Jagora na ƙarshe zuwa DS18B20 zazzabi na dijital
2024-04-19 3996

DS18B20 shine mafi yawan amfani da zafin jiki na dijital.Yana fito da siginar dijital kuma tana da halayen ƙaramin girma, ƙarancin kayan masarufi, ƙarfin tsangwama da madaidaiciya.A cikin wannan labarin, zamu gabatar da DS18B20 na firstor daya bayan daya daga bangarorin tsarin, halaye, mizani, tsarin aiki da sauransu.

DS18B20 Shin shine na farko zazzabi samu ta Dallas Semiconductor a Amurka don tallafawa dan wasan "bas".Yana da yawan wutar lantarki mai ƙarancin iko, ƙarfin tsangwama mai ƙarfi, mai sauƙin daidaita da fa'idar aikin injinan, ana iya canza zafin jiki kai tsaye zuwa sigina na dijital ta hanyar.DS18B20 ta amfani da Sadarwar 1-Wire wacce layin bayanai ne kawai (da ƙasa) da kuma Microctroller Sadarwa.Sensor yana da kewayon yanayin yanayin zazzabi na -55 ° C zuwa 125 ° C kuma yana da daidaito na +05. ° C to 85 ° C Bugu da kari.Bugu da kari, da DS10b20 zai iya yin karar kai tsaye daga layin bayanai ba tare da bukatar samar da wutar lantarki ba.

Ba kamar theiran wasan kwaikwayo na al'ada ba, yana amfani da fasahar bas guda don rage tsangwama da haɓaka daidaito na waje.A lokaci guda, zai iya canza yanayin zafin jiki a cikin siginar dijital don sarrafa microcomputer da sarrafawa mai sauƙi ta hanyar mai sauƙin dubawa.

- DS18B20 +

- DS18B20 + T & R

- DS1821C +

Sensor an haɗa shi da sau 4, waɗanda ke da ROM 64-bit Rom, firikwensin zazzabi, mara amfani da zafin rana ba mai rahusa TM da Rajista.Lambar serial 64-bit a cikin Rome shine zane-zanen hoto kafin barin masana'antar.Ana iya ɗaukar shi azaman lambar sirrin adireshin DS180.Yawan serial 64 na kowane DS180 ya bambanta.Lambar da ke tattare da cyclic na cyclic (CRC = K ~ 8 + X ~ 5 + X ~ 4 + 1) na 64-bit rom.Aikin ROM shine yin kowane DS18B20 daban, don haka za a iya haɗa DS18b20s da yawa zuwa bas ɗaya.

DS18B20 yayi amfani da wata yarjejeniya ta waya guda ɗaya (1-waya) don sadarwa.Wannan yarjejeniya ta ba da damar DS18b20 don sadarwa tare da kebul guda ɗaya kawai don watsa bayanai da wutar lantarki.

Fentsor na iya auna girman zafin jiki na -55 ° C zuwa 125 ° C, sanya shi ya dace da bukatun zazzabi mai yawa.

Tare da motar jirgi na 1, zamu iya haɗa yawancin ds18B2 waɗanda ke da na'urori masu mahimmanci don ma'aunin zafin jiki da yawa.

Kowane DS18B2SORSOR yana da adireshin kayan aiki na 64-bit bit bit, wanda mai ƙira ta hanyar masana'anta ne ta hanyar aiwatar da samarwa.Wannan adireshin kayan aikin 64-bit yana da alaƙa da lambar ƙirar sensor, ranar samarwa da lambar serial, don haka kowane firikwensin yana da asalin asalinsa.Tare da wannan adireshin kayan aiki na 64-bit, za'a iya gano shi daban-daban kuma ana magana da shi.

DS18B20 Outputs zazzabi na digali na dijital, wanda za'a iya haɗe kai tsaye tare da tsarin dijital ba tare da buƙatar juyawa sigari ba.

DS18B2Sor Sensor yana da ikon yin auna yanayin zafi tare da matsakaicin daidaito na ± 0.5 ° C, yana sa ya dace da yanayin aikace-aikacen da ke buƙatar babban daidaito.

Fishonin yana aiki daga kewayon lantarki kewayon 3 v zuwa 5.5 V. Amfani da wutar lantarki mai ƙarancin ƙarfi don yanayin yanayin da ke buƙatar ci gaba da lura da yanayin zafi tsawon lokaci.Yawan amfani da wannan firikwensin yana da ƙanƙanta cewa yana iya aiki na dogon lokaci ba tare da wani lalacewa ba.

