Enye yezona ntlobo eziqhelekileyo zentsholongwane yokushisa kwiimarike yi-thermistor, inguqu encinci ye-"resistance resistant". Iimvumi zizinto eziphantsi kweendleko eziphantsi kakhulu ezinamandla kwaye zinamandla. I-thermistor iyinzwa yeqondo lokushisa elikhethiweyo kwizicelo ezifuna ukuqonda okukhulu nokuchaneka okuchanekileyo. Iimvumi zixhomekeke kwiinkqubo ezincinci zokusebenza kwezotyuli ngenxa yezimpendulo zabo ezingekho komgca kwiqondo lokushisa.
Ukwakhiwa
Ama-thermistors amacandelo amabini e-wire eyenziwe nge-oxides ene-metal oxinstiweyo ekhoyo kwiindidi zephakheji ezininzi zokuxhasa izicelo ezahlukeneyo. Iiphakheji eziqhelekileyo ze-thermistor yi-bead encinane yeglasi kunye nobubanzi be-0.5 ukuya kwi-5mm kunye neengcingo ezimbini. Iimvumi zifumaneka nakwiiphakheji ezinokuphakanyiswa komhlaba, ii-disks, kwaye zifakwe kwiiprabhu zetsimbi zethusi. Iiglasi ze-glass bead thermistors ziqine kakhulu kwaye zizinzileyo, kunye nemoya yokuhluleka eqhelekileyo yonakalisa iifowuni ezimbini. Nangona kunjalo, kwiimfuno ezifuna iqondo eliphezulu lokugqithisa, ityhubhu yensimbi ityhola i-style thermistors inikezela ngakumbi ukhuseleko.
Izinzuzo
Iimvumi ziinzuzo ezininzi, kuquka ukuchaneka, ubuzwe, ukuzinza, ixesha lokuphendula ngokukhawuleza, i-electronics elula, kunye neendleko eziphantsi. Isiphaluka kwi-interface kunye ne-thermistor inokuba yinto elula njengengqinamba yokukhupha kunye nokulinganisa umbane kwi-thermistor. Nangona kunjalo, impendulo yamathamli kwiqondo lokushisa aliyona ilayini kwaye ijwayele ukulungiswa kwinqanaba lokushisa elincinci elithintela ukuchaneka kwifestile elincinci ngaphandle kokuba kusetyenziswe izicwangciso ze-linearization okanye ezinye iindlela zokubuyisela. Impendulo engekho-mgca yenza i-thermistors ibe nefuthe kakhulu kwiinguqu zokushisa. Kwakhona, ubungakanani obuncinci kunye nobukhulu be-thermistor banika ubungqina obuncinane bomzimba obuvumela i-thermistor ukuba iphendule ngokukhawuleza kwinguqu ekushiseni.
Indlela yokuziphatha
Ama-thermistors atholakalayo kunye ne-negative or positive coefficient (NTC okanye iPTC). I-thermistor eneqondo lokushisa elibi liba yincinci encinci njengoko iqondo lokushisa landa xa i-thermistor eneqondo elifanelekileyo likhula ngokunyuka kokunyuka njengoko ukushisa kwayo kwanda. Ii-thermistors ze-PTC zisoloko zisetyenziselwa uchungechunge ngamacandelo apho ukuqhubeka kwamanje kungenza umonakalo. Njengempahla yokuhlaselwa, xa iqhuba ngoku, i-thermistors yenza ukushisa okubangela ukuba utshintsho lugxininiswe. Ekubeni i-thermistors ifuna ukuba umthombo wamandla okanye umthombo wamandla usebenze, ukutshisa okutshatyalaliswayo ukuguqulwa kokutshatyalaliswa kuyinto engenakukhunjulwa kunye nama-thermistors. Kwiimeko ezininzi, iziphumo zokufudumala ziphantsi kwaye imbuyekezo iyadingeka kuphela xa kuchanekileyo ukuchaneka.
Iindlela zoMsebenzi
Ama-thermistors asetyenziswa kwiimodare ezimbini zokusebenza ngaphaya kobungqina bokumelana nokusebenza kwemodi yokushisa. Imodi ye-voltage-vs-current isebenzisa i-thermistor ngokuzifudumala, imeko yeemeko. Le ndlela iqhelekileyo isetyenziselwa iimitha zokuhamba apho ukuguqulwa kokuhamba komlambo ngaphaya kwe-thermistor kuya kubangela ukuba utshintsho kumandla luhlakazwe yi-thermistor, ukuxhatshazwa kwalo, kunye nokukhoyo okanye umbane kuxhomekeke kwindlela eqhutywa ngayo. I-thermistor inokusetyenziswa kwakhona kwimodi yangoku-time-time apho i-thermistor ixhomekeke kwi-current. Okwangoku kuya kubangela ukuba i-thermistor ibe yitshisa, ikhulise ukuxhatshazwa kwimeko ye-NTC thermistor kwaye ikhusele isiphaluka kwi-spike ephezulu. Ngaphandle koko i-thermistor ye-PTC kwisicelo esifanayo ingasetyenziselwa ukukhusela ukusuka kwiindawo eziphezulu zamanje.
Izicelo
Iimvumi ziye zineentlobo ezininzi zezicelo, kunye neyona ndlela ixhaphakileyo yokubona ukushisa ngokuthe ngqo kunye nokunyuswa kokunyuka. Impawu ze-NTC kunye ne-PTC thermistors zibolekisa kwizicelo ezibandakanya:
- Izalathisi zamanqanaba emveliso
- intlawulo yokushisa
- Umlinganiselo wokuhamba
- Ukukhupha iGages
- Ukukhuselwa komzimba
- I-Ampifier Gain Control
- Iirekhodi zexesha lokulahla
- Utshintsho olushushu
Ulwahlulo
Ngenxa yempendulo engafaniyo yomgca wee-thermistors, ii-circuitary circuits zivame ukufuneka ukuba zinikezele ngokuchanekileyo kakuhle kwiqondo lokushisa. Ukuphendula okungekho komgca wokumelana nokushisa kwe-thermistor kunikezwa nganiso ye-Steinhart-Hart enika ukuchasana kakuhle kumgca wokushisa. Nangona kunjalo, ukungahambisani nomgca kubangelwa ukuchaneka ngokuchanekileyo kwisenzo ngaphandle kokuba uguqulelo oluphezulu lwe-analog ukuguqulwa kwedijithali lisetyenziswe. Ukuphunyezwa kwe-linearisation elula ye-hardwaire ye-hardwaire yoluhlu olufanayo, uchungechunge, okanye olufanayo kunye noxinzelelo olunqamlekileyo kunye ne-thermistor luphucula kakhulu ulungelelaniso lweempendulo ze-thermistors kwaye lwandisa iwindi lokushisa lokusebenza kwe-thermistor ngexabiso lokuchaneka. Ixabiso lokuxhatshazwa elisetyenziselwa ukujikeleza iifomiti kufuneka likhethwe ukuba lubekwe kwindawo yeqondo lokushisa ekusebenzeni okukhulu.