Kev siv cov xov tooj thermocouple hauv kev ntsuas kub ntsuas

Thermocouple them cov xov hlau tau siv dav hauv kev ntsuas kub ntsuas kub. Yog tias koj nkag siab lub hauv paus ntsiab lus, ua haujlwm, txoj kev ntawm kev nqis tes ua, thiab kev ceev faj ntawm kev them nyiaj ntawm ThermoculePle, txwv tsis pub nws yuav rov qab. Hauv kev lag luam ntau lawm, tab sis cov kev ntsuas kub thiab ntsuas kom haum thiab ntsuas qhov ntsuas tau, yog tias muaj mob hnyav, ncaj qha ua rau muaj kev lag luam poob qis. Yog li ntawd, nws yuav tsum tau ua tiag tiag.
1, Taw Qhia Rau Qhov Ntsuas Kub Ntsuas Cov Ntsiab Cai Ntawm Thermoco
Ib qho kev tsim ntawm ob hom kev sib txawv homogeneous A thiab B yog hu ua thermocouple. A. Cov ntsiab lus sib cuag txuas rau ntawm ob qho kawg ntawm cov khoom b yog sawv cev los ntawm J1 thiab J2 feem. Yog tias qhov kub T1 thiab T2 ntawm kev tiv toj cov ntsiab lus ntawm J1 thiab J2 sib txawv, hluav taws xob yuav tsim los ua lub peev xwm thermoelectric Thaum ib qho khoom siv ntawm B - Sijhawm, qhov ntau ntawm Thermoeltricric muaj peev xwm nyob ntawm qhov sib txawv ntawm T1 thiab T2, qhia los ntawm cov qauv raws li cov qauv
EAB (T1, T2) {{{= Eb (T1) + Eba (T1) -ab (T2) (1)
Hauv cov qauv: EAB (T1, T2) yog qhov thermocouple ntawm bermoelectric muaj peev xwm sib txawv ntawm qhov kub thiab t2.
EAB (T1) - Lub peev xwm ntawm taw tes b thaum qhov kub yog T1.
EAB (T2), eba (T1) - ib lub peev xwm nyob rau kis kub T2 yog sib npaug thiab sib luag hauv kos npe.
Txhawm rau koom ua ke cov ntaub ntawv thermocouple thiab qauv rau lawv cov khoom siv ntawm cov khoom siv ntawm cov khoom siv ntawm cov khoom siv ntawm cov khoom siv sawv cev ntawm no yog t 0, thiab ntau hom kev ntsuas hluav taws xob ntau dua yog tsim rau kev siv tau yooj yim thiab suav.
Piv rau daim foos hauv daim duab 1, cov mis (1) yog hloov mus rau hauv
EAB (TI, T2) {{{= EAB (T1, t}) - EAB (T2, t}) (2)
Cov mis (2) yog cov qauv siv tam sim no tam sim no peb siv tam sim no, ntev npaum li peb paub T1 T2, EAB (T2, t}) tuaj yeem pom los ntawm cov lus tiav.
Ob lub xov tooj thermocouple
Firstly, cia tshuaj xyuas cov kev sib txuas ntawm txoj cai lij choj thiab kev sib tham ntawm txoj cai ntsuas kub ntawm thermoco.
Hauv kev siv cov kev thov, muaj ib txwm muaj kev deb ntawm kev ntsuas ntsuas thiab ntsuas cov twj paj nruag thiab thermocoping. Cov ntaub ntawv c thiab d nyob hauv nruab nrab kuj yog ob hom kev ua homogeneous. Raws li txoj cai ntawm kev saib xyuas kev sib tham hauv thermediate hauv thermoco, qhov hais tawm rau ntsuas ntsuas tau ntau dua EZ tuaj yeem muab tau raws li hauv qab no:
Ez {= EAB (T1, T1, T3) + ECD (T2) (3)
Kab zauv (3) yog txoj cai ntawm Thermocouple kev txuas txuas tus txiv neej. Yog tias qhov kev sib txuas tsis nyob hauv ib ntu, tag nrho cov peev xwm EZ tseem yog qhov suav ntawm txhua ntu. Hauv kev ntsuas, peb cia siab tias tag nrho cov peev xwm ntawm kev ntsuas qhov kawg yog kev tswj hwm qhov ntsuas ntsuas ntsuas kom muaj peev xwm ntxiv los ntawm kev sib txuas hauv nruab nrab. Cov lus qhia yog:
EB (T1, T2) {{{= {}} EAS EAB (T3, T2) (4)
Hauv kev sib npaug (4), T3 tau raug xa mus rau qhov kub nyob nruab nrab, li no nws thiaj paub tias nws yog qhov kub ntawm nruab nrab. Qhov no yuav tsum tau nrhiav qee yam khoom CD, nws cov yam ntxwv yog:
ECD (T3, T2)=EAB (T3, T2) (5)
Cov ntaub ntawv uas txaus siab sib npaug (5) yog hu ua cov xaim hluav taws xob ntawm thermocouple. Vim tias muaj ntau hom thermocouples, kuj tseem muaj ntau hom mob thermocouple nyiaj them.
