bao cao vdk nhom 2

H thng cn kim xut nhp kho thc n chn nui trong nh my

LI M UK thut vi x l v vi iu khin vi tc pht trin nhanh v ang mang n nhng thay i to ln trong khoa hc v cng ngh cng nh trong i sng hng ngy.nh k thut vi x l v vi iu khin m my mc tr nn thng minh hn,thc hin c nhng cng vic i hi chnh xc cao,em li hiu qu kinh t cao Ngy nay vic ng dng vi iu khin, vi x l ang ngy cng pht trin rng ri v thm nhp ngy cng nhiu vo cc lnh vc k thut v i sng x hi. Tuy nhin ng dng cho cc h thng ngy nay khng n gin ch dng li iu khin n nhp nhy, m s ngi vo/ra, hin th dng thng bo trn matrix led hay iu khin ON-OFF ca ng c m n ngy cng c ng dng rng ri. V vi xu hng tt yu ny cng vi s pht trin mnh m ca cng ngh ch to vi mch, ngi ta to ra nhng vi iu khin c cu trc mnh hn, p ng thi gian thc tt hn, chun ha hn vi x l ngy cng c ng dng rng di, phc v con ngi tt hn. Vi ti phn tch v xy dng h thng cn kim xut ,nhp kho thc n ca nh my thc n gia sc .Nhm chng em tuy ch trong c khong thi gian ngn hng ch nhng cng tm hiu c nhng phn chnh trong h Chng em xin cm n thy gio H Vn Phng bo tn tnh gip chng em hon thnh bo co ny. Mc d c gng ht sc v do cn hn ch trong vic t tip xc vi cng ngh bn ngoi nn chc chn trong qu trnh lm bi e s c nhng thiu st. Mong nhn c s nhn xt nh gi qu bu ca Thy! Chng em xin chn thnh cm n!1

GVHD : Th.S H VN PHNG


PHN TCH CNG NGHNHP KHO-->NGUYN LIU TH -> NGHIN TH -> NGHIN TINH -> PHI TRN -> TO HNH -> SY, TIT TRNG -> LM NGUI -> NG BAO ->XUT KHO

M t s qua cng ngh sn xut thc n- Cng ngh ch bin thc n chn nui thc hin trn dy chuyn thit b c c gii ha cao, gn, ph hp vi quy m nh, khng gy nhim mi trng. Thc n c sn xut t nguyn liu c sn trong nc, c b sung cc ch phm sinh hc t sn xut, kch thch vt nui n ngon, mau ln. - Nguyn liu dng ch bin thc n gia sc c cp vo t 2 nhnh: + Nhnh 1 nguyn liu dng ht c cp ln thng cha qua my lc st v xung my nghin sau khi nghin xong c ua ln thng cha bt c m ha trong my tnh v iu khin u chia vo cc thng + Nhnh hai nguyn liu dng bt c cp vo cc thng thng qua u chia .Sau khi nguyn liu y cc thng nhin liu c a v thng cn t ng theo cng thc v thc n c np sn trong my tnh (cn tch ly t ng) cn xong c x t ng xung my trn.cng lc cc thnh phn vi lng c my trn tin hnh khi trn v cp ln thng cha, a xung thng cn,my trn c lm vic theo chng trnh ci t sn, trn xong c x v a ln thng cha c cn ng bao t ng (nu lm thc n dng bt) nu lm thc n dng vin th bt sau2



khi trn xong a vo thng cha p vin.Vin p xong c sy v lm mt vi m ph hp nu cn lm thc n mnh th cho qua my b vinsng phn loi v a v thng ng bao t ng . S KHI H THNG. T yu cu v quy trnh h thng ta xy dng c s khi cho m hnh H thng nh sau :

i tng

Cm Bin

Mch K

C cu chp hnh

Trong : - i tng l khi lng ca t ch hng ( thc n chn nui ) - Cm bin c nhim v bin i tn hiu analog ri a v tn hiu in p. - Mch iu khin bao gm b bin i ADC v vi iu khin 8051 , c tc dng nhn tn hiu t cm bin ,bin i,x l v a ra c cu chp hnh. - C cu chp hnh l My tnh, hin th v lu li gi tr hng xut, nhp.

