Ulwazi lobuGcisa

1. Iingcaciso ezisisiseko kunye neMithetho-siseko yokuSebenza

Yintoni iThermistor ye-NTC?

       ■   Ingcaciso:I-Temperature Coefficient (NTC) thermistor licandelo le-semiconductor yeseramic encipha ukuxhathisa.ngokukhawulezanjengoko ubushushu bunyuka. Isetyenziswa ngokubanzi kumlinganiselo wobushushu, imbuyekezo yobushushu, kunye noxinzelelo lwangoku lwe-inrush.

        ■   UmGaqo wokuSebenza:Yenziwe kwii-oxide zetsimbi zenguqu (umzekelo, i-mangan ese, i-cobalt, i-nickel), utshintsho kwiqondo lokushisa luguqula ukugxininiswa komthwali ngaphakathi kwezinto, okukhokelela ekutshintsheni ukuchasana.

Ukuthelekiswa kweeNdidi zoVavanyo lobushushu

Uhlobo	Umgaqo	Iingenelo	Iingxaki
NTC	Ukumelana nokushisa kuyahluka	Uvakalelo oluphezulu, ixabiso eliphantsi	Imveliso engeyiyo yomgca
RTD	Ukuxhathisa kwesinyithi kuyahluka ngobushushu	Ukuchaneka okuphezulu, umgca olungileyo	Iindleko eziphezulu, impendulo ecothayo
Thermocouple	Impembelelo ye-Thermoelectric (i-voltage eyenziwe ngumahluko wobushushu)	Uluhlu olubanzi lobushushu (-200°C ukuya ku-1800°C)	Ifuna imbuyekezo yesiphambuka esibandayo, umqondiso obuthathaka
ISensom yoBuqondo yeDijithali	Iguqula ubushushu bube kwimveliso yedijithali	Ukuhlanganiswa okulula kunye ne-microcontrollers, ukuchaneka okuphezulu	Uluhlu lobushushu obulinganiselweyo, ixabiso eliphezulu kune-NTC
I-LPTC (Umgca wePTC)	Ukuchasana kwandisa ngokuhambelana nobushushu	Imveliso yomgca elula, ilungile kukhuseleko lobushushu obugqithisileyo	Uvakalelo olulinganiselweyo, umda wesicelo omxinwa

2. IiParamitha zoMsebenzi oPhambili kunye nesigama

IiParameters ezingundoqo

       ■   Ukuchasa ngokweNgcaciso (R25):

Ukumelana namandla angama-zero kwi-25 ° C, ngokuqhelekileyo ukusuka kwi-1kΩ ukuya kwi-100kΩ.XIXITRONICSingenziwa ngokwezifiso ukuhlangabezana ne-0.5～5000kΩ

       ■Ixabiso le-B (i-Thermal Index):

Inkcazo: B = (T1 · T2) / (T2-T1) · ln (R1 / R2), ebonisa uvakalelo lokumelana nokutshintsha kweqondo lokushisa (iyunithi: K).
                       Uluhlu lwexabiso eliqhelekileyo le-B: 3000K ukuya ku-4600K (umzekelo, B25/85=3950K)
I-XIXITRONICS inokwenziwa ngokwezifiso ukuhlangabezana ne-2500～5000K

       ■   Ukuchaneka (Ukunyamezela):

Ukutenxa kwexabiso lokuchasa (umzekelo, ± 1%, ± 3%) kunye nokuchaneka komlinganiselo wobushushu (umzekelo, ± 0.5 ° C).
I-XIXITRONICS inokwenziwa ngokwezifiso ukuhlangabezana ne-± 0.2 ℃ kuluhlu lwe-0℃ ukuya kwi-70℃, ukuchaneka okuphezulu kunokufikelela kwi-0.05℃.

       ■Umba wokuLahla (δ):

Ipharamitha ebonisa iziphumo zokuzifudumeza, ezilinganiswe kwi-mW/°C (amaxabiso aphantsi athetha ukuzifudumeza okungaphantsi).

       ■Ixesha rhoqo (τ):

Ixesha elifunekayo ukuze i-thermistor iphendule kwi-63.2% yokutshintsha kweqondo lokushisa (umzekelo, imizuzwana emi-5 emanzini, imizuzwana engama-20 emoyeni).

