Daim ntawv thov ntawm Infrared Thermometer hauv Steel Rolling Production
Kev sib xyaw ntawm cov ntsuas kub infrared
Infrared thermometers, tseem hu ua infrared radiation thermometers, txiav txim siab qhov kub ntawm cov khoom ntsuas los ntawm kev ntsuas hluav taws xob hluav taws xob ntawm cov khoom, uas yog los ntawm lub zog muaj nyob hauv cov khoom. Rau cov ntawv thov kev lag luam peb muaj kev txhawj xeeb nrog cov hluav taws xob infrared txuas los ntawm qhov luv luv ntawm lub teeb pom kev mus rau lub teeb infrared mus txog 20 μm. Yog li ntawd, tus pas ntsuas kub infrared (qhov ntsuas hluav taws xob hluav taws xob) yog ib qho khoom siv uas ntsuas lub zog hluav taws xob thiab siv hluav taws xob tawm hluav taws xob los qhia nws qhov kub thiab txias.
Cov ntsuas kub infrared feem ntau tuaj yeem muab faib ua plaub ntu: uas yog, qhov system kho qhov muag, lub ntsuas hluav taws xob infrared, teeb liab ua haujlwm, thiab cov khoom tso tawm.
1 Optical system
Lub tshuab kho qhov muag yog ib feem tseem ceeb ntawm cov ntsuas kub infrared. Nws lub luag haujlwm tseem ceeb yog: kev sib koom ua ke ntawm lub zog hluav taws xob, lub hom phiaj ntawm lub hom phiaj los ntsuas, kev txiav txim siab ntawm qhov pom ntawm tus pas ntsuas kub, thiab qee qhov kev sib khi ntawm cov ntsuas kub sab hauv.
2 Infrared detectors
Lub ntsuas hluav taws xob infrared yog qhov tseem ceeb ntawm lub ntsuas kub infrared. Lub ntsuas hluav taws xob infrared tau txais lub zog hluav taws xob ntawm cov khoom ntsuas los ntawm lub hom phiaj lens, hloov lub zog hluav taws xob mus rau hauv lub teeb liab hluav taws xob, thiab thaum kawg tau txais qhov kub thiab txias ntawm cov khoom ntsuas los ntawm kev ua tom ntej.
3 Kev ua haujlwm teeb liab
Lub ntsuas hluav taws xob infrared hloov cov hluav taws xob infrared rau hauv lub teeb liab hluav taws xob, uas xa mus rau lub teeb liab ua haujlwm, thiab nkag mus rau microprocessor los ntawm preamplifier thiab A / D conversion. Nyob rau tib lub sijhawm, qhov ntsuas kub ntawm qhov ntsuas kub kuj tseem nkag mus rau microprocessor, uas yog linearized los ntawm microprocessor. Tom qab ua tiav, kev them nyiaj ib puag ncig thiab kho emissivity, kho cov teeb liab tso tawm tau txais.
4 tso zis tso zis
Hauv kev siv tswv yim, qhov kub thiab txias teeb liab muab los ntawm processor yog siv ob txoj hauv kev: ib qho yog los tso saib nws los ntawm cov zaub; lwm qhov yog xa cov teeb liab kub mus rau kev tswj hwm kev lag luam kom paub txog kev tswj cov txheej txheem ntau lawm, thiab tseem muaj ob txoj hauv kev siv tib lub sijhawm.
Cov ntsuas kub sib txawv tuaj yeem tso saib tus nqi ntawm lub sijhawm, qhov siab tshaj plaws, tus nqi qis tshaj, tus nqi nruab nrab, qhov sib txawv, thiab tseem tuaj yeem tso saib emissivity teeb tsa tus nqi, lub tswb teeb tsa tus nqi, thiab lwm yam. Tom qab software ua haujlwm, nws tuaj yeem tso saib qhov kub thiab txias nkhaus, heatmap thiab lwm yam. Cov ntsuas kub uas siv ntau tshaj plaws yog 0-20mA lossis 4-20mA cov zis tam sim no. Yog tias xav tau lub teeb liab voltage, lub teeb liab tam sim no kuj tuaj yeem hloov pauv thiab ntsuas.
Kev xaiv ntawm Infrared Thermometer
Hauv cov ntawv thov kev lag luam, feem ntau muaj qee qhov kev tshaj tawm ntawm cov pyrometer thiab ntsuas lub hom phiaj, uas tuaj yeem ua rau tsis muaj zog lossis txawm tias tag nrho cov hluav taws xob ntawm lub zog ntawm lub hom phiaj ntsuas, thiab cov pyrometer tsuas tuaj yeem ntsuas lub hom phiaj nws "pom". Peb feem ntau siv cov ntsuas kub ntsuas kub feem ntau suav nrog cov hauv qab no:
① Broadband tus pas ntsuas kub, los yog broadband tus pas ntsuas kub, nws cov lus teb spectral yog txwv los ntawm qhov kho qhov muag, feem ntau yog siv los ntsuas qhov kub thiab txias, nruab nrog lub ntsuas ntsuas nrog cov lus teb dav dav.
② Xaiv lub ntsuas ntsuas ntsuas ntsuas, nws cov lus teb wavelength yog txwv los ntawm lub lim, thiab cov lus teb ntawm lub ntsuas ntsuas tuaj yeem xaiv raws li qhov xav tau ntawm daim ntawv thov.
③ Lub ntsuas cua luv luv tuaj yeem txo qhov ntsuas qhov yuam kev thaum lub emissivity hloov. Cov nthwv dej luv luv hais ntawm no yog cov txheeb ze, thiab nws tuaj yeem ua tau ib lub wavelength ntawm 0.6 μm ntawm qhov kub ntawm 1500K, lossis lub wavelength ntawm 3 μm ntawm qhov kub ntawm 300K.
④ Colorimetric thermometers, tseem hu ua ob-xim ntsuas kub, muaj kev ntsuas zoo dua thaum siv hauv "qhov chaw qias neeg heev".
Hauv kev xaiv tus pas ntsuas kub, ntxiv rau qhov ntsuas kub uas yuav tsum tau muaj, ob qhov ntsuas ntawm tus pas ntsuas kub "kub hloov feem pua" thiab "emissivity hloov feem pua" kuj tseem ceeb heev rau kev xaiv qhov ntsuas kub kom raug:
① Qhov feem pua ntawm qhov ntsuas kub hloov pauv ntawm tus pas ntsuas kub yog hais txog kev hloov pauv ntawm cov nqi tso tawm ntawm cov khoom vim qhov kub hloov pauv. Rau cov ntsuas kub infrared, qhov feem pua ntawm qhov kub hloov pauv ntau dua, nws qhov rhiab heev.
② Qhov feem pua ntawm cov emissivity hloov pauv yog hais txog kev hloov pauv ntawm cov txiaj ntsig ntawm cov khoom siv thaum lub emissivity ntawm qhov ntsuas lub hom phiaj hloov. Txij li thaum lub emissivity ntawm steel phaj hloov random nyob rau hauv ib tug tej yam ntau yam ntawm ib tug tej yam wavelength thiab kub thaum lub sij hawm lub steel dov txheej txheem, qhov kev hloov nyob rau hauv cov zis tus nqi ntawm tus pas ntsuas kub los ntawm kev hloov nyob rau hauv emissivity tsis yog lub tiag tiag kub hloov ntawm lub hom phiaj. Yog li ntawd, nws tseem yuav tsum tau kho qhov emissivity hloov feem pua.
