Yuav ua li cas Infrared Thermometers txiav txim siab nqes hav thiab emissivity
yuav ua li cas txiav txim siab nqes hav
Cov kev siv tau zoo rau kev txiav txim siab txoj kab nqes suav nrog ntsuas qhov ntsuas kub ntawm cov khoom nrog kev sojntsuam (xws li RTD), thermocouple, lossis lwm yam tsim nyog. Tom qab tau txais qhov ntsuas kub tiag tiag, kho qhov chaw ntawm qhov emissivity kom txog thaum qhov ntsuas kub ntawm lub taub hau sensor sib npaug rau qhov ntsuas qhov ntsuas kub, uas yog, qhov tseeb nqes hav yog tau.
Yuav ua li cas txiav txim siab emissivity.
1. Siv ib qho kev sojntsuam (xws li RTD), thermocouple, lossis lwm yam kev tsim nyog los ntsuas qhov ntsuas kub ntawm qhov khoom. Kho tus nqi ntawm emissivity kom txog thaum lub ntsuas kub ntawm lub taub hau sensor yog tib yam li qhov tseeb qhov kub thiab txias, 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 hais txog 0.98. Teem lub emissivity rau 0.98, thiab ntsuas qhov kub ntawm qhov blackened ib feem. Thaum kawg, ntsuas qhov chaw nyob ib sab ntawm qhov blackened ib feem ntawm cov khoom thiab kho cov emissivity kom txog thaum lub ntsuas kub ntsuas qhov sib npaug ntawm qhov ntsuas kub. Qhov tseeb emissivity yog ces tau.
3 Txhim kho qhov ntsuas kub ntawm qhov chaw raws li cov 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 thiab txias qhov chaw nyob ib puag ncig.
3. Thaum qhov kub ntawm qhov khoom yog siab, yog tias muaj ob peb qhov sib tshooj wavelengths, 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 cia lub kaum sab xis ntawm lub taub hau sensor axis thiab qhov chaw ib txwm ntawm cov khoom siab tshaj 45 degree
