2015_chuong 2_cam bien tiem can cam-tu-dung.pdf
TRANSCRIPT
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8/20/2015
1
B CNG THNG
TRNG I HC CNG NGHIP TPHCM
19:19 AM
TS Trn Hu Ton
B Mn T T ng
08-2015
K THUT CM BIN V O LNG
NI DUNG SV CN TM HIU
CHNG 2. CM BIN TIM CN (T-DUNG)
Khi nim cm bin tim cn
Hnh dng cch nhn bit
K hiu cch s dng
ng dng thc t
9:19 AM 2
PHNG PHP THC HIN
SV cn lm r cc ni dung c gi t cc
slide c ngh phng php thc hin mu tm.
SV tm hiu thm ti liu v a vo ni dung
l r cho cc ca bi.
SV cn tm cc datasheet lin quan cc cm
bin m mnh bo co ch dn cch s dng
SV phi tm cc ng dng thc t (video)9:19 AM 3
CM BIN T
Loi in cm
Loi t cm (tc ng bng tip im)
Loi t cm (tc ng bng mch t)
49:19 AM
Gii thiu?
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8/20/2015
2
Sensor
PLC
Box Rejecter
qConveyor
Motor
ProductProduct
INPUT
Sensor
CONTROL
PLC
OUTPUT
Conveyor/ Rejecter
ng Dng Sensor Trong H Thng iu Khin T ng
59:19 AM
Cm bin tim cn l g?
Cm bin c s dng u?
PROXIMITY SENSOR
69:19 AM
Cm Bin Tim Cn
c im:
Pht hin vt khng cn tip xc.
Tc p ng cao.
u sensor nh c th lp nhiu ni.
C th s dng trong mi trng khc nghit.
Cm Bin
Cm Bin
Vt Cm BinVt Cm Bin
79:19 AM
Phn tch cc c im sau?Cm Bin Tim Cn
Loi
Cm ng t
Loi
in dung
89:19 AM
Phn loi cm bin tim cn?
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8/20/2015
3
1. CM BIN CM NG T
99:19 AM
Cm Bin Tim Cn
Cm ng T
Mch Dao ng
Vt cm bin
Li cm bin
Nguyn Tc Hot ng:
T trng do cun dy ca sensor to ra s thay i khi tng tc vi vt th kim loi (do ch pht hin c vt th kim loi).
109:19 AM
Phn tch nguyn l hot ng?
Hnh dng
Cm Bin Tim Cn
Cm ng T
119:19 AM
Gii thiu mt s hnh dng?
Nguyn l hot ng
Cm Bin Tim Cn
Cm ng T
129:19 AM
Gii thch hot ng ca hnh sau?
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8/20/2015
4
Nguyn l hot ng
Cm Bin Tim Cn
Cm ng T
139:19 AM
Phn tch cc khi trong cm bin?
CM BIN CM NG T
Cp kt ni
LED ch bo
Cun cm
B mt tc ng
T trng tn s cao (300-800kHz)
LOI IN CM (Inductive sensor)
149:19 AM
Phn tch cc thnh phn ca cm bin?
Tn s mch dao ng LC thng t 100Khz n Mhz.
Nguyn l
CM BIN CM NG T
LOI IN CM
159:19 AM
Gii thch nh hng ca tn s lm vic mch dao ng?
Khi c vt th bng kim loi i vo vng t trng.
T trng ny cm ng ln vt th mt dng in
xoay trn gi l dng in xoy.
Nguyn l
CM BIN CM NG T
LOI IN CM
169:19 AM
Gii thch nh hng ca tn s lm vic mch dao ng?
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8/20/2015
5
Dng in xoy to ra mt trng ngc chiu vi
t trng ban u.
T trng ny lm gim bin mch dao ng LC
bn trong cm bin.
Nguyn l
CM BIN CM NG T
LOI IN CM
179:19 AM
Gii thch nh hng ca tn s lm vic mch dao ng? nh hng ca dng in xoy lm
thay i bin b dao ng LC.
Mch pht hin ngng (trigger)
gim st s thay i bin trn v
kch mch ng ra (output switch) mi
khi c s thay i vt ngng.
Ng ra cm bin l tn hiu ON/OFF.
Nguyn l
CM BIN CM NG T
LOI IN CM
189:19 AM
Gii thch nh hng ca tn s lm vic mch dao ng?
