Yuav ua li cas yog lub ntsuas kub infrared nyob rau hauv kub dov?
1. Cov hauv paus ntsiab lus
Tag nrho cov khoom uas muaj qhov kub siab tshaj qhov txheeb ze zero yog tas li emitting infrared hluav taws xob hluav taws xob mus rau qhov chaw nyob ib puag ncig. Cov yam ntxwv ntawm hluav taws xob infrared ntawm ib yam khoom: Qhov loj thiab kev faib tawm ntawm hluav taws xob hluav taws xob los ntawm wavelength yog ze ze rau nws qhov kub thiab txias. Yog li ntawd, los ntawm kev ntsuas lub zog infrared tawm los ntawm ib qho khoom nws tus kheej, nws qhov kub thiab txias tuaj yeem ntsuas qhov tseeb, uas yog lub hom phiaj rau kev ntsuas kub ntawm infrared.
Infrared tus pas ntsuas kub, tseem hu ua infrared radiation kub ntsuas, yog ib lub tshuab uas siv cov hluav taws xob infrared tawm los ntawm cov khoom nws tus kheej los ntsuas qhov kub ntawm cov khoom. Infrared hluav taws xob, tseem hu ua infrared radiation, yog ib lub wavelength nyob ntawm 0.76 μ M ~ 1000 μ Cov hluav taws xob hluav taws xob nruab nrab ntawm m, rau qhov zoo tagnrho blackbody, tag nrho cov hluav taws xob hluav taws xob (xa mus rau tag nrho cov hluav taws xob lossis hluav taws xob siv hluav taws xob. ) ntawm tag nrho cov wavelengths emitted nyob rau hauv ib cheeb tsam cheeb tsam nyob rau hauv hemispherical qhov chaw yog proportional rau lub 4th hwj chim ntawm cov khoom kub:
Mb (T)=σ T4 (1)
Qhov no yog qhov tseeb Stephen Boltzmann txoj cai. ntawm σ= tsib taw tes rau rau cuaj xya × 10-8W/m2K4 yog hu ua Stephen Boltzmann tas li.
(1) Qhov sib npaug yog siv rau cov khoom siv tiag tiag thiab yuav tsum tau muab sib npaug los ntawm emissivity:
Mgb (T)=εσ T4
Nws tuaj yeem pom tau tias qhov emission siv siv Mgb (T) ntawm txhua yam khoom muaj feem xyuam rau nws qhov kub thiab txias. Lub emissivity ntawm ib yam khoom ε Nws yog ncaj qha cuam tshuam rau cov khoom ntawm nws cov khoom (muaj pes tsawg leeg, hlau tsis yog hlau, siv lead ua amorphous, thiab lwm yam), deg lub xeev (surface smoothness, roughness, oxidation degree, muaj kuab paug los yog nto txheej, thiab lwm yam). , thiab qhov kub ntawm qhov khoom. Ntev npaum li qhov hluav taws xob hluav taws xob ntawm cov khoom tuaj yeem raug xaiv kom raug, qhov ntsuas kub ntawm cov khoom ntsuas tau raug raug.
Lub ntsuas kub infrared yog tsim los ntawm peb qhov chaw: lub tshuab kho qhov muag, lub tshuab kuaj pom, thiab kev ua cov teeb liab. Lub luag haujlwm tseem ceeb ntawm lub tshuab kho qhov muag yog khaws cov hluav taws xob hluav taws xob ntawm lub hom phiaj ntsuas thiab sib sau ua ke mus rau lub ntsuas hluav taws xob infrared. Lub luag haujlwm ntawm lub ntsuas hluav taws xob infrared yog los hloov cov hluav taws xob tau txais infrared mus rau hauv hluav taws xob teeb liab rau cov zis.
