Dab tsi yog Thermal Drift, thiab Yuav Ua Li Cas Thermocouples Resistant Nws?

Thermal drift yog ib qho kev hloov pauv ntawm cov khoom siv thermocouple nyob rau lub sijhawm ntawm qhov kub thiab txias, thiab nws yog ib qho ntawm cov teeb meem tseem ceeb hauv kev tswj kub khiav kub. Drift tshwm sim vim cov khoom laus, oxidation, siab - kub qaug zog, thiab metallurgical hloov nyob rau hauv cov thermocouple xov hlau. Hauv cov txheej txheem kub khiav, qhov chaw sensors ua haujlwm tsis tu ncua ntawm qhov kub siab, drift tuaj yeem ua rau kev nyeem ntawv tsis raug, tsis ruaj khov molding, thiab nce qhov tsis xws luag. Sij hawm dhau mus, lub thermocouple drifting tuaj yeem tshaj tawm qhov kub thiab txias ntau dua los yog qis dua li tus nqi tiag tiag, ua rau tus maub los ua kom tsis raug cua sov. Kev mob hnyav tuaj yeem ua rau muaj teeb meem ntau lawm uas nyuaj rau kev kuaj mob, vim tias qhov teeb meem tshwm sim maj mam. High-cov thermocouples kub khiav zoo yog tsim los txo qis thermal drift los ntawm kev siv cov khoom siv zoo tshaj plaws, cov txheej txheem tsim khoom nruj, thiab kev kho calibration. K-hom thiab J-hom thermocouples los ntawm cov chaw muag khoom muaj npe tau raug siab -kub annealing kom stabilize lawv cov microstructure thiab txo qhov ntev - drift. Mineral- insulated kev tsim kho tiv thaiv sab hauv conductors los ntawm oxidation thiab paug, ntxiv qeeb drift. Kev txhim kho kom zoo, xws li ua kom muaj kev rwb thaiv tsev txaus thiab tsis txhob overheating tshaj qhov txwv, kuj pab tswj kev ruaj ntseg. Tsis tu ncua calibration tuaj yeem ntes drift thaum ntxov thiab tso cai rau kev hloov raws sijhawm ua ntej nws cuam tshuam rau kev tsim khoom. Hauv qhov sib piv, qis- tus nqi thermocouples feem ntau siv cov ntaub ntawv tsis zoo uas txav nrawm, yuav tsum tau hloov tas li thiab ua rau qhov tsis zoo ntawm qhov tsis zoo. Rau siab- kev lag luam muaj tseeb xws li cov cuab yeej kho mob thiab cov khoom siv hluav taws xob, txawm tias qhov ntsuas me me tuaj yeem ua rau tawm - ntawm - qhov kam rau ua. Advanced thermocouple designs suav nrog cov tshuaj tiv thaiv- oxidation coatings thiab stabilized alloys kom ntev lub neej ua haujlwm ruaj khov. Kev nkag siab txog thermal drift pab cov tuam txhab xaiv cov khoom siv txhim khu kev qha ntau dua thiab tsim kom muaj lub sijhawm txij nkawm tsim nyog. Los ntawm kev xaiv drift- tiv taus cov thermocouples, cov chaw txhaj tshuaj molding tswj kom tswj tau qhov kub thiab txias, txo qhov ntsuas zaus, thiab xyuas kom ruaj khov ntev - lub sijhawm ntau lawm.