Thaum muaj ob qhov sib txawv conductors lossis semiconductor A thiab B los ua A voj, nws ob qhov kawg txuas nrog, tsuav yog qhov kub ntawm ob lub nodes sib txawv, qhov kawg kub ntawm T, hu ua kawg lossis kub kawg ua haujlwm, ntawm lwm yam. qhov kawg kub T0, lub npe hu ua qhov kawg dawb (tseem hu ua qhov siv sab) lossis qhov kawg txias, Circuit Court yuav tsim lub zog hluav taws xob, kev taw qhia thiab qhov loj ntawm lub zog hluav taws xob muaj feem xyuam rau cov khoom siv hluav taws xob thiab qhov kub ntawm ob qhov kev sib cuag. .Qhov tshwm sim no yog hu ua cov nyhuv thermoelectric, ob hom conductor circuit hu ua "thermocouple", tsim los ntawm ob lub conductors hu ua "kub" electrode, electromotive quab yuam hu ua "thermoelectric emfs.
Thermoelectric emfs yog tsim los ntawm ob feem ntawm electromotive quab yuam, ib feem ob tus neeg xyuas pib hu rau electromotive quab yuam, lwm qhov yog ib tus neeg xyuas pib ntawm qhov kub ntawm qhov sib txawv electromotive quab yuam.
Qhov loj ntawm cov thermocouple voj thermoelectric emfs, tsuas yog nrog cov khoom sib xyaw ntawm cov khoom siv thermocouple muaj feem xyuam rau qhov kub ntawm ob qhov kev sib cuag, thiab tsis muaj dab tsi cuam tshuam nrog cov duab loj ntawm lub thermocouple.Tom qab lub thermocouple tsau ob cov khoom siv hluav taws xob, tiv tauj kub t thiab thermoelectric emfs yog ob t0.Cov haujlwm tsis zoo.
Qhov kev sib npaug no tau siv dav hauv qhov ntsuas kub tiag tiag.Vim tias qhov txias kawg t0 tas li, ua los ntawm cov thermocouple thermoelectric emfs nkaus xwb (kev ntsuas) ntawm qhov kub kawg ntawm qhov kub ntawm qhov sib txawv, cov thermoelectric emfs sib haum rau qee qhov kub.Tsuav yog peb siv txoj kev ntsuas cov thermoelectric emfs tuaj yeem ua tiav lub hom phiaj ntawm kev ntsuas kub.
Thermocouple ntsuas ntsuas yog qhov tseem ceeb ntawm ob lub ntsiab lus ntawm lub zog hluav taws xob ntawm ob qho kawg - Thermoelectric EMF , qhov no yog qhov hu ua Seebeck effect (Seebeck effect).Ob qhov sib txawv ntawm homogeneous conductor electrode raws li cov cua sov, qhov kub thiab txias yog siab dua rau kev ua haujlwm ntawm qhov kawg ntawm qhov kawg, ib qho kawg ntawm qhov kub tsis tshua muaj qhov kawg ntawm qhov dawb, feem ntau yog dawb kawg nyob rau hauv qhov kub thiab txias.Raws li cov thermoelectric emf raws li kev ua haujlwm ntawm qhov kub thiab txias, lub thermocouple indexing rooj;Indexing table yog dawb kawg kub ntawm 0 ℃, nyob rau hauv cov xwm txheej ntawm txawv thermocouples nrog txawv indexing rooj.
Kev nkag mus rau hauv lub voj voog thermocouple thaum cov khoom siv hlau thib peb, ob qhov kev sib cuag ntawm tib qhov kub ntev li ntev tau raws li cov khoom siv, ua los ntawm cov thermocouple thermoelectric yog teem kom nyob twj ywm tib yam, uas tsis cuam tshuam los ntawm qhov thib peb hlau nkag rau hauv lub voj.Yog li ntawd, thaum ntsuas qhov ntsuas kub ntawm thermocouple, tuaj yeem txuas nrog lub ntsuas ntsuas, ntsuas tom qab ntsuas qhov ntsuas kub, tuaj yeem paub qhov ntsuas kub ntawm qhov ntsuas nruab nrab.Thermocouple ntsuas qhov ntsuas kub mus rau qhov txias kawg ( ntsuas qhov kawg rau qhov kub kawg, los ntawm qhov kawg ntawm cov hlau lead txuas nrog lub ntsuas hluav taws xob yog hu ua qhov sib txuas txias) qhov kub thiab txias yog khaws cia tas li, qhov loj ntawm qhov ntsuas kub thiab ntsuas kub hauv qee qhov kev sib raug zoo.Thaum ntsuas, qhov txias kawg qhov kub hloov pauv (ib puag ncig), yuav cuam tshuam rau qhov tseeb ntawm kev ntsuas.Kev nqis tes ua ntawm qhov kev them nyiaj txias kawg vim qhov cuam tshuam ntawm qhov txias kawg qhov kub hloov pauv yog hu ua thermocouple txias junction them nyiaj yog qhov qub.Txuas nrog lub ntsuas ntsuas nrog tus neeg xyuas pib them nyiaj tshwj xeeb.
Thermocouple txias junction them nyiaj txoj kev suav nrog:
Los ntawm millivolt mus rau qhov kub thiab txias: ntsuas qhov txias kawg kub thiab hloov dua siab tshiab rau qhov sib piv millivolt qhov tseem ceeb, millivolt qhov tseem ceeb nrog thermocouple, kev hloov pauv kub;
Los ntawm qhov kub thiab txias mus rau millivolt: ntsuas qhov ntsuas kub thiab txias kawg kub thiab hloov pauv rau millivolt qhov tseem ceeb, raws li, tom qab rho tawm cov millivolt qhov tseem ceeb, kub ceev.
Post lub sij hawm: Dec-04-2020