Infrared tus pas ntsuas kub nyob rau hauv daim ntawv thov kev lag luam iav
Nyob rau hauv cov txheej txheem ntawm kev lag luam iav, ntsuas kub thiab tswj yog ib qho tseem ceeb thiab tsim nyog txhais tau tias, qhov ntsuas kub infrared muaj nuj nqis vim nws txoj haujlwm yooj yim, lub sij hawm teb ceev ceev, tsis muaj kev laus, me me drift, hloov tau yooj yim, tsis muaj kab mob. cov iav tov thiab lwm yam.
Hauv kev lag luam iav yuav tsum tau pob tshab thiab opaque khoom rau kev ntsuas kub. Cov khoom opaque muaj xws li pwm, domes thiab sab phab ntsa ntawm iav melting furnaces. Iav raws li qhov ntsuas kub tsis sib cuag ntawm cov khoom ntsuas, iav yog pob tshab pom, nws cov spectrum nyob ze ntawm infrared spectral ntau yam, nws emissivity thiab wavelength thiab thickness ntawm iav muaj feem xyuam. Nws emissivity yog siab tshaj plaws thaum lub spectral ntau yog nyob nruab nrab ntawm 5 thiab 8 μm, yog li qhov kub ntawm lub iav tuaj yeem ntsuas qhov ntsuas ntawm qhov ntau. Qhov ntsuas tus nqi sib raug rau qhov kub ntawm lub khob, ntawm nws tus kheej ntawm lub thickness ntawm lub iav, thiab nyob rau hauv ntau yam no kuj zoo li tsis muaj hluav taws xob tam sim no. Txhawm rau zam qhov kev ntsuas raug cuam tshuam los ntawm huab cua puag ncig, lub pyrometer tsuas yog siv ib qho nqaim heev ntawm cov infrared spectrum. High-quality pyrometers ua haujlwm tsuas yog nyob rau hauv lub spectral ntau yam ntawm lub qhov rais ambient qhov rais, qhov uas tsis muaj qhov nqus ntawm infrared rays vim huab cua humidity los yog carbon oxides, yog li zam qhov ntsuas kub tsis raug vim qhov kev hloov ntawm huab cua humidity los yog ntsuas qhov deb. Narrow band range 5 (li 5μm) yog siv los ntsuas qhov kub ntawm qhov chaw.
Infrared thermometers feem ntau muaj spectral ntau ntawm 5.14μm los ua haujlwm nrog, vim tias cov pa hluav taws kub los ntawm cov hluav taws kub hauv cheeb tsam no tsis cuam tshuam rau kev ntsuas. Rau lwm qhov kev thov, qhov kub hauv lub khob yuav tsum tau ntsuas, vim tias cov iav txheej nyob ze rau ntawm qhov chaw muaj kev cuam tshuam los ntawm convection tam sim no. Ntawm no qhov kev ntsuas yuav tsum tau tom qab melting ntawm lub iav, ib tug pyrometer nyob rau hauv lub ze-infrared teeb ntau yog siv. Txij li thaum qhov tob ntawm kev nkag mus yog txawv ntawm qhov sib txawv wavelengths, qhov kev xaiv ntawm pyrometer nyob ntawm qhov tuab ntawm cov iav txheej. Kev ntsuas kub tsis sib cuag hauv cov iav qhov cub, tin da dej thiab annealing kilns yog nce ntxiv hloov cov tshuaj ntsuas kub ntawm thermocouple hauv iav furnaces.
Thermocouples muaj hnub nyoog thiab drift sai piv rau pyrometers ntawm qhov kub thiab txias ua hauj lwm thiab ambient tej yam kev mob, thiab thiaj li yuav tiv thaiv cov thermocouples, nyob rau hauv tej rooj plaub platinum hlau yog yuav tsum tau rau cov tiv thaiv casing, uas yuav ua tau ntau npaum li cas kim. Tshwj xeeb tshaj yog rau thaj chaw no, tsis muaj qhov cua txias yuav tsum ua haujlwm ntawm qhov kub thiab txias txog li 250 degree. Kev txhim kho thiab khiav cov nqi tuaj yeem txo qis los ntawm kev siv fiber ntau optic pyrometer, uas tuaj yeem tiv thaiv los ntawm cov hlau tsis muaj steel hlau, thiab muaj nyob rau hauv qhov ntev txog li 30 meters. . Yuav tsum tau mounting accessories xws li mounting ces kaum, cua huv, peep hlab (muaj txog li 1200 degree).
