Dab tsi yog thermocouple thiab dab tsi yog txoj haujlwm ntawm ib thermocouple

Thermocouples yog ib qho ntawm cov feem ntau siv cov kev kub siv kub thiab siv tau feem ntau siv tau cov khoom sib xyaw hauv kev lag luam. Nws cov txiaj ntsig yog:
① ntsuas siab ntsuas qhov yog. Vim tias Thermocouple yog nyob rau hauv kev sib cuag ncaj qha nrog ntsuas ntsuas thiab tsis cuam tshuam los ntawm cov nruab nrab hauv nruab nrab.
Tsis tshua muaj kev ntsuas ntau yam. Feem ntau siv thermocouples muaj peev xwm ntsuas tsis tu ncua los ntawm {}}}} {}}}} degree (xws li tungsten rhenium).
Siv kev siv tau yooj yim thiab siv tau yooj yim. 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. Cov txheej txheem yooj yim ntawm cov ntsuas cua sov ntawm thermocouple
Weld ob cov khoom sib txawv ntawm cov khoom sib txawv lossis cov semiconductors A thiab B ua ke los ua cov duab kaw, raws li qhia hauv daim duab 2-1-1. Thaum muaj qhov sib txawv ntawm ob qho tib si txuas cov ntsiab lus 1 thiab 2 ntawm kev coj ua A thiab B, lub zog hluav taws xob tau tsim los ntawm lawv, uas ua rau muaj qee qhov ntau ntawm cov hluav taws xob. Qhov tshwm sim no hu ua thermoelectric nyhuv. Thermocouples ua haujlwm los ntawm kev siv cov nyhuv no.
2. Hom thiab cov qauv tsim ntawm thermocouples
(1) Hom ntawm thermoco
Feem ntau siv thermocouples feem ntau muab faib ua ob pawg: qauv thermocoorples thiab cov thermoco zog. Tus txheem thermocouple raug xa mus rau qhov thermocouple uas muaj lub teb chaws muaj peev xwm qhia txog kev sib raug zoo thiab kub, tso cai rau qhov yuam kev, thiab muaj cov qauv kev sib koom tes. Nws muaj cov khoom sib txuam tso tawm rau kev xaiv. Tsis yog qauv thermocoen tsis yog raws li dav siv lossis ntawm tib qho kev txiav txim ntawm qhov ntau li qauv thermoco, thiab feem ntau tsis muaj kev sib koom tes ntawm cov lus sib txuas lus. Lawv feem ntau yog siv rau kev ntsuas hauv qee lub sijhawm tshwj xeeb. Txij li Lub Ib Hlis 1, 1988, txhua qhov thermocoter thiab cov cua sov hauv Suav teb tau tsim los raws li IEC cov qauv thermoco, thiab t tau raug xaiv raws li kev tsim qauv thermocouples hauv Suav teb.
(2) Txhawm rau kom ntseeg tau tias txoj kev ntseeg siab thiab ruaj khov ntawm thermocoumles, cov cai kom muaj rau lawv muaj raws li hauv qab no:
① vuam ntawm ob lub thermoelectric cov hluav taws xob uas ua rau cov 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. Qhov ntsuas kub ntawm thermocouple txias 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 kev them hluav taws xob ntawm Thermocouple electrode thiab txav qhov txias txias ntawm thermocouple mus rau lub ntsuas lub davhlau ya nyob hauv chav tswj hwm. Nws 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 kho yuav tsum tau siv los them rau qhov cuam tshuam rau qhov cuam tshuam ntawm txias txias t} {}}} {}} 0 degree rau ntawm 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.
2, Daim Ntawv Thov Kev Thov ntawm Thermal Kuj
Tus thermistor yog ib qho kev siv ntsuas kub feem ntau hauv qhov nruab nrab thiab qhov kub tsawg.
Nws cov yam ntxwv tseem ceeb yog qhov ntsuas siab yog qhov tseeb thiab ruaj khov ua haujlwm. Ntawm lawv, Platinum tsis kam muaj qhov ntsuas siab tshaj plaws, thiab nws tsis yog tsuas yog siv dav hauv kev lag luam kub, tab sis kuj tau ua rau hauv ib qho kev ntsuas kub.
1. Lub hauv paus ntsiab lus thiab cov ntaub ntawv ntawm kev ntsuas kub ntsuas kub
Thermal kuj ntsuas kub yog raws li tus yam ntxwv uas cov nqi tiv thaiv ntawm cov hlau uas nce nrog ntsuas kub. Tus cua kub feem ntau yog ua los ntawm cov ntaub ntawv hlau ntshiab, nrog platinum thiab tooj liab tau siv feem ntau. Ib qho ntxiv, cov ntaub ntawv xws li Dian, npib tsib xee, manganese, thiab rhodium tau pib siv cov thermistors.
