Smart Weigh yakazvipira kubatsira vatengi kuwedzera chigadzirwa nemutengo wakaderedzwa.
Mutauro
Smart Weigh yakazvipira kubatsira vatengi kuwedzera chigadzirwa nemutengo wakaderedzwa.
Munyori: Smartweigh–Multihead Weighter
Iyo yedhijitari inoratidzira multihead weigher yakagadzirwa mubepa rino inoyera yekudzora kuratidza mudziyo yakavakirwa pakupikisa strain force sensor uye dhizaini yeimwe chip microcomputer sekiyi yekudzora. Iyo yekuona huwandu ndeye 0-10kg, uye kuyerwa kwechiyero ndiko±2g, iyo yemvura yekristaro inoratidzira skrini inoratidza ruzivo rweiyo chaiyo kuyerwa data, nekuwedzera, iyo ruzivo rweiyo chaiyo yekuyera data inogona kutumirwa kune yemagetsi komputa kuratidza ruzivo zvinoenderana neserial port. 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 weighing sensor resistor Iyo strain force inoyera sensor inoumbwa neakawanda akakosha zvikamu senge resistance strain gauges, polyurethane elastomers uye yekuongorora magetsi ekupa maseketi. constitute.
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. Tarisa dunhu rekupa magetsi sezvakaratidzwa muMufananidzo 2, uye shandura kupikisa kwegeji yekudzivirira kuita gauge inoshanda. Nekuti bhiriji reWheatstone rine zvakawanda zvakanakira, sekugona kudzvanya kukuvadzwa kwekushanduka kwetembiricha, kudzvanya simba repadivi, uye kugadzirisa nyore nyore dambudziko remuripo wehuremu sensor, bhiriji reWheatstone rakawana mukana mukuru sensor yekuyera. kushandiswa kwese.
Sensor yekuyera kazhinji ine mitsara mina yekubuda, uye inobuda kuramba iri 350Ω, 480Ω, 700Ω, 1000Ω. Mhedziso yekuisa inowanzoita imwe muripo wekushisa uye kunzwa, uye yekuisa yekupedzisira resistor ichave yakakwira kupfuura inobuda. 20 ~ 100Ω, saka Shandisa dhijitari multimeter kuyera kukosha kwekupokana kuti uone zvinobuda. 1.2. Iyo inobuda data siginecha yeamplifying circuit strain-type kuyera sensor haina kusimba (mV kana kunyange μV heavyweight), uye kazhinji pane ruzha rwakawanda pamwe nayo. Kune yakadaro data chiratidzo, nhanho yekutanga mumagetsi ekupa dunhu mhinduro kazhinji ndeyekusarudza chiridzwa amplifier kuti utange wakudza diki data chiratidzo.
Iyo instrumentation amplifier simba rekupa wedunhu ine yakasimba yakajairika nzira yekuramba kugona pane yakapusa mutsauko chiratidzo amplifier wedunhu. Icho chinonyanya kukosha chinangwa chekuwedzera hachisi kukosha kwekuwana, asi kungovandudza frequency kugadzikana kweiyo magetsi emagetsi. Mune iyi dhizaini hurongwa, iyo instrumentation amplifier inotora chimiro cheOP07 matatu anoshanda amplifiers.
3 sezvakaratidzwa muFig. 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 imwe chete, kusanganisira magetsi anogadziriswa anogadziriswa, on-chip clock oscillator, nezvimwe zvakadaro. Pinda switch kuti usarudze chiteshi chekuchengetedza A kana chiteshi chekuchengetedza B paunoda, uye yemukati yakaderera-ruzha chirongwa chekudzora amplifier chakabatana pakati pezviviri.
Iko kukosha kwemugadziri wechirongwa chekuchengetedza chiteshi A ndeye 128 kana 64, uye iyo inoenderana yakazara kiredhiti muganho musiyano wekuisa chiratidzo che data chiratidzo amplitude kukosha zvakateerana.±20m.
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