High precision thiab ntse hluav taws xob multihead weighter

Author: Smartweigh-Multihead Weighter

1 Kev Taw Qhia Nrog txoj kev loj hlob sai ntawm cov khoom siv hluav taws xob tam sim no thiab cov ntaub ntawv xov xwm hluav taws xob, cov tshuab hluav taws xob ntau lub taub hau tau siv dav hauv ntau yam kev lag luam thiab kev lag luam. Cov dej num ntawm cov mis thiab lwm yam kev ua haujlwm tau zoo siab heev los ntawm cov neeg siv khoom. Tus yuam sij ntawm cov ntse hluav taws xob ntau lub taub hau hnyav yog tsim los ntawm ob qhov kev ua haujlwm loj.——Kev tshuaj xyuas thiab kev ua cov ntaub ntawv thiab cov nplooj ntawv human-computer interaction technology yog tsim los ntawm kev tshuaj xyuas thiab cov txheej txheem ua cov ntaub ntawv. Cov txiaj ntsig ntsuas tau tshwm sim nyob rau hauv kev tswj hwm ntawm txhua tus, xws li cov ntaub ntawv thiab luam tawm. Cov kab lus feem ntau qhia txog kev tshuaj xyuas ib feem ntawm qhov system software hauv kev nthuav dav, suav nrog kev ntsuas tsis siv neeg ntawm lub zog hluav taws xob ntawm lub sensor. Tsim cov tswv yim sensor calibration teb thiab nws dual cpu nruab nrab ua haujlwm. 2 System zuag qhia tag nrho txoj kev tsim kev sib txuas lus. Tus yuam sij rau kev tshawb fawb txog kev tshawb fawb yog txoj hauv kev los ua kom tiav qhov system software ntse system. Lub multihead weighter xyuas qhov system yog tsim los ntawm sensor ua haujlwm amplifier, cov ntaub ntawv tau txais (analog / digital hloov dua siab tshiab) fais fab mov Circuit Court, nruab nrab tswj cov khoom, tawm tswv yim fais fab mov Circuit Court, nyiaj them rau sab nraud thiab hloov fais fab mov daim ntawv thov.

Kev ua haujlwm ntawm lub zog hluav taws xob hluav taws xob yog hloov pauv tus lej tus nqi hnyav nrog tus lej me ntsis sib txawv ua haujlwm voltage raws li qhov kev tiv thaiv kab mob ntsuas kis tau tus mob, thiab nthuav nws mus rau cov ntaub ntawv ua haujlwm voltage tau txais los ntawm qhov tsim nyog analog / digital conversion processing nti. Lub teeb liab thiab nqa tawm A / D hloov dua siab tshiab, qhov kev ua yuam kev ntawm lub ntsuas vaj huam sib luag yog feem ntau tshwm sim los ntawm qhov no, yog li cov qauv tsim ntawm ntu no muaj feem xyuam rau qhov tseeb ntawm tag nrho cov system software. Lub chaw ua haujlwm hauv nruab nrab tsis yog lub luag haujlwm rau kev ua haujlwm thiab kev ua haujlwm ntawm tag nrho cov txheej txheem software, thiab ua cov txheej txheem ua cov ntaub ntawv, tsis siv neeg calibration, tsis siv neeg hloov pauv ntawm nws cov txheej txheem, teb lub tsev xa xov hluav taws xob hloov khoom siv hluav taws xob uas ua cov lus qhia thiab cov ntaub ntawv xa mus. hauv nruab nrab ntawm CPU ntawm nplooj ntawv system software. Lub tshuab hluav taws xob hloov hluav taws xob software muab cov khoom siv hluav taws xob zoo tshaj plaws thiab kev faib khoom rau kev ua haujlwm zoo ntawm qhov system software, thiab muab cov qib siab ntawm cov hluav taws xob txuas hluav taws xob hloov hluav taws xob. 3 Kev