2. Txheej Txheem Ntawm Thermal Kuj
(1) Cov qauv thiab cov yam ntxwv ntawm cov tshuab cua kub siv (resistors kub sensing ntsiab (resistors (resistors) hauv cov thermistor kev lag luam tau qhia hauv Table {1}}. Raws li cov ntsiab lus ntsuas kub ntawm cov thermal kuj, qhov hloov pauv ntawm qhov ntsuas kub ntsuas tau ntsuas los ntawm kev hloov pauv ntawm cov thermal kuj. Yog li no, kev hloov pauv ntawm kev tawm tsam ntawm ntau cov xov hlau xws li cov hlau le ntawm cov kav hlau ua ntawm lub thermal kuj lub cev yuav muaj kev cuam tshuam rau kev ntsuas kub. Txhawm rau tshem tawm cov cawv ntawm txhuas tsis kam, peb xaim lossis plaub lub tshuab hlau feem ntau siv. Rau cov ntsiab lus tshwj xeeb, thov saib rau Tshooj * ntawm tshooj 3 ntawm tsab xov xwm no
(2) cov cua nab kuab cua nab kuab cua nab hau yog lub cev muaj zog (resistion), ua rau cov ntaub ntawv rwb thaiv tsev, thiab qhia hauv daim duab {1}}. Nws txoj hlab hlau sab nraud feem ntau yog 2 thiab 8 hli, nrog qhov tsawg tshaj plaws tau txog 8 hli.
Piv nrog cov cua nab kuab, nws muaj qhov loj me me: ① me me, tsis muaj cua gap sab hauv, qis kev ntsuas lav nyob rau hauv cov lus ntawm thermal inertia; ② Qhov kev ua tau zoo heev, kev co ua kom tau, thiab kev tiv taus kev tawm tsam; Bend, yooj yim rau nruab, thiab muaj lub neej ntev kev pabcuam.
(3) Xaus lub ntsej muag kawg kub kub lub caij kub ua rau cov ntsuas kub kawg ntawm lub ntsej muag, thiab nws cov qauv tau qhia hauv daim duab {1}}. Piv nrog dav dav axial kuj yog qhov ntsuas kub, nws tuaj yeem yog qhov tseeb thiab nrawm nrawm ntawm qhov ntsuas kub kawg ntawm kev coj tus kheej thiab lwm yam.
(4) tawg pov thawj Thermoelectric sib txawv ntaus hom hluav taws xob rau hauv lub taub hau los yog arcs nyob rau hauv lub thawv tshwj xeeb, yog li kom tsis txhob ua rau ntau qhov tawg hauv qhov chaw ntau lawm. Tawg cov ntawv pov thawj thermal tuaj yeem siv rau kev ntsuas kub hauv thaj chaw nrog cov phom sij hauv bla ~ B3C chav kawm.
3. Kev sib xyaw ntawm cov ntsuas cua sov ntsuas kub
Qhov ntsuas cua sov ntsuas hluav taws xob ntsuas kub feem ntau muaj cov cua nab kuab, txuas xov hlau, thiab cov khoom siv zaub. Ob lub ntsiab lus hauv qab no yuav tsum tau sau tseg:
① Qhov ntsuas nplai ntawm cov thermistor thiab tso saib cov khoom siv yuav tsum muaj xwm txheej
② Txhawm rau tshem tawm cov cawv ntawm kev hloov pauv ntawm cov xov hlau tsis kam sib txuas, ib txoj kev txuas hlau yuav tsum yog saws. Thov saib Tshooj 3 ntawm tsab xov xwm no rau cov ntsiab lus tshwj xeeb.
(2) cov cua nab kuab cua nab kuab cua nab hau yog lub cev muaj zog (resistion), ua rau cov ntaub ntawv rwb thaiv tsev, thiab qhia hauv daim duab {1}}. Nws txoj hlab hlau sab nraud feem ntau yog 2 thiab 8 hli, nrog qhov tsawg tshaj plaws tau txog 8 hli. Piv nrog cov cua nab kuab, nws muaj qhov loj me me: ① me me, tsis muaj cua gap sab hauv, qis kev ntsuas lav nyob rau hauv cov lus ntawm thermal inertia; ② Kev ntsuas kev ua tau zoo, kev co ua kom tau, cuam tshuam, muaj lub neej muaj peev xwm siv tau yooj yim.
(3) Xaus lub ntsej muag kawg kub kub lub caij kub ua rau cov ntsuas kub kawg ntawm lub ntsej muag, thiab nws cov qauv tau qhia hauv daim duab {1}}. Piv nrog dav dav axial kuj yog qhov ntsuas kub, nws tuaj yeem yog qhov tseeb thiab nrawm nrawm ntawm qhov ntsuas kub kawg ntawm kev coj tus kheej thiab lwm yam.
(4) tawg pov thawj thermoelectric hom cua sov siv cov qauv tshwj xeeb ntawm cov pa sib xyaw kom tshem tawm cov dej sib xyaw hauv nws lub plhaub. Yog hais tias lub resistor yog puas los ntawm cov txim taws lossis arcs, qhov ntev ntawm cov hlau tsis kam yuav tsum tau hloov pauv, uas yuav cuam tshuam rau tus nqi tiv thaiv. Yog li ntawd, nws yog qhov zoo dua los hloov lub resistor nrog ib qho tshiab. Yog tias siv tshuaj ntsuam yog siv, nws yuav tsum tau txheeb xyuas kom muaj kev tsim nyog tom qab vuam ua ntej siv