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1
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.
Natu
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4
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Vo
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9
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1
,
J
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ar
y
201
8
:
33
–
35
34
s
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d
esi
g
n
ed
to
la
y
li
n
k
s
w
h
ic
h
ar
e
co
s
tl
y
an
d
d
e
v
o
u
r
ti
m
e.
T
o
tack
l
e
ab
o
v
e
is
s
u
e
s
,
t
h
e
p
r
o
p
o
s
ed
m
i
n
e
s
ec
u
r
it
y
o
b
s
e
r
v
in
g
f
r
a
m
e
w
o
r
k
in
li
g
h
t
o
f
r
e
m
o
te
s
e
n
s
o
r
s
y
s
te
m
ca
n
e
n
h
an
ce
t
h
e
le
v
el
o
f
ch
ec
k
i
n
g
g
e
n
er
atio
n
w
e
llb
ein
g
an
d
d
ec
r
ea
s
e
m
is
h
ap
in
t
h
e
m
in
e
[
8
]
.
2.
WO
RK
I
N
G
P
RINC
I
P
L
E
T
h
e
f
r
a
m
e
w
o
r
k
s
tr
u
ctu
r
e
i
s
c
r
ea
ted
u
tili
s
in
g
t
w
o
r
e
m
o
te
s
en
s
o
r
h
u
b
s
,
o
n
e
is
a
s
ett
led
ce
n
tr
e,
an
d
an
o
th
er
i
s
a
p
o
r
tab
le
in
f
o
r
m
a
tio
n
p
r
o
cu
r
e
m
e
n
t
s
en
s
o
r
h
u
b
.
T
h
ese
h
u
b
s
ar
e
u
tili
ze
d
to
s
cr
ee
n
th
e
d
if
f
er
en
t
ec
o
lo
g
ical
p
ar
am
e
ter
s
in
s
id
e
t
h
e
u
n
d
er
g
r
o
u
n
d
co
al
m
in
e.
Fig
u
r
e
1
.
C
o
al
Min
e
Mo
n
i
to
r
in
g
S
y
s
te
m
T
h
e
f
r
a
m
e
w
o
r
k
w
i
ll
b
e
as
a
w
h
ee
led
v
e
h
icle
a
f
ter
t
h
at
d
is
tin
cti
v
e
s
e
n
s
o
r
s
ar
e
j
o
in
ed
.
R
i
g
h
t
o
f
f
t
h
e
b
at,
th
e
co
r
r
esp
o
n
d
en
ce
b
et
w
e
en
t
h
e
b
ase
s
tatio
n
an
d
t
h
e
m
i
n
in
g
ar
ea
i
s
ac
co
m
p
l
is
h
ed
th
r
o
u
g
h
r
e
m
o
te
Z
i
g
B
ee
[
9
]
-
[
1
0
]
in
n
o
v
atio
n
.
T
h
e
f
ir
e
s
en
s
o
r
w
i
ll
h
elp
u
s
to
d
is
ti
n
g
u
i
s
h
an
y
u
p
h
ea
v
al
o
f
t
h
e
f
ir
e
in
th
e
w
o
r
k
in
g
r
an
g
e;
g
as
alar
m
i
s
b
ein
g
m
ad
e
co
n
ce
iv
ab
le
w
it
h
th
e
u
tili
za
ti
o
n
o
f
g
as
s
e
n
s
o
r
.
I
f
th
er
e
i
s
a
te
m
p
er
a
m
e
n
tal
te
m
p
er
atu
r
e
w
h
ich
e
n
d
u
r
es
i
n
th
e
w
o
r
k
r
eg
io
n
,
t
h
en
t
h
e
ac
co
m
p
a
n
y
in
g
ca
n
b
e
r
elate
d
to
th
e
ass
is
tan
ce
o
f
te
m
p
er
atu
r
e
s
e
n
s
o
r
.
I
f
th
er
e
s
h
o
u
ld
ar
is
e
an
o
cc
u
r
r
en
ce
o
f
an
a
v
ala
n
ch
e,
t
h
e
ti
lt
s
en
s
o
r
w
ill
ed
u
ca
te
th
e
f
r
a
m
e
w
o
r
k
.
T
h
e
ac
co
m
p
an
y
i
n
g
d
ata
f
r
o
m
th
e
s
en
s
o
r
s
w
ill
b
e
g
iv
e
n
to
th
e
b
ase
s
tatio
n
s
tr
u
ct
u
r
es,
w
h
ic
h
w
il
l
alar
m
th
e
o
f
f
ice
to
s
en
d
p
r
o
m
p
t
o
f
f
er
as
s
is
ta
n
ce
.
