Cov ntaub ntawv technical

1. Cov ntsiab lus tseem ceeb thiab cov ntsiab lus ua haujlwm

NTC Thermistor yog dab tsi?

       ■   Txhais:Qhov Tsis Zoo Kub Coefficient (NTC) thermistor yog ib qho khoom siv hluav taws xob semiconductor uas nws tsis kam txo.exponentiallythaum kub nce. Nws yog dav siv rau kev ntsuas kub, ntsuas kub, thiab inrush tam sim no tsuj.

        ■   Txoj Cai Ua Haujlwm:Ua los ntawm kev hloov pauv hlau oxides (piv txwv li, mangan ese, cobalt, npib tsib xee), kev hloov pauv hauv qhov kub thiab txias hloov cov cab kuj concentration hauv cov khoom, uas ua rau muaj kev hloov pauv hauv kev ua haujlwm.

Kev sib piv ntawm Temperature Sensor Hom

Hom	Txoj Cai	Qhov zoo	Qhov tsis zoo
NTC	Kuj txawv nrog qhov kub thiab txias	Siab rhiab heev, tus nqi qis	Tsis-linear tso zis
RTD	Hlau kuj txawv nrog kub	High precision, zoo linearity	Tus nqi siab, teb qeeb
Thermocouple	Thermoelectric effect (voltage generated los ntawm qhov kub thiab txias)	Dav kub ntau (-200 ° C txog 1800 ° C)	Yuav tsum tau them nyiaj txias junction, tsis muaj zog teeb liab
Digital Temperature Sensor	Hloov kub rau digital tso zis	Ib qho yooj yim kev koom ua ke nrog microcontrollers, siab precision	Tsawg kub ntau, tus nqi siab dua NTC
LPTC (Linear PTC)	Kuj nce linearly nrog kub	Yooj yim linear tso zis, zoo rau kev tiv thaiv kub dhau	Limited rhiab heev, nqaim daim ntawv thov Scope

2. Qhov tseem ceeb Performance Parameters thiab Terminology

Core Parameters

       ■   Nominal Resistance (R25):

Zero-fais fab tsis kam ntawm 25 ° C, feem ntau yog li ntawm 1kΩ txog 100kΩ.XIXITRONICStuaj yeem hloov kho kom tau raws li 0.5 ~ 5000kΩ

       ■B Tus Nqi (Thermal Index):

Txhais: B = (T1·T2)/(T2-T1) · ln(R1/R2), qhia qhov rhiab heev ntawm kev tiv thaiv kub hloov (unit: K).
                       Feem ntau B tus nqi: 3000K txog 4600K (piv txwv li, B25/85 = 3950K)
XIXITRONICS tuaj yeem hloov kho kom tau raws li 2500 ~ 5000K

       ■   Qhov tseeb (Tolerance):

Resistance tus nqi sib txawv (piv txwv li, ± 1%, ± 3%) thiab ntsuas qhov ntsuas qhov tseeb (piv txwv li, ± 0.5 ° C).
XIXITRONICS tuaj yeem hloov kho kom tau raws li ± 0.2 ℃ nyob rau hauv thaj tsam ntawm 0 ℃ txog 70 ℃, qhov tseeb tshaj plaws tuaj yeem ncav cuag 0.05℃.

       ■Dissipation Factor (δ):

Qhov ntsuas ntsuas qhov ntsuas kub ntawm tus kheej, ntsuas hauv mW / ° C (tus nqi qis dua txhais tau tias nws tus kheej qis dua).

       ■Lub sij hawm tsis tu ncua (τ):

Lub sij hawm xav tau rau lub thermistor teb rau 63.2% ntawm qhov kub thiab txias (piv txwv li, 5 vib nas this hauv dej, 20 vib nas this hauv huab cua).

Cov ntsiab lus technical

        ■   Steinhart-Hart Equation:

Tus qauv lej piav qhia txog kev sib raug zoo-kub ntawm NTC thermistor:

(T: Tsis tshua muaj kub, R: Tsis kam, A / B / C: Constants)

       ■   α (Temperature Coefficient):

Tus nqi ntawm kev hloov pauv hloov ib chav tsev kub hloov:

       ■   RT Table (Resistance-Temperature Table):

Ib lub rooj siv qhia txog tus qauv tiv thaiv qhov tseem ceeb ntawm qhov sib txawv ntawm qhov kub thiab txias, siv rau calibration lossis Circuit Court tsim.

