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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
66-1
66.1 Doppler Measurements
66.1.1 Ultrasound Doppler
e ultrasound Doppler measurements [1,2] are based on a principle discovered by the Austrian
physicist Christian Doppler in 1842 [3], who theoretically predicted that a wave backscattered from a
mo
ving
ob
ject
wi
ll
be sh
ied
in fr
equency
. e pr
inciple
wa
s
ve
ried
by tw
o
ho
rnblowers,
on
e
ab
oard
a
mo
ving
t
rain
a
nd
t
he
o
ther
s
tanding
s
till,
w
ith
t
he
a
bility
to a
ssess
t
he
p
itch
o
f
t
he
s
ound
.
To ob
tain
a Do
ppler
si
gnal
fr
om
a fl
uid,
th
e
fl
uid
mu
st
co
ntain
sc
attering
pa
rticles,
wh
ich
in th
e
ca
se
of bl
ood
ar
e
th
e
bl
ood
ce
lls
. Th
e
si
ze
of a re
d
bl
ood
ce
ll
is ab
out
2 × 7 μm, wh
ich
me
ans
th
at
th
e
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Publisher Resources

ISBN: 9781439848913