Karatun da rubutu na lokaci-lokaci auna ka'idodin zazzabi na DS18B20 iri ɗaya ne da na DS1820, amma adadin lambobi na darajar zazzabi samu ya bambanta saboda shawarwarin daban-daban.Idan aka kwatanta da DS1820, lokacin juyin zafin zazzabi na DS18B20 an taƙaita shi daga 2 seconds zuwa 750 miliseconds.Matsayin oscillation na yawan zafin jiki Courstal crystal oscillato ya canza muhimmanci tare da canje-canje a zazzabi, kuma ana amfani da siginar zazzabi a matsayin ƙimar bugun jini da ke daidai da -55 ° C.Counter 1 yana kirga siginar bugun jini da aka samar da ƙarancin zazzabi mai ƙarancin zazzabi.Lokacin da aka saita ƙimar counter 1 ya rage zuwa 0, ƙimar rajistar zazzabi zai ƙaru da 1, ana sake saita ƙimar ƙirar 1, da kuma counterarancin ƙididdigar yawan ƙananan zazzabi da aka samu ta hanyar ƙarancin zafin jiki.Wannan tsari zai ci gaba har sai da ƙididdigar 2 yana ƙidaya 0, wanda ya nuna darajar yawan zafin jiki zai daina.A ƙarshe, darajar a cikin yawan zafin jiki rajista shine m zazzabi.

Hotunan da ke sama sune alama, sawun ƙafa da tsarin PIN DS18B20.

Tsarin tuki na DS18B20 gatsin kan tsarin motar bas 1-waya.Wannan tsarin bas yana ba da izinin Master ɗaya don sarrafa na'urorin bayi ɗaya ko fiye.A wannan yanayin, matcu ya yi a matsayin maigidan da DS18B20 koyaushe yana aiki a matsayin bawa.A cikin tsarin bus na 1, duk umarni da bayanai an aika su daidai da ka'idar ƙaramin tsari na farko.

Tsarin bas 1-waya yana amfani da layin bayanai guda ɗaya kawai kuma yana buƙatar jingina na waje na ƙididdigar kusan 5k.Saboda haka, a cikin jihar da ba a yi amfani ba, matakin akan layin bayanai yana da yawa.Kowane na'ura (ko bawa ko bayi) an haɗa shi da layin bayanai ta hanyar bude-magudana ko 3-jihar PIN.Wannan ƙirar tana ba kowane na'urori zuwa "'yanci" layin bayanai don haka lokacin da na'urar ɗaya ba ta watsa bayanan, wasu na'urori zasu iya amfani da layin bayanai yadda yakamata.Jirgin saman waya 1 (DQ PIN) na DS18B20 ya ƙunshi kewaye mai gina na Cirruit na kewaye da cikin ciki.Ana nuna saitin kayan aikinta a cikin adadi a ƙasa:

Akwai manyan matakai guda uku don aiwatar da direban DS18B20:

Mataki na farko: Fara Ds18B20;

Mataki na biyu: Umurnin Rom (biye da kowane Buƙatar musayar bayanai);

Mataki na uku: DS18B2de umarnin aiki (duk bukatar musayar bayanai);

Kowane damar zuwa DS18B20 dole ne bi waɗannan matakan.Idan wani daga cikin wadannan matakan sun ɓace ko ba a yi ba, DS18B20 ba zai amsa ba.

Saboda ainihin daidaiton sa, ana amfani da firikwensin da akai-akai a cikin gwaje-gwajen kimiyya, musamman waɗanda ake buƙatar ainihin yanayin zafi.

DS18B20 Sensor yana taka muhimmiyar rawa a cikin dabarun sanyi.Ana amfani dashi don saka idanu akan yawan zafin jiki na kaya a ko'ina cikin tsarin sufuri, tabbatar da inganci da amincin kayan da ake kulawa da su.

Lokacin da lura da zazzabi a cikin tsarin samarwa, menu na iya taimakawa kamfanonin aikin da suka dace, wanda ya inganta kayan aikin da suka dace, wanda ya inganta haɓakar samarwa da inganci.

A cikin kayan lantarki, za a iya amfani da DS18B2 Sentors masu kula da zazzabi na kayan aikin, suna gano matsaloli kamar yadda ake lalata da asarar kayan aiki saboda hatsar yanayi.

An tsara shi don tsarin da aka saka da na'urorin iot, wannan firikwensin yana sauƙaƙe sa ido kan zazzabi da tarin bayanai ta hanyar haɗawa ko rasberi pi.

Baya ga wannan, ana amfani da firikwensin don ganin yadda tsarin sarrafa zazzabi, kamar dabarun sarrafa greenhouse, tsarin sarrafawa da sauransu.Ta amfani da DS18B2 Sensers, waɗannan tsarin na iya bayar da madaidaicin ƙarfin zafin jiki kamar yadda ake buƙata don tabbatar da aikin da ya dace don tabbatar da aikin da ya dace.

DS18B20 itace karamin yanayin zafin jiki tare da ginanniyar ADC na 12bit.Ana iya haɗa shi cikin sauƙi zuwa shigar da dijital na Ardashe.Fuskar shakatawa yana sadarwa akan motar mota ta waya kuma yana buƙatar ɗan lokacin ƙarin abubuwan haɗin.

Cutar ta hanyar DS18b20 ita ce tsarin zafin jiki na dijital.

DS18B20 masana'antar ce a cikin fitarwa zazzabi.An lm35 masana'antu masana'anta a cikin wutar lantarki (ba zazzabi), da arduino dole ne ya canza wannan zuwa zazzabi.

DS18B2bent na ligital ta dijital na dijital daidai yake daidai kuma baya buƙatar wasu abubuwan sarrafawa don aiki.Zai iya auna yanayin zafi daga -55 ° C To + 125 ° C tare da daidaito na ± 0,5 ° C.