3


H thng cn kim xut nhp kho thc n chn nui trong nh my Xy dng m hnh h thng,chn cc thit b v chc nng

Nguyn l lm vic-

Nhp kho : Khi t ch hng vo kho khi s i qua h thng cn kim tra tng khi lng ca t khi s tc ng trc tip n cm bin loadcell, sau khi khuych i tn hiu in p c chuyn v b bin i tn hiu tng t s ADC qua b bin i ny tn hiu s c chuyn vo vng nh ca vi iu khin 8051 gi tr ny c lu li trong vi iu khin 8051( gi tr P1)

-

Khi nhp hng vo kho, t quay tr ra, lc ny t i qua trm cn, tng t nh trng hp trn cm bin xut tn hiu tng t l gi tr in p v qua b chuyn i ADC tn hiu s s c chuyn vo vng nh ca vi iu khin ( gi tr P2)

-

Nh vy vi iu khin s thc hin vic tr : P1 P2 = P.4



- Khi tnh ton c lng hng P khi vi iu khin xut d liu vo my tnh, chnh l s lng thc n gia sc nhp vo kho thng qua giao din c thit k bng Visual Basic hoc C++. -Trng hp xut kho thc n th thc hin theo chu trnh ngc li khi lng thc n xut kho P= P2-P1 H THNG THIT K C KH- SN CN V MCH IN T La chn sn cn theo cu trc v quy m ca nh my sn xut thc n chn nui, y ta gi thit loi t hay dng ch hng khong 5-8 tn v lng hng mi ln nhp xut khng ln hn 5 tn, trong trng hp nh my c th th ta cn tnh ton chi tit v chnh xc hn nhm mc ch tit kim tin u t cho h thng. 1.La chn sn cn (Platform ) - c thit k v ch to ti Vit Nam Ti nh xng cng ty ng Dng - Kch thc sn ngoi: 3,4m x 16m - Kh nng chu ti: 10.000kg - 25.000kg - Kh nng chu qu ti an ton: 150% - Dm chnh: I 600 - Dm Ngang: I 200 - Kt cu: cn ni hai dc - Vt liu dng ch to: thp nhp ngoi trc tip, mt sn cn c lin kt vi cc dm thp chu lc. Cc dm chu lc c gia c ti a m5


H thng cn kim xut nhp kho thc n chn nui trong nh my bo kh nng chu ti tt. -Sn cn c sn 02 lp sn bo v (chng g) v 01 lp sn mu bn ngoi (s dng loi sn AXPO) - Sn cn c thit k chng giao ng 4 gc.

+ Kt cu phn b tng : Dng vi cng trnh c nh, khung dm thp sn b tng lin kt cng dm bo cng ca cng trnh

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H thng cn kim xut nhp kho thc n chn nui trong nh my +Kt cu sn thp: - Bn cn c ch to hon ton bng thp kt cu d tho lp v di chuyn c.Sn c lm bng thp gai dm bo chng trn trt.sn cn c lp t ni hoc chm ty thuc vo a hnh v khng gian t bn cn + H mng cn: - Mng cn c nh hng ln n n nh lu di ca cn ,phn mng cn c b tng vng chc ty theo ti trng ca cn, m bo cho cu cn c an ton cao. 2. La chn loadcell Load cell l thit b in dng chuyn i lc thnh tn hiu in. Hot ng da trn nguyn l cu in tr cn bng Wheatstone. Gi tr lc tc dng t l vi s thay i in tr cm ng trong cu in tr, v do tr v tn hiu in p t l.

7


H thng cn kim xut nhp kho thc n chn nui trong nh my Phn loiC th phn loi loadcells theo: - Phn loi Loadcell theo lc tc ng: chu ko (shear loadcell), chu nn (compression loadcell), dng un (bending), chu xon (Tension Loadcells) ... - Phn loi theo hnh dng: dng a, dng thanh, dng tr, dng cu, dng ch S

