Kev cuam tshuam ntawm emissivity ntawm tus pas ntsuas kub ntawm qhov ntsuas hluav taws xob ntsuas hluav taws xob
Cov khoom tiag tiag uas muaj nyob hauv qhov yuav luag tsis yog lub cev dub. 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 yog nyob ntawm hom khoom tsim los ntawm cov khoom, cov txheej txheem kev npaj, txheej txheem thermal, lub xeev saum npoo thiab ib puag ncig. 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 qhia tau hais tias qhov hluav taws xob hluav taws xob nyob ze ntawm qhov khoom tiag tiag yog li cas rau cov hluav taws xob lub cev dub, thiab nws cov 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 paub, Cov yam ntxwv ntawm cov hluav taws xob infrared ntawm txhua yam khoom tuaj yeem paub.
Lub ntsiab tseem ceeb cuam tshuam rau emissivity ntawm infrared ntsuas kub yog:
Khoom hom, nto roughness, lub cev thiab tshuaj qauv thiab cov khoom thickness, thiab lwm yam.
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 cov hluav taws xob nyob rau hauv ib tug band: dual-xim pyrometers yog proportional rau tus piv ntawm tus nqi hluav taws xob nyob rau hauv ob bands.
Tus pas ntsuas kub infrared yuav tsum raug coj mus rau qhov kev xaiv ntawm infrared system:
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 zog hluav taws xob infrared ntawm lub hom phiaj hauv nws qhov kev pom, 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 hauv tus nqi kub ntawm qhov ntsuas lub hom phiaj tom qab raug kho raws li algorithm ntawm kev kho mob sab hauv ntawm lub ntsuas thiab emissivity ntawm lub hom phiaj.
Kev xaiv cov ntsuas kub infrared tuaj yeem muab faib ua peb yam:
Cov ntsuas kev ua tau zoo, xws li qhov kub thiab txias, qhov loj me, ua haujlwm wavelength, ntsuas qhov tseeb, lub sijhawm teb, thiab lwm yam; ib puag ncig thiab kev ua haujlwm, xws li ambient kub, qhov rais, tso saib thiab tso zis, tiv thaiv accessories, thiab lwm yam .; Lwm cov kev xaiv, xws li kev yooj yim ntawm kev siv, kev tu thiab kev ntsuas kev ua tau zoo thiab tus nqi, thiab lwm yam, kuj muaj qee yam cuam tshuam rau kev xaiv ntawm tus pas ntsuas kub. Nrog rau kev txhim kho txuas ntxiv ntawm kev siv tshuab thiab thev naus laus zis, kev tsim qauv zoo tshaj plaws thiab kev nce qib tshiab ntawm cov ntsuas kub infrared muab cov neeg siv nrog ntau lub zog thiab ntau lub hom phiaj, nthuav kev xaiv.
