Qore: Smartweigh-Miisaanka madaxa badan
Miisaanka madaxa-madaxa badan ee dhijitaalka ah ee loo qaabeeyey warqadan ayaa ah aalad bandhig kontorool miisaaneed oo ku salaysan dareemaha culayska iska caabinta iyo naqshadaynta kombuyuutarka yar ee chip-ka oo ah furaha xakamaynta. Qiyaasta ogaanshaha waa 0-10kg, saxnaanta cabbirkuna waa±2g, shaashadda shaashadda dareeraha ah waxay soo bandhigaysaa macluumaadka xogta cabbirka saxda ah, marka lagu daro, macluumaadka xogta cabbirka saxda ah ayaa loo diri karaa kombuyuutarka elektaroonigga ah si loo muujiyo macluumaadka sida ku xusan dekedda taxanaha ah. Software-ka nidaamku wuxuu leeyahay sifooyin sax ah oo sarreeya, sifooyin xasilloon iyo hawlgal fudud. Jaantuska qaabka naqshadaynta miisaanka madaxa badan waxa lagu muujiyay sawirka 1 ee hoose: 1. Mabda'a qaabaynta qalabka 1.1. Dareemaha miisaanka culeyska Dareemaha culeyska culeyska wuxuu ka kooban yahay qaybo badan oo muhiim ah sida cabbirada culeyska iska caabbinta, elastomeryada poliurethane iyo kormeerka saadka korontada. ka kooban yahay.
Elastomer-ka poliurethane wuxuu keenaa qallafsanaan laastikada ah oo hoos yimaada xoogga dibadda, sidaas darteed qiyaasta cadaadiska iska caabbinta ee ku xiran dusha sare waxay sidoo kale keentaa qallafsanaan. Ka dib marka cabbirka caabbinta caabbinta uu xumaado, qiimihiisu caabbinta ayaa isbeddeli doona (kordhinta ama hoos u dhigi doonta), ka dibna iyada oo loo marayo cabbir aad u sax ah Wareegga korantadu wuxuu u beddelaa caabiyahan calaamad elektiroonig ah (koronto shaqaynaysa ama hadda), ka dibna wuxuu dhammaystiraa dhammaan habka beddelka. xoog dibadeed galay signal elegtaroonig ah. Hubi wareegga sahayda korantada sida ku cad Jaantuska 2, oo u beddel caabbinta cabbirka cadaadiska iska caabbinta oo u beddel koronto shaqaynaysa. Sababtoo ah buundada Wheatstone waxay leedahay faa'iidooyin badan, sida awoodda lagu xakameynayo waxyeelada isbeddelka heerkulka, si loo xakameeyo saameynta xoogga dhinaca, iyo in si fudud loola tacaalo dhibaatada magdhowga miisaanka miisaanka, buundada Wheatstone ayaa faa'iido weyn ka heshay dareemaha miisaanka. isticmaalka caalamiga ah.
Dareemka miisaanku guud ahaan wuxuu leeyahay wadar ahaan afar xariiq oo wax soo saar ah, caabbinta wax soo saarkuna guud ahaan waa 350Ω, 480Ω, 700Ω, 1000Ω. Dhamaadka wax gelinta guud ahaan waxa ay fulisaa xoogaa magdhow ah heerkulka iyo dareenka, iyo caabiyaha dhamaadka gelinta ayaa ka sarrayn doona dhamaadka wax soo saarka. 20 ~ 100Ω, markaa Isticmaal multimeter-ka dhijitaalka ah si aad u cabbirto qiimaha iska caabinta si aad u aqoonsato terminaalka wax soo saarka. 1.2. Calaamadda xogta wax-soo-saarka ee dareemaha culeyska nooca wareegga wareegga ma xoog badna (mV ama xitaa μV culus), waxaana inta badan jira buuq badan oo la socda. Calaamadaha xogta noocan oo kale ah, tallaabada ugu horreysa ee xalka wareegga sahayda korantada guud ahaan waa in la doorto cod-weyneeye qalab si marka hore loo ballaariyo calaamadda xogta yar.
Qalabka cod-weyneeye wareegga sahayda korantada ayaa leh awood diidmo caadi ah oo ka xoog badan marka loo eego wareegga dhawaaqa dhawaaqa kala duwan ee fudud. Ujeedada ugu muhiimsan ee kordhinta maaha qiimaha faa'iidada, laakiin kaliya si loo hagaajiyo xasilloonida soo noqnoqda ee wareegga sahayda korantada. Qorshahan naqshadaynta, cod-weyneeye qalabku wuxuu qaadanayaa qaab-dhismeedka OP07 saddexda cod-weyneeye ee hawlgalka ah.
3 sida ku cad sawirka. Marka R1 = R2, R3=R4, Rf=R5, faa'iidada faa'iidada wareegga korontada waa: G=(1+2R1/RG1) (Rf/R3). Waxaa laga arki karaa xisaabinta qaacidada in hagaajinta qiimaha faa'iidada wareegga sahayda korantada lagu dhammayn karo iyadoo la beddelayo qiimaha iska caabinta RG1.
1. 3. Beddelka A/D wareegga sahayda korontada A/D beddelaha ayaa doorta icHX711 isku dhafan miisaan-gaar ah, kaas oo ah beddelaha 24-bit A/D isku dhafan ic si gaar ah loogu talagalay cabbirada elektiroonigga ah ee saxda ah. Marka la barbardhigo IC-yada kale ee isku dhafan ee isku midka ah, isku-dhafka IC wuxuu isku daraa wareegyada durugsan ee lagama maarmaanka u ah IC-yada kale ee isku midka ah ee isku midka ah, oo ay ku jiraan sahay koronto la hagaajin karo, oscillator saacad-chip ah, iyo wixii la mid ah. Geli furaha si aad u dooratid kanaalka badbaadada A ama kanaalka badbaadada B sidaad doonto, iyo cod-weyneeye barnaamijka sanqadha hoose ayaa ku xidhan labada dhexdooda.
Qiimaha faa'iidada ee maamulaha barnaamijka ee kanaalka badbaadada A waa 128 ama 64, iyo xadka amaahda buuxda ee u dhiganta farqiga kala duwanaanshaha xogta calaamadaynta qiimuhu waa siday u kala horreeyaan.±20m
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