Smart Weigh yakazvipira kubatsira vatengi kuwedzera chigadzirwa nemutengo wakaderedzwa.
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Smart Weigh yakazvipira kubatsira vatengi kuwedzera chigadzirwa nemutengo wakaderedzwa.
Munyori: Smartweigh–Multihead Weighter
Iyo dhijitari inoratidzira multihead weigher yakagadzirwa mubepa rino inoyera yekudzora kuratidza mudziyo wakavakirwa pane resistor strain simba sensor uye imwechete chip dhizaini sekiyi yekudzora. Iyo yekuona huwandu ndeye 0-10kg, uye kuyerwa kwechiyero ndiko±2g, iyo yemvura yekristaro inoratidzira skrini inoratidza ruzivo rweiyo chaiyo yekuyerwa data, nekuwedzera, iyo ruzivo rweiyo chaiyo yekuyera data inogona kutumirwa kune yemagetsi komputa kuratidza ruzivo zvinoenderana neiyo serial kutaurirana. Iyo system software ine hunhu hwehupamhi hwepamusoro, yakagadzikana maitiro uye nyore kushanda. Chimiro chemufananidzo we multihead weigher design scheme inoratidzwa muMufananidzo 1 pazasi: 1. Iyo hardware configuration circuit principle 1.1. Iyo uremu sensor resistor Iyo strain force type huremu sensor inoumbwa neakawanda akakosha zvikamu senge resistance strain gauges, polyurethane elastomers uye ekuongorora magetsi maseketi.
Iyo polyurethane elastomer inokonzeresa elastic deformation pasi pesimba rekunze, zvekuti iyo yekudzivirira strain geji yakasungirirwa pamusoro payo zvakare inokonzeresa deformation. Mushure mekunge gauge yekupikisa yakaremara, kukosha kwayo kwekudzivirira kuchachinja (kuwedzera kana kuderera), uyezve kuburikidza nechiyero chakaringana Chiyero chemagetsi chinoshandura chinopikisa ichi kuita chiratidzo chemagetsi (voltage inoshanda kana yazvino), uyezve inopedzisa maitiro ese ekushandura. simba rekunze muchiratidzo chemagetsi. Iyo yekuyedza simba redunhu inoratidzwa muMufananidzo 2, uye kuramba kweyekupikisa strain gauge inoshandurwa kuita yekushanda voltage kubuda. Nekuti bhiriji reWheatstone rine zvakawanda zvakanakira, sekugona kudzvanya kukuvadza kwekushanduka kwetembiricha, kudzvanya pesvedzero yesimba repadivi, uye kugadzirisa nyore dambudziko remuripo wehuremu sensor, bhiriji reWheatstone rakashandiswa zvakanyanya mukurema. sensors. use.
Iyo huremu sensor kazhinji ine mitsetse mina yeI/O, uye inobuda kuramba iri 350Ω, 480Ω, 700Ω, 1000Ω. Iyo yekuisa terminal inowanzoita imwe muripo wekushisa uye kunzwa. Iyo yekuisa terminal resistor ichave 20-100Ω yakakwira kupfuura inobuda terminal. Naizvozvo, iyo I/O zviteshi zvinogona kusiyaniswa nekuyera kukosha kwekupokana nedhijitari multimeter. 1.2. Iyo inobuda data chiratidzo chekushanda amplifier strain-mhando uremu sensor haina kusimba (muhurongwa hwemV kana kunyange μV), uye kazhinji inoperekedzwa neruzha rwakawanda. Kune yakadaro data chiratidzo, nhanho yekutanga mumagetsi ekupa dunhu mhinduro kazhinji ndeyekusarudza chiridzwa amplifier kuti utange wakudza diki data chiratidzo.
Instrumentation amplifier magetsi ekupa maseketi ane akasimba akajairwa maitiro ekuramba maitiro pane nyore musiyano wechiratidzo op amps. Icho chinonyanya kukosha chinangwa chekuwedzera hachisi kukosha kwekuwana, asi kungovandudza frequency kugadzikana kweiyo magetsi emagetsi. Mukugadzira uku, chiridzwa amplifier chinotora chimiro cheOP07 matatu anoshanda amplifiers.
Sezvinoratidzwa muMufananidzo 3. Apo R1 = R2, R3 = R4, Rf = R5, kukosha kwekutsvaga kwemagetsi emagetsi: G = (1 + 2R1 / RG1) (Rf / R3). Inogona kuonekwa kubva muhuwandu hwekuverenga kuti kugadziriswa kwekuwana kukosha kwemagetsi ekugadzirisa magetsi kunogona kupedzwa nekushandura kukosha kwekupikisa kweRG1.
1. 3. A / D kushandura simba rekugadzirisa magetsi A / D converter inosarudza electronic scale-specific integrated icHX711, iyo inonzi 24-bit A / D converter integrated ic yakanyatsogadzirirwa zviyero zvepamusoro zvemagetsi. Kuenzaniswa nemamwe maIC akabatanidzwa emhando imwe chete, IC yakabatanidzwa inobatanidza mitsara yeperipheral inodiwa kune mamwe maIC akabatanidzwa emhando imwechete, kusanganisira magetsi anogadziriswa anogadziriswa, on-chip digital clock oscillator, nezvimwe zvakadaro. Pinda switch kuti usarudze chiteshi chekuchengetedza A kana chiteshi chekuchengetedza B paunoda, uye yemukati-yakaderera-ruzha programmable controller amplifier yakabatana pakati pezviviri.
Iyo programmable controller inowana kukosha kwekuchengetedza chiteshi A ndeye 128 kana 64, uye inoenderana yakazara kiredhiti muganho musiyano wechiratidzo chekuisa data chiratidzo cheamplitude kukosha zvakateerana.±20mV kana±40mV. Chengetedzo chiteshi B ndeye yakagadziriswa kuwana kukosha kwe32, uye inofananidzira yakazara-chiyero musiyano wekuisa chiratidzo chekushanda voltage±80mV. Chengetedzo chiteshi B inoshandiswa kutarisa iwo makuru ma parameter eiyo system software kusanganisira bhatiri rinochajwa.
Iyi dhizaini yedhizaini inotungamira kubuda kweiyo instrumentation amplifier kune yekuisa terminal yeakachengeteka chiteshi A kuteedzera analogi yekusiyanisa chiratidzo, multihead weigher1.4, imwe chip dhizaini uye yekutaurirana interface imwe chip dhizaini inosarudza AT89C51 yakabatanidzwa ic, uye yekutaurirana interface ne makiyi ebasa, liquid crystal display screen uye electronic computer inoratidzwa mu 5. HX711 serial communication line inotungamirira kune single-chip design P1.0 uye P1.1 ports. Mushure mokunge mhinduro yacho yakagadzirwa ne-single-chip microcomputer, ruzivo rwe data runotumirwa kuLCD skrini.
Uye zvakare, nguva dzinoverengeka dzekuyerwa kwakaringana data data inotumirwa kune yemagetsi komputa kuti iratidze ruzivo zvinoenderana ne serial kutaurirana.
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