unit ntawm lub teeb meter
Ntau tus neeg muas zaub yuav hais tias, Kuv xav yuav lub ntsuas hluav taws xob, thiab lawv yuav nug seb lub ntsuas hluav taws xob yog dab tsi! Tam sim no cia peb luv luv qhia illuminance. Illuminance yog ib chav tsev uas qhia txog lub teeb ci. Nws lub cev lub ntsiab lus yog lub luminous flux irradiated ntawm ib cheeb tsam. Chav tsev ntawm illuminance yog tus naj npawb ntawm lumens (Lm) ib square meter, kuj hu ua Lux (Lux): 1Lux=1Lm / m2. Nws tuaj yeem pom los ntawm cov qauv saum toj no uas Lm yog ib chav tsev ntawm luminous flux, uas txhais tau tias yog lub teeb hluav taws xob los ntawm cov platinum ntshiab hauv lub kaum ntse ntse ntawm 1 steradian tshaj qhov chaw ntawm 1/60 square meters ntawm qhov kub thiab txias. (kwv yees li 1770 degree).
Cov lus piav qhia saum toj no ntawm chav luminance zoo li yog qhov theoretical heev, thiab nws feem ntau nyuaj rau kev nkag siab. Txhawm rau kom muaj kev nkag siab ntau ntxiv ntawm qhov sib piv, piv txwv li, 100W incandescent teeb emits tag nrho cov luminous flux txog 1200Lm. Yog hais tias nws yog assumed tias lub luminous flux yog tusyees faib nyob rau hauv lub hemisphere, qhov kev ncua deb ntawm lub teeb qhov chaw Lub illuminance tus nqi ntawm 1m thiab 5m yuav tau raws li nram no cov kauj ruam: cheeb tsam ntawm lub hemisphere nrog ib lub vojvoog ntawm 1m yog 2π × 12=6.28 m2, thiab tus nqi illuminance ntawm 1m ntawm lub teeb qhov chaw yog: 1200Lm / 6.28 m2=191Lux. Ib yam li ntawd, thaj tsam ntawm ib hemisphere nrog ib lub vojvoog ntawm 5m yog: 2π × 52=157 m2, thiab tus nqi illuminance ntawm qhov deb ntawm 5m ntawm lub teeb qhov chaw yog: 1200Lm / 157 m2=7.64Lux.
Qhov xwm txheej dav dav: nyob rau lub caij ntuj sov, nws yog li 100000LUX nyob rau hauv lub hnub; Nyob rau ib hnub pos huab, sab nraum zoov illuminance yog 10000LUX; Lub teeb fluorescent sab hauv tsev yog 100LUX; Lub illuminance yog 10LUX; qhov illuminance ntawm txoj kev teeb thaum hmo ntuj yog 0.1LUX; lub illuminance ntawm tswm ciab (ntawm qhov deb ntawm 20cm) yog 10-15LUX.
Hais txog qhov no, txhua tus neeg yuav tsum muaj kev nkag siab ntau dua ntawm chav tsev ntawm lub ntsuas hluav taws xob. Qhov tseeb, lub illuminance meter yog dav siv nyob rau hauv factories, tsev kawm ntawv, tsev qiv ntawv, tsev lag luam, tsev so, coj mus muag exhibition halls, kuaj, computer chav, thiab lwm yam, cov chaw no yuav tsum tau siv lub illuminance meter. Nws tuaj yeem hais ntau dhau los hais tias ntev li ntev tau muaj lub teeb ci, lub ntsuas hluav taws xob tuaj yeem siv los ntsuas qhov ntsuas tam sim no.
Hnub ci hnub ci: 30000 ~ 300000LUX ntau lawm Rhiav 10 ~ 500LUX
Huab cua hnub: 3000LUX Chaw Haujlwm 30 ~ 50LUX
Sunrise thiab hnub poob: 300LUX tsev noj mov 10 ~ 30LUX
Lub hli puv: {{0}}.3 ~ 0.03LUX Txoj Kev 5 ~ 10LUX
Hnub qub: {{0}}.0002~0.00002LUX Chaw nres tsheb 1~5LUX
Hmo ntuj tsaus: {{0}}.003~0.0007LUX
Raws li ib txwm muaj, peb tau yooj yim dua nyob rau hauv ib puag ncig teeb pom kev zoo li ntawm 250-750LUX. Lub teeb pom kev siab dhau lossis ntau dhau tuaj yeem ua rau tib neeg lub qhov muag. Qhov ncaj tshaj ib qho yog myopia, thiab feem ntau ntawm myopic ob lub qhov muag yog nyob rau hauv tsawg heev illumination. Kev nyeem ntawv ntev lossis siv qhov muag ntau dhau ntawm ib puag ncig kuj tsim nyog rau peb mloog.