T
h
e
r
o
b
o
t
ca
n
p
o
w
er
f
u
ll
y
d
ec
id
e
th
e
p
o
s
itio
n
o
f
th
e
s
n
a
g
u
tili
zi
n
g
t
h
e
u
ltra
s
o
n
ic
s
e
n
s
o
r
.
Asi
d
e
f
r
o
m
t
h
i
s
t
h
er
e
is
a
c
a
m
co
r
d
er
co
n
n
ec
tio
n
w
h
ich
w
il
l
li
v
e
s
tr
ea
m
th
e
p
ictu
r
es
to
th
e
b
ase
s
tatio
n
.
T
h
e
s
p
ea
k
er
w
i
ll
en
ab
le
u
s
t
o
s
en
d
th
e
cr
i
s
is
s
u
m
m
o
n
s
with
th
e
as
s
is
ta
n
ce
o
f
v
o
ice
m
es
s
ag
e
in
s
tr
u
m
e
n
t.
E
v
er
y
o
n
e
o
f
t
h
e
s
e
m
u
s
t
b
e
co
n
s
t
an
t,
i
n
t
h
i
s
w
a
y
t
h
e
f
r
a
m
e
w
o
r
k
u
tili
ze
s
R
T
OS
f
o
r
th
e
h
a
n
d
li
n
g
o
f
th
e
f
la
g
tr
an
s
m
is
s
io
n
.
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35
3.
RE
SU
L
T
S AN
D
D
I
SCU
SS
I
O
NS
T
h
is
s
tag
e
co
n
tai
n
s
a
p
lan
o
f
s
en
s
o
r
h
u
b
s
w
h
ic
h
ar
e
in
ch
ar
g
e
o
f
th
e
ac
cu
m
u
la
tio
n
o
f
ec
o
lo
g
ical
p
ar
am
eter
s
an
d
s
e
n
d
in
g
t
h
e
g
ath
er
ed
in
f
o
r
m
at
io
n
.
T
esti
n
g
t
h
e
y
ield
o
f
v
ar
io
u
s
s
en
s
o
r
s
will
b
e
co
n
v
e
y
ed
b
y
co
n
s
id
er
in
g
g
as
s
e
n
s
o
r
s
,
te
m
p
er
atu
r
e
an
d
d
am
p
n
e
s
s
s
e
n
s
o
r
s
,
an
d
s
o
o
n
.
T
h
e
eq
u
ip
m
e
n
t
s
tr
u
c
tu
r
e
o
f
th
e
r
e
m
o
te
s
e
n
s
o
r
ar
r
an
g
es
h
u
b
i
s
as
ap
p
ea
r
ed
in
t
h
e
i
n
f
o
r
m
a
tio
n
o
b
tain
i
n
g
m
o
d
u
le
is
u
t
il
ized
f
o
r
d
etec
ti
n
g
,
g
ath
er
i
n
g
d
ata
an
d
ch
an
g
in
g
o
v
er
to
ad
v
an
ce
s
ig
n
s
.
T
h
e
r
e
m
o
te
co
r
r
esp
o
n
d
en
ce
m
o
d
u
l
e
is
ess
en
t
iall
y
i
n
ch
ar
g
e
o
f
s
p
ea
k
i
n
g
w
i
th
d
i
f
f
er
en
t h
u
b
s
.
Fig
u
r
e
3
.
Har
d
w
ar
e
I
m
p
le
m
e
n
tatio
n
o
f
C
o
al
Mi
n
e
Mo
n
i
to
r
in
g
S
y
s
te
m
4.
CO
NCLU
SI
O
N
I
n
t
h
is
ap
p
licatio
n
c
h
ec
k
i
n
g
o
f
t
h
e
u
n
d
er
g
r
o
u
n
d
co
al
m
in
e
f
r
a
m
e
w
o
r
k
in
li
g
h
t
o
f
w
ir
e
d
an
d
also
r
e
m
o
te
s
y
s
te
m
s
o
th
e
cr
itical
is
s
u
e
o
f
co
r
r
esp
o
n
d
en
ce
d
ata
tr
an
s
m
is
s
io
n
,
co
n
s
i
s
te
n
t
o
b
s
er
v
in
g
a
n
d
w
ellb
ei
n
g
h
av
e
b
ee
n
co
m
p
r
e
h
en
d
ed
b
ef
o
r
e
th
e
d
an
g
er
s
h
ap
p
en
.
