Mermistor, wani bangare ne na semiconducteconan, ana nuna shi ta matsanancin tsananin tunaninsa ga canje-canje na zafi.An rarrabe shi cikin nau'ikan guda biyu dangane da madaidaitan zazzabi: ingantacciyar zazzabi mai dacewa (PTC) da mummunan zafin jiki mai dacewa (NTC) Mermistor (NTC) Mermistor.NTC Thermistor, wanda aka sani da ma'aunin zafin jiki, iko, da ƙarfin diyya, an gano su sosai azaman yanayin zafin jiki.Haka ne, PTC Mermistor, yayin da kuma amfani da ma'aunin zafin jiki da sarrafawa, sau biyu azaman tsawa da ayyuka a matsayin "juyawa".Yana amalgammes matsayin mai hankali, heater, da canzawa, samun shi da moniker "Thermal sauyawa".
Mallaka cikin matsanancin Thermor, an bayyana shi da mummunan yanayin zafin jikinsa, yana nuna cewa juriya ya narke bisa muhimmanci kamar yadda zafin jiki ya tashi.Wannan yanayin yana sa kayan haɗin NTC sun shahara a cikin hanyoyin farawa mai laushi, da ganowa ta atomatik da da'irori a cikin ƙananan kayan aiki.A gefe guda, PTC Mermistor ya nuna madaidaitan zafin jiki da aka gyara, inda juriya ke ƙaruwa da zazzabi, saboda haka amfani da shi a cikin da'irar sarrafawa ta atomatik.
The NTC Thermistor ne na yumbu semiconnicturctor, mai tsananin zafi-zafi wanda aka yi da shi daga cakuda ƙarfe na ƙarfe, galibin manganese, cobalt, da nickel.Ikon hali-ƙarfin ƙarfin sifili mai mahimmanci yana da dangantaka da zafin jiki na kansa.Ainihin, Mermistor mai tsananin zafi-mai zafi yake yiwa, yana daidaita juriya game da amsar zafin jiki a cikin bangaren kanta.
Mai da hankali kan mummunan zazzabi (NTC) Mermistor (NTC), ƙarancin ikonta mai tsauri (T) an ayyana shi azaman tsayayyen yanayi inda ake amfani da shi a ƙarƙashin DC a halin yanzu.Idan ana ci gaba da iko, da canjin canjin cikin juriya ya ci gaba da kashi 0.1%.Abubuwan da aka akai (b), ana kirga wani siginar maɓalli, ana lissafta ta amfani da tsarin yanayin yanayin yanayi biyu (ta amfani da zazzabi K): (R1 / R2) / (R1 / T1-1)Yawanci an ƙaddara a T1 = 298.15K da T2 = 323.15K ko 358.15k, a dabi'u gabaɗaya daga 2000 zuwa 6000k.Mafi girma darajar B, mafi girma canjin canjin kudi a 1 ° C.
Matsakaicin daidaito (Δ) yana wakiltar ikon da NTC da aka buƙata don ƙara yawan zafin jiki ta hanyar 1 ° C ta hanyar dumama, galibi ana bayyana shi a cikin Mw / ° C.Ana lissafta ta Δ = v× I / (T-T0).Aƙarshe, lokacin zafi akai (τ) shine lokacin da ake buƙata don Mermistor don ya canza yanayin zafin rana na 63.2% na zazzabi T1 a ƙarƙashin yanayin wutar lantarki T1 a ƙarƙashin yanayin wutar lantarki, ana iya auna shi a cikin seconds (s).