Dng in xoy
CM BIN CM NG T
LOI IN CM
199:19 AM
Gii thch dng in xoy?
Cun dy cha cp in
Dng in xoay chiu cp vo cun dy
Dng in xoy
CM BIN CM NG T
LOI IN CM
209:19 AM
Gii thch dng in xoy?
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8/20/2015
6
T trng to ra xungquanh cun dy khi cdng in xoay chiuchay qua.
Khi c vt th bng kimloi a vo t trng.Dng in xoy s ccm ng vo kim loi.
Dng in xoy
CM BIN CM NG T
LOI IN CM
219:19 AM
Gii thch dng in xoy?
Dng in xoy trong kim loi to ra t trng th hai ngc vi t trng ban u.
Dng in s b ngt qung khi c vt nt trn vt liu dn in.
LOI IN CM Dng in xoyCM BIN CM NG T
229:19 AM
Gii thch dng in xoy?
Cm bin tim cn in cm c thit k to ra mt vng in t trng, Khi mt vt bng kim loi tin vo khu vc ny, xut hin dng in xoy (dng in cm ng) trong vt th kim loi ny
LOI IN CM
CM BIN CM NG T
239:19 AM
Gii thch vng t trng?
Mch pht hin s pht
hin s thay i tn hiu
v tc ng mch ra
ln mc ON (hnh v). Khi
i tng ri khi khu vc
in trng, s dao ng
c ti lp, cm bin tr
li trng thi bnh thng.
LOI IN CM Dng in xoyCM BIN CM NG T
249:19 AM
S thay i ca mch dao ng theo khong cch ca vt?
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8/20/2015
7
in p ngun thng t 10 ti 30VDC.
Ng ra thng c 3 dy nh hnh sau:.
Ng ra transitor loi PNP
CM BIN CM NG T
LOI IN CM Kt ni ti
259:19 AM
Gii thch kt ni ti loi PNP?
Ng ra transitor loi NPN
Kt ni ti
CM BIN CM NG T
LOI IN CM
269:19 AM
Gii thch kt ni ti loi NPN?
Thng s k thut
Loi c bc kim loi xung quanh chng nhiu.
CM BIN CM NG T
LOI IN CM
279:19 AM
Phn tch so snh hai loi?Loi khng c bc kim loi xung quanh t trng khng tp trung khng chnh xc.
Thng s k thut
CM BIN CM NG T
LOI IN CM
289:19 AM
Phn tch so snh hai loi?
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8/20/2015
8
Sensor
Bin tn hiu
Tn hiu ra ca Sensor
ON
OFF
Vt cn
Hot ng
CM BIN CM NG T
LOI IN CM
299:19 AM
Gii thch thay i bin ?
ON
OFF
Sensor
Bin tn hiu
Tn hiu ra ca Sensor
Vt cn
Hot ng
CM BIN CM NG TLOI IN CM
309:19 AM
Gii thch thay i bin ?
ON
OFF
Sensor
Bin tn hiu
Tn hiu ra ca Sensor
Vt cn
Hot ng
CM BIN CM NG T
LOI IN CM
319:19 AM
Gii thch thay i bin ?
ON
OFF
Sensor
Bin tn hiu
Tn hiu ra ca Sensor
Vt cnHot ng
CM BIN CM NG T
LOI IN CM
329:19 AM
Gii thch thay i bin ?
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8/20/2015
9
ON
OFF
Sensor
Bin tn hiu
Tn hiu ra ca Sensor
Vt cn Hot ng
CM BIN CM NG T
LOI IN CM
339:19 AM
Gii thch thay i bin ?
ON
OFF
Sensor
Bin tn hiu
Tn hiu ra ca Sensor
Vt cnHot ng
CM BIN CM NG T
LOI IN CM
349:19 AM
Gii thch thay i bin ?
ON
OFF
Sensor
Bin tn hiu
Tn hiu ra ca Sensor
Vt cnHot ng
CM BIN CM NG T
LOI IN CM
359:19 AM
Gii thch thay i bin ?
ON
OFF
Sensor
Bin tn hiu
Tn hiu ra ca Sensor
Vt cnHot ng
CM BIN CM NG T
LOI IN CM
369:19 AM
Gii thch thay i bin ?
