Qhia luv luv piav qhia txog lub hauv paus ntsiab lus ntawm kev kho mob infrared tus pas ntsuas kub
Infrared tus pas ntsuas kub los ntawm qhov system optical, photodetector, teeb liab amplifier thiab teeb liab ua, tso zis tso zis thiab lwm yam khoom. Optical system convergence ntawm nws daim teb ntawm saib ntawm lub hom phiaj infrared hluav taws xob hluav taws xob, qhov luaj li cas ntawm lub teb ntawm saib los ntawm tus pas ntsuas kub lub optical Cheebtsam thiab lawv qhov chaw los txiav txim. Lub zog infrared yog tsom rau lub photodetector thiab hloov mus rau hauv cov teeb liab hluav taws xob sib xws. Cov teeb liab no tau hloov mus rau qhov kub ntawm lub hom phiaj los ntawm amplifiers thiab teeb liab ua circuits thiab kho rau lub hom phiaj emissivity raws li cov algorithms siv hauv qhov ntsuas.
Nyob rau hauv qhov xwm txheej, tag nrho cov khoom uas muaj qhov kub thiab txias tshaj xoom yog tas li emitting infrared hluav taws xob hluav taws xob mus rau qhov chaw nyob ib puag ncig. Qhov loj ntawm cov khoom lub zog hluav taws xob infrared thiab nws qhov kev faib tawm los ntawm wavelength - thiab nws qhov kub thiab txias muaj kev sib raug zoo heev. Yog li ntawd, los ntawm kev ntsuas ntawm lub zog infrared radiated los ntawm cov khoom nws tus kheej, nws yuav muaj peev xwm txiav txim siab nws qhov kub thiab txias, uas yog lub hom phiaj ntawm lub hauv paus rau infrared radiation thermometry.
Blackbody yog ib qho zoo tagnrho radiator, uas 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 li cas los xij, qhov muaj nyob ntawm cov khoom tiag tiag hauv qhov xwm txheej, yuav luag txhua tus tsis yog lub cev dub, txhawm rau kom paub meej thiab tau txais kev faib tawm ntawm infrared radiation txoj cai, hauv kev tshawb fawb theoretical yuav tsum xaiv cov qauv tsim nyog, uas yog Planck muab tso rau hauv lub cev kab noj hniav hluav taws xob. quantisation vibronic qauv, uas coj mus rau Planck txoj cai ntawm lub blackbody hluav taws xob, uas yog, lub wavelength ntawm lub blackbody spectral radiance, uas yog lub pib taw tes rau txoj kev xav ntawm tag nrho cov infrared radiation, nws yog hu ua blackbody hluav taws xob txoj cai ntawm blackbody hluav taws xob. Ntxiv rau qhov wavelength ntawm hluav taws xob thiab qhov kub thiab txias ntawm cov khoom, tus nqi hluav taws xob ntawm tag nrho cov khoom tiag tiag kuj muaj feem xyuam rau cov khoom siv, kev npaj, txheej txheem thermal, thiab lub xeev saum npoo thiab ib puag ncig thiab lwm yam.
Yog li ntawd, thiaj li yuav ua kom lub blackbody hluav taws xob txoj cai muaj feem xyuam rau tag nrho cov khoom tiag tiag, nws yog ib qho tsim nyog yuav tau ua kom paub qhov sib npaug coefficient, piv txwv li, emissivity, uas muaj feem xyuam rau qhov xwm ntawm cov khoom thiab lub xeev ntawm qhov chaw. Qhov coefficient no qhia txog qhov sib thooj 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, tsuav yog lub emissivity ntawm ib yam khoom yog paub, lub infrared radiation yam ntxwv ntawm ib 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 siv cov ntsuas hluav taws xob hluav taws xob infrared los ntsuas qhov ntsuas kub ntawm lub hom phiaj ua ntej ntawm tag nrho los ntsuas lub hom phiaj hauv nws qhov band ntau ntawm cov hluav taws xob infrared, thiab tom qab ntawd los ntawm tus pas ntsuas kub los ntsuas qhov ntsuas kub ntawm lub hom phiaj yuav ntsuas. Ib leeg-xim pyrometers yog proportional rau tus nqi hluav taws xob nyob rau hauv band; ob-xim pyrometers yog proportional rau qhov piv ntawm tus nqi hluav taws xob hauv ob pawg.