txhim kho kho vajtse Tus yuam sij rau kev txhim kho kho vajtse ntawm cov khoom siv hluav taws xob ntsuas hluav taws xob suav nrog 3 qhov chaw: kev ua haujlwm amplifier, analog / digital hloov hluav taws xob hluav taws xob hluav taws xob, CNC tshuab cuab yeej resistor Lub tshuab ua haujlwm sib xyaw ua haujlwm amplifier ua chip AD525C siv tau pom hauv daim duab 2. Cov zis kub drift ua hauj lwm voltage yuav tsum qis dua 25. Qhov kub thiab txias drift ua hauj lwm voltage yuav tsum qis tshaj qhov feem ntau rejection piv CMR, uas yog hais txog 90dB thaum lub dav dav nce ntau tshaj qhov loj discrete system. 0.003^ (thaum G=l). Raws li lub suab amplifier, AD524 muaj cov khoom siv siab-precision rau tt1WG = l, 10, 100 thiab 1000 tus pin-hom SI txheej txheem: ua rau JWRG2 kawg ntawm lub raj loj dua thiab txheeb ze tom qab tus lej xaiv tus pin txuas ua ntej (lub sijhawm no , RG1 tsis txuas nrog lub qhov ntswg), kev ua haujlwm ntawm kev nthuav dav ntawm tus txheeb ze magnification tuaj yeem ua tiav. Tshwj tsis yog rau hom kev sib txuam nrog, thaum tus nqi nce nqi yog los ntawm 1 txog 100.

Thaum qhov kev hloov pauv txuas ntxiv mus, AD524 kuj tseem muaj lwm txoj hauv kev los tswj tus nqi nce. Ib qho zawv zawg rheostat RG yog siv los txuas lub raj 3 (RG2) ntawm AD524 ua cov nti rau tus pin 16 (RGD), thiab tus nqi tsis kam coj mus rau G RG yog RG-40K / (G-l) 3.2 digital hloov hluav taws xob hloov hluav taws xob Circuit Court. Hauv cov qauv tsim no, 14-ntsis ntau S! analog/digital converter MAX194 tsim los ntawm MAXIM raug xaiv. Cov txheej txheem txheej txheem muaj capacitor-type DACSPWM, Sampling mouthpiece yas dhos, 10 calibration DACs, serial kev sib txuas lus thiab tswj tsis tau tsuas yog muaj cov yam ntxwv ntawm high-ceev kev khiav hauj lwm, siab precision, hwj chim noj, thiab lwm yam. cov linearity thiab offset sib txawv, uas tuaj yeem hloov kho yam tsis muaj kev hloov kho sab nraud. Khaws tag nrho 18 qhov kev ua yeeb yam ruaj khov nyob rau hauv qhov kev tso cai kub. Cov yam ntxwv ntawm kev sib txuas lus serial ua rau IB txuas mus rau feem ntau ntawm cov cim tswj boards tam sim ntawd, uas ua kom yooj yim heev rau cov txheej txheem software Circuit Court. Tsis tas li ntawd, nws simulates analog switching fais fab mov thiab cov ntaub ntawv hloov. Cov qauv ntawm cov khoom siv hluav taws xob sib cais kuj zoo heev txo qhov kev puas tsuaj ntawm cov ntaub ntawv-suab nrov coupling. Nws cov yam ntxwv tseem ceeb yog: lub vijtsam daws teeb meem yog 14 khoom: vim li cas rau qhov sib txawv ntawm qhov sib txawv ntawm qhov sib txawv yog 0.33%, thiab qhov sib piv ntawm cov ntaub ntawv teeb liab rau lub suab nrov ntxiv thiab poob ntas yog 82dB; 9. Thaum cov ntaub ntawv siv hluav taws xob ua haujlwm yog + 9V, thaum lub tswv yim ua haujlwm voltage hloov ntawm 0 mus rau 9V lossis 5 rau +9V, cov ntaub ntawv tso tawm ntim hloov ntawm OOOOH mus rau 3FFFH. Lub preprogrammed flow yog siv los tswj qhov kev hloov pauv ntawm nws cov nqi tsis kam. Lub