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8/20/2015
10
ON
OFF
Sensor
Bin tn hiu
Tn hiu ra ca Sensor
Vt cnHot ng
CM BIN CM NG T
LOI IN CM
379:19 AM
Gii thch thay i bin ?
u nhc im ca cmbin in cm:
CM BIN CM NG T
LOI IN CM
u im:
Khng chu nh hng ca m Khng c b phn chuyn ng. Khng chu nh hng ca bi bm. Khng ph thuc vo mu sc. t ph thuc vo b mt i tng hn so vi
cc k thut khc. Khng c khu vc m (blind zone: cm bin
khng pht hin ra i tng mc d i tng gn cm bin).
389:19 AM
Phn tch cc u im?
u nhc im ca cmbin in cm:
CM BIN CM NG T
LOI IN CM
Nhc im:
Ch pht hin c i tng l kim loi.
C th chu nh hng bi cc vng in t
mnh.
Phm vi hot ng ngn hn so vi cc k
thut khc.
399:19 AM
Phn tch cc nhc im?
CM BIN CM NG T
LOI IN CM
SV tm t nht mt datasheet ca loi ny v
ch ra cc thng s cn thit khi s dng.
SV tm mt video ng dng m t cho loi
cm bin ny.
SV tm lc cc ni dung chnh ca CB ny.
409:19 AM
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8/20/2015
11
Hnh dng
CM BIN CM NG T
LOI T CM
419:19 AM
Gii thiu?
Cm bin loi ny pht hin c tt c cc loi vt liu
dn in trong khong cch cho php
Cm bin b nh hng bi 3 yu t:
Nhit
Vt cn bng kim loi
Khong cch vt cn
Tc ng bng tip im
CM BIN CM NG T
LOI T CM (Inductive Magnectic sensor)
429:19 AM
Gii thiu dng 1- Phn tch gii thch?
Tc ng bng tip im
CM BIN CM NG T
LOI T CM (Inductive Magnectic sensor)
439:19 AM
Gii thch?
ng thy tinh
Kh tr hoc chn khng
Tip im
St t (Niken)Led ch th
Tc ng bng tip im
CM BIN CM NG T
LOI T CM (Reed Switch)
449:19 AM
Gii thiu cu to?
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8/20/2015
12
Tc ng bng tip im
CM BIN CM NG T
LOI T CM
459:19 AM
Gii thch nguyn l hot ng?
Tc ng bng tip im
CM BIN CM NG T
LOI T CM
469:19 AM
Gii thch nguyn l hot ng?
Tc ng bng tip im
CM BIN CM NG T
LOI T CM
479:19 AM
Gii thch nguyn l hot ng?
Tc ng bng tip im
CM BIN CM NG T
LOI T CM
489:19 AM
Gii thch nguyn l hot ng?
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8/20/2015
13
Tc ng bng tip im
CM BIN CM NG T
LOI T CM
499:19 AM
Gii thch nguyn l hot ng?
Tc ng bng tip im
CM BIN CM NG T
LOI T CM
509:19 AM
Gii thch nguyn l hot ng?
24v
Tc ng bng tip im
CM BIN CM NG T
LOI T CM
519:19 AM
Gii thch nguyn l hot ng?
Tc ng bng tip im
CM BIN CM NG T
LOI T CM
529:19 AM
Gii thch nguyn l hot ng?
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8/20/2015
14
S ph thuc t cc t trng khc nhau cn c trnh:
V tr ca im tc ng ph thuc vo khong cch dch chuyn.
Dng cc i cn c gii hn trnh chy tip im.
CM BIN CM NG T
LOI T CM
539:19 AM
Gii thch mt vi ch ?
CM BIN CM NG T
LOI T CM
SV tm t nht mt datasheet ca loi ny v
ch ra cc thng s cn thit khi s dng.
SV tm mt video ng dng m t cho loi
cm bin ny.
SV tm lc cc ni dung chnh ca CB ny.
549:19 AM
Tc ng bng tip im
Tc ng bng mch t
CM BIN CM NG T
LOI T CM
Cu to gm mt b to dao ng tn s cao, dao ngny to t trng ng thu cm bin, khi vt c t trngtin n gn th s lm nh hng n t trng u thuv lm cho mch dao ng ca cm bin b nh hng,mch so snh pht hin cho ng ra cm bin dngon/off.
559:19 AM
Gii thiu dng 2?
Cp kt ni LED ch boCun dy mch t
Mch t tn s cao
Tc ng bng mch t
CM BIN CM NG T
LOI T CM
569:19 AM
Gii thiu cc thnh phn cu to CB?