I
f
t
h
e
r
e
s
h
o
u
ld
ar
is
e
an
o
cc
u
r
r
en
ce
o
f
th
e
d
eb
ac
le,
th
e
f
r
a
m
e
w
o
r
k
w
il
l
f
in
d
th
e
m
i
n
e
w
o
r
k
er
'
s
w
h
ich
ar
e
ca
u
g
h
t
i
n
s
i
d
e
u
n
d
er
g
r
o
u
n
d
co
al
m
i
n
e.
T
h
is
w
il
l
co
m
p
r
eh
e
n
d
th
e
t
i
m
e
ta
k
en
f
o
r
p
r
o
tect
w
o
r
k
s
i
n
ce
it
i
s
co
m
p
u
ter
iz
ed
in
cr
e
m
e
n
t
li
f
e
s
ec
u
r
it
y
o
f
r
esc
u
er
s
an
d
c
o
a
l
ex
ca
v
ato
r
s
.
P
o
r
tal
h
u
b
w
ill
s
p
ea
k
w
i
th
P
C
th
r
o
u
g
h
s
er
ial
co
r
r
esp
o
n
d
en
ce
.
Do
o
r
ce
n
tr
e
is
an
ex
ce
lle
n
t
h
u
b
in
s
en
s
o
r
ar
r
an
g
es
w
h
ich
i
s
in
c
h
ar
g
e
o
f
t
h
e
co
m
m
u
n
icatio
n
a
m
o
n
g
s
t
P
C
an
d
s
e
n
s
o
r
o
r
g
a
n
izes.
I
t
is
ar
r
an
g
ed
clo
s
e
g
r
o
u
n
d
o
b
s
er
v
i
n
g
f
o
cu
s
.
T
h
e
p
r
o
p
o
s
ed
f
r
am
e
w
o
r
k
ca
n
less
e
n
th
e
m
i
s
h
ap
s
a
n
d
p
er
ils
w
h
ic
h
h
ap
p
en
i
n
v
ar
io
u
s
s
o
r
ts
o
f
m
i
n
es.
Natu
r
al
p
ar
a
m
eter
s
lik
e
te
m
p
er
at
u
r
e,
m
u
g
g
i
n
es
s
,
g
as
ca
n
b
e
o
b
s
er
v
ed
an
d
co
n
tr
o
lled
w
it
h
t
h
e
as
s
is
ta
n
ce
o
f
r
e
m
o
te
s
en
s
o
r
s
y
s
te
m
s
.
T
h
is
f
r
a
m
e
wo
r
k
is
n
o
t
s
o
m
u
ch
c
u
m
b
er
s
o
m
e
b
u
t
r
at
h
er
m
o
r
e
ex
ac
t th
a
n
co
n
v
e
n
tio
n
al
w
ir
ed
s
tr
u
ct
u
r
e.
RE
F
E
R
E
NC
E
S
[1
]
He
X
u
e
w
e
n
a
n
d
W
a
n
g
Yu
n
,
“
T
h
e
De
sig
n
o
f
T
u
n
g
ste
n
M
in
e
E
n
v
iro
n
me
n
t
M
o
n
it
o
ri
n
g
S
y
ste
m
b
a
se
d
o
n
W
ire
les
s
S
e
n
so
r
Ne
tw
o
rk
s
”
,
S
e
c
o
n
d
In
tern
a
ti
o
n
a
l
Co
n
f
e
re
n
c
e
o
n
In
telli
g
e
n
t
S
y
ste
m
d
e
sig
n
a
n
d
E
n
g
in
e
e
ri
n
g
A
p
p
li
c
a
ti
o
n
,
2
0
1
2
.
[2
]
L
ih
u
a
Ch
e
n
,
e
t
a
l,
“
De
sig
n
o
f
Co
a
l
M
in
e
T
e
m
p
e
ra
tu
re
M
e
a
su
r
in
g
a
n
d
Co
n
tro
l
li
n
g
S
y
ste
m
Ba
s
e
d
o
n
W
irele
ss
S
e
n
so
r
Ne
tw
o
rk
s
”
,
In
stru
me
n
t
tec
h
n
iq
u
e
a
n
d
S
e
n
s
o
r
,
2
0
0
8
.
[3
]
Zh
a
n
g
Ya
n
b
i
n
g
,
“
De
sig
n
o
f
L
o
w
-
p
o
we
r W
ire
les
s Co
mm
u
n
ica
ti
o
n
S
y
ste
m B
a
se
d
o
n
M
S
P4
3
0
a
n
d
n
RF
2
4
0
1
”
,
2
0
1
0
.