Illuminance meter chav tsev thiab daim ntawv thov tej yam kev mob
Scope ntawm kev siv lub teeb meter
Illumination yog ze ze rau tib neeg lub neej. Piv txwv li, lub teeb txaus tuaj yeem tiv thaiv tib neeg los ntawm kev sib tsoo. Ntawm qhov tsis sib xws, lub teeb ci dhau lawm tuaj yeem ua rau tib neeg qaug zog ntau dua li qhov muag lawv tus kheej. Yog li ntawd, tsis xis nyob lossis teeb pom kev tsis zoo yog ib qho ua rau muaj kev sib tsoo thiab qaug zog. Cov kev txheeb xyuas uas twb muaj lawm qhia tau hais tias kwv yees li 30 feem pua ntawm tag nrho cov neeg ua haujlwm raug mob yog ncaj qha lossis tsis ncaj los ntawm lub teeb tsis txaus. Lub teeb pom kev ntawm lub chaw ntau pob (chaw) yog nruj heev. Lub teeb muaj zog dhau los yog tsaus dhau yuav cuam tshuam rau qhov kev ua si.
Yog li, ua li cas txog kev nyiam huv ntawm sab hauv tsev sib txawv uas tib neeg nyob? Illuminance yog qhov taw qhia tseem ceeb heev hauv kev nyiam huv. Lub teeb hais txog cov hluav taws xob hluav taws xob uas tuaj yeem ua rau tib neeg lub qhov muag pom kev kaj, thiab qhov kev xaav uas tuaj yeem tsim tau thaum lub teeb nkag mus rau hauv lub qhov muag hu ua kev pom. Lub teeb uas tib neeg pom yog hais txog lub teeb pom kev, thiab nws lub wavelength ntawm 380 mus rau 760 nm (nanometers).
Tam sim no, teeb pom kev zoo tuaj yeem muab faib ua ob pawg: lub teeb pom kev zoo thiab teeb pom kev zoo. Lub teeb pom kev zoo yog hais txog lub teeb pom kev zoo ntawm sab hauv tsev thiab hauv cheeb tsam, suav nrog cov hnub ci ncaj qha tawg tawg lub teeb thiab pom lub teeb los ntawm cov khoom nyob ib puag ncig, uas feem ntau qhia los ntawm hnub ci coefficient thiab ntuj illuminance. Hnub ci coefficient yog hais txog qhov sib piv ntawm thaj chaw zoo ntawm lub hnub ci qhib rau hauv pem teb hauv tsev. Lub hnub ci coefficient ntawm qhov chaw nyob dav dav yog nyob nruab nrab ntawm 1/5 thiab 1/15, thiab thaj chaw nyob yog nyob nruab nrab ntawm 1/8 thiab 1/10 (qhov rais cheeb tsam / sab hauv pem teb). Lub ntuj illuminance coefficient yog siv los ntsuas qhov illuminance theem ntawm lub teeb ntuj. Nws qhia txog kev sib raug zoo ntawm lub teeb sab hauv thiab sab nraum zoov. Nws kuj qhia txog lub teeb pom kev zoo hauv zos (cov txiaj ntsig ntawm lub teeb pom kev zoo thiab lub hnub ci teeb pom kev zoo rau huab cua).
