TELKOM
NIKA
, Vol.13, No
.3, Septembe
r 2015, pp. 7
52~758
ISSN: 1693-6
930,
accredited
A
by DIKTI, De
cree No: 58/DIK
T
I/Kep/2013
DOI
:
10.12928/TELKOMNIKA.v13i3.1973
752
Re
cei
v
ed Ap
ril 5, 2015; Re
vised July 1
1
, 2015; Accept
ed Jul
y
20, 2
015
An Intelligent Supplementary Lighting System for the
Strawberry Greenhouse
Zhiliang Kang, Lijia Xu*,
Fei Xiao
Coll
eg
e of Mechan
ical a
nd El
ectrical En
gin
e
e
rin
g
, Sichu
an
Agricult
ure Un
i
v
ersit
y
, Ya’
an,
Chin
a
*Corres
p
o
ndi
n
g
author, e-ma
i
l
: lijia
xu1
3
@1
6
3
.com
A
b
st
r
a
ct
An intelligent
supp
lem
e
ntary
lighting system
fo
r a strawberry greenhouse
is developed in this
study usin
g the embe
dd
ed c
ontrol
l
er
S3C
6
410 as cor
e
. This system d
e
t
e
cts the temp
e
r
ature an
d lig
ht
ing
infor
m
ati
on of the straw
berry green
ho
use w
i
th the temper
ature sens
or
D
S
18B2
0
an
d the li
ghtin
g sen
s
or
2DU6. It store
s
, displays, a
n
a
ly
z
e
s, an
d pr
ocesses th
e collect
ed i
n
for
m
ation w
i
th S3C
641
0 an
d tran
sfers
the control c
o
mma
nds to ST
C89C
52 thro
u
gh APC2
20-
43
.
T
hus, it reali
z
es temperatur
e regu
latio
n
of
the
straw
berry gre
enh
ous
e a
nd
i
n
telli
ge
nt su
ppl
ementary
li
ghti
ng
of red
–
b
l
ue
LED c
o
mb
ine
d
li
ghts. T
h
e
tes
t
result shows that this syst
em
not only reali
z
e
s
supp
lem
e
ntary lighting as r
equir
ed
and by
wave bands,
but
also sav
e
s e
l
e
c
tric pow
er. This system
has
distinctiv
e feat
ures of stron
g
app
lic
a
b
il
ity, good
expa
nd
abi
lity,
stable a
nd re
lia
ble o
perati
on,
and vis
ual
and
simple c
ontrol.
Ke
y
w
ords
:
straw
berry gre
enh
ous
e, intell
ige
n
t suppl
e
m
ent
ary li
ghtin
g,
LED combi
n
e
d
lig
ht, emb
e
d
ded
control
l
er
Copy
right
©
2015 Un
ive
r
sita
s Ah
mad
Dah
l
an
. All rig
h
t
s r
ese
rved
.
1. Introduc
tion
Light is
an i
m
porta
nt env
ironm
ental fa
ctor fo
r the
gro
w
th of pl
ants. It reg
u
l
a
tes a
nd
controls th
e gro
w
th of pl
ants an
d the
quality of
fruits. Lighting
conditio
n
s i
n
clu
de inten
s
ity,
quality, and duration. Phot
osynthe
s
i
s
take
s place wi
t
h
in the rang
e
of visible spectru
m
(38
0
nm
to 760
nm
). T
he 4
00
nm to
520
nm
blu
e
–
violet light a
nd the
600
n
m
to 70
0 nm
red–
orange
li
ght
contri
bute m
o
st to photo
synthesi
s
[1-3]
.
At present
,
the main st
udy dire
ction
of artificial li
ght
sou
r
ce is the
individual re
gulation a
nd
control
functi
ons of red, blue, and
re
d–blu
e
lights to
asp
e
ct
s su
ch
as growth, ph
otosynthe
s
i
s
, sub
s
tan
c
e m
e
taboli
s
m, an
d gene exp
r
e
ssi
on of plant
s.
