Ob-xim infrared tus pas ntsuas kub saum npoo emission
Txhua qhov ntsuas infrared tau txais cov ntaub ntawv ntsuas kub los ntawm kev ntsuas lub zog hluav taws xob hluav taws xob nyob rau saum npoo ntawm cov khoom siv hluav taws xob. Thiab thaum lub ntsuas ntsuas infrared tau txais tib lub zog hluav taws xob infrared los ntawm lub hom phiaj, cov txiaj ntsig sib txawv yuav tau txais vim qhov sib txawv ntawm qhov sib txawv ntawm lub hom phiaj. Hauv lwm lo lus, rau tib lub zog hluav taws xob, qhov qis dua qhov emissivity, qhov kub siab dua yuav tshwm sim. Vim tias qhov emissivity saum npoo ntawm cov khoom yog txiav txim siab los ntawm cov khoom siv thiab lub xeev ntawm qhov chaw (xws li oxidation nto, txheej khoom, roughness thiab paug hauv lub xeev, thiab lwm yam). Yog li ntawd, txhawm rau ntsuas qhov ntsuas kub ntawm cov khoom siv hluav taws xob kom raug siv cov cuab yeej siv hluav taws xob infrared thermal imaging, nws yog ib qho tsim nyog yuav tsum paub txog tus nqi emissivity ntawm lub hom phiaj raug tshuaj xyuas, thiab muab cov nqi no rau hauv lub computer ua qhov tseem ceeb rau kev ntsuas kub lossis kho qhov ε. kho tus nqi ntawm infrared ntsuas ntsuas kom tag nrho cov ntsuas kub tso zis yog emissivity kho. Lwm qhov kev tawm tsam los tshem tawm qhov cuam tshuam ntawm emissivity ntawm cov txiaj ntsig kev xeem yog: thaum siv lub koob yees duab infrared thermal imaging rau kev ntsuas, qhov emission yuav tsum raug kho, thiab emissivity tus nqi ntawm qhov chaw ntawm cov khoom nyob rau hauv kev ntsuam xyuas yuav tsum tau pom thiab emissivity kho rau. tau txais kev ntsuas qhov ntsuas kub kom ntseeg tau los txhim kho kev ntseeg tau ntawm kev kuaj pom; rau cov khoom siv uas tsis tshua muaj kev ua tsis tau zoo hauv kev tshawb pom infrared, txhawm rau ua kom pom cov txiaj ntsig muaj qhov sib piv zoo, cov txheej txheem ntawm kev siv cov xim tsim nyog tuaj yeem siv los nce thiab ruaj khov tus nqi emissivity kom tau txais qhov tseeb qhov kub ntawm qhov chaw ntawm lub cuab yeej hauv qab. xeem.
Txoj kab nqes yog qhov piv ntawm cov emissivity nyob rau hauv ib qho xim wideband ntsuas kub hom rau cov emissivity nyob rau hauv ib qho xim nqaim ntsuas kub hom. Nws yog siv thaum xam qhov ntsuas kub nyob rau hauv lub dual-xim kub ntsuas hom. Txij li thaum lub emissivity ntawm lub narrowband hom tsis tuaj yeem hloov kho, nws yog xam los ntawm kev faib cov monochromatic broadband emissivity los ntawm tus nqi nqes hav.
Yog tias koj yuav tsum tau xyuam xim rau qhov ntsuas qhov nqaim, kho txoj kab nqes thiab broadband emissivity kom qhov nqaim emissivity ntau dua 1.00 (lossis tsawg dua 0.10).
Emissivity yog ib qho kev ntsuas ntawm ib yam khoom lub peev xwm los radiate infrared teeb. Tus nqi no tuaj yeem nyob ntawm {{0}} (specular) mus rau 1.0 (blackbody). Yog tias qhov emissivity tau teem rau tus nqi ntau dua li qhov tseeb emissivity, kev nyeem ntawv ntawm lub taub hau sensor yuav qis. Piv txwv li, yog tias qhov tseeb emissivity ntawm cov khoom yog 0.9 thiab qhov teeb tsa tus nqi yog 0.95, qhov ntsuas kub yuav qis dua.
Yuav ua li cas txiav txim siab txoj kab nqes
Cov kev siv tau zoo ntawm kev txiav txim siab txoj kab nqes suav nrog ntsuas qhov khoom siv qhov ntsuas kub uas siv cov kev sojntsuam (xws li RTD), thermocouple, lossis lwm yam tsim nyog. Tom qab tau txais qhov ntsuas kub tiag tiag, kho qhov teeb tsa emissivity kom txog rau thaum qhov ntsuas kub ntawm lub taub hau sensor yog sib npaug rau qhov ntsuas qhov tseeb, thiab qhov tseeb nqes hav tau txais.
Yuav ua li cas txiav txim siab emissivity
1. Siv ib qho kev sojntsuam (xws li RTD), thermocouple, lossis lwm txoj kev tsim nyog los ntsuas qhov ntsuas kub ntawm qhov khoom. Kho tus nqi emissivity kom txog thaum qhov ntsuas kub ntawm lub taub hau sensor yog tib yam li qhov ntsuas kub tiag tiag, uas yog, qhov tseeb emissivity tau txais.
2. Yog hais tias ib feem ntawm qhov saum npoo ntawm cov khoom tuaj yeem coated, qhov saum npoo ntawm cov khoom tuaj yeem dub nrog matte carbon dub. Lub sijhawm no, emissivity yog kwv yees li 0.98. Teem lub emissivity rau 0.98 thiab ntsuas qhov kub ntawm qhov blackened ib feem. Tom qab ntawd ntsuas qhov chaw nyob ib sab ntawm qhov blackened ib feem ntawm cov khoom thiab kho cov emissivity kom txog thaum lub ntsuas kub yog sib npaug rau qhov ntsuas kub. Qhov tseeb emissivity yog tam sim no tau.
3 Optimize nto ntsuas kub raws li cov lus qhia hauv qab no:
1. Siv lub ntsuas ntsuas los ntsuas qhov emissivity ntawm ib yam khoom.
2. Sim kom tsis txhob xav txog; tiv thaiv cov khoom los ntawm qhov kub-kub kub qhov chaw nyob ib puag ncig ib puag ncig.
3. Thaum cov khoom kub siab, yog tias muaj ob peb qhov sib tshooj wavelengths muaj, xaiv qhov luv wavelength.
4. Rau cov ntaub ntawv translucent, xws li iav; Thaum ntsuas kub, xyuas kom meej tias qhov kub thiab txias tom qab yog qhov sib xws thiab qis dua qhov kub ntawm cov khoom.
5. Thaum cov emissivity tsawg dua 0.9, lub taub hau sensor thiab qhov chaw ntawm lub hom phiaj yuav tsum khaws cia li ntsug li sai tau. Tsis txhob tso cai rau lub kaum sab xis ntawm lub axis ntawm lub taub hau sensor thiab cov kab ib txwm ntawm cov khoom nto siab tshaj 45 degree
