P P P
d dc RF
= +
(22.65)
Durin
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Publisher Resources

ISBN: 9781439848913