Cov pa roj carbon dioxide yog cov roj tsis muaj xim thiab tsis muaj ntxhiab tsw. Nws yog ib qho tseem ceeb tshaj plaws ntawm cov huab cua. Raws li lub ntsiab reactant ntawm photosynthesis, qhov concentration ntawm CARBON dioxide yog ncaj qha ntsig txog cov photosynthetic efficiency ntawm cov qoob loo, thiab txiav txim siab loj hlob thiab kev loj hlob, loj hlob theem, kev nyuaj siab, zoo thiab yield ntawm cov qoob loo. Tab sis ntau dhau ntawm nws yuav tsis tsuas yog tsim cov nyhuv tsev cog khoom thiab lwm yam teebmeem, tab sis kuj ua rau tib neeg noj qab haus huv. Ntawm 0.3 feem pua, tib neeg muaj mob taub hau, thiab ntawm 4-5 feem pua lawv xav tias kiv taub hau. Ib puag ncig sab hauv tsev, tshwj xeeb tshaj yog nyob rau hauv cov chav cua txias, kuj raug kaw. Yog tias tsis muaj qhov cua rau lub sijhawm ntev, qhov concentration ntawm carbon dioxide yuav maj mam nce, uas yog teeb meem rau tib neeg kev noj qab haus huv. Raws li tus qauv huab cua zoo nyob hauv tsev siv hauv xyoo 2003, tus qauv tus nqi ntawm qhov ntim feem ntawm qhov nruab nrab txhua hnub carbon dioxide cov ntsiab lus yuav tsum tsis pub tshaj 0.1%.
Nrog rau kev txhim kho txuas ntxiv ntawm kev tshawb fawb thiab thev naus laus zis, kev txhim kho ntawm tib neeg txoj kev ua neej nyob thiab tib neeg tau txais kev mloog zoo rau kev tiv thaiv ib puag ncig, kev saib xyuas kom muaj nuj nqis thiab tswj cov pa roj carbon dioxide tau dhau los ua kev xav tau ntau ntxiv hauv cov cua txias, kev ua liaj ua teb, kev kho mob, tsheb thiab kev tiv thaiv ib puag ncig. .Cov pa roj carbon dioxide sensors tau siv dav hauv kev lag luam, kev ua liaj ua teb, kev tiv thaiv hauv tebchaws, kev kho mob thiab kev noj qab haus huv, kev tiv thaiv ib puag ncig, aerospace thiab lwm yam haujlwm.
Lub hauv paus ntsiab lus ua haujlwm ntawm carbon dioxide sensor yog qhia hauv qab no.
Txhua yam khoom muaj nws tus yam ntxwv ci-kab spectrum, thiab sib haum xeeb nqus spectrum, zoo li cov pa roj carbon dioxide molecules. Lub lattice vibration ntawm cov ntaub ntawv ceramic thiab lub zog hluav taws xob muaj kev cuam tshuam, qhov kub thiab txias nce, lub lattice vibration yog muaj zog, lub amplitude yog nce, lub hindrance electron kev ua kom muaj zog. Raws li txoj kev xav ntawm kev xaiv roj av, thaum lub emission wavelength ntawm lub teeb pom kev zoo sib xws nrog lub zog nqus ntawm cov pa, resonance absorption yuav tshwm sim, thiab nws qhov nqus nqus yog cuam tshuam nrog cov concentration ntawm cov pa. Qhov concentration ntawm cov roj tuaj yeem ntsuas tau los ntawm kev ntsuas qhov nqus nqus ntawm lub teeb.
Tam sim no, muaj ntau yam carbon dioxide sensors, xws li thermal conductivity hom, densitometer hom, hluav taws xob nqus hom, hluav taws xob conductivity hom, tshuaj haum hom, electrochemical hom, chromatography hom, huab hwm coj spectrum hom, infrared optical hom thiab hais txog.