Therefore, a
c
curately gra
s
ping the light
ing in
form
atio
n is the prerequi
site for scientific
cultivation i
n
a green
hou
se environm
en
t. With t
he
progre
s
s of
sci
ence a
nd th
e
develo
p
ment
of
agri
c
ultu
ral t
e
ch
nolo
g
y, the ap
plicatio
n of artifi
cial
light or
sup
p
lementa
r
y li
ghting
sou
r
ces in
agri
c
ultu
ral produ
ction is ra
pidly developi
ng. In
rece
nt years, in
can
d
e
scent, fluore
s
cent, sodi
u
m
,
and hig
h
-p
re
ssure m
e
rcu
r
y lamps
with large
ene
rgy con
s
umpt
ion are
com
m
only use
d
to
improve g
r
ee
nhou
se lighti
ng. Based o
n
statis
tics, 35% of the energy con
s
umed by glo
bal
agri
c
ultu
ral p
r
odu
ction
an
nually is u
s
e
d
for the
faci
lities ho
rticult
u
re
in
du
stry, and the e
nergy
c
o
s
t
c
o
ns
titutes
15% to 40% of th
e total c
o
st
of greenh
o
u
se
cro
p
s.
Thus, the e
nergy
con
s
um
ption
is signifi
cant
and not eco-f
r
iendly [4-6].
The inten
s
ity of light cannot be adjuste
d
based on the
intensity of natural light, a
nd a suit
a
b
le temperature must
always be
maintain
e
d
.
Strawb
errie
s
requi
re different
lighting
in
tensit
ie
s an
d
temperature
s
in different p
e
riod
s
of
growth. Thus, an intelligent supp
lementary lighting system for
a strawberry
greenhouse is
desi
gne
d in this
study. Th
is sy
stem de
tects t
he li
gh
ting inten
s
ity and the tem
peratu
r
e
of the
stra
wbe
rry g
r
een
hou
se, and
tran
sfers data
wi
rel
e
ssly with
APC220
-43.
The ST
C8
9C5
2
SCM
()
Single
chip
micro
c
omp
u
ter
control
s
the
red–
blue
LE
D combin
ed
lights a
n
d
the
temperature
control devi
c
e to reali
z
e
intelli
gent supplem
enta
r
y lighting for the stra
wb
erry
greenhouse. A study on an inte
lligent supplem
entary lighting
system for a strawberry
gree
nho
use i
s
impo
rtant i
n
ch
angin
g
the environm
ental pa
rame
ters of g
r
e
e
n
hou
se
stra
wb
erry
planting. It can al
so
sig
n
i
f
icantly re
du
ce ene
rg
y co
nsum
ption, shorten
the st
rawbe
rry
g
r
o
w
th
cycle, an
d improve the st
ra
wbe
rry qu
ality.
Evaluation Warning : The document was created with Spire.PDF for Python.
TELKOM
NIKA
ISSN:
1693-6
930
An Intelligent Supplem
enta
r
y Lig
h
ting System
fo
r the Strawb
erry G
r
een
hou
se
(Z
hiliang Kan
g
)
753
2. O
v
erall Design
An intelligent
sup
p
leme
ntary lighting syst
em
for the strawb
erry gree
nhou
se i
s
de
sign
ed
in t
h
is
st
u
d
y
.
This
sy
st
em
c
onsi
s
t
s
of
d
e
t
e
ct
ion
mod
u
l
e
s, e
m
bed
de
d controller a
nd its ap
plication
circuit, LCD t
ouchscreen,
wirel
e
ss d
a
ta
tran
sfer
m
o
d
u
le, SCM, te
mperature
co
ntrol devi
c
e,
and
LED
com
b
ine
d
light
and
its driving
circui
t. The d
e
tecti
on m
odule
co
nsi
s
ts
of tem
peratu
r
e
sen
s
or
DS18B2
0
, 60
0
nm to 7
00
nm red lig
ht
sen
s
o
r
, an
d
400
nm to
50
0
nm blu
e
lig
ht se
nsor
2DU6.
An embed
de
d small
syste
m
application
circuit
is co
mposed of a
S3C64
10 em
bedd
ed controller,
a 2
GB SDRAM conn
ecte
d by two pieces of
K4X1G
163PC-FG
C6
memory, an
d a 16
GB NAND
Flash
co
nne
cted by a
pi
ece
of K9G
A
G08U0E-S
memory. It collect
s, store
s
, analy
z
e
s
, and
pro
c
e
s
ses li
g
h
ting inform
ation. The L
C
D touch
s
cre
en
displ
a
ys the
detecte
d data
and is u
s
e
d
for
touch
control
of the i
n
telli
gent
sup
p
lem
entary
lig
htin
g sy
stem
by
employing
th
e AT07
0TN8
3V1
module. T
h
e
S3C6
410
embed
ded
controlle
r g
e
n
e
rate
s temp
eratu
r
e a
n
d
lighting
co
ntro
l
comm
and
s a
nd data
ba
se
d on th
e envi
r
onm
ental p
a
r
am
ete
r
s an
d
the set thre
shold valu
e of
the
stra
wbe
rry
greenh
ou
se
an
d tra
n
sfe
r
s th
em to th
e S
T
C89
C
5
2
S
C
M thro
ugh
th
e wi
rele
ss
da
ta
transfe
r mo
d
u
le APC22
0-43. The ST
C89C52 contro
ls
the rel
a
y to swit
ch o
n
the heate
r
o
r
fan-
wet cu
rtain so that appro
p
r
iate tempe
r
a
t
ure of
the strawb
erry gree
nhou
se is m
a
intained. Wh
en
the lighting in
the green
ho
use i
s
insuffi
cient, t
he STC89
C
5
2
gen
erate
s
PWM
sign
als that d
r
ive
the chip PT4
107 to ch
ang
e the output
curre
n
t, thus
controlling th
e lighting inte
nsity of the red–
blue LE
D
combined light.
