Deg emitting ob-xim infrared tus pas ntsuas kub
Txhua qhov ntsuas infrared ntsuas yog ntsuas lub zog hluav taws xob infrared nyob rau saum npoo ntawm cov khoom siv hluav taws xob kom tau txais cov ntaub ntawv ntsuas kub ntawm cov khoom siv. Thiab nyob rau hauv cov ntaub ntawv ntawm infrared diagnostic instruments tau txais tib lub infrared hluav taws xob hluav taws xob lub zog los ntawm lub hom phiaj, vim qhov sib txawv emissivity ntawm qhov chaw ntawm lub hom phiaj, yuav tau txais txawv nrhiav tau. Qhov ntawd yog hais tias, rau tib lub zog radiant, qhov qis dua qhov emissivity, qhov siab dua qhov kub yuav tshwm sim. Lub emissivity ntawm qhov chaw ntawm cov khoom yog tsuas yog txiav txim los ntawm qhov xwm ntawm cov khoom thiab lub xeev ntawm nto (xws li nto oxidation, txheej khoom, roughness thiab av, thiab lwm yam). Yog li ntawd, txhawm rau siv cov cuab yeej ntsuas hluav taws xob infrared kom raug ntsuas qhov ntsuas kub ntawm cov khoom siv hluav taws xob, nws yog ib qho tsim nyog yuav tsum paub txog tus nqi ntawm emissivity ntawm lub hom phiaj tshuaj xyuas, thiab nkag mus rau tus nqi no rau hauv lub computer raws li qhov tseem ceeb rau kev ntsuas qhov kub thiab txias. kho tus nqi ε- kho tus nqi ntawm qhov ntsuas infrared txhawm rau kho qhov emissivity ntawm qhov ntsuas qhov ntsuas kub tso zis. Tshem tawm qhov cuam tshuam ntawm emissivity rau qhov kev tshawb pom tau ntawm lwm qhov kev tiv thaiv yog: thaum siv infrared thermography rau kev ntsuas, cov emission yuav tsum raug kho kom paub qhov emissivity nqi ntawm qhov chaw ntawm cov khoom siv tau ntsuas emissivity kho, thiaj li yuav tau txais. ib qho kev ntsuas qhov ntsuas kub txhim khu kev qha los txhim kho kev ntseeg tau ntawm kev kuaj pom; rau kev tshawb nrhiav infrared ntawm cov khoom siv tsis tu ncua, txhawm rau ua kom pom cov txiaj ntsig muaj qhov sib piv zoo, koj tuaj yeem siv daim ntawv thov txheej txheej tsim nyog rau xim kom nce thiab ruaj khov tus nqi emissivity, thiaj li tau txais qhov tseeb qhov kub ntawm qhov chaw. ntawm cov khoom siv ntsuas.
Txoj kab nqes yog qhov piv ntawm cov emissivity nyob rau hauv monochrome broadband hom rau emissivity nyob rau hauv lub monochrome nqaim band hom, thiab yog siv nyob rau hauv ob-xim kub ntsuas hom los xam qhov ntsuas kub. Txij li thaum lub emissivity nyob rau hauv lub narrowband hom tsis tuaj yeem hloov kho, nws pom tau los ntawm kev faib cov monochrome broadband emissivity los ntawm tus nqi nqes hav.
Yog tias koj yuav tsum nco ntsoov qhov ntsuas qhov nqaim, ua kom qhov nqaim emissivity ntau dua 1.
Emissivity yog ib qho kev ntsuas ntawm ib yam khoom lub peev xwm los radiate lub teeb infrared. Tus nqi no tuaj yeem nyob ntawm {{0}} (rau daim iav) mus rau 1.0 (rau lub cev dub), thiab yog tias qhov emissivity raug teeb tsa rau tus nqi ntau dua qhov tseeb emissivity, lub taub hau sensor yuav nyeem qis. Piv txwv li, yog tias qhov tseeb emissivity ntawm ib yam khoom yog 0.9 thiab cov nqi teev yog 0.95, qhov ntsuas kub yuav qis.
Yuav Ua Li Cas Txiav Txim Siab
Cov kev siv tau zoo ntawm kev txiav txim siab txoj kab nqes suav nrog ntsuas qhov kub ntawm cov khoom siv kev sojntsuam (xws li RTD), thermocouple, lossis lwm txoj kev tsim nyog. Thaum tau txais qhov ntsuas kub tiag tiag, qhov teeb tsa emissivity tau hloov kho kom txog rau thaum qhov ntsuas kub ntawm lub taub hau sensor yog sib npaug rau qhov ntsuas qhov tseeb, ces qhov tseeb nqes hav tau txais.
Yuav ua li cas los txiav txim qhov emissivity
1. Txiav txim siab qhov kub thiab txias ntawm cov khoom siv kev sojntsuam (xws li RTD), thermocouple, lossis lwm txoj kev tsim nyog. Kho tus nqi ntawm emissivity kom txog rau thaum qhov ntsuas kub ntawm qhov ntsuas lub taub hau yog tib yam li qhov ntsuas kub tiag tiag, piv txwv li, qhov tseeb emissivity tau txais.
2. Yog hais tias ib feem ntawm qhov saum npoo ntawm cov khoom tuaj yeem coated, qhov saum npoo ntawm cov khoom tuaj yeem dub nrog cov pa roj carbon tsis zoo, thaum lub sij hawm emissivity yog li ntawm 0.98. Teem lub emissivity rau 0.98 thiab ntsuas qhov kub ntawm qhov blackened ib feem. * Tom qab ntawd, ntsuas qhov chaw nyob ib sab ntawm qhov blackened feem ntawm cov khoom thiab kho cov emissivity kom txog rau thaum qhov ntsuas kub yog sib npaug rau qhov ntsuas kub. Qhov tseeb emissivity yog ces tau.
3. Txhim kho qhov ntsuas kub ntawm qhov chaw raws li cov lus qhia hauv qab no:
1, Siv lub ntsuas ntsuas los ntsuas qhov emissivity ntawm cov khoom.
2. Tsis txhob xav txog ntau li ntau tau; tiv thaiv cov khoom los ntawm qhov kub thiab txias qhov chaw nyob ib puag ncig.
3, Thaum cov khoom muaj qhov kub thiab txias, yog tias muaj ntau qhov sib tshooj wavelengths, xaiv qhov luv wavelength.
4, rau cov ntaub ntawv translucent, xws li iav; Kev ntsuas kub yuav tsum xyuas kom meej tias qhov ntsuas kub hauv qab yog qhov sib xws thiab qis dua qhov kub ntawm cov khoom.
5, thaum lub emissivity tsawg dua 0.9, lub taub hau sensing thiab qhov chaw ntawm lub hom phiaj yuav tsum tau khaws cia li perpendicular li sai tau. Tsis txhob cia lub kaum sab xis ntawm lub axis ntawm lub taub hau sensor thiab cov khoom nto ib txwm muaj ntau dua 45 degree!
