Dab tsi yog qhov ntsuas kub infrared ua haujlwm
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 kev pom ntawm txoj kev mus rau infrared hluav taws xob hluav taws xob, qhov luaj li cas ntawm qhov pom los ntawm cov pyrometer optical qhov chaw thiab lawv orientation txiav txim. Lub zog infrared tsom rau lub photodetector thiab hloov mus rau hauv cov teeb liab hluav taws xob sib xws. Lub teeb liab dhau los ntawm lub amplifier thiab teeb liab ua circuitry, thiab nyob rau hauv raws li lub cuab yeej built-in algorithms thiab mus kom ze emissivity kho, ambient kub them yog hloov mus rau hauv tus nqi kub ntawm qhov ntsuas mus kom ze.
Nyob rau hauv qhov xwm txheej, tag nrho cov khoom uas kub siab tshaj ** xoom degrees yog tas li tshaj tawm lub zog hluav taws xob infrared 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 sab nraud 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 qhov kub thiab txias ntawm nws cov tsos, uas yog raws li lub hom phiaj ntawm infrared hluav taws xob ntsuas kub ntsuas. Blackbody yog ib qho zoo tagnrho radiator, nws absorbs tag nrho cov wavelengths ntawm radiant zog, tsis muaj zog xav txog thiab kis tau tus mob, lub emissivity ntawm nws cov tsos yog 1.
Txawm li cas los xij, qhov muaj nyob ntawm cov khoom siv 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 tau thov los ntawm lub cev kab noj hniav hluav taws xob quantisation. vibronic qauv, thiab tom qab ntawd muab tau los ntawm txoj cai ntawm Planck lub blackbody hluav taws xob, uas yog, qhia nyob rau hauv wavelengths ntawm lub blackbody spectral radiance, qhov no yog qhov pib ntawm tag nrho cov infrared radiation txoj kev xav, nws yog hu ua Blackbody hluav taws xob txoj cai. Tag nrho cov khoom siv hluav taws xob hluav taws xob ntxiv rau kev cia siab 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 cov tsos ntawm qhov xwm txheej thiab ib puag ncig thiab lwm yam.
Yog li ntawd, txhawm rau ua kom cov kev cai ntawm blackbody hluav taws xob siv tau rau txhua yam khoom siv, nws yog ib qho tsim nyog yuav tsum ua kom paub qhov sib piv ntawm coefficient, piv txwv li emissivity, ntsig txog qhov xwm ntawm cov khoom thiab cov xwm txheej ntawm sab nrauv. Qhov coefficient no sawv cev rau qhov sib thooj ntawm cov hluav taws xob thermal ntawm cov khoom siv rau lub cev hluav taws xob, thiab nws cov nqi yog nyob nruab nrab ntawm xoom thiab tus nqi tsawg dua ib qho. Raws li txoj cai ntawm hluav taws xob, tsuas yog yuav tsum paub qhov emissivity ntawm cov khoom, peb paub cov infrared tawg yam ntxwv ntawm ib yam khoom. Lub ntsiab yam tseem ceeb cuam tshuam rau emissivity nyob rau hauv: hom ntawm cov khoom, zoo li roughness, lub cev thiab tshuaj layout thiab thickness ntawm cov khoom.
Thaum siv cov ntsuas hluav taws xob hluav taws xob infrared los ntsuas qhov ntsuas kub ntawm txoj cai ua ntej ntsuas txoj cai nyob rau hauv nws cov band ntau ntawm cov hluav taws xob infrared, thiab tom qab ntawd los ntawm tus pas ntsuas kub los ntsuas qhov ntsuas kub ntawm txoj cai ntsuas. Ib leeg-xim pyrometer thiab tus nqi hluav taws xob nyob rau hauv band yog proportional rau ob-xim pyrometer thiab qhov ratio ntawm tus nqi hluav taws xob nyob rau hauv ob band yog proportional.