The deta
iled
structure of t
he
intelligent supplement
ary lighting
syst
em
for the stra
wb
erry green
ho
us
e i
s
sh
own in Figure 1.
Figure 1. Overall structu
r
e
of
the intelligent sup
p
leme
ntary light
ing
system of the
stra
wbe
rry
gree
nho
use
3. Design of Combined L
E
D Light So
urce
Photosynthe
s
is take
s pla
c
e within the range
of visibl
e spe
c
tru
m
(380 nm to 760 nm).
The 4
00 nm t
o
520
nm bl
u
e–violet light
and the
600
nm to 70
0 n
m
red
–
o
r
ang
e light contri
b
u
te
most to phot
osynthe
s
i
s
. LED ca
n emit the mono
ch
romatic lig
hts
(su
c
h
as 6
50
nm red li
ght and
450 nm
blue
light) requi
re
d by plant
s for g
r
o
w
th.
T
h
is
study di
scovered t
hat
the red
light
can
prom
ote the developm
ent
of the stems and en
abl
e balan
ced
distrib
u
tion o
f
starch, sol
uble
sa
cchari
d
e
s
,
su
cro
s
e,
and
FAA in th
e
stems
and
lea
v
es of
plant
s. The
blu
e
lig
ht ca
n p
r
om
o
t
e
the gro
w
th
o
f
the root
system a
nd e
n
able t
he accumulation of
dry
matters;
synthe
sis;
a
nd
accumul
a
tion
of solu
ble
sa
cchari
d
e
s
, st
arch, and
FA
A. Perfectly forme
d
pla
n
ts
can
be
cultivated
only with
an
approp
riate p
r
opo
rtion
of red an
d bl
ue
l
i
ghting inte
nsity (R/B). The
r
efore, the L
E
D
combi
ned li
g
h
t sou
r
ce in
clude
s app
ro
p
r
iate red an
d
blue light
s, and a
d
just
s the propo
rtion
of
su
ch light
s to the optimal propo
rt
ion of lighting inten
s
i
t
y and quality requi
red by plants for g
r
o
w
th
[7-10].
Evaluation Warning : The document was created with Spire.PDF for Python.
ISSN: 16
93-6
930
TELKOM
NIKA
Vol. 13, No. 3, September 20
15 : 752 – 758
754
This d
e
si
gn e
m
ploys P
H
ILIPS Luxeon Rebel mo
del re
d or bl
ue
UHB LED. All their half
-
intensity angl
es are 62.5°.
The cent
ral
wavele
ngth o
f
the red LED is 65
0 nm
, the minimum
luminou
s flux is 40 lm, and the operatin
g current
is 3
50
mA. The central wavele
ngth of the blue
LED i
s
47
0 n
m
, the minim
u
m lumin
o
u
s
flux is 30 l
m
, and the
op
erating current
is 35
0 mA. T
h
e
LED
works 5
0000
h at 2
5
°C an
d h
a
s
a high
lume
n
kee
p
ing
rate
. Thus, it
ca
n en
su
re b
e
tter
stability of output lighting intensity.
Given the hi
gh directivity of
LED, even R/B pro
portion on
an irradiation a
r
ea
can b
e
reali
z
ed o
n
ly with a rea
s
o
n
able array de
sign.
The propo
rtio
n of red an
d blue LEDs e
m
ployed in
th
is study is
4:1. The sp
aci
ng of the
red
LED i
s
1
5
mm and
th
at of the blu
e
LED i
s
30
m
m
. In pra
c
tical appli
c
atio
n
s
, the q
uantit
y o
f
LED light de
pend
s on th
e
size
of
the strawb
erry gre
enho
use. Th
e array of the red
–blu
e
L
E
D
combi
ned lig
ht is sho
w
n in
Figure 2.
