Imodyuli I-ACS712 sisisombululo esinoqoqosho ukuze sikwazi ukulinganisa okwangoku kwiisekethe zakho ze-DIY. Njengomenzi, unokufuna ukugcina umkhondo wangoku kwisekethe. Kule meko, uya kulithanda eli candelo ndikubonisa lona. Isivamisi siya kufumanisa isixa sangoku kwaye sihambise imveliso yokulingana ngokuhambelana nokutsaliwe okwangoku. Ukongeza, kuba sele idityaniswe kwimodyuli, yenza unxibelelwano lube lula kakhulu, kunye neethebhu zonxibelelwano nayo yonke into oyifunayo ngaphandle kokudibanisa izinto ezininzi ezongezelelweyo.
Ukusetyenziswa kwesi sixhobo kuninzi njengoko ubona, nokuba unamandla ahlukeneyo kwisekethe, kuba ungakhetha Iinguqu ezahlukeneyo ze-ACS712 ezikhoyo. Umzekelo, i-ACS712-05A, i-ACS712-20A, i-ACS712-30A, njl., Ngokwamanqanaba akhoyo e-5A, 20A kunye ne-30A ngokwahlukeneyo.
Iziphumo zeHolo
Wikipedia
El I-ACS712 isebenza ngenxa yesiphumo seHolo. Ngayo unokulinganisa imagnethi yomhlaba kunye nemisinga, njengoko kunjalo. Xa okwangoku kuhamba ngesivamvo seHolo, kwaye sisondela kumazibuthe ahamba ngokuthe nkqo kwi-sensor, iya kuthi ke idale amandla ombane aphumayo ngokulinganayo kwimveliso yamandla ombane kunye nomsinga wangoku. Ke ngoko, ukwazi umhlaba wamagnetic, ixabiso langoku kwi-conductor okanye kwi-coil linokulinganiswa.
Las Ukusetyenziswa kweHolo Zininzi, ezivela kubavavanyi bentsimbi, imilinganiselo yangoku, imilinganiselo yentsimi kazibuthe, njengombane ongaqhagamshelani nawo, umlinganiso wobunzima bentsimbi, njl.
Iimpawu ze-ACS712
El Imodyuli ye-ACS712 ilula kakhuluNgokusekwe kwisiphumo seHolo, ine-pinout elula kakhulu. Kwelinye icala ubona izikhonkwane ezintathu kwelinye icala ithebhu yoqhagamshelo enemigca emibini apho ufuna ukulinganisa ubungakanani besekethe yangoku. Izikhonkwane ezintathu kulapho amandla aqhagamshelwe khona. Njengoko lo mfanekiso ungasentla ubonisa, ukusuka ekhohlo ukuya ekunene, uneVcc, imveliso embindini (imveliso) apho ilinganiswa khona, kunye ne-GND ithe tyaba ngasekunene.
Kuxhomekeke kwimodeli, unokulinganisa ubungakanani okanye ubunye bezixhobo ezikhoyo ngoku, kunye iinguqulelo ezintathu Isiseko se-ACS712:
- Inkcazo: ACS712ELCTR-05B-T: efikelela -5 kunye no-5A wobuninzi bonyamezelwe ngamandla. Ngobuntununtunu be-185mV / A.
- Inkcazo: ACS712ELCTR-20A-T: kule meko isusela -20 kuye ku-20A, ngovakalelo lwe-100mV / A.
- Inkcazo: ACS712ELCTR-30A-T: ukunyuka ukuya kuluhlu lwe-30 ukuya ku-30A, ngovakalelo lwe-66mV / A.
Nje ukuba uyazi ukuba, kuya kufuneka ukhumbule ukuba ekuphumeni kukunika umbane okanye Ombane 2.5v ukuba isicelo yangoku ngu 0A. Ukusuka apho, kuxhomekeke ekubeni ayilunganga okanye ilungile, iya kunyuka okanye yehle kuloo mbane. Umgca othe ngqo unokutsalwa kwigrafu ngokubeka i-voltage kunye nekhoyo ngoku kulungelelwaniso nakwi-abscissa, ngokuthambekela kwethambeka kukuziva kwemodyuli nganye kwezi.
Ke ngoko, ukuba siyazi ukuba zii-2.5 volts, ungafaka ifomula V = SI + 2.5. Apho i-S ithambeka elingana nobuntununtunu. Ukusombulula le nto ukuze ube nayo njengomsebenzi wobunzulu, kunokuthiwa I = V-2.5 / Ubuntununtunu. Oko kukuthi, ombane thabatha 2.5 kwaye yahlulwe ubuntununtunu. Oku kuya kufuneka uyithathele ingqalelo ukuze ulungelelanise i-Arduino microcontroller xa uyicwangcisa.