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8/20/2015
15
Tc ng bng mch t
CM BIN CM NG T
LOI T CM
579:19 AM
Gii thch nguyn l hot ng?
Tc ng bng mch t
CM BIN CM NG T
LOI T CM
589:19 AM
Gii thch nguyn l hot ng?
Tc ng bng mch t
CM BIN CM NG T
LOI T CM
599:19 AM
Gii thch nguyn l hot ng?
Tc ng bng mch t
CM BIN CM NG T
LOI T CM
609:19 AM
Gii thch nguyn l hot ng?
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8/20/2015
16
Tc ng bng mch t
CM BIN CM NG T
LOI T CM
619:19 AM
Gii thch nguyn l hot ng?
Tc ng bng mch t
CM BIN CM NG T
LOI T CM (Inductive Magnectic sensor)
629:19 AM
Gii thch nguyn l hot ng?
Nguyn tc hot ng c bn ca cm bin in cm lhin tng cm ng t ca mch t
Cn ch khi thc hin trn cc dng t khc nhau.
Thit b lm vic trng thi ngm tn s lm vic cao -1kHz
Tc ng bng mch t
CM BIN CM NG T
LOI T CM
639:19 AM
Mt vi ch ?
CM BIN CM NG T
LOI T CM
SV tm t nht mt datasheet ca loi ny v
ch ra cc thng s cn thit khi s dng.
SV tm mt video ng dng m t cho loi
cm bin ny.
SV tm lc cc ni dung chnh ca CB ny.
649:19 AM
Tc ng bng mch t
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8/20/2015
17
Pht hin khun dp Pht hin palette
Ch pht hin st t
Loi trn
Cc Loi Tim Cn Cm ng TCc Loi Tim Cn Cm ng T
659:19 AM
Gii thch cc ng dng?
Pht hin lon nhm
Lon thp
Lon nhm
Lon nhm
Lon nhm
Ch pht hin nhm/ ng
Pht hin vt nh ming m trn palette
M nhm
Loi trn
Cc Loi Tim Cn Cm ng TCc Loi Tim Cn Cm ng T
669:19 AM
Gii thch cc ng dng?
Pht hin tt c kim loi
Pht hin tt c cc kim loi
Phn bit mt trn v mt di ca lon nc
Loi trn
Cc Loi Tim Cn Cm ng TCc Loi Tim Cn Cm ng T
679:19 AM
Gii thch cc ng dng?
Sensor pht hin trong mi trng nc (c th hot ng khi ngm trong nc)
Loi trn
Pht hin np chai nc trong mi trng m t
Cc Loi Tim Cn Cm ng TCc Loi Tim Cn Cm ng T
689:19 AM
Gii thch cc ng dng?
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8/20/2015
18
Kim tra kp
Kim tra gy mi khoang
Loi b khuch i ri
Cc Loi Tim Cn Cm ng TCc Loi Tim Cn Cm ng T
699:19 AM
Gii thch cc ng dng? Loi hnh ch nht
TL-N
TL-Q E2S
TL-T
Cc Loi Tim Cn Cm ng TCc Loi Tim Cn Cm ng T
709:19 AM
Gii thch cc ng dng?
Loi hnh ch nht
E2Q3
TL-GTL-W
TL-M
Cc Loi Tim Cn Cm ng TCc Loi Tim Cn Cm ng T
719:19 AM
Gii thch cc ng dng? Loi pht hin vt kim loi ri
Pht hin/ m vt kim loi ri
Cc Loi Tim Cn Cm ng TCc Loi Tim Cn Cm ng T
729:19 AM
Gii thch cc ng dng?
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8/20/2015
19
Cm Bin Tim Cn Phn Loi
T trng c tp trung trc
mt sensor nn t b nhiu bi
kim loi xung quanh, tuy nhin
khong cch o ngn i.
Loi C Bo V (Shielded):
Loi Khng C Bo V (Un-Shielded):
Khng c bo v t trng xung
quanh mt sensor nn khong
cch o di hn, tuy nhin d b
nhiu ca kim loi xung quanh.
Vt Cm Bin
Sensor
Shielded
Vt Cm Bin
Sensor
Un-Shielded
739:19 AM
Cc thng s k thut cn quan tm?
Cc Thut Ng Thng S Dng
1. Vt Chun (Standard Object):
Vt Chun (Standard Object):
Mt vt c xem l vt chun nu hnh dng, vt liu, kch c, v.v.v... ca vt phi ph hp pht huy c cc t tnh k thut ca sensor.