Figure 2. the array of red-b
l
ue LED com
b
ined light
(a) 3
D
di
strib
u
tion diag
ram
of irradia
n
ce of
blue light
3D di
stributio
n diagram
of irra
dian
ce of red
light
Figure 3. 3D
distrib
u
tion di
agra
m
of irra
dian
ce of red
and blu
e
light
Simulation a
nalysi
s
is condu
cted
usi
ng t
he
profe
ssi
onal li
ght
simul
a
tion
softwa
r
e
Tra
c
ePro to i
n
vestigate th
e irradia
n
ce
distri
b
u
tion of
the re
d an
d
blue LE
Ds
on the pl
ane
of
illumination
3
m away, a
s
sho
w
n i
n
Fig
u
re
3(a
)
and Figure
3
(
b). The re
sults show
th
at
the 3
D
distrib
u
tion of
irra
dian
ce of
bot
h the red
and blu
e
LE
Ds on th
e plan
e of illuminati
on is
even. After
combi
n
ing, the red and
blue LEDs
will f
o
rm the
spect
r
al absorption peak that
coi
n
cides with the
photo
s
ynthe
s
is a
nd m
o
rp
hoge
ne
sis of
strawb
erry.
Even dist
ribu
tion of i
rra
di
ance of th
e l
i
gh
t
Evaluation Warning : The document was created with Spire.PDF for Python.
TELKOM
NIKA
ISSN:
1693-6
930
An Intelligent Supplem
enta
r
y Lig
h
ting System
fo
r the Strawb
erry G
r
een
hou
se
(Z
hiliang Kan
g
)
755
source on the plane of illuminati
on i
s
crucial. It guarantees
rel
a
tively even illumi
nation, ensures
that each lea
f
and the
ent
ire pla
n
t re
ce
ive ev
en light
ing to the m
a
ximum exte
nt, and redu
ces
artificial e
rro
rs and effe
cts
cau
s
e
d
by the light sou
r
ce
.
4. Design of the Intelligent
Supplementar
y
Lighting Sy
stem
The de
sign
of the intelligent su
pple
m
entary li
ght
ing system
con
s
i
s
ts of two pa
rts:
hard
w
a
r
e
ci
rcuits an
d software.
The
h
a
rd
wa
re
circuits a
r
e
com
posed of
det
ection
mod
u
l
e
s,
embed
ded
controlle
r S3C6410, LC
D touchscreen,
wirel
e
ss dat
a
transfe
r mo
dule APC22
0
-
43,
SCM STC89
C
51, temp
era
t
ure
control d
e
vice, an
d re
d–blu
e
LED
combi
ned li
g
h
t and its
dri
v
ing
circuit; the
so
ftware
de
sig
n
incl
ude
s
em
bedd
ed
co
ntroller S3C641
0, SCM
STC89C51
pro
g
ram
desi
gn, and i
n
telligent co
mpleme
ntary lighting strate
gies.
4.1. Design
of the
Hard
w
a
re Circui
ts
The dete
c
tio
n
modul
es a
r
e cl
assified
into thr
ee: te
mperature, red light inten
s
ity, and
blue light inte
nsity. Their
ci
rcuit
s
are sho
w
n in
Fig
u
re
4. The tempe
r
ature se
nsor DS18B20
an
d
its sta
nda
rd
reg
u
lating
circuit p
e
rfo
r
m tempe
r
atu
r
e d
e
tectio
n, and th
e 6
0
0
nm to 7
0
0
nm
wavele
ngth red light se
nsor 2DU6 a
n
d
the 400 nm
to 500 nm blu
e
light 2DU6
are u
s
ed a
s
the
sen
s
in
g devi
c
e
s
for red
and blu
e
lig
hts. The fou
r
-cha
nnel o
p
e
ration
al am
plifier LM3
2
4
is
employed, an
d the small si
gnal stan
da
rd
I/V conver
tin
g
and filter ci
rcuit
s
are a
p
p
lied to conv
ert
and
amplify the
sho
r
t-ci
rcuit
cu
rrent
of t
he
det
ected
two
-
ch
annel
sili
con
photo
c
ell
s
.
The
regul
ated
two
-
ch
ann
el a
nal
og
sign
als a
r
e imp
o
rted
in
to the I/O
po
rt of the
emb
e
dded
controller
with A
D
C fu
nction
to
real
ize li
ghting
i
n
tensit
y d
e
te
ction
by
wave ba
nd. T
h
e
syste
m
e
m
p
l
oys
sampli
ng re
si
stan
ce
s with different re
sistance
valu
es
to
e
n
s
u
r
e
that th
e
de
te
c
t
ed
o
u
t
pu
t vo
ltag
e
of both the re
d and blu
e
lig
hts is 0 V to 5 V.
