ImiGaqo yobuGcisa yeSensoni yeThermistor ye-NTC

Ixabiso elinguziro lokuxhathisa amandla RT (Ω)

I-RT ibhekisela kwixabiso elichasayo elilinganiswe kwiqondo lokushisa elichaziweyo T usebenzisa amandla alinganisiweyo abangela ukuba utshintsho olungenamsebenzi kwixabiso lokumelana ngokubhekiselele kwimpazamo yokulinganisa iyonke.

Unxulumano phakathi kwexabiso lokuchasa kunye nokutshintsha kobushushu bamacandelo e-elektroniki ngolu hlobo lulandelayo:

RT = RN expB(1/T – 1/TN)

RT: NTC ukumelana thermistor kwiqondo lobushushu T (K).

RN: NTC ukuxhathisa thermistor kwiqondo lobushushu elilinganisiweyo TN (K).

T: Ubushushu obuchaziweyo (K).

B: Material constant of NTC thermistor, also known as thermal sensitivity index.

exp: i-exponent esekelwe kwinani lendalo e (e = 2.71828…) .

Ubudlelwane bunobungqina kwaye buneqondo lokuchaneka kuphela kuluhlu olulinganiselweyo lobushushu obulinganiselweyo be-TN okanye ukuxhathisa okulinganiselweyo nge-RN, kuba i-mathiriyeli engaguqukiyo ingu-B ngokwayo ingumsebenzi wobushushu be-T.

Ilinganiswe kwi-Zero Power Resistance R25 (Ω)

Ngokomgangatho wesizwe, ixabiso elilinganisiweyo lokuxhathisa amandla li-zero lixabiso lokumelana ne-R25 elilinganiswa ne-NTC thermistor kwiqondo lobushushu lereferensi ye-25 ℃.Eli xabiso lokuxhathisa lixabiso eliqhelekileyo lokumelana ne-NTC thermistor.Ngokwesiqhelo uthe i-NTC thermistor ingakanani ixabiso loxhathiso, ikwabhekisa kwixabiso.

IMaterial Constant (isalathisi sobuntununtunu be-thermal) ixabiso le-B (K)

Amaxabiso B achazwa ngolu hlobo:

I-RT1: Ukumelana namandla okuziro kwiqondo lobushushu T1 (K).

I-RT2: Ixabiso le-Zero lokumelana namandla kwiqondo lokushisa T2 (K).

T1, T2: Amaqondo obushushu amabini achaziweyo (K).

Kwii-thermistors ze-NTC eziqhelekileyo, ixabiso le-B lisuka kwi-2000K ukuya kwi-6000K.

Zero Power Resistance Temperature Coefficient (αT)

Umlinganiselo wotshintsho olwenziwayo kwi-zero-power resistance ye-NTC thermistor kwiqondo lobushushu elichaziweyo kutshintsho lobushushu olubangela utshintsho.

I-αT: i-zero amandla okumelana nomlinganiselo wobushushu kwiqondo lobushushu T (K).

I-RT: Ixabiso lokunganyangeki kwamandla angu-Zero kwiqondo lokushisa T (K).

T: Ubushushu (T).

B: Izinto eziphathekayo.

I-Coefficient yokuchitha (δ)

Kwiqondo lokushisa elichaziweyo le-ambient, i-coefficient yokutshatyalaliswa kwe-NTC thermistor ngumlinganiselo wamandla achithwayo kwi-resistor ukuya kwinguqu ehambelanayo yokushisa kwe-resistor.

δ : i-coefficient yokulahla ye-NTC thermistor, (mW/ K).

△ P: Amandla asetyenziswa yi-NTC thermistor (mW).

△ T: I-thermistor ye-NTC isebenzisa amandla △ P, utshintsho oluhambelanayo lobushushu bomzimba we-resistor (K).

Ixesha leThermal Constant of Electronic Components (τ)

Ngaphantsi kweemeko zamandla zero, xa iqondo lokushisa litshintsha ngokukhawuleza, iqondo lokushisa le-thermistor litshintsha ixesha elifunekayo kwi-63.2% yeenguqu ezimbini zokuqala zokushisa.Ixesha le-thermal elingaguqukiyo lilingana nomthamo wobushushu we-NTC thermistor kwaye ngokuphambeneyo ulungelelwaniso lwe-coefficient yokulahla.

τ : ixesha le-thermal elingatshintshiyo (S).

C: Umthamo wobushushu we-NTC thermistor.

δ : i-coefficient yokulahla ye-NTC thermistor.

Ilinganiswe Power Pn

Ukusetyenziswa kwamandla okuvumelekileyo kwe-thermistor ekusebenzeni ngokuqhubekayo ixesha elide phantsi kweemeko zobugcisa ezichaziweyo.Ngaphantsi kwala mandla, ukushisa komzimba okuchasayo akudluli ubushushu bayo bokusebenza.

Ubushushu bokusebenza okuphezuluTmax: ubushushu obukhulu apho i-thermistor inokusebenza ngokuqhubekayo ixesha elide phantsi kweemeko zobugcisa ezichaziweyo.Oko kukuthi, T0- Ubushushu be-Ambient.

Amacandelo ombane wokulinganisa amandla Pm

Kwiqondo lokushisa elichaziweyo le-ambient, ixabiso lokumelana nomzimba ochasayo ovuthayo ngumlinganiselo wangoku unokungahoywa ngokubhekiselele kwimpazamo yokulinganisa iyonke.Ngokuqhelekileyo kufuneka ukuba utshintsho lwexabiso lokumelana lukhulu kune-0.1%.