Dab tsi yog lub hauv paus ntsiab lus thiab kev faib tawm ntawm tus pas ntsuas kub infrared
1. Infrared txoj cai: Ntev npaum li qhov kub ntawm txhua yam khoom siab tshaj qhov xoom xoom (-273 degree), yuav muaj hluav taws xob thermal tawm sab nraud. Qhov kub ntawm cov khoom sib txawv, lub zog hluav taws xob kuj sib txawv, thiab lub wavelength ntawm cov hluav taws xob nthwv dej kuj txawv. Txawm li cas los xij, cov hluav taws xob infrared yeej ib txwm suav nrog. Rau cov khoom qis dua 1, 000 degrees Celsius, electromagnetic nthwv dej nrog cov hluav taws xob hluav taws xob muaj zog tshaj plaws yog infrared nthwv dej. Yog li ntawd, qhov ntsuas ntawm qhov hluav taws xob infrared ntawm cov khoom nws tus kheej tuaj yeem txiav txim siab nws qhov kub thiab txias. Qhov no yog lub hom phiaj lub hauv paus thiab cov hauv paus ntsiab lus ntawm infrared ntsuas kub ntsuas kub hauv paus.
Lub cev dub yog lub tshuab hluav taws xob zoo tshaj plaws, uas nqus cov hluav taws xob hluav taws xob ntawm txhua lub wavelengths, 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. Txhawm rau kom paub meej thiab tau txais txoj cai faib tawm ntawm hluav taws xob infrared, tus qauv tsim nyog yuav tsum raug xaiv hauv kev tshawb fawb theoretical. Qhov no yog qhov quantized oscillator ntawm lub cev kab noj hniav hluav taws xob tawm tswv yim los ntawm Planck Qhov no yog qhov pib ntawm tag nrho cov infrared hluav taws xob theories, yog li nws yog hu ua txoj cai ntawm lub cev dub hluav taws xob.
Tus nqi hluav taws xob ntawm tag nrho cov khoom tiag tiag nyob ntawm tsis yog tsuas yog nyob ntawm qhov hluav taws xob wavelength thiab qhov kub ntawm cov khoom, tab sis kuj nyob ntawm cov khoom siv, kev npaj, thermal keeb kwm, lub xeev ntawm lub ntiaj teb thiab ib puag ncig ntawm cov khoom. Yog li ntawd, txhawm rau ua kom txoj cai ntawm lub cev dub hluav taws xob siv tau rau txhua yam khoom tiag tiag, nws yog ib qho tsim nyog yuav tsum ua kom pom qhov sib npaug ntawm cov khoom siv thiab lub xeev nto, uas yog, emissivity. Qhov coefficient no sawv cev rau qib sib ze ntawm cov hluav taws xob hluav taws xob ntawm cov khoom tiag tiag thiab cov hluav taws xob lub cev dub, thiab nws cov nqi yog nyob nruab nrab ntawm 0 thiab 1. Raws li txoj cai ntawm hluav taws xob, tsuav yog qhov emissivity ntawm cov khoom paub. , cov yam ntxwv hluav taws xob infrared ntawm txhua yam khoom tuaj yeem paub. Lub ntsiab tseem ceeb cuam tshuam rau emissivity ntawm cov xov paj yog: cov ntaub ntawv hom, nto roughness, lub cev thiab tshuaj qauv thiab cov khoom thickness.
2. Lub hauv paus ntsiab lus ntawm kev ua haujlwm thiab cov qauv ntawm tus pas ntsuas kub infrared: Hauv qhov xwm txheej, txhua yam khoom uas muaj qhov kub thiab txias siab tshaj qhov tsis muaj tseeb 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 hauv paus ntsiab lus ntsuas qhov ntsuas kub ntawm lub ntsuas kub infrared yog hloov lub zog hluav taws xob ntawm infrared rays 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 cov khoom (xws li molten steel) tuaj yeem txiav txim siab. 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 lub teeb liab ua Circuit Court, thiab hloov mus rau qhov kub thiab txias ntawm cov khoom ntsuas tom qab raug kho raws li lub algorithm ntawm kev kho mob sab hauv ntawm lub ntsuas thiab emissivity ntawm cov khoom.
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 hluav taws xob ntawm lub hom phiaj nyob rau hauv nws cov qhab nia, thiab tom qab ntawd qhov ntsuas kub ntawm lub hom phiaj yuav tsum tau ntsuas los ntawm tus pas ntsuas kub. Cov ntsuas kub infrared tuaj yeem muab faib ua cov ntsuas kub ib leeg thiab ob-xim ntsuas kub (radiation colorimetric thermometers) raws li txoj cai. Lub ntsuas kub ib leeg-xim yog proportional rau cov hluav taws xob hauv cov qhab; lub ntsuas kub ntawm ob xim yog proportional rau cov hluav taws xob nyob rau hauv ob pawg. Tus nqi ntawm cov hluav taws xob yog proportional.
3. Kev txhim kho thiab kev faib tawm ntawm cov ntsuas kub infrared: Infrared ntsuas kub ntsuas tshuab tau tsim los ntsuas thiab ntsuas qhov saum npoo nrog thermal hloov, txiav txim siab nws qhov kub thiab txias qhov sib txawv, 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 pib siv rau hauv tub rog. TI Corporation ntawm Tebchaws Meskas tau tsim lub ntiaj teb thawj infrared scanning system. Txij thaum ntawd los, thev naus laus zis thev naus laus zis thev naus laus zis thev naus laus zis tau siv tsis tu ncua hauv dav hlau, tso tsheb hlau luam, nkoj nkoj thiab lwm yam riam phom nyob rau sab hnub poob raws li qhov ntsuas kub rau kev tshawb pom. Lub kaw lus tau txhim kho kev muaj peev xwm tshawb nrhiav thiab ntaus lub hom phiaj. Infrared tus pas ntsuas kub tau txheeb cais raws li hauv qab no: (1) infrared qhov chaw ntsuas kub: suav nrog nqa tau thiab ruaj khov; (2) infrared scanners; (3) infrared thermal imaging koob yees duab.