3. Cov ntawv thov ntawm NTC Thermistors

Daim ntawv thov teb

        1. Kev ntsuas kub:

                     o   Cov khoom siv hauv tsev (cua txias, tub yees), cov cuab yeej siv, tsheb (cov roj teeb pob / lub cev muaj zog ntsuas kub).

       2. Kev them nyiaj kub kub:

                     oKev them nyiaj rau qhov kub thiab txias ntawm lwm yam khoom siv hluav taws xob (xws li, siv lead ua oscillators, LEDs).

       3. Kev Tiv Thaiv Tam Sim No:

                     oSiv lub siab txias tiv thaiv kom tsis txhob cuam tshuam tam sim no thaum lub zog pib.

Circuit Design Piv txwv

•   Voltage Divider Circuit Court:

(Qhov kub yog xam los ntawm kev nyeem qhov voltage ntawm ADC.)

       •   Txoj kev linearization:

Ntxiv cov resistors ruaj nyob rau hauv series / parallel los ua kom zoo dua qhov tsis yog-linear tso zis ntawm NTC (xws li siv cov duab kos duab).

4. Cov peev txheej thiab cov cuab yeej siv

Cov peev txheej pub dawb

•Cov ntaub ntawv:suav nrog cov ncauj lus kom ntxaws, qhov ntev, thiab cov xwm txheej kuaj.

•RT Table Excel (PDF) Template: Tso cai rau cov neeg siv khoom sai sai nrhiav qhov ntsuas kub-tiv taus.

•Daim ntawv thov:

                     oTsim Kev xav rau NTC hauv Lithium Battery Temperature Protection

                     oTxhim kho NTC Kub ntsuas qhov tseeb los ntawm Software Calibration

Cov cuab yeej online

       • B Tus nqi laij lej:Input T1/R1 thiab T2/R2 los xam tus nqi B.

       •Temperature Conversion Tool: Cov tswv yim tiv thaiv kom tau txais qhov ntsuas kub sib xws (txhawb Steinhart-Hart kab zauv).

5. Cov tswv yim tsim (Rau Engineers)

• Zam tsis txhob ua rau tus kheej ua cua sov:Xyuas kom tseeb tias qhov kev khiav hauj lwm tam sim no qis dua qhov siab tshaj plaws tau teev tseg hauv cov ntaub ntawv (piv txwv li, 10μA).

• Kev Tiv Thaiv Ib puag ncig:Rau qhov chaw ntub dej lossis corrosive, siv iav-encapsulated lossis epoxy-coated NTCs.

• Cov lus pom zoo Calibration:Txhim kho qhov tseeb ntawm qhov system los ntawm kev ua ob lub ntsiab lus calibration (piv txwv li, 0 ° C thiab 100 ° C).

6.Cov lus nug nquag nug (FAQ)

1. Q: Qhov txawv ntawm NTC thiab PTC thermistor yog dab tsi?

                     o   A: PTC (Positive Temperature Coefficient) thermistors nce kev tiv thaiv nrog kub thiab feem ntau siv rau kev tiv thaiv overcurrent, thaum NTC thermistor yog siv rau kev ntsuas kub thiab nyiaj them.

2. Q: Yuav ua li cas xaiv tus nqi B zoo?

                     o   A: High B qhov tseem ceeb (piv txwv li, B25/85 = 4700K) muaj qhov rhiab heev dua thiab tsim nyog rau qhov ntsuas kub ntawm qhov nqaim, thaum qis B qhov tseem ceeb (piv txwv li, B25/50 = 3435K) yog qhov zoo dua rau qhov kub thiab txias.

3. Q: Puas yog xaim ntev cuam tshuam rau kev ntsuas qhov tseeb?

                     oA: Yog, cov xov hlau ntev qhia txog kev tiv thaiv ntxiv, uas tuaj yeem them nyiaj rau kev siv 3-xaim lossis 4-xaim kev sib txuas.