Lub hauv paus ntsiab lus ntawm infrared detection (infrared radiation detection)
Qhov tseem ceeb ntawm infrared detection (infrared radiation detection) nyob rau hauv lub nondestructive xeem technology txoj kev yog siv cov yam ntxwv ntawm infrared hluav taws xob ntawm cov khoom rau tsis sib cuag infrared kub txheej txheem.
Infrared yog ib hom electromagnetic nthwv dej, nrog lub xov tooj cua tsis muaj zog thiab pom lub teeb ntawm tib yam, lub wavelength ntawm 0.76 ~ 100μm, raws li qhov ntau ntawm wavelengths tau muab faib ua ze-infrared, nruab nrab-infrared, far-infrared, far-infrared, heev deb-infrared plaub pawg, uas yog nyob rau hauv lub nruam spectrum ntawm electromagnetic nthwv dej nyob rau hauv lub cheeb tsam ntawm lub xov tooj cua nthwv dej thiab pom lub teeb ntawm qhov chaw. Cov hluav taws xob hluav taws xob hluav taws xob yog lub ntuj tsim muaj ntau yam ntawm cov hluav taws xob hluav taws xob ntau, nws yog nyob ntawm txhua yam khoom nyob rau hauv ib puag ncig ib puag ncig yuav tsim lawv tus kheej molecules thiab atoms tsis xwm yeem txav, thiab tas li radiating thermal infrared zog, molecules thiab atoms ntawm lub zog ntau dua, qhov loj dua lub zog ntawm hluav taws xob, thiab vice versa, lub zog ntawm hluav taws xob me me.
Tag nrho cov kub nyob rau hauv lub xoom degree (-273.15K degree) saum toj no cov khoom, yuav yog vim lawv tus kheej molecular zog thiab tas li radiate infrared radiation mus rau ib ncig ntawm lub qhov chaw, qhov luaj li cas ntawm cov khoom lub infrared hluav taws xob hluav taws xob thiab nws tis ntawm wavelengths thiab nws qhov kub thiab txias muaj kev sib raug zoo heev. Los ntawm lub ntsuas hluav taws xob infrared yuav yog lub zog ntawm cov khoom hluav taws xob hluav taws xob hloov pauv mus rau cov teeb liab hluav taws xob (ntawm cov khoom nws tus kheej infrared hluav taws xob ntsuas hluav taws xob ntsuas), nws tuaj yeem txiav txim siab qhov kub thiab txias, lossis los ntawm cov khoom siv hluav taws xob tso tawm tuaj yeem ua tiav ib qho. -rau-ib tsab xov xwm los simulate scanning ntawm cov khoom saum npoo kub spatial faib, ua tiav los ntawm cov tshuab hluav taws xob, xa mus rau lub vijtsam zaub, thiab cov khoom siv hluav taws xob faib hluav taws xob ntawm daim duab qhia thermal. Cov teeb liab tso zis tuaj yeem simulate qhov sib faib ntawm qhov kub thiab txias ntawm qhov chaw scanned raws nraim ib mus rau ib qho. Siv cov qauv no, koj tuaj yeem paub lub hom phiaj rau kev ntsuas qhov ntev ntawm lub xeev cov duab thaij duab thiab ntsuas qhov ntsuas kub thiab ntsuas thiab kev txiav txim siab, uas yog, lub hauv paus ntsiab lus ntawm kev ntsuas hluav taws xob infrared.
Planck's blackbody radiation law: blackbody yog lub cev hluav taws xob zoo tshaj plaws, nws absorbs tag nrho cov wavelengths ntawm radiant zog, tsis muaj zog xav txog thiab kis tau tus mob, lub emissivity ntawm nws nto yog 1. Txawm hais tias tsis muaj tiag tiag blackbody nyob rau hauv cov xwm, tab sis nyob rau hauv thiaj li yuav qhia meej. thiab tau txais kev cai lij choj ntawm kev faib cov hluav taws xob infrared nyob rau hauv txoj kev kawm theoretical yuav tsum tau xaiv raws li tus qauv tsim nyog, uas yog Planck muab tso rau pem hauv ntej los ntawm lub cev ntawm cov hluav taws xob ntawm cov kab noj hniav ntawm cov quantization ntawm cov qauv vibronic, yog li deriving Planck lub blackbody. Yog li muab tau Planck txoj cai ntawm blackbody hluav taws xob, uas yog, qhia nyob rau hauv wavelengths ntawm lub blackbody spectral radiance, uas yog qhov pib ntawm tag nrho cov infrared radiation txoj kev xav, nws yog hu ua txoj cai ntawm blackbody hluav taws xob.
Yuav luag tag nrho cov khoom tiag tiag uas muaj nyob hauv qhov tsis yog blackbodies. Tag nrho cov hluav taws xob ntawm cov khoom tiag tiag ntxiv rau lub wavelength ntawm cov hluav taws xob hluav taws xob thiab qhov kub ntawm cov khoom, tab sis kuj nrog cov khoom siv ntawm cov khoom siv, kev npaj, txheej txheem thermal, nrog rau lub xeev saum npoo thiab ib puag ncig thiab lwm yam. yam. Yog li ntawd, nyob rau hauv kev txiav txim rau Blackbody Luj Lij Laij Teb txoj cai Qhov coefficient no qhia txog qhov sib ze ntawm cov hluav taws xob thermal ntawm ib yam khoom tiag tiag rau cov hluav taws xob lub cev, thiab muaj tus nqi ntawm xoom thiab tus nqi tsawg dua ib qho. Raws li txoj cai lij choj ntawm hluav taws xob, sai li sai tau thaum lub emissivity ntawm ib yam khoom yog paub, lub infrared radiation zog ntawm tej yam khoom yog paub.
