Kev ntsuas kub emissivity ntawm infrared tus pas ntsuas kub
Lub cev dub yog lub tshuab hluav taws xob zoo tshaj plaws uas nqus lub zog ntawm tag nrho cov wavelengths, tsis muaj kev xav lossis kev xa tawm ntawm lub zog, thiab muaj qhov emissivity ntawm 1 ntawm nws qhov chaw. Txawm li cas los xij, cov khoom tiag tiag hauv qhov yuav luag tsis yog lub cev dub. Txhawm rau kom meej meej thiab tau txais txoj cai kev faib tawm ntawm cov hluav taws xob infrared, ib qho qauv tsim nyog yuav tsum raug xaiv hauv kev tshawb fawb theoretical. Qhov no yog qhov quantized oscillator qauv ntawm lub cev kab noj hniav hluav taws xob tau npaj los ntawm Planck, yog li muab tau txoj cai ntawm Planck lub cev dub hluav taws xob, uas yog, lub cev dub spectral radiance qhia los ntawm wavelength, uas yog qhov pib ntawm tag nrho cov infrared radiation theories, yog li nws yog. hu ua txoj cai ntawm lub cev dub tawg. Tus nqi hluav taws xob ntawm tag nrho cov khoom tiag tiag nyob ntawm tsis yog nyob ntawm qhov hluav taws xob wavelength thiab qhov kub thiab txias ntawm cov khoom, tab sis kuj yog nyob ntawm hom khoom tsim los ntawm cov khoom, kev npaj, txheej txheem thermal, lub xeev thiab ib puag ncig. Yog li ntawd, txhawm rau ua kom txoj cai lij choj ntawm lub cev dub hluav taws xob siv tau rau txhua yam khoom siv, ib qho kev faib ua feem coefficient ntsig txog cov khoom siv thiab lub xeev saum npoo yuav tsum tau qhia, uas yog, emissivity. Qhov coefficient no txhais tau hais tias kaw lub thermal hluav taws xob ntawm ib qho khoom tiag tiag rau cov hluav taws xob ntawm lub cev dub, thiab nws tus nqi yog nyob nruab nrab ntawm xoom thiab tus nqi tsawg dua 1. Raws li txoj cai ntawm hluav taws xob, tsuav yog qhov emissivity ntawm cov khoom siv. paub, cov yam ntxwv infrared radiation ntawm tej yam khoom yog paub. Cov yam tseem ceeb cuam tshuam rau emissivity yog: hom khoom, nto roughness, lub cev thiab tshuaj qauv, thiab cov khoom thickness. Thaum ntsuas tib neeg lub cev kub, qhov emissivity feem ntau yog hloov kho ntawm 0.95 los ntsuas qhov ntsuas qhov tseeb tshaj plaws.
Tib neeg lub cev infrared tus pas ntsuas kub
Cov ntsuas kub infrared siv los ntsuas qhov kub ntawm tib neeg lub cev hu ua human infrared thermometers. Tab sis nws yuav tsum tau qhia meej tias tsis muaj kev kho mob tshwj xeeb lossis kev lag luam infrared tus pas ntsuas kub, vim tias cov qauv tsim khoom ntawm cov ntsuas kub infrared yog tib yam. Muaj tsuas yog high-precision, siab coefficient piv, high-performance infrared tus pas ntsuas kub thiab tsawg-precision, tsis tshua muaj coefficient piv thiab low-performance infrared thermometers. Ntev npaum li qhov emissivity ntawm tus pas ntsuas kub infrared tau teeb tsa ntawm 0.95 (qhov emissivity ntawm tib neeg daim tawv nqaij feem ntau yog qhov muaj nqis, txawm tias muaj qhov sib txawv, qhov cuam tshuam tsuas yog nyob rau hauv 0.3 degrees ), nws ua tau raws li qhov xav tau ntawm tib neeg lub cev ntsuas kub. (Piv txwv li: txhua hom tsheb tuaj yeem khiav ntawm qhov ceev ntawm 40 yards, thiab cov tsheb high-end yuav ncav cuag qhov ceev ntawm 200 yards, tab sis tsis muaj qhov sib txawv ntawm cov tsheb tshwj xeeb hauv kev khiav 40 yards thiab cov tsheb tshwj xeeb hauv kev khiav 200 yards. yards, tsuas yog qhov sib txawv ntawm cov tsheb siab thiab qis ua haujlwm .)