Tm hiu Loadcells tng t v Loadcells s.8


H thng cn kim xut nhp kho thc n chn nui trong nh my Trc y, hu ht cc thit b cn trong cng nghip s dng load cell cm bin sc cng, bin i thnh tn hiu in (gi l load cell tng t). Tn hiu ny c chuyn thnh thng tin hu ch nh cc thit b o lng nh b ch th. - Mt h thng cn dng load cell tng t in hnh thng thng bao gm mt hoc mt vi load cell ni song song vi nhau qua mt hp ni (Junction Box)- Mi load cell ti mt u ra c lp, thng 1 n 3 mV/V. u ra kt hp c tng hp da trn kt qu ca u ra tng load cell. Cc thit b o lng hoc b hin th khuych i tn hiu in a v, qua chuyn i ADC, vi x l vi phn mm tch hp sn thc hin tnh ton chnh nh v a kt qu c c ln mn hnh. a phn cc thit b hay b hin th hin i u cho php giao tip vi cc thit b ngoi khc nh my tnh hoc my in. u im chnh ca cng ngh ny l xut pht t yu cu thc t, vi nhng tham s xc nh trc, s c cc sn phm thit k ph hp cho tng ng dng ca ngi dng. cc phn t cm ng c kch thc v hnh dng khc nhau ph hp vi yu cu ca ng dng. Cc dng ph bin: dng ko (shear), dng un (bending), dng nn (compression) Tuy nhin, kh khn gp phi ngay t bui u ca cc h thng ny l tn hiu in p u ra ca load cell rt nh(thng khng qu 30mV). Nhng tn hiu nh nh vy d dng b nh hng ca nhiu loi nhiu trong cng nghip nh:

Nhiu in t: sinh ra bi qu trnh truyn pht cc tn hiu in trong9


H thng cn kim xut nhp kho thc n chn nui trong nh my mi trng xung quanh, truyn pht tn hiu v tuyn in trong khng gian hoc do qu trnh ng ct ca cc thit b chuyn mch cng sut ln S thay i in tr dy cp dn tn hiu: do thay i tht thng ca nhit mi trng tc ng ln dy cp truyn dn. Do , h thng chnh xc th cng rt ngn khong cch gia load cell vi thit b o lng cng tt. Cch gii quyt thng thng vn dng l gim thiu dung sai u ra ca load cell. Tuy nhin gii hn ca cng ngh khng cho php vt qu con s mong mun qu nh. Trong khi ni song song nhiu load cell vi nhau, mi load cell ti vi mt u ra c lp vi cc load cell khc trong h thng, do m bo gi tr c nht qun, n nh v khng ph thuc vo v tr, h thng yu cu chnh nh u ra vi tng load cell ring bit.Tn hiu ra chung ca mt h nhiu load cell da trn c s u cc tn hiu ra trun bnh ca tng load cell. iu gy nn d xy ra hin tng c load cell b li m khng c nhn bit. Mt khi nhn ra th cng kh khn trong vic xc nh load cell no li, hoc kh khn trong yu cu s dng ti kim tra, hay yu cu s dng cc thit b o lng nh ng h volt-ampe vi chnh xc cao, c bit trong iu kin nh my ang hot ng lin tc. Thc t cn rt nhiu yu t khc lin quan n chnh xc ca h thng cn nh: - Qu trnh chnh nh h thng. - Nhiu rung v n. - Do tc dng chuyn hng lc trong cc c cu hnh ng.

- Qu trnh phn tch d tm li. - Thay th cc thnh phn trong h thng cn hoc cc h thng10


H thng cn kim xut nhp kho thc n chn nui trong nh my lin quan.- i dy cp tn hiu di. - Mi trng hot ng qu kn ... - Khng th tnh ton c trc cc yu t nh hng ny c th m hnh ha trong qu trnh phn tch v thit k. Trong khi iu kin lm vic mi ni rt khc nhau, thit b o cch xa cm bin, tn hiu truyn dn yu, d b tiu hao v nhiu loi nhiu tc ng, c bit vi mi trng lm vic khc nghit trong nh my v x nghip. Tn hiu a v n thit b o lng kh phn nh trung thc gi tr thc t. Trong khi , cc b hin th hin nay thng dng h vi x l tc thp, nng lc tnh ton khng cao, t thit b tch hp cc thut ton x l chnh nh cc s liu thu thp v, hoc nu c cn mc n gin. Do cc b hin th s dng vi nhiu loi load cell khc nhau nn cc thut ton chnh nh ch mang tnh tng i, khng trit , c bit l cha c thit b no tch hp tnh nng b sai lch do nhit . Chc nng lc nhiu in t trng cho tn hiu o ca cc thit b ny cn rt km. Mt yu im na l tn s ly mu thp, do khng th p dng trong cc ng dng m lc tc dng bin i nhanh (cn ng) nh cc h thng cn bng lin tc, Tuy nhin, t cui nhng nm 1970, cc nh ch to load cell khm ph kh nng c th kt hp gia cng ngh in t hin i vi cc thnh phn o c bn, v khi nim load cell s ra i. Ban u, khi khi nim load cell s mi ra i, nhiu ngi hiu lm l cc load cell s c cc phn t in tiu hao thp c th c s dng chuyn i mt load cell cht lng thp ln mt load cell cht lng cao. Thc t th ngc li, mi load cell s n gin cng mang trong n mt cu trc kh phc tp. Th nht, phi c mt load cell c bn vi chnh xc, n dnh v kh nng lp li rt cao11


