Chii chinonzi NTC Temperature Sensor?

Chii chinonzi NTC Temperature Sensor?

Kuti tinzwisise kushanda uye kushandiswa kweNTC tembiricha sensor, isu tinofanira kutanga taziva kuti NTC thermistor chii.
Iyo NTC tembiricha sensor inoshanda zvakangotsanangurwa
Makondakita anopisa kana anodziya maconductor ndiwo emagetsi resistors ane negative tembiricha coefficients (NTC kwenguva pfupi).Kana ikozvino inoyerera kuburikidza nezvikamu, kushorwa kwavo kunoderera nekuwedzera kwekushisa.Kana iyo ambient tembiricha yadonha (semuenzaniso mune inonyudza sleeve), izvo zvinoumba, kune rumwe rutivi, zvinobata nekuwedzera kuramba.Nekuda kwehunhu hwakakosha uhu, nyanzvi dzinotaurawo kune NTC resistor seNTC Thermistor.

Kuramba kwemagetsi kunodzikira kana maerekitironi achifamba
NTC resistors ine semiconductor zvinhu, iyo conductivity iyo inowanzova pakati peiyo yemagetsi conductor nemagetsi asiri-maconductors.Kana zvikamu zvichipisa, maerekitironi anosunungurwa kubva pamaatomu eretisi.Vanosiya nzvimbo yavo muchimiro uye vanotakura magetsi zviri nani.Mhedzisiro: Nekuwedzera kwekushisa, thermistors inofambisa magetsi zviri nani - kushomeka kwavo kwemagetsi kunoderera.Izvo zvikamu zvinoshandiswa, pakati pezvimwe zvinhu, se sensors tembiricha, asi nekuda kweizvi zvinofanirwa kubatanidzwa kune voltage sosi uye ammeter.

Kugadzira uye zvivakwa zvezvinopisa uye zvinotonhora conductors
Iyo NTC resistor inogona kuita zvisina kusimba kana, mune dzimwe nzvimbo, zvine simba zvakanyanya kune shanduko yeambient tembiricha.Maitiro chaiwo anoenderana nekugadzirwa kwezvikamu.Nenzira iyi, vagadziri vanogadzirisa muyero wekusanganiswa weokisi kana doping yesimbi okisidhi kune inodiwa mamiriro.Asi zvinhu zvezvikamu zvinogonawo kukanganiswa nekugadzirwa kwekugadzira pachayo.Semuenzaniso, kuburikidza neokisijeni yemukati mumhepo inopfuta kana mwero wekutonhodza wega wezvinhu.

Zvinhu zvakasiyana zveNTC resistor
Pure semiconductor zvinhu, komboni semiconductors kana esimbi alloys anoshandiswa kuve nechokwadi chekuti thermistors anoratidza hunhu hwavo.Iyo yekupedzisira inowanzo sanganisira simbi oxides (misanganiswa yesimbi uye okisijeni) yemanganese, nickel, cobalt, iron, mhangura kana titanium.Izvo zvinhu zvinosanganiswa neanosunga maajenti, akadzvanywa uye akasiiwa.Vagadziri vanopisa zvinhu zvakasvibirira pasi pekumanikidzwa kwakanyanya kusvika padanho rekuti maworkpiece ane anodiwa zvivakwa anogadzirwa.

Mamiriro chaiwo eiyo thermistor pakungotarisa
Iyo NTC resistor inowanikwa muzvikamu kubva kune imwe ohm kusvika ku100 megohms.Izvo zvikamu zvinogona kushandiswa kubva paminus 60 kusvika pakuwedzera 200 madhigirii Celsius uye kuwana kushivirira kwe0.1 kusvika 20 muzana.Kana zvasvika pakusarudza thermistor, akasiyana ma paramita anofanirwa kuverengerwa.Imwe yeanonyanya kukosha ndeyezita rekudzivirira.Inoratidza kukosha kwekupokana pane yakapihwa zita tembiricha (kazhinji 25 madhigirii Celsius) uye yakanyorwa ne capital R uye tembiricha.Semuenzaniso, R25 yekupokana kukosha pa25 degrees Celsius.Maitiro chaiwo pakupisa kwakasiyana akakodzerawo.Izvi zvinogona kutsanangurwa nematafura, mafomula kana magiraidhi uye zvinofanirwa kunyatsoenderana nechishandiso chaunoda.Humwe hunhu hunokosha hweNTC resistors hune chekuita nekushivirira pamwe chete nehumwe tembiricha nemagetsi.

Nzvimbo dzakasiyana dzekunyorera NTC resistor
Kungofanana nePTC resistor, NTC resistor inokodzerawo kuyerwa kwekushisa.Iko kukosha kwekupikisa kunoshanduka zvichienderana neambient tembiricha.Kuti urege kunyengedza zvigumisiro, kuzvipisa kunofanira kuderedzwa zvakanyanya sezvinobvira.Nekudaro, iyo yekuzvipisa panguva yekuyerera ikozvino inogona kushandiswa kudzikamisa inrush ikozvino.Nokuti iyo NTC resistor inotonhora mushure mekushandura magetsi emagetsi, kuitira kuti zvishoma zvishoma zvino zvinoyerera pakutanga.Mushure menguva yakati mukushanda, thermistor inopisa, magetsi ekudzivirira anodonha uye mamwe anoyerera anoyerera.Zvishandiso zvemagetsi zvinowana kuita kwavo kwakazara nenzira iyi neimwe nguva kunonoka.

Iyo NTC resistor inoitisa magetsi zvakanyanya kuderera pakudziya kwakaderera.Kana iyo ambient tembiricha ichiwedzera, kushorwa kwevanoti vanodziya conductors kunoderera zvinooneka.Hunhu hwakakosha hwema semiconductor zvinhu hunogona kushandiswa kunyanya kuyera tembiricha, kune inrush ikozvino kudzikisira kana kunonoka kwakasiyana siyana.