Txoj hauv kev ua haujlwm, kev faib tawm thiab kev siv niaj hnub ntawm infrared tus pas ntsuas kub
Lub hauv paus ntsiab lus ntsuas kub ntawm lub ntsuas kub infrared yog hloov lub zog hluav taws xob ntawm cov kab hluav taws xob infrared tawm los ntawm cov khoom (xws li cov hlau molten) rau hauv cov teeb liab hluav taws xob. Qhov loj ntawm lub zog hluav taws xob infrared sib raug rau qhov kub ntawm cov khoom (xws li molten steel) nws tus kheej. , qhov kub ntawm ib yam khoom (xws li molten steel) tuaj yeem txiav txim siab. Kev ntsuas kub infrared thev naus laus zis tau tsim los ntsuas thiab ntsuas qhov ntsuas kub ntawm qhov chaw nrog thermal hloov, txiav txim siab nws qhov kub thiab txias faib cov duab, thiab sai sai ntes qhov sib txawv ntawm qhov kub thiab txias. Qhov no yog lub infrared thermal imager. Infrared thermal imaging koob yees duab tau xub siv nyob rau hauv cov tub rog. Hauv 19 xyoo, TI Corporation ntawm Tebchaws Meskas tau tsim lub ntiaj teb thawj zaug infrared scanning reconnaissance system. Tom qab ntawd, thev naus laus zis thev naus laus zis thev naus laus zis thev naus laus zis tau ua tiav hauv dav hlau, tso tsheb hlau luam, nkoj nkoj thiab lwm yam riam phom hauv Western lub teb chaws, raws li lub thermal pom qhov system rau kev soj ntsuam cov hom phiaj, nws tau txhim kho lub peev xwm tshawb nrhiav thiab ntaus lub hom phiaj. Lub koob yees duab infrared thermal imaging uas tsim los ntawm Swedish AGA lub tuam txhab yog nyob rau hauv ib txoj hauj lwm nyob rau hauv pej xeem technology. Txawm li cas los xij, yuav ua li cas thiaj li ntsuas qhov ntsuas kub infrared siv dav siv tseem yog qhov teeb meem. Nws yog ib lub ntsiab lus thov tsim nyog ntawm kev tshawb fawb.
Tus pas ntsuas kub infrared yog tsim los ntawm optical system, photoelectric detector, teeb liab amplifier, teeb liab ua, tso zis tso zis thiab lwm yam. Lub tshuab kho qhov muag sib sau ua ke lub hom phiaj infrared hluav taws xob hluav taws xob hauv nws qhov chaw saib, thiab qhov loj ntawm qhov kev pom yog txiav txim los ntawm qhov chaw kho qhov muag ntawm tus pas ntsuas kub thiab nws txoj hauj lwm. Lub zog infrared yog 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 Circuit Court, thiab hloov mus rau hauv tus nqi kub ntawm qhov ntsuas lub hom phiaj tom qab raug kho raws li algorithm ntawm kev kho sab hauv ntawm lub ntsuas thiab emissivity ntawm lub hom phiaj.
Nyob rau hauv qhov xwm txheej, tag nrho cov khoom uas muaj qhov kub siab tshaj li xoom yog tas li emitting infrared hluav taws xob hluav taws xob mus rau qhov chaw nyob ib puag ncig. Qhov loj ntawm lub zog hluav taws xob infrared ntawm ib yam khoom thiab nws qhov kev faib tawm raws li lub wavelength - muaj kev sib raug zoo nrog nws qhov kub thiab txias. Yog li, los ntawm kev ntsuas lub zog infrared radiated los ntawm cov khoom nws tus kheej, nws qhov kub thiab txias tuaj yeem txiav txim siab, uas yog lub hauv paus rau kev ntsuas kub ntawm infrared radiation.
Lub cev dub yog lub tshuab hluav taws xob zoo tshaj plaws, uas nqus tau tag nrho cov wavelengths ntawm lub zog hluav taws xob, tsis muaj kev xav thiab kev xa tawm ntawm lub zog, thiab muaj 1 emissivity ntawm nws qhov chaw. Txawm li cas los xij, cov khoom siv hauv qhov xwm txheej yuav luag tsis yog lub cev dub. Qinghe tau txais txoj cai faib hluav taws xob hluav taws xob, thiab hauv kev tshawb fawb theoretical, yuav tsum xaiv cov qauv tsim nyog, uas yog tus qauv oscillator quantized oscillator ntawm lub cev kab noj hniav hluav taws xob tau npaj los ntawm Planck, thiab yog li muab tau txoj cai ntawm Planck lub cev hluav taws xob dub, uas yog, lub cev dub qhia los ntawm wavelength Spectral radiance, uas yog qhov pib ntawm tag nrho cov infrared radiation theories, hu ua txoj cai ntawm lub cev dub hluav taws xob. Cov hluav taws xob ntawm tag nrho cov khoom tiag tiag tsis yog nyob ntawm qhov hluav taws xob wavelength thiab qhov kub ntawm cov khoom, tab sis kuj nyob ntawm hom khoom, kev npaj, thiab cov txheej txheem thermal ntawm cov khoom. Nws muaj feem xyuam rau yam xws li lub xeev nto thiab ib puag ncig tej yam kev mob. 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 ntawm 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 siv lub ntsuas hluav taws xob hluav taws xob infrared los ntsuas qhov ntsuas kub ntawm lub hom phiaj, nws yog thawj zaug uas yuav tsum ntsuas qhov hluav taws xob infrared ntawm lub hom phiaj nyob rau hauv nws cov band range, thiab tom qab ntawd qhov ntsuas kub ntawm lub hom phiaj ntsuas yog xam los ntawm tus pas ntsuas kub. Monochromatic pyrometers yog proportional rau tus nqi ntawm hluav taws xob nyob rau hauv ib tug band; dual-xim pyrometers yog proportional rau qhov piv ntawm tus nqi hluav taws xob hauv ob pawg.
Kev ntsuas kub infrared txais ib txoj kev tsom xam point-by-point, uas yog, thermal tawg ntawm ib cheeb tsam hauv cheeb tsam ntawm cov khoom yog tsom rau ntawm ib qho kev ntsuas, thiab cov hluav taws xob hluav taws xob tau hloov mus rau hauv qhov kub thiab txias los ntawm emissivity ntawm cov khoom paub. . Vim yog cov khoom sib txawv, kev ntsuas ntau thiab siv sijhawm, cov qauv tsim thiab sab hauv ntawm cov ntsuas kub infrared sib txawv, tab sis cov qauv yooj yim feem ntau zoo sib xws, feem ntau suav nrog optical system, photodetector, teeb liab amplifier thiab teeb liab ua, tso zis tawm thiab lwm yam. ntu. Infrared hluav taws xob emitted los ntawm lub radiator. Nkag mus rau qhov kho qhov muag, cov hluav taws xob infrared yog hloov pauv mus rau hauv cov hluav taws xob hloov pauv los ntawm lub modulator, thiab hloov mus rau hauv cov teeb liab hluav taws xob sib xws los ntawm lub tshuab ntes. Lub teeb liab dhau los ntawm lub amplifier thiab teeb liab ua Circuit Court, thiab hloov mus rau qhov kub ntawm qhov ntsuas lub hom phiaj tom qab raug kho raws li algorithm hauv qhov ntsuas thiab lub hom phiaj emissivity.
