Koj tuaj yeem xaiv txoj cai tshwj xeeb lub hom phiaj thermocouples li cas?

Xaiv qhov tsim nyog tshwj xeeb lub hom phiaj thermocouples hauv qhov nyuaj ntawm kev ntsuas kub rau kev siv tshwj xeeb hu rau kev xav ntau. Cov cuab yeej tshwj xeeb no nyob deb ntawm ib qho - qhov loj me - haum - tag nrho, thiab kev ua tau zoo hauv qee txoj haujlwm nyob ntawm kev paub txog lawv ntau yam ntxwv.
Qhov tseem ceeb tshaj, ib tug yuav tsum nkag siab lub tswv yim tseem ceeb ntawm thermocouples. Lawv ua hauj lwm ntawm Seebeck phenomenon, nyob rau hauv ib tug kub sib txawv ua rau ib tug voltage tsim nyob rau hauv lub hlws ris ntawm ob dissimilar hlau. Tom qab ntawd qhov voltage yog hloov kho kom tau txais qhov ntsuas kub. Tab sis lub hom phiaj tshwj xeeb thermocouples nthuav dav ntawm lub tswv yim no los ntawm kev hloov kho rau qee yam xwm txheej thiab kev xav tau.
Ib qho tseem ceeb uas yuav tau xav txog yog daim ntawv thov qhov kub thiab txias. Kev kub ntxhov siab, suav nrog raws li pom hauv qee qhov kev lag luam xws li kev tsim cov hlau los yog hauv cov ntawv thov dav hlau thaum rov nkag, tso cai rau qhov kub thiab txias mus txog qib siab lossis qis. Piv txwv li, rau lub qhov cub steel, qhov kub yuav nce mus txog 1500 degrees Celsius. Hauv cov xwm txheej no, koj xav tau cov thermocouples ua los ntawm cov ntaub ntawv zoo li tungsten - rhenium alloys uas tuaj yeem tiv taus cov qib kub kub no. Conversely, tshwj xeeb uas tsis tshua muaj kub thermocouples siv cov ntaub ntawv xws li chromel-constantan yog xav tau rau cryogenic siv raws li cov nyob rau hauv tej yam kev tshawb fawb kev tshawb fawb uas muaj liquefied gases, qhov twg kub tej zaum yuav plunge mus rau yuav luag - kiag li xoom. Xaiv cov thermocouple kom raug rau qhov ntsuas kub zoo li xaiv cov cuab yeej raug rau qee yam haujlwm; kev ua haujlwm tsis raug yuav ua rau kev nyeem ntawv yuam kev lossis tej zaum yuav puas rau lub cuab yeej.
Tseem muaj lwm qhov kev txiav txim siab tseem ceeb yog tshuaj lom neeg sib raug zoo. Ntau qhov chaw lag luam tuaj yeem nthuav tawm cov thermocouple rau cov ntaub ntawv corrosive. Cov pa thermocouple nrog cov hlau sheath tuaj yeem cuam tshuam sai sai hauv cov chaw ua tshuaj lom neeg nrog cov kua qaub lossis alkalis. Ib qho ceramic - encased thermocouple yuav yog qhov kev xaiv zoo tshaj, piv txwv li, hauv cov chaw tsim khoom sulfuric acid vim tias cov ceramic muaj kev tiv thaiv zoo rau cov kua qaub corrosive. Ib yam li nyob rau hauv qhov chaw maritime qhov twg dej hiav txwv tuaj yeem ua rau xeb, cov thermocouples nrog cov txheej txheem corrosion-resistant los yog cov ntaub ntawv yuav tsum tau siv. Qhov tseeb tshuaj tiv thaiv tau lav lub neej ntev thiab qhov tseeb ntawm cov thermocouple; Nws yog zoo li arming ib tug tub rog nrog armor muaj peev xwm tiv thaiv tej yam txaus ntshai ntawm battlefield.