Infrared absorption carbon dioxide gas sensor yog raws li lub hauv paus ntsiab lus hais tias qhov nqus spectrum ntawm cov pa sib txawv nrog cov khoom sib txawv. Cov pa roj carbon dioxide sensor los ntawm infrared teeb tsav tsheb Circuit Court tswj nyob rau hauv ib tug ruaj band infrared, nqus cov pa nyob rau hauv kev ntsuam xyuas, infrared lub teeb amplitude hloov, dua los ntawm lub kos xam rau cov kev hloov nyob rau hauv roj concentration, lub sensor tso zis teeb liab tom qab lim, txhim khu kev qha thiab ADC sau thiab hloov dua siab tshiab, cov tswv yim rau lub microprocessor, microprocessor system raws li cov ntaub ntawv sau los them nyiaj rau qhov sib xws, siab, kub, siab, Thaum kawg suav cov pa roj carbon dioxide density tawm mus rau ib qho khoom siv hauv kev sim. Nws feem ntau suav nrog tunable diode laser absorption spectroscopy, photoacoustic spectroscopy, kab noj hniav txhim kho spectroscopy thiab non-spectral infrared spectroscopy. Infrared absorption sensor muaj ntau yam zoo, siab rhiab heev, ceev tsom xam ceev, zoo stability, thiab lwm yam.
Electrochemical CARBON dioxide gas sensor yog cov tshuaj sensor uas hloov cov concentration (los yog ib nrab siab) ntawm carbon dioxide rau hauv cov teeb liab hluav taws xob los ntawm cov tshuaj tiv thaiv electrochemical. Raws li kev txheeb xyuas cov teeb liab hluav taws xob, hom electrochemical tau muab faib ua hom muaj peev xwm, hom tam sim no thiab hom capacitance. Raws li daim ntawv ntawm electrolyte, muaj kua electrolytes thiab khoom electrolytes. Txij li xyoo 1970s, cov khoom siv hluav taws xob electrolyte CARBON dioxide sensors tau muaj kev txhawj xeeb los ntawm cov kws tshawb fawb. Lub hauv paus ntsiab lus ntawm cov khoom siv electrolyte CARBON dioxide sensor yog tias cov khoom siv roj-rhiab heev tsim cov ions thaum dhau los ntawm cov pa roj, yog li tsim cov hluav taws xob hluav taws xob thiab ntsuas lub zog hluav taws xob kom ntsuas qhov ntim ntawm cov roj.
Kev siv cov thermal conductivity sib txawv ntawm CARBON dioxide thiab lwm cov pa roj carbon dioxide gas sensor kuj yog thawj zaug siv los ntes cov pa roj carbon dioxide sensor. Tab sis nws rhiab heev yog tsawg.
Nto acoustic nthwv dej (pom) roj sensor nyob rau hauv lub piezoelectric siv lead ua txheej txheej ntawm kev xaiv adsorption ntawm cov roj ntawm cov roj rhiab zaj duab xis, thaum cov roj rhiab films cuam tshuam nrog cov roj hauv kev sim, ua rau cov roj rhiab zaj duab xis txheej zoo, cov yam ntxwv xws li viscoelasticity thiab Kev hloov pauv hloov, ua rau lub ntsej muag acoustic yoj zaus ntawm piezoelectric siv lead ua kom ya raws, txhawm rau txheeb xyuas qhov concentration ntawm cov pa. Qhov saum npoo av acoustic yoj (SAW) gas sensor yog ib yam ntawm cov huab cua rhiab heev sensor. Tsis tas li ntawd, lub quartz siv lead ua microbalance gas sensor ua haujlwm ntawm lub hauv paus ntsiab lus zoo sib xws rau SAW sensor, yog li nws kuj yog rau lub sensor loj. Qhov loj rhiab sensor nws tus kheej tsis muaj selectivity rau roj los yog vapor, thiab nws cov selectivity raws li ib tug tshuaj sensor tsuas yog nyob ntawm seb cov khoom ntawm txheej txheej.
Lub semiconductor carbon dioxide gas sensor siv lub semiconductor roj sensor raws li cov pa sensor, thiab cov hlau oxide semiconductor carbon dioxide gas sensor muaj cov yam ntxwv ntawm cov lus teb ceev ceev, muaj zog ib puag ncig tiv thaiv thiab ruaj khov qauv.
Post lub sij hawm: Aug-14-2020