Txhawm rau kom ntseeg tau tias tib neeg nyob hauv lub teeb pom kev zoo, kuv lub teb chaws tau tsim cov qauv kev nyiam huv rau sab hauv tsev (nrog rau cov chaw pej xeem) illumination. Piv txwv li, lub teeb pom kev zoo ntawm cov khw muag khoom (khoom) hauv cov chaw pej xeem yog ntau dua lossis sib npaug li 100Lx; tus qauv kev tu cev ntawm countertop illumination ntawm cov tsev qiv ntawv, tsev cia puav pheej, art galleries thiab exhibition halls yog ntau tshaj los yog sib npaug rau 100Lx; tus qauv illumination kev tu cev ntawm cov chav dej pej xeem muaj ntau dua lossis sib npaug li 50Lx; chav dej (dej, pas dej, tub da dej) Ntau dua lossis sib npaug li 30Lx, sauna Ntau dua lossis sib npaug li 30Lx. Cov qauv txawv teb chaws rau kev teeb pom kev sab hauv tsev, xws li lub teb chaws Yelemees pom zoo ntau lub teeb pom kev zoo, 300Lx rau chaw ua haujlwm nrog rau thaj chaw ua haujlwm, 750Lx rau kev ntaus ntawv thiab kos duab ua haujlwm; nyob rau hauv factories, illuminance yuav tsum tau rau kev pom kev ua hauj lwm ntawm cov kab ntau lawm yog 1000Lx; 200Lx rau tsev so thiab cov chav pej xeem; 200Lx rau cov ntsiab lus txais tos thiab cov neeg txais nyiaj; 1500-2000Lx rau lub qhov rais khw; 150-200Lx rau tsev kho mob pawg ntseeg thiab 500Lx rau thaj chaw kho mob xwm txheej ceev; 400-700Lx rau tsev kawm ntawv thiab chav kawm; 400-700Lx rau tsev kawm ntawv thiab chav kawm; Gym yog 300Lx thiab lwm yam.
Rau txoj kev ntsuas ntawm illuminance, nws yog feem ntau ntsuas nrog lub illuminometer. Lub illuminometer tuaj yeem ntsuas qhov sib txawv ntawm qhov sib txawv wavelengths (xws li ntsuas qhov pom lub teeb thiab ultraviolet wavelengths), thiab tuaj yeem muab cov neeg tuaj yeem ntsuas qhov tseeb.
Hauv ib lo lus, illuminance thiab tib neeg kev noj qab haus huv, tshwj xeeb tshaj yog kev noj qab haus huv ntawm lub qhov muag, muaj qhov tseem ceeb ntawm kev tu cev. Qhov teeb pom kev zoo sab hauv tsev thiab kev ua neej nyob zoo tuaj yeem ua rau koj muaj ob lub qhov muag ci thiab noj qab nyob zoo, uas yog koj txoj kev zoo siab mus ib txhis.
Cov saum toj no yog daim ntawv thov ntawm illuminance meters hauv lub neej. Qhov tseeb, illuminance meters kuj tau siv dav hauv ntau lub lag luam thiab tau txais txiaj ntsig zoo.
Illuminance meter xav tau rau kev thov
● Me me thiab lub teeb yuag (Compact Size, Lub teeb yuag)
Cov cib fim rau cov ntsuas hluav taws xob siv tau yog qhov dav heev, thiab lawv feem ntau siv rau ntau qhov chaw. Yog li ntawd, portable illuminance meters nrog me me thiab lub teeb yuag yog lub prerequisites rau illuminance meters.
● Qhov tseeb﹝ Muaj tseeb﹞
Seb lub illuminance meter yog qhov zoo los yog phem yog ze ze rau nws qhov tseeb. Ntawm chav kawm, nws kuj yog ze ze rau nws tus nqi. Yog li ntawd, nws yog ib qho tsim nyog yuav tau yuav lub teeb pom kev zoo illuminometer ntawm tus nqi tsim nyog. Feem ntau, qhov yuam kev yuav tsum tsis pub tshaj ± 15 feem pua.
● Xim Xaus ﹝ Xim Xim ﹞
Cov hom teeb pom kev zoo yog tag nrho-encompassing, ib txhia nyiam cov teeb liab siab siab nrog lub wavelengths ntev, los yog xiav-violet teeb nrog luv wavelengths xws li Daylight fluorescent teeb; kuj tseem muaj ntau qhov sib npaug sib npaug xws li cov qij incandescent, tib lub illuminometer yuav muaj qhov sib txawv me ntsis rau qhov sib txawv wavelengths. Sib txawv, yog li tsim nyog them nyiaj.
● Cosine Compensation﹝Cosine Compensation﹞
Peb txhua tus paub tias qhov ci ntsa iab ntawm qhov ci ntsa iab yog cuam tshuam nrog qhov xwm txheej ntawm lub teeb ci. Rau tib lub laj thawj, thaum ntsuas nrog lub illuminometer, lub sensor (Sensor) thiab qhov xwm txheej ntawm lub teeb ci yuav cuam tshuam rau kev nyeem ntawv tus nqi ntawm lub illuminometer. Yog li seb lub illuminometer zoo muaj qhov ua haujlwm ntawm cosine nyiaj tsis tuaj yeem tsis quav ntsej.
