Lub hauv paus ntsiab lus ntawm thermocouple kub ntsuas thiab nws daim ntawv thov hauv cov txiv qaub ncaug

Thermocouples yog kev lag luam ib qho ntawm cov feem ntau siv cov kev ntsuas kub ntau, nws qhov zoo yog: ① ntsuas ntsuas qhov raug. Vim tias Thermocouple yog nyob rau hauv kev sib cuag ncaj qha nrog cov khoom raug ntsuas, nws tsis cuam tshuam los ntawm kev ntsuas dav dav nruab nrab. Feem ntau siv thermocouples muaj peev xwm ntsuas tsis tu ncua los ntawm {}}}}}}}}} degree (} degree) yooj yim siv thiab yooj yim siv. Thermocouples feem ntau muaj ntawm ob hom hlau hlau, thiab tsis txwv los ntawm qhov loj me lossis qhib. Lawv muaj tes tsho tiv thaiv sab nraud, ua rau lawv siv yooj yim heev.
1.1 Cov cai ntawm thermocouple kub ntsuas
Weld ob cov khoom sib txawv ntawm cov neeg coj ua lossis cov semiconductors A thiab B ua ke los ua ib qho kev kaw Circuit Court. Thaum muaj qhov sib txawv ntawm ob cov ntsiab lus txuas nrog A thiab B, lub zog hluav taws xob yog tsim ntawm lawv, ua rau muaj qee yam ntawm cov hluav taws xob. Qhov tshwm sim no yog hu ua thermoelectric nyhuv. Thermocouples ua haujlwm los ntawm kev siv cov nyhuv no.
1.2 hom thiab cov qauv ntawm thermocoples
(1) Hom ntawm thermoco
Feem ntau siv thermocouples feem ntau muab faib ua ob pawg: qauv hluav taws xob thiab tsis yog qauv thermocoples. Qauv kho hluav taws xob Thermocoen rau thermocouples uas tau teev nyob rau hauv lub teb chaws tus qauv rau lawv txoj kev sib raug zoo ntawm thermoelectric muaj peev xwm thiab kub, thiab muaj kev sib koom ua ke ntsuas. Tsis tau qauv thermocotres tau siv nyob rau hauv qee qhov ntau lossis cov kev txiav txim ntawm qhov ntau piv rau cov lus qhia hluav taws xob, feem ntau yog siv rau kev ntsuas hauv qee lub sijhawm tshwj xeeb,
(2) cov qauv txheej txheem ntawm thermocouple
Txhawm rau kom ntseeg tau tias txoj kev ntseeg siab thiab ruaj khov ua haujlwm ntawm thermocouple, nws cov qauv tseev kom muaj raws li hauv qab no:
① vuam ntawm ob lub thermoelectric cov ntaub ntawv uas ua rau ib thermocouple yuav tsum yog khov kho
Yog ob lub thermoelectric cov hluav taws xob yuav tsum tau zoo insulated los ntawm ib leeg los tiv thaiv luv luv circuits;
③ Qhov kev sib txuas ntawm cov hlau roj teeb thiab qhov kawg ntawm lub thermocouple yuav tsum yooj yim thiab ntseeg tau;
④ Tes Tsho Tiv Thaiv yuav tsum ua kom muaj kev sib cais txaus ntawm lub thermoelectric electrode thiab kev phom sij.
(3) nyiaj them rau qhov ntsuas kub ntawm thermocouple qhov kawg
Vim yog qhov tseeb tias cov ntaub ntawv ntawm thermocouples feem ntau kim (cov xov tooj tsis tshua muaj zog) Nws yuav tsum tau taw qhia tias tus nqi them nyiaj Thermocouple tsuas yog pabcuam rau txuas ntxiv ntawm Thermocouple txav mus rau qhov ntsuas davhlau ya nyob hauv chav tswj hwm. Nws tus kheej tsis tuaj yeem tshem tawm cov cawv ntawm qhov kub ntawm qhov txias ntawm qhov txias txias rau ntawm ntsuas kub thiab tsis muaj kev them nyiaj. Yog li ntawd, lwm txoj kev kho kom tau yuav tsum tau them rau qhov cuam tshuam rau qhov cuam tshuam ntawm txias txias hloov ntawm qhov ntsuas kub.
Thaum siv Thermocule Them Nyiaj xaim, kev saib xyuas yuav tsum tau them rau cov qauv sib txuam, thiab qhov ntsuas kub ntawm qhov kev them nyiaj xaus ntawm cov xaim xaim thiab thermocouple tsis tau tshaj 100 degree.