Figure 4. Te
mperature a
n
d
lighting det
ection
circuit
The red–
blue
LED
com
b
in
ed light e
m
pl
oys a t
w
o-ch
annel
co
nsta
nt cu
rre
nt driv
ing ci
rcuit
and
utilize
s
t
he PWM
con
t
rol technol
o
g
y to sepa
ra
t
e
ly co
ntrol th
e bri
ghtne
ss
of red
an
d bl
ue
light LED
sup
p
lementa
r
y lighting
sets [1
1-14
]. Th
e e
m
bedd
ed
con
t
roller S3
C6
4
10 autom
atically
cal
c
ulate
s
su
ppleme
n
tary
lighting am
o
unt ba
s
ed o
n
the enviro
n
mental p
a
rameters of t
h
e
stra
wbe
rry
greenh
ou
se
an
d the
set thre
shol
d valu
e. It tran
sfers th
e data
to th
e
SCM ST
C89
C
5
2
throug
h the
wirel
e
ss d
a
ta
transfe
r mo
d
u
le APC22
0-43. The SCM
gene
rate
s PWM si
gnal
s
and
utilize
s
the
du
ty ratio to
cha
nge th
e
outpu
t cu
rre
nt
of th
e d
r
iving m
o
d
u
le PT4
107,
thus controllin
g
the re
d a
nd
b
l
ue LE
D
com
b
ined
light to
su
pplem
ent
t
he requi
rem
e
nt of dete
c
tin
g
light
by wa
ve
band. The p
r
i
n
cipl
e of the LED drivin
g circuit is
sho
w
n in Figure 5.
The
po
wer m
odule
suppli
e
s p
o
wer at
b
o
th AC 22
0
V and
DC 5
V. DC 5
V i
s
used
to
sup
p
ly po
we
r to the
det
ection
mod
u
l
e
, embe
dde
d controll
er
and it
s ap
pli
ed
circuit, L
C
D
touch
s
cre
en, wirel
e
ss
tran
sfer modul
e, SCM,
and
LE
D an
d its
driv
ing ci
rcuit. Th
e AC 2
20
V i
s
use
d
to sup
p
l
y
power to two types of temperat
ure
co
ntrol equi
pme
n
t: heater an
d fan-wet cu
rtain.
Evaluation Warning : The document was created with Spire.PDF for Python.
ISSN: 16
93-6
9
30
TELKOM
NIKA
Vol. 13, No. 3, September 20
15 : 752 – 758
756
Figure 5. LED driving
circuit
4.2. Design
of the So
ft
w
a
re
The
softwa
r
e
desi
gn of th
e strawberry
gr
e
enho
u
se
intelligent
supplem
enta
r
y lighting
system in
clu
des p
r
og
ram
desig
n of the embed
ded
controller S
3
C6
410 a
nd
SCM STC8
9
C
51
and intellige
n
t
supplem
ent
ary lighting st
rategie
s
.
The
pro
g
ra
m
de
sign
of t
he em
bed
de
d contro
ll
er S3C64
10
i
n
clude
s sen
s
o
r
analytic
function, data
manage
ment
and de
cisio
n
making, tou
c
hscre
e
n inte
rface, wi
rele
ss data re
ceivin
g
and
sen
d
ing,
and p
a
ra
m
e
ter setting
prog
ram
s
. T
he prog
ram
desi
gn of th
e SCM in
clu
des
wirel
e
ss d
a
ta
receiving a
nd sendin
g
, PWM si
gnal
control, displ
a
y, and tem
peratu
r
e
cont
rol
equipm
ent progra
m
s.