tswv yim tsim no xaiv cov tsis-volatile CNC tshuab cuab yeej resistor X9241 tsim los ntawm Xicor Corporation, nrog rau 4 resistor arrays, txhua array suav nrog 63 resistor modules, nyob rau hauv nruab nrab ntawm txhua module thiab 2 nodes, muaj kais ntsiab lus uas yuav tsum tau browsed los ntawm lub luag module. Txoj hauj lwm ntawm kev rub lub module hauv array yog tswj los ntawm tus neeg siv khoom raws li ob-xaim serial tsheb npav qhov (socket), thiab cov ncauj lus kom ntxaws qhov chaw nyob ntawm lub cev tivthaiv yog A0 -A3 qhov tseem ceeb hauv qhov kawg kom txhais tau.——X9241 sib piv cov ntaub ntawv ntws tsom xam ntawm kev sib txuas lus nrog cov xwm txheej ntawm cov ncauj lus kom ntxaws chaw nyob hauv lub davhlau ya nyob twg. Thaum tag nrho 4 cov ncauj lus kom ntxaws qhov chaw nyob tau ua tiav, tog yuav teb nrog cov lus teb los qhia tias nws raug xaiv. Thiab txhua X9241 muaj 4 resistor arrays, yog li ob kab I / O ntawm CPU tuaj yeem ua haujlwm txog 64 resistor arrays nyob rau hauv tag nrho, thiab txhua qhov resistor array yog txuam nrog tus cab davhlau ya nyob twg (WCR) thiab plaub 8-ntsis sau npe chaw nyob, tag nrho cov uas tuaj yeem thauj khoom lossis nyeem los ntawm tus neeg siv khoom.

Cov ntsiab lus ntawm rub lub davhlau ya nyob twg suav nco (WCR) tswj qhov me ntsis JL ntawm lub davhlau ya nyob twg hauv cov resistor array. Hauv cov qauv kev hais kom ua ntawm X9241, ntxiv rau kev nyeem-sau lub peev xwm nco thiab cov lus txib kom hloov cov ntaub ntawv ntawm txhua lub cim xeeb, kuj tseem muaj cov lus txib uas yuav cia lub davhlau ya nyob twg (WCR) iS / rho tawm qhov tsawg kawg nkaus chav hais kom ua INC-WIPER , txhua zaus INC-WIPER raug tua, uas yog, lub davhlau ya nyob twg yuav txav mus rau ib qho ntawm 63 resistor modules, uas qhia tau hais tias tus qauv tsim ntawm xoom hloov qhov kev pab cuam ntws Ib qho yooj yim loj, 4 lub hauv paus ntsiab lus 1) Rov pib dua“Tom qab lub kaw lus software yog powered on, qhov kev daws teeb meem pib dua ua ntej. Yog tias tsis muaj qhov system hais kom ua los ntawm nplooj ntawv tswj hwm-tib neeg-khoos phis tawj kev sib cuam tshuam cov cuab yeej siv tshuab, lub kaw lus software yuav xub thauj cov lus nyob hauv EEPROM txhua lub sijhawm pib calibration, thiab ua kom paub tseeb. Tsis siv neeg qhib qhov tseem ceeb xws li qhov qub preset lossis txoj kev nyab xeeb channel, tus nqi hauv paus, thiab nce tau teeb tsa ua ntej qhov kev sib tw dhau los. Tom qab ntawd lub CPU muab cov lus txib kom hloov pauv ntau-channel analog hloov AD7502 mus rau plaub txoj kev nyab xeeb channel, thiab cov khoom siv hluav taws xob ① thiab ② ntawm cov cuab yeej thiab cov khoom siv amplifier AD524 yog luv luv, thiab CPU tswj qhov tsis kam ntawm CNC tshuab. cuab tam raws li lub pre-programmed system. Tus nqi tsis kam ntawm 10K resistor nyob rau hauv lub cuab yeej X9241 yog hloov, thiab tsis siv neeg xoom hloov ntawm lub programmable maub los nce nqi ntsuas khoom siv amplifier tau ua. 2) Kev hloov kho Sensor "Thaum tus neeg teb xov tooj txiav txim siab tias lub tshuab hluav taws xob ntau lub taub hau tsis muaj qhov thauj khoom, qhov ntsuas ntsuas xoom hloov kho tau txais raws li nplooj ntawv thev naus laus zis ntawm tib neeg-lub computer, thiab CPU lees txais cov ntaub ntawv xa los ntawm CPU ntawm tib neeg-lub computer. kev sib cuam tshuam technology nplooj ntawv raws li kev sib txuas lus serial. cov ntsiab lus, paub qhov txawv ntawm pab pawg neeg ntawm lub sensor uas yuav tsum tau hloov kho, kho qhov sib xws CNC tshuab cuab yeej resistor X9241, nqa tawm kev hloov kho thawj zaug thiab kev hloov kho zoo raws li, thiab lub zog hluav taws xob ua haujlwm txhua hnub ntawm tsis siv neeg xoom hloov ntawm lub sensor. 3) System software xoom hloov kho, Tom qab CPU kho qhov nce tus nqi amplifier thiab lub sensor (raws li qhov tsim nyog) ntawm lub programmable maub los, CPU sau cov nqi hluav taws xob ua haujlwm seem seem ntawm xoom taw tes raws li A / D converter MAX194 thiab khw muag khoom nws nyob rau hauv EEPROM * tos kom txog thaum txhua yam zoo li qub Thaum hnyav tus me nyuam, rho tus nqi no dua. "Yog hais tias ib puag ncig ib puag ncig hloov pauv zoo heev thiab CPU tsis tau txais qhov kev hloov kho xoom, tus neeg siv khoom tuaj yeem muab qhov kev hloov kho xoom txhua lub sijhawm thiab nyob qhov twg raws li nplooj ntawv sib tham ntawm lub tshuab, kom lub tshuab hluav taws xob multihead hnyav yuav raug ntsuas dua. Ntxiv rau, rau qhov xoom taw tes cov ntaub ntawv yuam kev tsim los ntawm A / D, MAX194 yuav kho qhov ruam ntawm A / D nyob rau hauv thawj 50ms ntawm txhua lub hwj chim rau. CPU tuaj yeem siv A / D converter MAX194 los nqa tawm. "Feem ntau hais lus, lub tshuab hluav taws xob multihead hnyav no muaj kev ua haujlwm ntawm qhov tsis siv neeg thiab lub sijhawm xoom hloov kho ntawm cov software zoo heev" los xyuas kom meej tias nws cov khoom hnyav hnyav ua haujlwm.#4) Sensor teb ua haujlwm. Nws muaj ib tug tshwj xeeb sensor teb muaj nuj nqi, uas ua rau lub system software muaj ib tug ntau heev 'ntau npaum li cas los ntawm ob peb kilograms mus rau kaum ob tons. Lub tshuab tseem ceeb yog programmable tswj. Thaum tus neeg muas zaub xaiv ib yam ntawm cov sensor nyob rau hauv lub ntsuas ntau yam raws li nws. daim ntawv thov lub hom phiaj, los yog thaum lub sensor raug hloov vim muaj tej yam tsis zoo (los yog hloov nyob rau hauv cov txheej txheem ntau lawm), cov kws tshaj lij ntawm engineering tej yaam num (los yog cov neeg siv khoom) tsuas yog yuav tsum tau txuas lub sensor nrog lub system software, raws li tib neeg-lub computer kev sib raug zoo. cov nplooj ntawv thev naus laus zis, qhov tseem ceeb ntawm cov lus txib thiab thaj tsam ntawm qhov chaw, thiab tso tus qauv KG lossis tuj tivthaiv (tsis muaj chaws) hauv qhov system software hnyav phaj, ces tus qauv A / D Lub converter digital nyeem tus nqi ntawm mV / kg lossis mV /t raws li tus nqi hauv paus thiab khaws cia rau hauv EEPROM ntawm qhov system software siv thaum hnyav.

