Dab tsi yog qhov kub thiab txias nyob rau ntau hom thermocouples?

Thermocouples yog qhov tseem ceeb kub ntsuas cov khoom siv ntau yam ua haujlwm ntau yam nyob hauv ntau cov haujlwm. Hom sib txawv ntawm cov thermocouples yog npaj ua haujlwm tsis pub dhau cov kev ntsuas kub thiab kev nkag siab tseem ceeb rau kev tshuaj xyuas thiab saib xyuas qhov kub.
Ib qho ntawm feem ntau siv thermocouples yog K-hom thermocouple. Nws yog tsim los ntawm kev sib xyaw ntawm npib tsib xee-chromium thiab npib tsib xee-alumel. Lub K-Hom Thermocouple muaj cov laj thawj loj, feem ntau khiav ntawm -200 degree rau 1372 degree. Qhov no dav spectrum tsim nyog rau kev siv ntau yam. Nws tuaj yeem khiav lub freezer qis hauv kev ua khoom noj ua khoom noj xws li ntau dua qhov kub thiab txias siv hauv kib thiab ci ua haujlwm. Nws yog feem ntau siv nyob rau hauv cov chaw muaj kev lag luam kom taug qab cov cua sov, tshuab, thiab lwm yam iav khiav hauv qhov ntsuas kub no.
Lwm hom yog J-hom thermocouple ua los ntawm constanoan thiab hlau. J-hom thermocouple khiav roughly los ntawm -210 degree rau 760 degree. Cov ntawv thov uas xav tau qhov ntsuas kub tsawg dua - xws li cov tshuab tub yees thiab qee cov haujlwm tshuaj-feem ntau hu rau nws. Lub J-hom thermocouple, piv txwv li qhia qhov kub thiab txias ntawm cov khoom lag luam txias kom lawv nyob hauv qhov kev sib haum xeeb los khaws lawv cov khoom zoo.
Ua los ntawm tooj liab thiab constantan, t-hom thermocouples muaj koob meej rau lawv txoj kev yoog tau nyob rau hauv kev siv kub tsawg. Qhov kub ntawm -270 degree thiab 400 degree yog nyob rau hauv ncav cuag rau lawv. Cryogenic kev tshawb fawb ua tau zoo siv cov thermocouples txij li tsawg kub yuav tsum tau saib ncaj qha. T-hom thermolouples tuaj yeem yog qhov tseem ceeb hauv kev ua kom muaj kev ncaj ncees ntawm qee cov tshuaj uas xav tau qhov ntsuas kub qis los ntawm kev soj ntsuam qhov kub ntawm kev ntsuas chaw.
Ua los ntawm cov npib tsib xee-chromium thiab constantan, e-hom thermoroileodles muab ib co ntsuas kub ntawm {2}} degree thiab 1000 degree. Lawv tau siv nyob rau hauv cov xwm txheej uas ib tug yuav tuaj hla ob qho siab tsawg thiab qhov kub siab. E-hom thermocouples pom cov ntawv thov nyob rau hauv lub chaw kho tsheb thiab kev ntsuas ntawm lub cav txias cov 'kub thiab kub kom ncav tau qib siab.
R-hom thiab S-hom thermocots yog qee zaum xaiv rau kev siv kub siab. Ua los ntawm platinum thiab 13% rhodium, tus ntaus thermocouple ntsuas kub txog li 1768 degree; Ua los ntawm platinum thiab 10% rho tawm, S-hom thermocouple ua ib yam li ntawd. Cov kev tshawb fawb thermocouples no hauv qee qhov kev tshawb fawb kev tshawb fawb kub-kub ntawm kev tsim khoom zoo li hauv iav tsim, uas melting ntawm iav hu kom kub heev.
Thaum kawg, muaj tungsten-rhenium thermocouples, ua kom wallort ntau qhov kub. Kub kub los ntawm ntxhib 0 degree rau 2300 degree yog ntsuas los ntawm lawv. Cov ntawv thov zoo li smelting ntawm cov hlau, qhov twg kub yuav ncav tau qib siab, thiab hauv cov dav hlau siv rau kev ntsuas dav dav hauv hluav taws xob tungsten-rhenium thermocouples.
Txhawm rau xaiv cov cuab yeej tsim nyog rau cov ntawv thov muab, ib qho yuav tsum xub paub txog ntau yam kub ntawm ntau hom thermocoples. Txhua yam ntawm Thermocouple muaj cov kev tshwj xeeb thiab muaj peev xwm uas ua kom pom qhov kub thiab txias saib xyuas thoob plaws cov haujlwm thiab chaw pw ib puag ncig. Los ntawm kev xaiv txoj cai thermocouple raws li qhov yuav tsum muaj kev ua tau zoo, muaj kev nyab xeeb, thiab kev ua tau zoo ntawm lawv cov txheej txheem.