Vt liu
Hnh dng
Kch thc
Tc
v..v..v..
Vt chun
749:19 AM
Cc thng s k thut cn quan tm?
Cc Thut Ng Thng S Dng
2. Khong Cch Pht Hin (Detecting Distance):
Khong cch pht hin (Detecting distance):
L khong cch t b mt cm bin u sensor ti v tr vt chun xa nht m sensor c th pht hin.
Vt
Cm
Bin
B mt
cm bin
Cm Bin
Tim Cn
Khong Cch Pht Hin
Khong Cch Reset
759:19 AM
Cc thng s k thut cn quan tm?
Vt
Cm
Bin
B mt
cm bin
Cm Bin
Tim Cn
Khong cch pht hin c lng
Khong cch ci t
Cc Thut Ng Thng S Dng
3. Khong Cch Ci t (Setting Distance):
Khong cch ci t (Setting distance):
L khong cch t b mt cm bin u sensor ti v tr vt cm bin sensor c th pht hin vt n nh (thng th khong cch ny bng 70% 80% khong cch pht hin)
769:19 AM
Cc thng s k thut cn quan tm?
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8/20/2015
20
Cc Thut Ng Thng S Dng
4. Thi Gian p ng (Response Time):
Thi gian p ng (Response Time):
t1 : Khong thi gian t lc i tng chun chuyn ng i vo vng pht hin ca sensor ti khi u ra sensor bt ON.
t2 : Khong thi gian t lc i tng chun chuyn ng i ra khi vng pht hin ca sensor ti khi u ra sensor tt v OFF.
B mt
cm bin
Cm Bin
Tim Cn
Di hot ng
Vt
Cm
Bin
Trong di hot ng
Ngoi di hot ng
779:19 AM
Cc thng s k thut cn quan tm?
Cc Thut Ng Thng S Dng
5. Tn S p ng (Response Frequency):
Tn s p ng f (Response Frequency):
S ln tc ng lp li khi vt cm bin i vo vng hot ng ca sensor.
B mt
cm bin
Vt Cm Bin
khong cch cm bin
Cm Bin
Tim Cn
789:19 AM
Cc thng s k thut cn quan tm?
Khong Cch o - Cc Yu T nh Hng
1. Vt Liu i Tng (Material):
Iron
SUS
Brass
Aluminum
Copper
dn ca vt
Kh
on
g c
ch c
m b
in
(m
m)
Khong cch pht hin ca sensor ph thuc rt nhiu vo vt liu ca vt cm bin.
Cc vt liu c t tnh hoc kim loi c cha st s c khong cch pht hin xa hn cc vt liu khng t tnh hoc khng cha st.
Khong cch pht hin
Kim loi khng cha st (nhm, ng, )
Vt
u Sensor
Kim loi c t tnh (st, SUS, )
Vt
u Sensor
799:19 AM
Cc thng s k thut cn quan tm?
Khong Cch o - Cc Yu T nh Hng
2. Kch C Ca i Tng (Size):
Khong cch pht hin
Kch thc vt ln
Vt
u Sensor
Vt
u Sensor
Kch thc vt nh
Nu vt cm bin nh hn vt th chun (test object), khong cch pht hin ca sensor s gim.
809:19 AM
Cc thng s k thut cn quan tm?
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8/20/2015
21
Khong Cch o - Cc Yu T nh Hng
3. B Dy Ca i Tng (Size):
Vi vt cm bin thuc nhm kim loi c t tnh (st, niken, SUS, ), b dy vt phi ln hn hoc bng 1mm.
Vi vt cm bin khng thuc nhm kim loi c t tnh, b dy ca vt cng mng th khong cch pht hin cng xa
u Sensor
Vt
Khong cch cm bin
dy vt
819:19 AM
Cc thng s k thut cn quan tm?
Khong Cch o - Cc Yu T nh Hng
4. Lp M Bn Ngoi Ca Vt (Plating):
Nu vt b m, khong cch cm bin ca vt s b nh hng
829:19 AM
Cc thng s k thut cn quan tm?
Cc Loi u Ra Cch Mc Ti
Loi u ra AC 2 dy
Loi u ra AC/DC 2 dy
Loi u ra DC 2 dy c cc
Loi u ra DC 2 dy khng cc 839:19 AM
Cch s dng? Cch Mc Cm Bin Loi 2 Dy Vi PLC
Loi AC 220V
Loi DC 24V
COM 01 02
PLC
~
Relay24VDC
COM 01 02
PLC
Relay24VDC
24VDC
220VAC
849:19 AM
Cch s dng?
