Dab tsi yog qhov cuam tshuam uas cuam tshuam rau qhov ua yuam kev ntawm tus pas ntsuas kub infrared?
1. Hluav taws xob tus nqi
Radiance tus nqi yog lub cev kom muaj nuj nqis uas ntsuas kev txheeb ze hluav taws xob muaj peev xwm ntawm ib qho khoom mus rau ib tus neeg. Nws tsis yog hais txog cov duab cov khoom, roughness nto, thiab concality ntawm cov khoom, tab sis kuj rau cov kev taw qhia ntawm kev xeem. Yog tias cov khoom muaj qhov chaw du, nws txoj kev coj ua tau rhiab heev. Qhov emissivity emissivity sib txawv yog qhov sib txawv, thiab ntau npaum li cas ntawm hluav taws xob hluav taws xob tau txais los ntawm tus pas ntsuas kub infrared los ntawm ib qho khoom yog sib npaug.
(1) Qhov kev teeb tsa ntawm kev tshwm sim yog raws Kirchhoff theorem: lub hemispherical monochromatic monochromatic grackptivity fackomuntivity fackomptivity fackomptivity) 1}}. Nyob rau hauv thermal equilibrium tej yam kev mob, radiated lub zog ntawm ib qho khoom yog sib npaug ntawm nws nqus dej () yog), thiab kev hloov pauv (+ ρ {4}}. Rau opaque (lossis tuab), kev hloov pauv tau pom tau li {5}}, nrog tsuas yog rauv thiab rov qab}). Raws li emissivity ntawm cov khoom nce ntxiv, kev xav txog kev txo qis, thiab kev cuam tshuam ntawm keeb kwm yav dhau los thiab rov ua dua nyob rau hauv cov qhab nia siab dua; Ntawm qhov tsis sib xws, qhov ntau dua cov keeb kwm kub lossis rawv, qhov cuam tshuam loj dua rau kev sim. Los ntawm qhov no, nws tuaj yeem pom tau tias hauv cov txheej txheem raug kuaj pom tiag tiag, kev saib xyuas kom muaj tseeb li sai tau yog li ua tau kom txo qhov kev ntsuas kub.
(2) lub kaum ntse ntse
Lub Emissivity muaj feem cuam tshuam nrog kev sim, thiab qhov kev ntsuas lub kaum ntse ntse loj, qhov ntau dua qhov kev sim ua yuam kev. Qhov no tau yooj yim dhau thaum siv infrared rau kev ntsuas kub. Feem ntau hais lus, kev xeem lub ces kaum yog qhov zoo tshaj plaws hauv 30 degree C thiab yuav tsum tsis pub tshaj 45 degree c. Yog tias nws degree c, emissivity yuav raug txo qis rau kev kho kom zoo. Yog tias ntsuas qhov ntsuas kub ntsuas yuav tsum tau tshuaj xyuas thiab txiav txim, lub kaum sab xis yuav tsum muaj qhov sib piv kom sib piv.
2. Ligh Coefficient
Qhov kev nrug coefficient (k=s: d) yog qhov sib piv ntawm qhov kev ncua ntawm tus ntsuas kub thiab lub hom phiaj ntsuas qhov ntsuas kub. Nws muaj qhov cuam tshuam tseem ceeb ntawm qhov tseeb ntawm infrared thermometers, nrog siab dua k tus nqi ua rau muaj kev daws teeb meem siab dua. Yog li ntawd, yog tias tus ntsuas kub yuav tsum tau muab ntsia dav deb ntawm lub hom phiaj vim ib puag ncig cov khoom siv thiab xav tau ntsuas qhov ntsuas kub kho qhov tsis raug. Hauv kev siv siv, ntau tus neeg saib xyuas cov kev daws teeb meem kho qhov muag. Txawm hais tias txoj kab uas hla d ntawm lub hom phiaj ntsuas, tig rau ntawm nqaj laser thiab tsom nws ntawm qhov ntsuas phiaj los kuaj. Qhov tseeb, lawv tau saib xyuas qhov yuav tsum tau ntawm S: D tus nqi rau tus pas ntsuas kub, uas yuav ua rau muaj qee qhov kev ua yuam kev hauv qhov ntsuas kub.