[4
]
Yin
g
li
Zh
u
a
n
d
W
a
n
g
h
u
i
Zen
g
,
“
De
sig
n
o
f
M
o
n
it
o
rin
g
S
y
ste
m
fo
r
Co
a
l
M
in
e
S
a
fety
Ba
se
d
o
n
M
S
P4
3
0
a
n
d
n
RF
9
0
5
”
,
In
tern
a
t
io
n
a
l
Co
n
f
e
re
n
c
e
o
n
In
telli
g
e
n
c
e
S
c
ien
c
e
a
n
d
i
n
f
o
rm
a
ti
o
n
e
n
g
in
e
e
rin
g
,
2
0
1
1
.
[5
]
Ya
n
g
Zh
o
u
a
n
d
Qia
o
d
i
Zh
o
u
,
“
W
ire
les
s tem
p
e
ra
tu
re
&
h
u
mi
d
it
y
m
o
n
it
o
r a
n
d
c
o
n
tr
o
l
S
y
ste
m
”
,
2
0
1
2
.
[6
]
IA
R
S
y
st
e
m
s,
“
M
S
P4
3
0
I
AR
Emb
e
d
d
e
d
W
o
rk
b
e
n
c
h
IDE
Us
e
r
Gu
id
e
fo
r
T
e
x
a
s
In
str
u
me
n
ts
M
S
P4
3
0
M
icr
o
c
o
n
tro
ll
e
r F
a
mily
”
,
2
0
0
4
.
[7
]
M
.
A
.
M
a
n
iv
a
sa
g
a
m
,
T
.
A
n
a
n
th
a
n
,
2
0
1
7
.
A
n
Ef
f
icie
n
t
S
e
lf
-
Re
c
o
n
f
ig
u
ra
ti
o
n
a
n
d
Ro
u
te
S
e
lec
ti
o
n
f
o
r
W
irele
ss
S
e
n
so
r
Ne
tw
o
rk
s,
IJ
M
S
R,
9
(
2
),
p
p
.
1
9
2
-
1
9
9
.
[8
]
A
d
e
e
b
S
a
lh
,
L
u
k
m
a
n
A
u
d
a
h
,
No
r
S
h
a
h
id
a
M
.
S
h
a
h
,
S
h
ip
u
n
A
.
Ha
m
z
a
h
,
2
0
1
7
.
M
a
x
im
izin
g
En
e
rg
y
E
ff
icie
n
c
y
f
o
r
Co
n
su
m
p
ti
o
n
Circu
it
P
o
w
e
r
in
D
o
w
n
li
n
k
M
a
ss
iv
e
M
IM
O
W
irele
s
s
Ne
t
w
o
rk
s
,
In
ter
n
a
ti
o
n
a
l
J
o
u
r
n
a
l
o
f
El
e
c
trica
l
a
n
d
Co
m
p
u
ter
E
n
g
i
n
e
e
rin
g
(
IJ
ECE
)
,
7
(
6
),
p
p
.
2
9
7
7
-
2
9
8
5
.
[9
]
M
u
h
a
m
m
a
d
A
n
wa
r,
A
b
d
u
l
Ha
n
a
n
A
b
d
u
ll
a
h
,
Ka
sh
if
Na
se
e
r
Qu
re
s
h
i,
A
b
d
u
l
Ha
k
e
e
m
M
a
ji
d
,
2
0
1
7
,
W
irele
ss
Bo
d
y
A
re
a
Ne
t
w
o
rk
s
f
o
r
He
a
lt
h
c
a
re
A
p
p
li
c
a
ti
o
n
s:
A
n
Ov
e
rv
ie
w
,
T
EL
KOM
NIKA
(
T
e
lec
o
mm
u
n
ica
ti
o
n
Co
m
p
u
t
i
n
g
El
e
c
tro
n
ics
a
n
d
C
o
n
tro
l)
,
1
5
(3
).
[1
0
]
M
a
rw
a
M
e
k
k
i,
Os
m
a
n
A
b
d
a
ll
a
h
,
2
0
1
7
.
De
v
e
lo
p
m
e
n
t
o
f
a
W
irele
ss
S
e
n
so
rs
Ne
tw
o
rk
f
o
r
G
re
e
n
h
o
u
se
M
o
n
it
o
ri
n
g
a
n
d
Co
n
tr
o
l
,
I
n
d
o
n
e
sia
n
J
o
u
rn
a
l
o
f
El
e
c
trica
l
En
g
in
e
e
rin
g
a
n
d
In
f
o
rm
a
ti
c
s (
IJ
EE
I)
,
5
(3
)
.
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