The temp
era
t
ure, lightin
g
paramete
r
s,
dat
a sampli
ng
pe
riod, supplem
enta
r
y
lighting
time, and wo
rking time of t
he tempe
r
atu
r
e contro
l
eq
uipment of th
e stra
wb
erry gree
nho
u
se can
be
set
and
ch
ange
d u
s
in
g t
he L
C
D tou
c
h
s
cree
n. Th
e
e
m
bedd
ed
co
n
t
roller S3
C64
1
0
colle
cts th
e
temperature
and lig
hting i
n
formatio
n of
the det
e
c
tio
n
mod
u
le. Suppo
sin
g
the
sup
p
leme
ntary
lighting time i
s
set at a total of 12 hou
rs from 8:0
0
AM to 8:00 PM, the data sampling
peri
o
d
is
set a
s
2
0
min; light is
no
t suppl
eme
n
ted in the
re
maining
12
h
o
urs, an
d th
e data
sam
p
l
i
ng
perio
d i
s
set
as 3
0
min. T
h
e suita
b
le
gro
w
th temp
erat
ure fo
r
stra
wberry is
18
°
C
to 25
°
C
. Wh
en
the temperature is b
e
lo
w 15 °C fro
m
8:00 AM to
8:00 PM, the heater will be
started for 3
0
min. If
the tempe
r
at
ure i
s
above
30 °C, the fa
n-wet curtai
n
will b
e
start
e
d for 30
mi
n. Supple
me
nting
light from 8:0
0
PM to 8:00 AM of the next day
is unnece
s
sary. Ho
wever, the
strawb
erry must
be
prevente
d
fro
m
free
zin
g
in
the g
r
ee
nhou
se. T
h
u
s
, the
tempe
r
atu
r
e
s
a
r
e
dete
c
te
d on
ce
eve
r
y
30
min. When th
e temperature is belo
w
5 °C, the heat
er
will be autom
atically starte
d for 30 min.
Figure 6. Wo
rk flow of intell
i
gent su
pple
m
entary lighti
n
g syste
m
Evaluation Warning : The document was created with Spire.PDF for Python.
TELKOM
NIKA
ISSN:
1693-6
930
An Intelligent Supplem
enta
r
y Lig
h
ting System
fo
r the Strawb
erry G
r
een
hou
se
(Z
hiliang Kan
g
)
757
Dete
ction by
wave b
and i
s
employed,
a
nd t
he
sup
p
l
e
menta
r
y ligh
t
ing effect im
prove
s
whe
n
the
rati
o of the
red
and
blue
LE
Ds is 4:
1. T
he inte
nsity
of the
red
a
nd bl
ue li
ght
s i
s
detecte
d fro
m
8:00 AM to 8:00 PM. Whe
n
the int
ens
ity of the red lig
ht is lo
wer th
an 24
0
0
lx, it
will autom
atically suppl
e
m
ent the red
light so
th
at its inten
s
ity rea
c
he
s
24
00 lx. Whe
n
the
intensity of the blue light i
s
lowe
r than 6
00 lx,
it will automatically
supplem
ent th
e blue lig
ht so
that its inten
s
ity reache
s 6
00 lx. Sunligh
t
at noon
is favorabl
e, an
d
the threshol
d value
s
a
r
e
set
for the i
n
ten
s
ity of the re
d
and
blue
lig
hts.
Th
us, th
e suppl
ement
ary lightin
g
system
stops the
supplementary lighting at
this time. The work
flow
of the intelligent
supplem
entary lighting
system i
s
sh
o
w
n in Figu
re
6.
5. Sy
stem T
esting
This sy
stem i
s
install
ed an
d tested in stra
wb
erry gree
nhou
se
s of t
he stra
wbe
rry
planting
base of Shua
ngliu Co
unty, Sichuan Pro
v
ince. Two
st
rawbe
rry gre
enho
uses of the sam
e
si
ze
at
the same l
o
cation are em
ployed in the test. One
is
installed with the
intelligent supplementary
lighting
syste
m
, and the
ot
her i
s
n
o
t. Th
e green
hou
se ha
s a l
engt
h of 30
m, a
width of
8
m, and
a heig
h
t of 2.
5
m. The in
st
allation h
e
igh
t
of t
he heate
r
s i
s
0.5
m, the spa
c
ing
of the heate
r
s i
s
7.5
m, and th
e heate
r
s are
3.75
m a
w
ay
from both
si
des
of the g
r
eenh
ou
se. T
he wet cu
rtai
n is
installe
d in
th
e middl
e
side
of the l
ong
side of
th
e g
r
e
enho
use, an
d
the fan
is in
stalled o
ppo
sit
e
to the wet
curtain and 2
m
above the g
r
ound. Th
e re
d–blu
e
LED
combine
d
light
is in
stalled 1
m
above th
e g
r
ound.
The
q
uantity of the
LED light
se
ts is
cal
c
ulat
ed b
a
sed
on
the
are
a
of
the
gree
nho
use
and the
LE
D array, and
the
R/B of ea
ch
set of li
gh
t is 4:1.