3, cov kev ua yuam kev hauv kev siv cov xov tooj ntawm cov xov tooj thiab cov khoom yuam kev
1. Txuas qhov zoo thiab tsis zoo ntawm lub thermocouple them hlau nyob rau rov qab nrog thermocouple
Yog tias qhov zoo thiab tsis zoo ntawm cov khoom them nyiaj xaim hluav taws xob nrog cov ntsuas hluav taws xob zoo thiab tsis zoo thiab tsis zoo thiab tsis zoo K-hom thermocouple piv txwv. Qhov kev ua yuam kev no muaj ntau yam nyob rau hauv cov ntawv thov vim tias qhov kub hloov pauv hloov pauv ntawm cov khoom tswj tau zoo sib xws nrog cov twj tso saib. Ntxiv mus, ntau yam nyiaj Thermocouple cov hlau lag luam cov khoom lag luam uas tsis muaj qhov cim tsis yooj yim; Qee cov tuam ntxhab tseem sau cov xim tsis raug. Hauv qab no yog kev txheeb xyuas ntawm qhov yuam kev tshwm sim los ntawm qhov xwm txheej no.
Yog hais tias txuas nrog kom raug, tag nrho cov peev thermoelectric muaj peev xwm tau txais los ntawm lub ntsuas yog
Ez=ek (ti, t3) + t3) {{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{{
Vim tias qhov kev sib txuas ua yuam kev, raws li kev cai lij choj ntawm kev coj mus saib xyuas nruab nrab, tag nrho cov peev thermoelectric muaj peev xwm tau txais los ntawm lub ntsuas yog
Ez=ek (T1, T1, T3) + EKX (T3, T2) (7)
Rau KX txuas ntxiv them cov xov hlau, muaj
E'KX (T3, T2) {{{{=- Ekx (T3, T2) {5} {{5, T2) (8)
Xam cov tsim tawm yuam kev los ntawm cov ntsuas ntsuas ntsuas tus nqi
Ez'-ez {= ek (t1, t3) -k (t3) {{{{{{} {{{{
Qhov kub nyob ze lub tshuab cua muaj muaj tsawg kawg yog 8 qib siab dua qhov kub hauv chav tswj. Yog li qhov ua yuam kev yog raws nraim li ob zaug them nyiaj ntawm cov xaim hluav taws xob. Rau K-ntaus thermocouples, cov nqi sib txawv feem ntau nyob ib puag ncig 40c / (μ v), thiab ntsuas qhov ntsuas kub yog kwv yees li 16 degree dua li qhov ntsuas kub tiag tiag. Yog tias qhov ntsuas kub yog teeb tsa ntawm 600 degree, qhov tseeb kub yuav tsum nyob ib ncig ntawm 616 degree.
Los ntawm cov kev soj ntsuam saum toj no, nws tuaj yeem pom tau tias lub qhov zoo thiab tsis zoo rau kev them nyiaj, tab sis kuj tseem ua rau qhov ua yuam kev piv rau tsis txuas cov xaim xaim. Yog li ntawd, kev polarity ntawm cov hlau them yuav tsum tau coj mus rau hauv tus account thaum txuas nws.
2. Cov nqi xov tooj tau siv tsis raug
Yog hais tias tib hom kev them nyiaj hlau tau ua khub nrog tib hom thermocouple, yuam kev tseem yuav tshwm sim yog tias hom kev them nyiaj hlau tsis raug. Piv txwv tias yog S-hom Thermocouple yog siv, cov nyiaj them rau KX ntawm K-hom thermocouple yog xaiv.