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8/20/2015
22
Cc Loi u Ra Cch Mc Ti
Loi DC 3 dy NPN Loi DC 3 dy NPN cc C h
Loi DC 3 dy PNP cc C h
859:19 AM
Cch s dng?
Cch Mc Cm Bin Vi PLC
COM
01 02
out
Loi DC 3 dy NPN
PLC
COM
01 02
PLC
Loi DC 3 dy PNP
24VDC
24VDCout
869:19 AM
Cch s dng?
Cc loi cm bin ca Omron
879:19 AM
Mt vi loi cm bin? Cc loi cm bin ca Omron
889:19 AM
Mt vi loi cm bin?
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8/20/2015
23
NG DNG CM BIN T
899:19 AM
NG DNG CM BIM T
Kim tra v tr ca sn phm M sn phm909:19 AM
Phn tch v gii thch cc ng dng?
NG DNG CM BIM T
Cng nghip ng gi Cng nghip du m
919:19 AM
Phn tch v gii thch cc ng dng? APPLICATION
OMRON SOLUTION
NHN BIT GIA V TRONG GI NHM
Cc gi gia v hoc thuc c a vo cc gi bng nhm l. Cn kim tra xem c gia v trong gi cha?
S dng sensor tim cn c u ra analog (4 20mA) v b x l tn hiu thng minh K3- tnh rng. T c th bit c l c gia v trong gi nhm l cha.
E2CA
Heat Sealing
OK NG
929:19 AM
Phn tch v gii thch cc ng dng?
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8/20/2015
24
APPLICATION
OMRON SOLUTION
PHT HIN GI GIY CHNG LN NHAU
Cc gi giy hay chng ln nhau. Lm sao pht hin?
E2C-T l loi cm bin tim cn c b khuych i ri c chc nng Teach.Chng ta c th set c chnh xc v tr im cn cm bin. Sensor c th phn bin c khong cch nh ti 0.1mm.
sensor
939:19 AM
Phn tch v gii thch cc ng dng?
APPLICATION
OMRON SOLUTION
PHT HIN LON BNG NHM HOC THP
Pht hin cc lon khi ang di chuyn trn dy chuyn trnh in thiu bng my in.
E2EV. Tt c cc loi sensor tim cn bng kim loi u c th pht hin c s c mt ca cc lon mt cch chnh xc. Khong cch o ca sensor c th c t ti 10 mm.
949:19 AM
Phn tch v gii thch cc ng dng?
APPLICATION
OMRON SOLUTION
PHT HIN NP NHM TRN CHAI
Pht hin np nhm mng trn chai nc
E2CY-C2A l sensor tim cn chuyn pht hin vt th bng nhm vi tin cy cao. Rt d ci t sensor, ch cn n nt TEACH trn b khuch i.
959:19 AM
Phn tch v gii thch cc ng dng?
Chn Cm Bin Tim Cn Nhng iu Cn Lu
1. Vt Cm Bin (Object):
2. Hnh dng Sensor:
a. Vt liu, kch c vt:
Vt lm bng vt liu g?
Hnh dng ?
Kch c nh th no?
b. B mt ca vt:
B mt ca vt
c m khng?
969:19 AM
-
8/20/2015
25
Chn Cm Bin Tim Cn - Nhng iu Cn Lu
3. nh Hng Mi Trng Xung Quanh:
Vt cm bin
Kim loi xung quanh
4. Tn S p ng (Response Frequency):
979:19 AM
Chn Cm Bin Tim Cn - Nhng iu Cn Lu
5. nh Hng Mi Trng Xung Quanh:
6. Khong Cch Cm Bin (Sensing Distance):
Nhit cao
Rung ng mnh m cao,
Khong cch t cm bin ti v tr vt bng 70% 80% khong cch pht hin 70% 80%
100%
989:19 AM
Chn Cm Bin Tim Cn - Nhng iu Cn Lu
7. Tc ng Gia Cc Sensor Vi Nhau:
Khi gn 2 cm bin tim cn gn nhau, hy xem xt n tc ng tng h gia chng
999:19 AM
2. CM BIN IN DUNG (Capacitive Sensor)
1009:19 AM
-
8/20/2015
26
Cm Bin Tim Cn
Cm ng in Dung
1019:19 AM
Hnh dng?