I-Pinout, i-datasheet kunye nalapho ungathenga khona
ukuba Unxibelelwano lwakho neArduino, ilula kakhulu ngenxa ye-pinout, Qhagamshela nje ipini ye-GND yebhodi yakho Arduino UNO nge-GND yemodyuli ye-ACS712, ipini ye-5v yeArduino eneVcc yemodyuli, kunye nombindi (ukuphuma) kunye negalelo elinye leArduino, umzekelo, A0. Kwaye, isekethe iya kuba sele igqityiwe, ngokungabikho kokudibanisa isekethe enika amandla ofuna ukulinganisa kwithebhu eluhlaza.
Khumbula ukuba ungayifumana kwiimpawu ezahlukeneyo, kwaye ndikucebisa bona iphepha lakho ledatha ukufunda okungakumbi malunga neempawu ezithile ezinokuba nazo le modyuli ye-ACS712, nangona ihlala ifana kubo bonke abavelisi ... Ukuba ufuna ukubona umzekelo, nantsi Ingcaciso yedatha yeAllegro.
Yitsho nokuba yintoni ungathenga nakweyiphi na ivenkile ekhethekileyo, okanye kubathengisi abaninzi abaphezulu abakwi-Intanethi abanjengoAmazon, ngamaxabiso asuka kwi-2 ukuya kwi-11 ye- € ngokuxhomekeke kwimodeli, enje:
Umzekelo wesicelo kunye neArduino
Owona mzekelo ulula kunye nocebisayo ukuqala ukusebenzisa le nto yile qhagamshela i-ACS712 kwibhodi yakho yeArduino kwaye emva koko uvelise ikhowudi elula ye-Arduino IDE ukwenza imilinganiselo yangoku. Faka ezinye iinkqubo, uvavanyo lukhokelela kwimultimeter engasasebenziyo okanye Akukho mveliso ifunyenweyo, kwaye uya kuba ne-ammeter elula ukuyichukumisa kunye neengcebiso zesekethe encinci kwaye unqume ukuba yeyiphi na into esebenzayo. Ukuba awufuni kuthenga okanye uneprobes, ungasebenzisa iintambo ezimbini ezikhuselweyo ngesambatho esifanelekileyo kwaye umelana nobunzulu oceba ukulinganisa ngabo.
Thatha amanyathelo afanelekileyo okhuseleko, ukuba usebenza ngamandla aphezulu usebenzisa izinto zokwambathisa umzimba okanye ungafumana umonzakalo omkhulu xa unokothuka ngombane. Soloko usebenza ngononophelo ... Jonga iimpawu zemodyuli yakho kwaye ungagqithi kumaxabiso enzonzobila elungiselelwe wona okanye aya konakaliswa, kwaye awugqithi kubuninzi bokuphakama okanye iintambo ozikhethileyo ingasebenza.
El ikhowudi yomzobo wakho we-Arduino IDE Yinto elula leyo:
//Ejemplo de código para medir intensidades para un ACS712 de 5A
float Sensibilidad=0.185; //Sensibilidad en Voltios/Amperio para sensor de 5A a 185mV/A
void setup() {
Serial.begin(9600);
}
void loop() {
float voltajeSensor= analogRead(A0)*(5.0 / 1023.0); //Para la lectura del sensor
float I=(voltajeSensor-2.5)/Sensibilidad; //Fórmula para obtener la corriente o intensidad medida con las puntas conectadas al módulo ACS712
Serial.print("La intensidad en Amperios es de: ");
Serial.println(I,3);
delay(200);
}
Ukuqwalasela
Khumbula Ukuba uqhagamshele ukuphuma kwemodyuli ye-ACS712 kwigalelo elahlukileyo, kufuneka utshintshe i-A0 iye kwipini efanelekileyo. Kuyafana ukuba usebenzise imodyuli ye-20A okanye ye-30A, kufuneka uguqule ixabiso lesibhengezo sovakalelo rhoqo ukuya kwi-100 okanye kwi-66.
Unako kwakhona guqula iifomula ukuze idatha ebuyisiweyo evela kwimilinganiselo ikwi-submultiples yee-amps, ezinje ngeMA, ukuba ilungele ukusetyenziswa kweprojekthi yakho. Ungatshintsha kwakhona ukulibaziseka ukuze yenze imilinganiselo ngokulandelelana ngakumbi okanye rhoqo, njengoko kufuneka uyilawule. Unokufaka iifayile ngaphakathi kwekhowudi yemilinganiselo, uyilinganise, njl.
Izinto ezingakumbi zokuqwalaselwa kukuba ukuba uyakwazi i-voltage kunye nekhoyo ngoku, unako ukuvelisa iifomula Kwikhowudi yomzobo ukubala ezinye iiparameter, ezinje ngokuchasene nomthetho ka-Ohm, unokumisela kwakhona amandla kwii-watts (w) ngokwazi ezi paramitha, njl. Sele uyazi ukuba umda kukucinga kwakho ... kakuhle, kunye nokusikelwa umda kwetekhnoloji oyisebenzisayo.
Uyayazi loo nto ukuba uyafuna funda ngakumbi malunga nenkqubo yeArduino, une ukuqalisa incwadi ngePDF kwaye simahla ukukhuphela apha.