Tsis tas li ntawd, CPU suav thiab qhia meej txog tus nqi nce ntawm qhov programmable maub los nce tus nqi ntawm cov cuab yeej thiab cov khoom siv amplifier AD524 raws li tus nqi hauv paus thiab qhov tseem ceeb ntawm kev ntsuas ntau yam kis tau los ntawm tib neeg-khoos phis tawj kev sib cuam tshuam technology software CPU. CPU ua haujlwm 2K resistor hauv digital potentiometer X9241. Ua kom lub programmable maub los nce tus nqi amplifier ua haujlwm raws li tus qauv nce tus nqi tshiab, thiab ua kom tiav qhov ntsuas thiab ntsuas qhov ntsuas qhov ntsuas ntawm lub transmitter. Ntxiv nrog rau qhov ntsuas qhov hnyav ntawm cov khoom hnyav, cov ntaub ntawv kuj tseem muaj ntau yam haujlwm xws li kev nyab xeeb channel teeb tsa, lub hauv paus tus nqi teeb tsa, kev teeb tsa kev lag luam, nce tus nqi teeb tsa, tsis siv neeg xoom hloov kho thiab lub neej ntawd teeb tsa kev saib xyuas. 5.1 Main programming design Lub zog hauv lub tshuab hluav taws xob multihead weighter saib xyuas yog txhua tus neeg siv khoom siv raws li kev ua haujlwm vaj huam sib luag hauv tib neeg-khoos phis tawj technology system software. Yog li ntawd, cov kev saib xyuas thiab kev sib tham sib system software tau cog lus rau cov txheej txheem hauv qab no; human-computer interactions Txhua qhov kev ua haujlwm ntawm cov txheej txheem software software raug teeb tsa kom sib haum mus rau ib byte, uas yog hu ua lo lus txib. Thaum lub lag luam vaj huam sib luag ua tiav kev ua haujlwm ntawm ib qho kev ua haujlwm, tus txheeb ze cov lus txib raug thawb los ntawm tib neeg-khoos phis tawj kev sib cuam tshuam technology system software, thiab cov kev saib xyuas lees txais nws los ntawm kev txiav tawm serial interface (vim txoj cai tshuaj xyuas yuav tsum tau ua. Kev hnyav thiab thawb hnyav tom qab qhov kev ua haujlwm tiag tiag ntawm qhov tshwm sim, nws tsuas yog tuaj yeem lees txais los ntawm txoj kev txiav tawm tab sis tsis yog los ntawm cov lus nug), tom qab ua tiav cov lus qhia qhia tus lej 'mus rau cov txheeb ze kev pabcuam khoom sib dhos.