Cm Bin Tim Cn
Cm ng in Dung
1029:19 AM
Hnh dng?
Vt Cm Bin
Nguyn Tc Hot ng:
Pht hin theo nguyn tc tnh in (s thay i in dung gia vt cm bin v u sensor), c th pht hin tt c vt
Cm Bin Tim Cn
Cm ng in Dung
1039:19 AM
Gii thch nguyn l hot ng?
Cm Bin Tim Cn
Cm ng in Dung
B phn cm bin (cc bn cc(in cc) cch in)
Mch dao ng Mch ghi nhn tn hiu Mch in ng ra
1049:19 AM
Gii thiu cc b phn - cu to?
-
8/20/2015
27
NGUYN L HOT NG
CM BIN IN DUNG
1059:19 AM
Cu to?
NGUYN L HOT NG
T in gm hai bn cc bng kim loi t cch nhau qua vt liu in mi.
Cm bin dung l t in m: gm hai bn cc t hng ra pha trc nh hnh
CM BIN IN DUNG
1069:19 AM
Cu to gii thch?
NGUYN L HOT NG
CM BIN IN DUNG
1079:19 AM
S thay i sng ra?
NGUYN L HOT NG
B mt cm binl mt bn cc.Khi c in pxoay chiu tvo b mt to ramt in trngbin thin.in p ny lyim t nhmc chun Khng c vt th gia in cc
CM BIN IN DUNG
1089:19 AM
Gii thch nguyn l hot ng?
-
8/20/2015
28
NGUYN L HOT NG
0 : Hng s in mi chn khng
mF /10.854187.8 120
r : Hng s in mi gia hai bn cc.
in dung t in:
d
AC r
0
CM BIN IN DUNG
1099:19 AM
Gii thch nguyn l hot ng?
NGUYN L HOT NG
Nu khng c vt th gia hai bn cc.
;1r dA
C 0
Nu gia hai bn cc tn ti vt th khng dn in:
d
AC r
0
Khi c vt th gia hai bn cc th:
1rDo s tng gi tr ca C c s dng pht hin vt th.
C tng
CM BIN IN DUNG
1109:19 AM
Gii thch nguyn l hot ng?
NGUYN L HOT NG
Nu vt th gia hai bn cc dn in
V mi trng gia hai bn cc l khng kh nn:
ed
AC r
0
ed
ACr
01
S c mt ca vt dn in gia hai bn cc cng lm in dung tng
CM BIN IN DUNG
1119:19 AM
Gii thch nguyn l hot ng?
NGUYN L HOT NG
Pht hin mc nc bn trong bnh
Trong trng hp incc th hai cch ly vimt t.
Nguyn tc nh cctrng hp trn.
Cn tm ng lin ktbn cc vi im nit.
CM BIN IN DUNG
1129:19 AM
Gii thch nguyn l hot ng?
-
8/20/2015
29
NGUYN L HOT NG
Nu khng c ng ni t cho bn cc th 2.
in cc t ni trctip trn b mt cmbin
iu ny to ra mtin trng c lp viim cc t.
CM BIN IN DUNG
1139:19 AM
Gii thch nguyn l hot ng?
Cp kt ni
Nt iu chnh
Led ch bo
B mt tc ng
in cc tip ngun
in cc tip t
Vng cm nhn
Dng phthin cc loivt th chng s inmi ln hnkhng kh:Nha, thytinh, g, kimloi,...
CU TO
CM BIN IN DUNG
1149:19 AM
Gii thch cc b phn?
VT CN
HOT NG
CM BIN IN DUNG
1159:19 AM
Gii thch nguyn l hot ng?
HOT NG
CM BIN IN DUNG
1169:19 AM
Gii thch nguyn l hot ng?
-
8/20/2015
30
HOT NG
CM BIN IN DUNG
1179:19 AM
Gii thch nguyn l hot ng?
HOT NG
CM BIN IN DUNG
1189:19 AM
Gii thch nguyn l hot ng?
Pht hin c cc vt c hng s in mi ln hn hng s in mi khng kh
iu chnh c nhy
B nh hng bi tc ng ca mi trng xung quanh (bi, khi)
HOT NG
CM BIN IN DUNG
1199:19 AM
Lu ?
HOT NG
CM BIN IN DUNG
1209:19 AM
V d?
