Menene Sensor Zazzabi na NTC?

Menene Sensor Zazzabi na NTC?

Don fahimtar aiki da aikace-aikacen firikwensin zafin jiki na NTC, dole ne mu fara sanin menene NTC thermistor.
Yadda na'urar firikwensin zafin jiki na NTC yayi bayani a sauƙaƙe
Masu jagoranci masu zafi ko masu ɗumi sune masu tsayayyar lantarki tare da ƙarancin zafin jiki mara kyau (NTC a takaice). Idan halin yanzu yana gudana ta cikin abubuwan da aka gyara, juriyarsu tana raguwa tare da haɓaka yanayin zafi. Idan yanayin zafin yanayi ya faɗi (misali a hannun rigar nutsewa), abubuwan da aka gyara, a gefe guda, suna amsawa tare da ƙara juriya. Saboda wannan ɗabi'a ta musamman, ƙwararru kuma suna komawa ga resistor NTC azaman thermistor NTC.

Juriya na lantarki yana raguwa lokacin da electrons ke motsawa
Resistors NTC sun ƙunshi kayan semiconductor, wanda ke da alhakin tafiyar da su gabaɗaya tsakanin na masu gudanar da wutar lantarki da masu ba da wutar lantarki. Idan abubuwan da aka gyara sun yi zafi, electrons suna sassauta daga atom ɗin lattice. Suna barin wurinsu a cikin tsarin kuma suna jigilar wutar lantarki da kyau. Sakamakon: Tare da karuwar zafin jiki, masu amfani da wutar lantarki suna gudanar da wutar lantarki mafi kyau - juriya na lantarki yana raguwa. Ana amfani da abubuwan da aka gyara, a tsakanin sauran abubuwa, azaman firikwensin zafin jiki, amma saboda wannan dole ne a haɗa su zuwa tushen wutar lantarki da ammeter.

Kera da kaddarorin masu zafi da sanyi
Mai tsayayyar NTC na iya mayar da martani da rauni sosai ko, a wasu wurare, da ƙarfi sosai ga canje-canjen yanayin yanayi. Halaye na musamman ya dogara da ƙera abubuwan haɗin. Ta wannan hanyar, masu kera suna daidaita ma'auni na haɗe-haɗe na oxides ko doping na ƙarfe oxides zuwa yanayin da ake so. Amma kaddarorin abubuwan kuma ana iya yin tasiri tare da tsarin masana'anta da kanta. Misali, ta hanyar abun ciki na iskar oxygen a cikin yanayin harbe-harbe ko adadin sanyaya abubuwan abubuwan.

Kayayyaki daban-daban don resistor NTC
Ana amfani da kayan semiconductor masu tsafta, mahaɗan semiconductor ko ƙarfe ƙarfe don tabbatar da cewa masu zafi suna nuna halayen halayen su. Na ƙarshe yakan ƙunshi ƙarfe oxides (haɗin ƙarfe da oxygen) na manganese, nickel, cobalt, baƙin ƙarfe, jan ƙarfe ko titanium. Ana haxa kayan tare da wakilai masu ɗaure, dannawa da sintered. Masu sana'anta suna zafi da albarkatun ƙasa a ƙarƙashin matsanancin matsin lamba har sai an ƙirƙiri kayan aiki tare da kaddarorin da ake so.

Halayen halayen thermistor a kallo
Ana samun resistor NTC a jeri daga ohm daya zuwa megohms 100. Za a iya amfani da abubuwan da aka gyara daga rage 60 zuwa da 200 digiri Celsius kuma a sami juriya na 0.1 zuwa 20 bisa dari. Lokacin zabar thermistor, dole ne a yi la'akari da sigogi daban-daban. Ɗaya daga cikin mafi mahimmanci shine juriya na suna. Yana nuna ƙimar juriya a yanayin zafin da aka bayar (yawanci 25 digiri Celsius) kuma ana yiwa alama da babban babban R da zafin jiki. Misali, R25 don ƙimar juriya a 25 digiri Celsius. Halaye na musamman a yanayin zafi daban-daban shima ya dace. Ana iya ƙayyadadden wannan tare da teburi, dabaru ko zane-zane kuma dole ne ya dace da aikace-aikacen da ake so. Ƙarin halayen dabi'u na masu adawa da NTC suna da alaƙa da haƙuri da kuma wasu iyakokin zafin jiki da ƙarfin lantarki.

Daban-daban na aikace-aikace na NTC resistor
Kamar resistor PTC, NTC resistor shima ya dace da auna zafin jiki. Ƙimar juriya tana canzawa dangane da yanayin zafi. Don kada a gurbata sakamakon, dole ne a iyakance yawan zafin jiki kamar yadda zai yiwu. Koyaya, ana iya amfani da dumama kai yayin gudanawar yanzu don iyakance inrush halin yanzu. Domin NTC resistor yana sanyi bayan kunna na'urorin lantarki, ta yadda kadan kadan ne ke gudana a farko. Bayan wani lokaci a cikin aiki, thermistor yana zafi sama, juriya na lantarki ya faɗo kuma ƙarin gudanawar yanzu. Na'urorin lantarki suna samun cikakken aikin su ta wannan hanya tare da wani ɗan lokaci na jinkiri.

Resistor na NTC yana gudanar da halin yanzu na lantarki da rauni a ƙananan yanayin zafi. Idan yanayin yanayin zafi ya karu, juriya na abin da ake kira masu jagoranci mai dumi yana raguwa sosai. Ana iya amfani da halayen musamman na abubuwan semiconductor da farko don auna zafin jiki, don ƙayyadaddun ƙayyadaddun halin yanzu ko don jinkiri daban-daban contr.