Yog vim li cas rau cov ntawv thov thermocouple tsis tsim nyog

Raws li covthermocoupleindexing naj npawb B, S, K, E thiab lwm yam thermocouple kub sib thooj rau cov millivolt (MV) tus nqi, nyob rau tib qhov kub thiab txias, generated millivolt tus nqi (MV) B Performance index tus lej yog qhov tsawg tshaj plaws, S index tus lej yog qhov tsawg tshaj plaws, K Performance index. tus lej loj dua, E index tus lej yog qhov loj tshaj, ua raws li txoj cai no los txiav txim.

Cov thermocouples uas tsim nyog los ntawm kev tshuaj xyuas thiab pov thawj tsis tsim nyog siv. Qhov tshwm sim no tsis paub thiab tsis tau ua rau tib neeg mloog. Qhov tshwm sim tsis tsim nyog hauv daim ntawv thov thermocouple uas ua rau muaj pov thawj feem ntau yog los ntawm kev cuam tshuam ntawm qhov tsis sib xws ntawm cov thermocouple xaim, qhov ua yuam kev tsis zoo ntawm cov thermocouple tiv thaiv thiab kev siv lub thermocouple tsis raug. Tus kws kho hluav taws xob kawm paub tus kws kho mob network piav qhia qhov paub tsis meej hauv kab lus no.

Qhov cuam tshuam ntawm qhov tsis sib xws ntawm cov thermocouple hlau â 'Cov khoom siv ntawmthermocoupleyog inhomogeneous. Thaum cov thermocouple raug kuaj xyuas hauv chav ntsuas, raws li qhov yuav tsum tau muaj ntawm cov kev cai, qhov tob ntawm kev nkag mus rau hauv qhov cub ntsuas qhov ntsuas kub yog 300mm. Yog li ntawd, qhov pov thawj ntawm txhua lub thermocouple tsuas tuaj yeem qhia lossis feem ntau qhia txog 300nm ntev ob peb xaim los ntawm qhov ntsuas kawg. Thermoelectric tus cwj pwm. Txawm li cas los xij, thaum qhov ntev ntawm cov thermocouple ntev, feem ntau ntawm cov xov hlau nyob hauv qhov kub thiab txias thaum siv. Yog hais tias lub thermocouple hlau yog inhomogeneous thiab nyob rau hauv ib qho chaw nrog kub gradient, ces ib feem ntawm nws yuav tsim thermoelectromotive quab yuam. Lub zog electromotive no hu ua parasitic peev xwm, thiab qhov yuam kev tshwm sim los ntawm cov kab mob cab hu ua homogeneous yuam kev.

Lub inhomogeneity ntawmthermocouplehlau tom qab siv. Hais txog qhov tsim tshiabthermocouple, txawm tias qhov kev ua tau zoo sib xws ua tau raws li qhov yuav tsum tau ua, kev rov ua dua thiab khoov yuav ua rau cov thermocouple tsim kev ua haujlwm tsis zoo, thiab nws yuav poob nws qhov sib xws. Ntxiv mus, lub thermocouple yuav poob nws homogeneity thaum nws siv rau lub sijhawm ntev hauv qhov kub thiab txias. Lub deterioration ntawm thermal electromotive quab yuam ua rau kev hloov. Thaum ib feem ntawm qhov deterioration nyob rau hauv ib qho chaw nrog ib tug kub gradient, nws kuj yuav tsim ib tug parasitic hluav taws xob muaj peev xwm superimposed rau tag nrho cov thermoelectromotive quab yuam thiab nthuav qhia qhov yuam kev.