Imigaqo yobuGcisa

        ■   Steinhart-Hart Equation:

Imodeli yemathematika echaza ubudlelwane bokuchasana nobushushu be-NTC thermistors:

(T: Ubushushu obupheleleyo, R: Ukuxhathisa, A/B/C: Constants)

       ■   α (I-Coefficient yobushushu):

Ireyithi yokumelana nokutshintsha kweyunithi nganye yokutshintsha kobushushu:

       ■   Itheyibhile yeRT (Itheyibhile yokuchasa-ubushushu):

Itheyibhile yereferensi ebonisa amaxabiso okumelana nomgangatho kumaqondo obushushu ahlukeneyo, asetyenziselwa ukulinganisa okanye ukuyila kwesekethe.

3. Usetyenziso oluqhelekileyo lwe-NTC Thermistors

Iinkalo zeSicelo

        1. Umlinganiselo wobushushu:

                     o   Izixhobo zasekhaya (i-air conditioners, iifriji), izixhobo zamashishini, iimoto (ibhetri ipakethi / ukujongwa kobushushu bemoto).

       2. Imbuyekezo yoBuqondo:

                     oUkuhlawulela ukukhukuliseka kobushushu kwezinye izinto ze-elektroniki (umzekelo, ii-crystal oscillators, ii-LEDs).

       3. Uxinzelelo lwangoku lwe-Inrush:

                     oUkusebenzisa uxhathiso oluphezulu olubandayo ukukhawulela i-inrush yangoku ngexesha lokuqalisa amandla.

Imizekelo yoYilo lweSekethe

•   ISekethe ye-Voltge Divider:

(Ubushushu bubalwa ngokufunda amandla ombane nge-ADC.)

       •   Iindlela zokumisela umgca:

Ukongeza i-resistors esisigxina kwi-series / parallel ukunyusa i-non-linear output ye-NTC (ibandakanya iidiagram zesekethe yereferensi).

4. Izixhobo zobuGcisa kunye neZixhobo

Izibonelelo zasimahla

•Amaxwebhu edatha:Bandakanya iiparamitha ezineenkcukacha, imilinganiselo, kunye neemeko zovavanyo.

•Itheyibhile yeRT Excel ( PDF ) Template: Ivumela abathengi ukuba bajonge ngokukhawuleza amaxabiso okumelana nobushushu.

•Amanqaku esicelo:

                     oIingqwalasela zoYilo lwe-NTC kuKhuseleko loBubushushu bebhetri yeLithium

                     oUkuphucula ukuChaneka koMlinganiselo woBubushushu be-NTC ngoLungiso lweSoftwe

Izixhobo ze-Intanethi

       • B Isibali sexabiso:Igalelo T1/R1 kunye T2/R2 ukubala ixabiso B.

       •Isixhobo sokuguqula ubushushu: Ukumelana negalelo lokufumana ubushushu obuhambelanayo (ixhasa i-Steinhart-Hart equation).

5. Iingcebiso zoYilo (EziNjineli)

• Ziphephe iimpazamo zokuzifudumeza ngokwakho:Qinisekisa ukuba ukusebenza kwangoku kungaphantsi kobuninzi obuchaziweyo kwidatha yedatha (umz., 10μA).

• Ukhuseleko lokusiNgqongileyo:Kwiindawo ezifumileyo okanye ezidlekayo, sebenzisa ii-NTC ezigqunywe ngeglasi okanye ezigqunywe nge-epoxy.

• Iingcebiso zoLungiso:Ukuphucula ukuchaneka kwenkqubo ngokwenza ukulinganisa kwamanqaku amabini (umz., 0 ° C kunye ne-100 ° C).

6.Imibuzo Ebuzwa Rhoqo (FAQ)

1. Umbuzo: Yintoni umahluko phakathi kwe-NTC kunye ne-PTC thermistors?

                     o   A: I-PTC (i-Positive Temperature Coefficient) i-thermistors inyusa ukuchasana nobushushu kwaye isetyenziselwa ukukhuselwa kwe-overcurrent, ngelixa i-thermistors ye-NTC isetyenziselwa ukulinganisa ubushushu kunye nembuyekezo.

2. Q: Indlela yokukhetha ixabiso elifanelekileyo le-B?

                     o   A: Amaxabiso aphezulu e-B (umzekelo, B25/85=4700K) anika uvakalelo oluphezulu kwaye afanele amaqondo obushushu obumxinwa, ngelixa amaxabiso e-B aphantsi (umz., B25/50=3435K) angcono kuluhlu olubanzi lobushushu.

3. Umbuzo: Ngaba ubude bocingo buchaphazela ukuchaneka komlinganiselo?

                     oA: Ewe, iingcingo ezide zizisa ukuchasana okongeziweyo, okunokuthi kubuyekezwe ngokusebenzisa i-3-wire okanye i-4-wire connection method.