Du
ri
ng the te
st, the
intelligent su
ppleme
n
tary l
i
ghting time is set a
s
8:00
AM to 8:00 PM, the temperatu
r
e is
set
as
15
°C to 3
0
°
C
, an
d the
l
o
we
r tem
perature
limit in
the ni
ght i
s
5
°C. T
he
sa
mpling
pe
rio
d
at
daytime and
at night is set as 20 a
nd 3
0
min, re
spe
c
tively. Figure 8 sho
w
s the
comp
ari
s
o
n
test
curve
of the
red li
ght int
ensity, blue l
i
ght in
ten
s
ity, and tem
perature
of the
two st
ra
wbe
r
ry
gree
nho
uses
in 12 h from 8
:
00 AM to 8:00 PM.
Figure 7. Curve graph of compa
r
ison te
st
It is obvious from the Fi
gure
7 that R0, B0,
T0 is the re
d lig
ht intensity, blue light
intensity and
temperatu
r
e
of the
strawberry without
th
is system;
R1, B1, T1 is the red lig
ht
intensity, blue light intensi
t
y and
temperature of the stra
wbe
rry wi
th this syste
m
.Figure 7
shows
that the
red
light inten
s
ity of the
gree
nhou
se
with
out the
intell
igent
sup
p
le
mentary li
ght
ing
system i
s
bel
ow 24
00
lx d
u
ring t
w
o pe
riods:
8:00
A
M
to 12:40
PM and 4:2
0
PM to 8:00
PM.
Ho
wever, the
sunlig
ht is favorable from 1:00
PM
to 4:00 PM. Thus,
the red light i
n
tensity in su
ch
perio
d i
s
ab
o
v
e 2400
lx. B
y
contrast, th
e re
d light
i
n
tensity of the
other
strawb
e
rry g
r
ee
nho
u
s
e
with the syst
em is app
roxi
mately 2400
l
x
in two periods: 8:00
AM
to 12:40
PM and 4:20
PM to
8:00 PM.
Given that
suppl
ementing
ligh
t
from
1:00
P
M
to 4:0
0
PM is un
ne
ce
ssary, the
re
d li
ght
intensity of both gree
nho
u
s
e
s
is the sa
me. From
8:0
0
AM to 10:20
AM and 5:4
0
PM to 8:00 PM,
the blue
light
intensity i
s
be
low
600 lx, a
nd the
st
rawb
erry gre
enh
o
u
se
with
thi
s
system re
alized
sup
p
leme
ntary lighting as requi
re
d. Given that the tempe
r
ature
from 8:00 AM to 10:40 AM is
low, the temp
eratu
r
e of the stra
wberry greenh
ou
se wit
hout this sy
st
em is belo
w
1
5
°C. To obtai
n
0
5
10
15
20
25
30
0
500
1000
1500
2000
2500
3000
3500
4000
4500
8:00
8:40
9:20
10:00
10:40
11:20
12:00
12:40
13:20
14:00
14:40
15:20
16:00
16:40
17:20
18:00
18:40
19:20
20:00
R0
R1
B0
B1
T0
T1
Evaluation Warning : The document was created with Spire.PDF for Python.
ISSN: 16
93-6
930
TELKOM
NIKA
Vol. 13, No. 3, September 20
15 : 752 – 758
758
a suitabl
e supplem
enta
r
y lighting tem
peratu
r
e fo
r
the stra
wb
erry, the green
hou
se with t
he
intelligent su
ppleme
n
tary
lighting sy
ste
m
star
ted th
e heater fo
r 30 min at 8:00 and 9:40
AM.
With the su
ppleme
n
tary
lighting, the temperat
u
r
e
of the strawbe
rry gree
nhou
se with
the
intelligent sup
p
lementa
r
y lighting sy
ste
m
remain
ed stable above 1
5
°C.
6. Conclusi
on
This
study p
r
opo
se
s a
n
i
n
telligent
sup
p
lem
enta
r
y li
ghting
syste
m
for the
strawb
erry
gree
nho
use u
s
ing the em
b
edde
d co
ntrol
l
er S3C641
0.
This
system control
s
the te
mperature a
n
d
intelligent re
d
and blue lig
hts of
the strawb
erry gree
nhou
se by wave band a
s
requi
re
d. It also
analyzes the
influen
ce
of
the
red
–blu
e
LE
D
com
b
ined li
ght a
r
ray on
the
e
v
enne
ss of t
he
compl
e
me
nta
r
y lighting of the stra
wbe
r
ry greenh
ou
se
, and the array whose R/
B is 4:1 with
the
best lightin
g evenne
ss is selecte
d
.