H thng cn kim xut nhp kho thc n chn nui trong nh my trong mi iu kin lm vic. Th hai, phi c mt b chuyn i tng ts (ADC) 16 n 20 bit tc cao chuyn i tn hiu in tng t sang dng s. Th ba, phi c h vi mch x l thc hin iu khin ton b qu trnh chuyn i t tn hiu lc o c thnh d liu s th hin trung thc nht v giao tip vi cc thit b khc trao i thng tin. -Tn hiu in p t cu in tr ca load cell chnh xc cao c a n u vo ca mch tch hp sn, bao gm c phn khuych i, b gii iu ch, mt ADC tc cao 20 bit v b lc s. Mt cm bin nhit tch hp sn c s dng o nhit thc ca load cell phc v cho vic b sai s do nhit . D liu t ADC, cm bin nhit cng vi cc thut ton trong phn mm v mt s phn cng b sung tch hp sn c chc nng ti u ha x l cc sai s do khng tuyn tnh, b sai ng c tnh, kh nng phc hi trng thi v nh hng ca nhit c vi x l tc cao x l. D liu kt qu u ra c truyn i xa qua cng giao tip theo mt giao thc nht nh. Cc module in t ny c th c t ngay trong loadcell, load cell cable hoc trong hp junction box. Cc c tnh ti hn ca tng load cell c t trong EEPROM nm trong module ca load cell , iu cng c ngha l mi vn x l sai s c thc hin ngay ti load cell, vi chnh load cell , cng c ngha l php b sai s c thc hin kh trit .

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La chn loadcellLoadcell VLC-A121 ( s lng l 4 loadcell )

Ti trng : 15T - chnh xc cao. - c lm bng hp kim nhm khng g, ph hp s dng trong mi trng cng nghip kh khn nht - Loadcell VMC ALC-A121 c thit k p ng nhng yu cu c chnh xc cao - Thit k ph hp vi nhiu cng trnh, d n v cc loi cn thng dng khc nh cn xe ti, cn sn cng nghip nng

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H thng cn kim xut nhp kho thc n chn nui trong nh my Ti trng Loadcell VMC VLC-A 121 Vt liu in p bin i Zero Balance Creep Error lp li in p u vo in p u ra Nhit mi trng Nhit hoc ng Temperature Effect On Output Temperature Effect On Zero Qu ti an ton Qu ti ti a di dy tn hiu t cht lng Kch thc ti a sn cn S dng Phng thc kt ni m %Load/10 %RO/10 %of rat.cap. %of rat.cap. cm mV/V %RO %RO %RO T 15T Thp 2.0 mV/V0.2% 1% 0.03 0.03 770 40 700 5 -10 ~ 40 -20 ~ 60 15 PPM/C 26 PPM/C 150 300 5m IP 67 2m-24m Cn in t xa ti, cn sn Red-Input (+), black-Input (-)green-Output (+),whiteOutput(-)

La chn hp ni Junction Box14


H thng cn kim xut nhp kho thc n chn nui trong nh my -Mi loadcell xut xng ko th no ging nhau (v tn hiu ra) hon ton, nn phi c mt thit b J-box iu chnh v ni chung cc loadcell v 1 ng ra duy nht a v b ch th. -H thng cn dng 4 load cell do ta cn dng 1 hp ni Junction box ni cc loadcell song song vi nhau.

