Lub hauv paus ntsiab lus ntawm thermocouple ntsuas kub

Lub hauv paus ntsiab lus ntawm thermocouple ntsuas kub
Soldering ob yam khoom sib txawv ntawm cov conductors los yog semiconductors A thiab B ua ke ua ib lub voj voog kaw. Thaum muaj qhov kub thiab txias sib txawv ntawm ob lub ntsiab lus txuas 1 thiab 2 ntawm conductors A thiab B, lub zog hluav taws xob tau tsim los ntawm lawv, uas ua rau muaj qhov sib txawv ntawm qhov sib txawv hauv Circuit Court. Qhov tshwm sim no hu ua cov nyhuv thermoelectric. Thermocouples ua haujlwm los ntawm kev siv cov nyhuv no.
Dab tsi yog thermocouple?
Thermocouples thiab thermal resistances ob leeg yog nyob rau hauv kev sib cuag hom ntsuas kub ntsuas hauv qhov ntsuas kub. Txawm hais tias lawv cov haujlwm zoo ib yam, lawv ntsuas qhov kub ntawm cov khoom, tab sis lawv cov qauv thiab cov yam ntxwv tsis zoo ib yam.
Thermocouples yog dav siv los ntsuas kub hauv kev ntsuas kub. Lawv cov yam ntxwv tseem ceeb yog kev ntsuas dav dav, kev ua haujlwm ruaj khov, cov qauv yooj yim, cov lus teb zoo dynamic, thiab muaj peev xwm xa tawm 4-20mA hluav taws xob teeb liab nyob deb, ua kom yooj yim rau kev tswj tsis siv neeg thiab kev tswj hwm hauv nruab nrab. Lub hauv paus ntsiab lus ntsuas kub ntawm cov thermocouples yog ua raws li cov nyhuv thermoelectric. Thaum ob qhov sib txawv conductors lossis semiconductors txuas rau hauv lub kaw lus kaw, thaum qhov kub ntawm ob qhov sib txuas sib txawv, cov nyhuv thermoelectric lossis Seebeck effect yuav raug tsim tawm hauv Circuit Court. Lub peev xwm thermoelectric generated nyob rau hauv ib tug kaw Circuit Court muaj ob hom muaj peev xwm; Kub qhov sib txawv muaj peev xwm thiab kev sib cuag muaj peev xwm. Thermoelectric muaj peev xwm hais txog qhov muaj peev xwm tsim tawm ntawm ob qhov kawg ntawm tib tus neeg xyuas pib vim qhov kub sib txawv. Cov conductors sib txawv muaj qhov sib txawv ntawm cov hluav taws xob sib txawv, yog li lawv muaj peev xwm tsim tau kuj txawv. Kev sib cuag muaj peev xwm, raws li lub npe qhia, yog hais txog qhov muaj peev xwm tsim tau thaum ob qho sib txawv conductors tuaj rau hauv kev sib cuag thiab tsim ib qho nyiaj ntawm electron diffusion vim lawv qhov sib txawv electron ceev. Thaum lawv ncav cuag ib qho kev sib npaug, lub peev xwm tsim tau, Qhov loj ntawm qhov kev sib cuag muaj peev xwm nyob ntawm cov khoom siv ntawm ob qhov sib txawv conductors thiab qhov kub thiab txias ntawm lawv qhov chaw sib cuag.
Muaj ob hom thermocouple qauv, hom zoo tib yam thiab hom armored. Ordinary thermocouples feem ntau yog tsim los ntawm thermal electrodes, rwb thaiv tsev raj, lub tes tsho tiv thaiv, thiab cov thawv sib txuas, thaum cov khoom siv thermocouples yog cov khoom sib xyaw ua ke ntawm cov xaim thermocouple, cov ntaub ntawv rwb thaiv tsev, thiab lub tes tsho tiv thaiv hlau uas tau sib sau thiab ncab. Txawm li cas los xij, cov teeb liab hluav taws xob ntawm lub thermocouple xav tau ib hom xov hlau tshwj xeeb rau kev sib kis, uas peb xa mus rau cov xaim them nyiaj. Cov thermocouples sib txawv yuav tsum tau them nyiaj sib txawv, thiab lawv lub luag haujlwm tseem ceeb yog txuas nrog lub thermocouple, ua kom qhov kev siv kawg ntawm lub thermocouple kom deb ntawm lub hwj chim qhov chaw, yog li stabilizing qhov kub ntawm qhov kev siv kawg. Cov xov hlau them nyiaj tau muab faib ua ob hom: hom nyiaj them thiab hom txuas ntxiv. Cov tshuaj muaj pes tsawg leeg ntawm cov hlau txuas ntxiv yog tib yam li ntawm cov khoom siv them nyiaj thermocouple. Txawm li cas los xij, hauv kev xyaum, cov xaim txuas ntxiv tsis yog ua los ntawm cov khoom siv tib yam li cov thermocouple, thiab feem ntau yog hloov los ntawm cov xaim nrog tib lub electron ceev raws li cov thermocouple. Kev sib txuas ntawm cov xaim them nyiaj thiab cov thermocouple feem ntau yog qhov tseeb heev. Cov ncej zoo ntawm lub thermocouple yog txuas nrog cov xaim liab ntawm cov xaim them nyiaj, thaum cov ncej tsis zoo txuas nrog cov xim ntxiv. Feem ntau cov xov hlau them nyiaj yog ua los ntawm tooj liab nickel alloy.