(4) Kev faib tawm ntawm cov ntsuas kub ntsuas ntsuas
Qhov ntsuas kub ntsuas tau muab faib ua ob pawg raws li kev ntsuas ntsuas kub raws cov kev ntsuas ntsuas: Hu rau thiab tsis sib cuag. Feem ntau hais lus, hu rau cov twj kub ntsuas kub yog qhov yooj yim, txhim khu kev qha, thiab muaj ntsuas siab yog qhov tseeb; Txawm li cas los xij, vim qhov kev xav tau rau kev hloov pauv kom txaus ntawm qhov kub thiab txias, thiab qhov xav tau rau lub sijhawm ntsuas kub, thiab qhov kev ntsuas ntsuas hluav taws xob, muaj kev ntsuas ntsuas kub. Nyob rau tib lub sijhawm, vim muaj cov kev txwv ntawm cov khoom kub kub-resistant cov ntaub ntawv, nws tsis tuaj yeem siv rau kev ntsuas kub kub heev. Qhov ntsuas tsis tau sib cuag kub ntsuas yog ua raws cov hauv paus ntsiab lus ntawm thermal hluav taws xob los ntsuas kub. Qhov ntsuas kub ntsuas lub caij tsis tas yuav muaj kev sib cuag nrog ntsuas ntsuas ntsuas, muaj qhov ntsuas kub ntau, thiab tsis puas tsuaj rau qhov ntsuas kub ntawm cov khoom ntsuas ntsuas. Cov tshuaj tiv thaiv ceev feem ntau ceev ceev; Txawm li cas los xij, vim muaj sab nraud yam ntxwv xws li emissivy ntawm cov khoom, ntsuas kev deb, pa ncho pa thiab dej ntsuas qhov yuam kev yog loj.
Daim ntawv thov ntawm ob thermocouples hauv cov txiv qaub ncu
2.1 Cov xwm txheej uas thermohouples yuav tsum tau raws thaum siv roj teeb cov kua qaub ncaug
1) cov cim hnyav uas yuav tsum ua kom tau qhov ntsuas qhov hnyav;
2) Cov teeb liab tso zis tau yooj yim rau cov txheej txheem yooj yim;
3) Drift thiab lub sijhawm hloov pauv kuj yog me me, thiab muaj interchangeability;
4) Tsis nkag siab rau lub cev muaj pes tsawg dua li kub
5) luaj me me, yooj yim rau nruab;
6) muaj cov khoom siv zoo, tshuaj lom neeg, thiab hluav taws xob tiv thaiv cov khoom;
7) Muaj kev nyab xeeb thiab tsis muaj tshuaj lom.
2.2 Cov Lus Qhia Yuam Kev thiab Kev Ceev Faj rau Thermocouple Nrhiav tau
1) Yog hais tias cov txheej txheem sib dhos ntawm lub sensor yog tsis raug, nws yuav ua rau qhov kub ntawm lub sensor kom sib txawv ntawm kev ntsuas kub;
2) Ua tib zoo saib xyuas qhov kub siab tshaj plaws thiab tso cai ua yuam kev ntawm lub sensor;
3) Ua tib zoo mloog rau lub sijhawm ua haujlwm ntawm sensors;
4) Cov nqi them nyiaj thiab cov nyiaj hloov tshiab ntawm thermocouples tuaj yeem ua rau tsis raug;
5) Muaj kev saib xyuas yuav tsum tau them nyiaj rau qhov yuam kev ntawm kev sim cov cuab yeej.
2.3 Qhov cuam tshuam ntawm Thermocouple siv ntawm ib puag ncig ib puag ncig
1) Sib Nqus Teb
Cov khoom siv thermocouple tau tuaj yeem hloov cov qauv kev hloov pauv hauv qhov chaw siab uas muaj kev ncua ib puag ncig omic, thiab kuj tseem tuaj yeem ntsib kev ua haujlwm ntau dua hauv cov tsheb uas muaj kev kub siab ntxiv. High voltage cov khoom siv tuaj yeem tsim kom raug thiab npaj tau tsim nyog rau kev ntsuas sov rau hluav taws xob kom txo qis nws qhov kev cuam tshuam.
2) nuclear hluav taws xob
Thermocouple cov ntaub ntawv, nyob rau hauv thermiation ntawm thermal neutrons kev hloov pauv vim tias kev hloov pauv ntawm cov khoom siv isotopes, uas yuav ua rau lwm yam. Yog li no, cov ntaub ntawv thermocouple nrog me me neutron cross-sections thiab tsis muaj isotopes raug xaiv.