Tsis tas li ntawd tseem ceeb heev yog qhov raug thiab precision qauv ntawm daim ntawv thov. Hauv cov haujlwm xws li kev tsim khoom semiconductor lossis kev tshawb fawb kho mob, txawm tias qhov hloov pauv me ntsis tuaj yeem muaj txiaj ntsig zoo. Hauv kev tsim khoom semiconductor, ob peb degree yuam kev thaum lub sijhawm doping tuaj yeem tsim cov chips puas. Nyob rau hauv cov xwm txheej zoo li no, cov thermocouples siab-precision nrog kev txwv kev ntsuas qhov siab yog qhov tseem ceeb heev. Txhua qhov kev ntsuas tseem ceeb hauv cov no, uas zoo li cov khoom siv meej ntawm lub chaw kuaj sim. Qhov tseeb ntawm cov thermocouple nyob ntawm nws cov ntaub ntawv cov qauv thiab kev ua tau zoo nrog rau cov txheej txheem tsim khoom calibration.
Lwm lub ntsiab lus tsis yog yuav tsum tau hais txog yog lub sijhawm teb. Hauv qee qhov kev siv, xws li cov txheej txheem tshuaj sai sai lossis cov tshuab uas hloov pauv sai sai, thermocouple nrog lub sijhawm teb luv luv yog qhov tseem ceeb heev. Ib lub thermocouple uas tuaj yeem ntes tau sai thiab ceeb toom txog qhov hloov pauv yuav tsum tau ua, piv txwv li, nyob rau hauv lub kaw lus kaw thaum muaj xwm txheej ceev ntawm lub tshuab hluav taws xob uas qhov kub ceev nce siab qhia tau tias muaj kev hem thawj. Nyob rau hauv cov xwm txheej zoo li no, lub thermocouple qeeb teb yuav zoo li tus xa xov qeeb tsis tuaj yeem xa cov ntaub ntawv tsim nyog raws sij hawm kom tsis txhob muaj kev puas tsuaj.
Tsis tas li ntawd qhov tseem ceeb yuav yog lub thermocouple lub cev qhov ntev thiab daim ntawv. Ib lub thermocouple me me yuav xav tau hauv cov ntawv thov nrog qhov chaw txwv, suav nrog cov khoom siv me me lossis qee yam khoom siv kho mob. Rau cov cuab yeej phais mob tsawg dua, hais tias lub thermocouple me me tuaj yeem muab tso rau hauv cov ntaub so ntswg kub thaum lub sijhawm phais. Qhov loj me thiab daim ntawv lees paub tias lub thermocouple tuaj yeem raug teeb tsa thiab ua haujlwm hauv cheeb tsam, zoo li muab tus yuam sij rau hauv lub xauv me me.
Tseem ceeb heev kuj yog cov thermocouple cov neeg kho tshuab kev ruaj ntseg thiab lub neej ntev. Ib lub thermocouple tuaj yeem ua rau muaj kev ntxhov siab rau cov neeg kho tshuab yog xav tau nyob rau hauv cov chaw nrog kev vibrations, nrog rau cov chaw tsim khoom nrog cov cuab yeej loj lossis hauv lub cav ntawm lub tsheb. Nyob rau hauv cov xwm txheej no, lub thermocouple ua tau zoo nrog cov mounts muaj zog thiab cov qauv tsim muaj zog yuav tsis tsuas yog muaj sia nyob, tab sis kuj khaws qhov tseeb. Cov neeg kho tshuab kev ncaj ncees ntawm cov thermocouple lav nws qhov kev cia siab, zoo li kev tsim lub tsev ntawm lub hauv paus muaj zog.
Xaiv lub hom phiaj tshwj xeeb uas tsim nyog rau cov thermocouples yuav tsum muaj kev ntsuam xyuas zoo ntawm qhov kub thiab txias, tshuaj lom neeg sib raug zoo, raug, lub sij hawm tshuaj tiv thaiv, lub cev loj, thiab kav ntev. Ua tib zoo saib xyuas cov ntsiab lus no thiab ua kom haum rau cov kev xav tau tshwj xeeb ntawm daim ntawv thov yuav pab kom ntseeg tau tias cov thermocouple yuav muab qhov ntsuas kub kom raug thiab zoo ib yam, yog li tso cai rau kev ua tiav ntawm kev ua haujlwm tshwj xeeb.