Cm bin cha tc ng
-
8/20/2015
31
Mc cht lng cn di mc nh hng ca cm bin
HOT NG
CM BIN IN DUNG
1219:19 AM
V d?
Cm bin tc ng
HOT NG
CM BIN IN DUNG
1229:19 AM
V d?
C th pht hin st, kim loi, nha, nc, si, g,
Tui th di v tinh cy cao. C mch bo v chng ni ngc cc ngun. D dng iu chnh khong cch bng
volume. iu chnh c nhy bn trong. C th kim tra tnh trng hot ng bi ch
th LED . D dng kim tra mc v v tr.
C IM CHUNG
CM BIN IN DUNG
1239:19 AM
Gii thch cc c im sau?
Kch thc ca in
cc ca cm bin.
Vt liu v kch thc
i tng.
Nhit mi trng.
i tng tiu chun
v hng s in mi
CM BIN IN DUNG
YU T NH HNG N TM PHT HIN
1249:19 AM
Gii thch cc nh hng sau?
-
8/20/2015
32
U IM C th cm nhn vt dn in v khng dn
in. Tnh cht tuyn tnh v nhy khng ty thuc
vo vt liu kim loi. N c th cm nhn c vt th nh, nh. Vn tc hot ng nhanh. Tui th cao v n nh cng cao i vi
nhit .
CM BIN IN DUNG
U NHC IM
1259:19 AM
Phn tch cc u im sau?NHC IM
B nh hng bi m
Dy ni vi sensor phi ngn in dung
dy khng nh hng n b cng hng
ca b dao ng.
CM BIN IN DUNG
U NHC IM
1269:19 AM
Phn tch cc nhc im sau?
NG DNG CM BIN IN DUNG
1279:19 AM
NG DNG CM BIM IN DUNG
Trong cng nghip thc phm o mc cht lng
1289:19 AM
Phn tch cc ng dng?
-
8/20/2015
33
NG DNG CM BIM IN DUNG
Ch bin g Kim tra b ni truyn ng
1299:19 AM
Phn tch cc ng dng?
Cm Bin Tim Cn Cm ng in Dung
Cc Loi Thng Dng
bt
Cht lng
E2KQ-X10ME1
Dy ra
iu chnh nhy
E2KQ : o mc cht lng
Khng b nh hng bi bt kh nh chnh c nhy ca sensor
E2K-L : o mc cht lng
Khng b nh hng bi mu ca ng nha hay mu ca cht lng
1309:19 AM
Gii thch?
APPLICATION
OMRON SOLUTION
PHT HIN SA / NC TRI CY BN TRONG HP
Pht hin c sa / nc tri cy bn trong hp giy
E2K-C l sensor tim cn cng sut ln v c th pht hin c cht lng bn trong hp hay khng.
E2K
1319:19 AM
Gii thch?
Chun IP:
IP
Mc bo v nc v cc vt rn tc ng t bn ngoi, da theo chun ca IEC (International Electrotechnical Commission)
(Bo v s thm nhp ca nc)
(Bo v cc vt rn tc ng t bn ngoi)
Mc bo v ca ch s th 1
Bo v thit b khi nh hng bi
6
Bo v chng khi bi m bo khng lm nh hng n hot ng ca thit b
5
Bo v chng va chm vi vt c ln hn 1mm
4
Bo v chng va chm vi vt c ln hn 2.5mm
3
Bo v chng va chm vi vt c ln hn 12.5mm
2
Bo v chng va chm vi vt c ln hn 50mm
1
Khng bo v0
S dng c nu nhng vo trong nc 8
Khng b nc thm vo nu nhng vo nc (trong mt s trng hp nht nh)7
Khng b nc thm vo nu c tc ng ca tia nc bn mnh trc tip t bt c hng no t xung quanh
6
Khng h hi nu c tc ng ca tia nc bn mnh trc tip t bt c hng no t xung quanh5
Khng h hi nu c tia nc vng vo t bt c hng no
4
Khng h hi nu c tc ng ca nc ri t pha trn xung (theo hng 60 so vi phng thng ng)
3
Khng h hi nu c tc ng ca nc ri t pha trn xung (theo hng 15 so vi phng thng ng)
2
Khng h hi nu c tc ng ca nc ri t pha trn xung (theo hng thng ng)
1
Khng bo v 0
Mc bo v ca ch s th 2
1329:19 AM
Gii thch?
-
8/20/2015
34
1339:19 AM