Raws li kev cai lij choj ntawm kev saib xyuas nruab nrab, tag nrho cov peev thermoelecric muaj peev xwm tau txais los ntawm lub ntsuas yog
E'z (T1, T2) {=}} ES (T1, T3) + EKX (T3, T2) (10)
Yog S-Hom Them Nyiaj Hlau Sc yog siv kom raug tsis muaj kev xav txog qhov ntsuas tus kheej ntawm cov ntsuas hluav taws xob ntawm lub ntsuas hluav taws xob ntawm lub ntsuas hluav taws xob yog EZ) {} ec (t3) (11)
Vim yog xaiv cov hlau tsis ncaj ncees lawm, ntsuas tus nqi ntawm qhov ntsuas tau ua rau tsis raug raws li qhia hauv kev sib luag (10) - (11)
Ez'-ez {= EKX (T3, T2) -ES (T3, T2) (12)
Yog tias qhov kev ua haujlwm kub ua haujlwm ntawm S-Deg thermocouple yog 900 degree thiab chav kawm huab cua, tseem yog li t} Cov qib kev sib cais, thiab tau txais qhov muaj peev xwm sib txawv li
EKX (T3, T2) -ES (T3, T2) =0. 278MV
Qhov kub ntsuas los ntawm lub ntsuas yog siab dua li qhov kub tiag tiag kub. Yog tias lub twj paj nruag tau tswj hwm ntawm 900 degree, tus nqi tiag tiag tsuas yog 875.1 degree, nrog kev ua yuam kev ntawm 24.9 degree.
Yog tias polarity tau thim rov qab nyob rau hauv qhov xwm txheej saum toj no, ntsuas ntsuas ntsuas tus nqi yuav siab dua. Thaum cov ntsuas ntsuas pom 900 degree, qhov kub thiab txias yog 933.2 Qib, nrog kev ua yuam kev ntawm 33.2 Qib.
3. Sib tov cov xov hlau uas muaj cov xov hlau zoo tib yam
Hauv cov ntawv thov siv tau, nws yog feem ntau pom tias cov xov xwm zoo li cas los txuas cov xov hlau them nyiaj vim lawv qhov kev xaim tsis txaus ntseeg tau txuas ntxiv rau tom qab cov xaim hluav taws xob tawg.
4, Kev ceev faj rau kev siv cov xov hlau
1. Xaiv cov xov tooj them nqi
Cov hlau them yuav tsum tau xaiv kom raug raws li hom ntawm thermocouple siv thiab lub sijhawm uas nws siv.
2. Kev sib txuas sib txuas
Sim ua kom ntsuas kub ntawm ob qho kev sib cuag kom ze li sai tau rau cov thermocouple davhlau ya nyob twg. Qhov ntsuas kub ntawm kev sib txuas nrog cov ntsuas ntsuas yuav tsum tau ze li sai tau. Hauv cov cheeb tsam uas muaj tus kiv cua hauv lub ntsuas txee, cov ntsiab lus hu yuav tsum tiv thaiv tus kiv cua los ntawm cov ntsiab lus ncaj qha rau cov ntsiab lus.
3. Siv qhov ntev
Vim tias lub teeb liab yog tsawg heev, yog siv dhau qhov kev cuam tshuam ntev, teeb meem hluav taws xob muaj peev xwm ua rau muaj kev cuam tshuam nrog cov ntsuas hluav taws xob tsis muaj peev xwm thiab ntsuas hluav taws xob. Thaum muaj mob hnyav, cov kev hloov pauv hluav taws xob yuav tshwm sim thaum tswj tau. Raws li kev paub, nws yog feem ntau zoo dua los tswj qhov ntev ntawm cov khoom them nyiaj hlau thermocouple ntawm 15 meters. Yog tias nws tshaj 15 metres, nws raug nquahu kom siv cov tshuab xa tawm kub kom xa cov teeb liab. Cov nqi kub hloov pauv tau cov txiaj ntsig kub sib txuas nrog qhov ntsuas kub kom ncaj qha rau kev kis tau rau kis tau, thiab muaj cov muaj zog tiv thaiv kev cuam tshuam nrog kev cuam tshuam.