Yog tias ntsia tsis raug, qhov yuam kev xws li thermal conductivity thiab lub sijhawm lag luam tuaj yeem tshwm sim, uas yog qhov yuam kev tseem ceeb hauv kev siv cov thermocouples.
1. yuam kev qhia los ntawm kev teeb tsa tsis raug
Lub thermocouple yuav tsum tsis txhob ntsia ze rau ntawm lub qhov rooj thiab qhov chaw cua sov, qhov tob tob yuav tsum yog tsawg kawg yog 8 ~ 10 npaug ntawm txoj kab uas hla ntawm lub raj tiv thaiv, thiab qhov chaw teeb tsa thiab qhov tob tob yuav tsum tsis txhob cuam tshuam qhov kub ntawm qhov cub. . Yog li ntawd, qhov sib txawv ntawm cov thermocouple tiv thaiv raj thiab cov phab ntsa ntawm lub cub tawg yuav tsum tau thaiv nrog cov khoom siv thermal rwb thaiv tsev xws li cov av nkos refractory los yog asbestos hlua kom tsis txhob muaj cov cua txias thiab cua kub thiab cuam tshuam qhov tseeb ntawm qhov ntsuas kub. Kev teeb tsa ntawm cov thermocouples yuav tsum tsis txhob muaj cov hlau nplaum muaj zog thiab cov hluav taws xob muaj zog kom ntau li ntau tau, thiab cov thermocouples thiab fais fab cables yuav tsum tsis txhob muab ntsia rau hauv tib lub raj kom tsis txhob muaj kev cuam tshuam thiab ua rau muaj teeb meem. Thermocouples tsis tuaj yeem ntsia tau rau hauv cov cheeb tsam uas qhov nruab nrab yuav tsum ntsuas tsis tshua ntws, thiab thaum ntsuas qhov ntsuas kub ntawm cov pa hauv lub raj nrog cov thermocouples, cov thermocouples yuav tsum tau muab ntsia rau hauv cov kev taw qhia ntawm qhov khiav ceev thiab nyob rau hauv tag nrho kev sib cuag nrog cov roj.
2. Qhov yuam kev qhia los ntawm kev puas tsuaj ntawm cov rwb thaiv tsev
Piv txwv li, ntau cov av los yog ntsev slag ntawm thermocouple tiv thaiv tube thiab cable phaj ua rau tsis zoo rwb thaiv tsev ntawm lub thermoelectric dipole thiab cov phab ntsa ntawm lub cub tawg, uas yog qhov hnyav dua ntawm qhov kub thiab txias, uas yuav tsis tsuas yog ua rau poob ntawm thermoelectric tej zaum tab sis kuj qhia. cuam tshuam, thiab qhov ua yuam kev tshwm sim qee zaum tuaj yeem ncav cuag ntau pua degrees.
3. yuam kev qhia los ntawm thermal inertia
Cov nyhuv no yog qhov tshwj xeeb tshaj yog pom thaum ua kev ntsuas ceev vim qhov thermal inertness ntawm lub thermocouple, uas ua rau tus nqi qhia ntawm lub 'meter' mus lag tom qab qhov kev hloov ntawm qhov ntsuas kub. Yog li ntawd, cov thermocouples nrog thinner thermodes thiab me me txoj kab uas hla tiv thaiv yuav tsum tau siv ntau li ntau tau. Thaum qhov ntsuas kub ib puag ncig tso cai, lub raj tiv thaiv tuaj yeem raug tshem tawm. Vim qhov kev ntsuas lag luam, qhov amplitude ntawm qhov ntsuas kub hloov pauv tau pom los ntawm cov thermocouple yog me dua li qhov ntsuas kub ntawm lub cub tawg. Qhov ntau dua qhov ntsuas hysteresis, qhov me me ntawm qhov ntsuas kub ntawm cov thermocouple qhov hloov pauv thiab qhov sib txawv ntawm qhov kub ntawm qhov cub. Thaum siv cov thermocouple nrog lub sij hawm loj tas li los ntsuas lossis tswj qhov ntsuas kub, txawm hais tias qhov ntsuas kub ntawm qhov ntsuas ntsuas qhov ntsuas kub hloov pauv me ntsis, qhov ntsuas kub ntawm qhov cub yuav hloov tau zoo heev. Txhawm rau ntsuas qhov ntsuas kub kom raug, cov thermocouples nrog lub sijhawm me me yuav tsum raug xaiv. Lub sij hawm tas li yog inversely proportional rau lub tshav kub hloov coefficient, thiab ncaj qha proportional rau txoj kab uas hla ntawm lub thermocouple kub kawg, qhov ceev ntawm cov khoom thiab cov cua kub tshwj xeeb. Hauv kev siv, cov khoom siv nrog cov thermal conductivity zoo, cov phab ntsa nyias thiab cov kab me me feem ntau yog siv. Hauv kev ntsuas qhov ntsuas kub ntau dua, cov hlau tsis muaj cov thermocouples tsis muaj lub tes tsho tiv thaiv, tab sis cov thermocouples tau yooj yim puas thiab yuav tsum tau ntsuas thiab hloov lub sijhawm.
4. thermal tsis kam ua yuam kev
Thaum qhov kub thiab txias, yog tias muaj txheej txheej ntawm cov hmoov tshauv ntawm lub raj tiv thaiv thiab cov plua plav adheres rau nws, cov thermal kuj nce ntxiv, cuam tshuam cov thermal conduction, thiab qhov ntsuas kub qis dua qhov tseeb ntawm qhov ntsuas kub. Yog li ntawd, sab nraud ntawm lub thermocouple tiv thaiv raj yuav tsum tau ceev kom huv si kom txo tau qhov yuam kev.