
83-6 Environmental
e output of these sensors can be analog signals or serial digital data. Common sensor technologies
fo
r
in
clinometers
ar
e
ME
MS,
ac
celerometer,
li
quid
ca
pacitive,
el
ectrolytic,
ga
s
bu
bble
in li
quid,
an
d
pe
ndulum
.
83.2.7 Range Finders
For navigation and obstacle avoidance, robots need to detect the distance of objects from them. Range-
nding
se
nsors
ar
e
us
ed
to me
asure
ra
nge
or di
stance
. e
re
ar
e
se
veral
te
chnologies
av
ailable
to ma
ke
su
ch
se
nsors,
na
mely
se
nsors
ba
sed
on in
frared
(I
R)
sig
nals,
ul
trasonic
sig
nals,
an
d
la
sers
be
ams
. e
se
nsor
ha
s
a tr
ansmitter–receiver
pa
ir
. An IR li
ght,
so
und,
or la
ser
be
am
is se
nt
by th
e
tr