The system satisfie
s
the light
ing that
is re
qui
red f
o
r the
gro
w
t
h
of strawbe
rry an
d
improves the utilization rate of
the output light to the
maximum de
gree. Thus, the requirement of
intelligent an
d accurate su
ppleme
n
tary l
i
ghting fo
r different g
r
o
w
th perio
ds a
nd
environ
ment
s of
stra
wbe
rry
is sati
sfied. All
types of p
a
rameters
i
n
th
is
system
ca
n be
fre
e
ly set ba
sed
on
the
experie
nce a
nd ha
bits of
cro
p
s. T
h
e
r
ef
ore, th
i
s
sy
stem can b
e
convenie
n
tly tran
sform
ed t
o
con
d
u
c
t intelli
gent suppl
em
entary lightin
g for
cro
p
s
ot
her tha
n
stra
wbe
rry. Th
e test result pro
v
es
that
this syst
em
not only reali
z
e
s
sup
p
l
ementa
r
y
lig
hting a
s
req
u
i
red, b
u
t al
so
save
s
ele
c
tric
energy. Thi
s
system
ha
s t
he di
stin
ct fe
ature
s
of st
ro
ng a
ppli
c
abili
ty, good
exp
anda
bility, stable
and reli
able o
peratio
n, and
visual an
d si
mple ope
ratio
n
and control.
Ackn
o
w
l
e
dg
ements
The
re
sea
r
ch
wo
rk
wa
s
suppo
rted
Ke
y Proje
c
ts in
Sich
uan
Pro
v
ince
De
part
m
ent of
Educatio
n No
. 15ZA0019.
Referen
ces
[1]
Silva M
a
rcos
VG, Enes Adi
l
s
on, F
a
b
b
ro In
cio MD, et
al.
Devel
opm
ent
of a n
e
w
m
e
th
od for v
o
lum
e
measur
ement
base
d
on mo
ir techni
qu
es.
INMATEH - Agricultural Engineering
. 20
14; 44(
3): 87-92.
[2]
Z
HU Jin
g
-
x
i
an.
Influe
nce
of
Artificial
Sup
p
l
e
ment
of L
i
ght
on
Pla
n
t Gro
w
t
h
a
n
d
Dev
e
l
opme
n
t.
Cro
p
Research
. 20
1
2
; 26(1): 74-7
8
.
[3]
Yang
Qicha
ng,
Xu Z
h
i
g
a
ng,
Che
n
H
ong
da.
App
licati
on Pr
incip
l
e
an
d T
e
chno
log
y
Pro
g
r
ess in
Usi
n
g
Lig
h
t-Emitting
Diod
e
(LE
D
) Li
ght S
ourc
e
s in
Modern A
g
ric
u
lture.
Jour
na
l
of Agricultur
al
Science
and
T
e
chno
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. 2
011; 13(
5): 37-
43.
[4]
Yang Ji
aqi
an
g
.
An Intellige
n
t
Greenhous
e
Control S
y
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T
E
LKOMNIKA Indones
i
an Jour
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ngi
neer
ing
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013;
11(8): 46
27-
46
32.
[5]
Liai
Gao,
A
W
i
reless Gre
e
nho
use
Mon
i
torin
g
S
y
stem
Base
d
on
S
o
lar
Ener
g
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,
TELKOMNIKA
Indon
esi
an Jou
r
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al Eng
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ne
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4.
[6]
Marin E, Pir
n
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e
chn
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n a
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l
imate co
ntrol i
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e
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l
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E
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al Eng
i
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eeri
n
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14; 4
4
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.
[7]
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hang
Ha
ih
ui,
Yang
Qin
g
, Hu
Jin,
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l
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lf-
ada
ptive an
d precis
e
su
pp
le
m
entar
y
lig
htin
g s
y
stem f
o
r
pla
n
t
w
i
t
h
contr
o
lla
bl
e LED i
n
tensit
y.
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r
ansac
tions of the CS
AE
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)
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8.
[8]
Z
hou Deta
o, F
an Guan
gh
an, Xu Yi
qi
n, et al. De
sig
n
Of LED arra
ys use
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umi
n
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Instrum
e
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79.
[9]
Liu W
e
ig
uo, So
ng Yin
g
, Z
ou Junli
n
, et al. De
sign
a
nd effect of LED simulat
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umi
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n envir
onme
n
t
on i
n
tercrop
p
i
n
g po
pul
atio
n.
T
r
ansactio
n
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f
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nese
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i
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l
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i
n
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[10]
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h, AN Erokh
i
n, et
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w
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d p
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in
ese ca
bb
ag
e
pla
n
ts gro
w
n
u
nder l
i
ght-em
i
tting d
i
od
e-b
a
se
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