Tsis tas li ntawd, lo lus txib kuj tau thauj khoom rau hauv EEPROM, thiab nws dhau los ua lub xeev yuav tsum tau thauj khoom tom qab calibration. Hloov kho EEPROM nyob rau hauv qhov kev khiav dej num, thiab thauj khoom EEPROM cov xwm txheej lo lus dua tom qab rov qab mus rau qhov pib ntawm qhov kev khiav haujlwm ywj pheej. Tom qab txhua qhov system software pib thiab lub ntsiab parameter rov pib dua, tsis siv neeg xoom-kho qhov programming ntawm lub amplifier tau faib ib zaug, thiab qhov kev zov me nyuam yuav tsum dhia tawm ntawm lub voj voog uas hnyav thiab pib txij thaum pib tom qab txhua lub sij hawm qhov chaw nres nkoj kab raug txiav. Lub sijhawm tos ntawm qhov kev txiav tawm qhov kev khiav dej num yog rov qab mus rau qhov chaw qub ntawm purging, yog li tus chij ntxiv me ntsis 7QH tau teeb tsa kom paub qhov txawv ntawm qhov kev txiav tawm cuam tshuam tau qhib lossis tsis tau. Yog tias nws tshwm sim, nws yuav dhia tawm ntawm lub voj voog qhov hnyav thiab rov pib dua qhov tseem ceeb.”5.2 Sub-programming design-5. Lub XI amplifier yog hloov mus rau ib nrab ntawm lub assembler. Ua ntej, CPU xaiv 4th channel ntawm ntau lub channel pwm qhib. Qhov tshwm sim yog tias 2 input terminals ntawm lub amplifier nti yog luv thiab cov input voltage cov ntaub ntawv teeb liab yog xoom, thiab lub amplification yog ua. Tus nqi tso zis ntawm lub 'meter' yuav tsum tau kho——AC siab voltage. Muab lub taub hau rub ntawm X9241 ntawm qhov chaw ruaj khov ntawm lub tshuab hluav taws xob tso tawm qhov hluav taws xob tsis zoo, uas yog, xa OOH^ mus rau qhov rov qab WCRC rub lub davhlau ya nyob twg (suav lub cim xeeb) thiab tom qab ntawd qhib A / D hloov dua siab tshiab Qhov kev pab cuam ntws yog ntxiv thiab rho tawm cov tau txais cov ntaub ntawv cov ntaub ntawv (ntau tshaj 1FFFH) thiab 1FFFH (1FFFH yog cov ntaub ntawv tso zis ntau npaum li cas thaum lub zog ua haujlwm ntawm ADCMAX194 simulates cov input flow rate ntawm xoom, thiab txiav txim seb qhov sib txawv yog tus lej zoo, yog tias nws zoo, tus lej rov qab WCR. ntxiv rau KA / D thiab qhov kev ua haujlwm tiag tiag ntawm kev sib ntxiv thiab kev rho tawm, kom txog thaum qhov sib txawv yog xoom lossis nws raug txiav tawm thaum nws hloov pauv ntawm qhov zoo mus rau qhov tsis zoo. Kev hloov kho xoom zoo ib yam, qhov sib txawv nyob ntawm; CPU tsis tas yuav teeb tsa tus lej rau WCR ua ntej, tab sis tam sim ntawd ua kom muaj kev hloov pauv A / D kom paub qhov txawv ntawm cov ntaub ntawv ntim thiab qhov loj ntawm 1FFFH. Yog tias nws dhau lawm, nkag mus rau WCR thiab maj mam ntxiv 1 rau lub assembler. Tom qab ntawd nkag mus rau WCR thiab maj mam txo lub assembler los ntawm 1.

Ntawm no, tus nqi WCR tau hloov maj mam nyob rau hauv ib qho ntawm ob qhov sib dhos kom txog thaum A / D cov zis thiab 1FFFH raug txiav tawm yav tom ntej. 5.2.3 Base value setting program flow Xaiv lub hauv paus tus nqi teeb tsa ntawm lub lag luam vaj huam sib luag ntawm kev sib tham sib technology system software thiab nias thiab tuav. Lub sijhawm no, CPU ntawm kev saib xyuas qhov system tuaj yeem hloov mus rau qhov kev daws teeb meem kev sib dhos vim tau txais cov ntaub ntawv teeb liab ntawm kev sib txuas lus ntawm daim ntawv thov, thiab txheeb xyuas qhov kev lees txais hauv kev txiav txim siab daws teeb meem. mus rau qhov system hais kom ua lo lus, thiab tom qab ntawd nkag mus rau lub hauv paus tus nqi teeb tsa assembler.

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