Hp Ni KELI TNH NNG HP NI: - ng dng : Dng ni cc loadcell li cho cn dng nhiu hn 1 Load cell - S dng cho Cn Sn,Cn Bn, Cn Xe t. - Kt ni 4 loadcell - V lm bng INOX hot ng tt trong mi trng khc nghit

Mch in t15


H thng cn kim xut nhp kho thc n chn nui trong nh my Do trong th vin ca Proteus khng c loadcell nn em ly ngun p m phng thay th cho loadcell. Thc t tn hiu ra ca load ch khong vi chc mV m u vo ca ADV0808 l in p mt chiu (0-5V ) nn khi lm mch thc t phi c thm b khuych i p.

TNH TON KT QU O.16


H thng cn kim xut nhp kho thc n chn nui trong nh my Khi lng Nu Nu Nu 0T (0mV) 15T(30mV) x T(xmV) u ra khuych i 0V 5V U(V) u ra ADC 00H FFH Nx

Vy t trn ta c x = 15*Nx / 255 Kt lun khi lng cn cn c o bng cch c gi tr Nx sau tnh nh sau :

KL = 15.Nx/255 Lu thut ton : Chng trnh bao gm cc phn sau : + c s liu o + Tnh ton kt qu o + Chuyn s liu o sang BCD

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H thng cn kim xut nhp kho thc n chn nui trong nh myo U

Re ad _d ata

c s liu o Nx Tnh kt qu KL

Chn knh

Khi ng ADC

Chuyn U sang BCD

M m ADC

Hin th kt qu o

c s liu o

ng m ADC


Re tLU THUT TON

Re t18

H thng cn kim xut nhp kho thc n chn nui trong nh my;KHAI BAO CAC BIEN SO HANG SO D0 EQU 50H ;D0,D1 TINH TOAN UH EQU 55H; DIEN AP DO SAU KHI DA TINH TOAN DEGIT EQU 57H; ;CHUONG TRINH KHOI TAO ORG 100H; ,D2 CHUA GIA TRI BCD CUA DIEN AP D1 EQU 51H; D2 EQU 52H; Nx EQU 53H; DIEN AP DOC TU ADc UL EQU 54H; DIEN AP DO SAU KHI DA NUM EQU 56H DIGIT EQU 57H ; KHAI BAO CAC BIEN CHO CHUONG TRINH CON ZOV EQU 00H XL EQU 60H XH EQU 61H YL EQU 62H YH EQU 63H ZL EQU 64H ZH EQU 65H ZO EQU ZL Z1 EQU XH 19


H thng cn kim xut nhp kho thc n chn nui trong nh myZ2 EQU 66H Z3 EQU 67H DIGIT 0 EQU 68H DIGIT 1 EQU 69H DIGIT 2 EQU 6AH DIGIT 3 EQU 6BH DIGIT 4 EQU 6CH ;DO DIEN AP CLR TF2; XOA CO BAO NGAT LCALL READ_DATA; DOC SO LIEU DO LCALL CALCULATOR; TINH TOAN KET QUA DO XH, MOV XH,UH MOV X,UL LCALL HEXTOBCD;CHUYEN DOI SANG BCD

READ_DATA: CLR P3.0 ; CHON KENH IN0 CLR P3.1 CLR P3.2 SETB P3.4 ;KHOI DONG ADC NOP NOP CLR P3.4;20


H thng cn kim xut nhp kho thc n chn nui trong nh my LCALL DELAY; TRE 100MS SETB P3.3; MO DEM ADC MOV Nx,P1; DOC SO LIEU TU ADC CLR P3.3 ; DONG DEM ADC RET ; KET THUC CALCULATOR: MOV A,Nx MOV B,6 MOV YL,#0AH LCALL DIV16 MOV DIGITO, MUL AB MOV UL,A MOV UH,B HEXTOBCD ;CHUONG TRINH CON SANG BCD MOV YH,#00H Z0 MOV XH,Z3 MOV XL,Z2 LCALL DIV,16 MOV DIGIT1,Z0 MOV XH,Z321


H thng cn kim xut nhp kho thc n chn nui trong nh my MOV XL,Z2 LCALL DIV,16 MOV DIGIT2,Z0 MOV XH,Z3 MOV XL,Z2 LCALL DIV,16 MOV DIGIT3,Z0 MOV XH,Z3 MOV XL,Z2 LCALL DIV,16 MOV DIGIT4,Z0 RET END

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bao cao vdk nhom 2

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