Kev soj ntsuam ceev faj rau kev siv Infrared Thermometers
Lub ntsuas kub ceev infrared muaj lub tshuab kho qhov muag, photodetector, lub teeb liab amplifier, teeb liab ua, tso zis tso zis, thiab lwm yam khoom. Lub ntsuas kub kub ceev infrared ntsuas lub zog hluav taws xob hluav taws xob los ntawm cov khoom siv hluav taws xob infrared (thermal detectors thiab photodetectors) thiab hloov nws mus rau hauv cov teeb liab hluav taws xob, uas tom qab ntawd hloov mus rau hauv qhov kub thiab txias raws li cov cai tseem ceeb ntawm hluav taws xob.
Lub tshuab kho qhov muag sau cov hluav taws xob hluav taws xob infrared ntawm lub hom phiaj hauv nws qhov kev pom, thiab qhov loj ntawm qhov kev pom yog txiav txim siab los ntawm cov khoom siv kho qhov muag thiab txoj hauj lwm ntawm tus pas ntsuas kub. Lub zog infrared yog tsom rau lub photodetector thiab hloov mus rau cov khoom siv hluav taws xob sib xws. Lub teeb liab hloov mus rau qhov ntsuas kub ntawm qhov ntsuas lub hom phiaj tom qab tau nthuav dav thiab ua tiav los ntawm lub teeb liab ua haujlwm raws li lub hauv paus algorithm ntawm qhov ntsuas thiab lub hom phiaj emissivity kho. Tsis tas li ntawd, cov xwm txheej ib puag ncig ntawm lub hom phiaj thiab tus pas ntsuas kub, xws li qhov kub thiab txias, huab cua, kev ua qias tuaj, thiab cuam tshuam, yuav tsum tau txiav txim siab rau lawv cov kev cuam tshuam rau cov ntsuas kev ua tau zoo thiab cov txheej txheem kho.
Cov ntsuas kub ceev infrared yog siv los ntsuas qhov kub thiab txias ntawm cov khoom. Lub zog emissions, reflected, thiab kis tau los ntawm optical Cheebtsam ntawm tus pas ntsuas kub yog tsom mus rau lub detector. Cov khoom siv hluav taws xob ntawm tus pas ntsuas kub hloov cov ntaub ntawv no rau hauv kev nyeem ntawv ntsuas kub thiab muab tso rau ntawm tus pas ntsuas kub lub vaj huam sib luag. Qhov kub thiab txias tso tawm los ntawm lub ntsuas kub infrared feem ntau hu ua qhov ci ci ntawm lub hom phiaj, uas txawv ntawm qhov tseeb qhov kub ntawm cov khoom vim tias qhov emissivity ntawm cov khoom muaj qee yam cuam tshuam rau qhov ntsuas kub ntawm hluav taws xob. Yuav luag txhua yam khoom tiag tiag hauv qhov tsis yog blackbodies. Qib hluav taws xob ntawm tag nrho cov khoom siv tiag tiag tsis yog nyob ntawm qhov hluav taws xob wavelength thiab qhov kub thiab txias ntawm cov khoom, tab sis kuj yog nyob ntawm yam khoom xws li hom khoom, kev npaj, txheej txheem thermal, deg lub xeev, thiab tej yam kev mob uas tsim cov khoom. Yog li ntawd, txhawm rau ua kom txoj cai blackbody hluav taws xob siv tau rau txhua yam khoom siv, yuav tsum tau ua kom pom qhov sib npaug ntawm cov khoom siv thiab lub xeev nto, xws li emissivity, yuav tsum tau qhia. Qhov coefficient no sawv cev rau qib uas lub thermal hluav taws xob ntawm ib qho khoom tiag tiag ze rau lub cev hluav taws xob, thiab nws cov nqi ntawm 0 txog 1. Raws li txoj cai ntawm hluav taws xob, tsuav yog lub emissivity ntawm ib yam khoom paub, infrared radiation yam ntxwv ntawm ib yam khoom yog paub.
