Illuminance meters ntsuas ntsuas ntsuas thiab qhov xwm txheej ntawm kev siv
Ntau tus neeg muas zaub yuav hais tias yog tias kuv xav yuav ib lub lux meter, lawv yuav nug seb chav tsev ntawm lux meter yog dab tsi! Tam sim no luv luv qhia lub illuminance. Illuminance yog ib chav tsev uas qhia txog kev siv lub teeb. 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 chav tsev ntawm luminous flux, uas txhais tau tias yog lub teeb hluav taws xob los ntawm thaj tsam ntawm 1/60 square metres ntawm platinum ntshiab nyob rau hauv lub kaum sab xis ntawm 1 steradian ntawm lub melting kub. (kwv yees li 1770 degree).
Cov lus piav qhia saum toj no ntawm chav teeb pom kev zoo li yog qhov theoretical heev, thiab nws feem ntau nyuaj rau kev nkag siab. Yuav kom muaj kev nkag siab ntau ntxiv ntawm qhov pom ntawm qhov pom, cia kuv muab piv txwv. Lub teeb 100W incandescent emits tag nrho cov luminous flux txog 1200Lm. Tus nqi illuminance ntawm 1m thiab 5m tuaj yeem tau txais raws li cov kauj ruam hauv qab no: thaj tsam ntawm lub hemisphere nrog lub vojvoog ntawm 1m yog 2π × 12=6.28 m2, thiab tus nqi illuminance ntawm 1m deb ntawm lub teeb 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.
Cov xwm txheej dav dav: Lub caij ntuj sov, nws yog li 100,000LUX hauv lub hnub; Nyob rau hnub huab cua, qhov pom kev sab nraum zoov yog 10,000LUX; lub teeb pom kev nyob sab hauv tsev yog 100LUX; peb illuminance ntawm lub desktop 60cm deb ntawm lub 60W rooj teeb yog 300LUX; illuminance ntawm chav tsev tshaj tawm hauv TV yog 1000LUX; Lub illuminance yog 10LUX; qhov illuminance ntawm txoj kev teeb thaum hmo ntuj yog 0.1LUX; lub teeb taws 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 lub ntsuas hluav taws xob. Qhov tseeb, lub illuminance meter yog dav siv nyob rau hauv factories, tsev kawm ntawv, tsev qiv ntawv, coj mus muag tsev, tsev so, coj mus muag exhibition halls, laboratory, computer chav, thiab lwm yam, cov chaw no yuav tsum siv illuminance meters. Nws tuaj yeem hais ntxiv tias ntev li ntev tau muaj lub teeb ci, lub teeb pom kev tuaj yeem siv los ntsuas qhov teeb pom kev tam sim no. Tam sim no kuv yuav muab rau koj qhov chaw tsim nyog illuminance siv tus nqi.
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 illuminance li ntawm 250-750LUX. Siab dhau los lossis ntau dhau qhov teeb pom kev zoo yuav ua rau tib neeg lub qhov muag puas. Qhov ncaj tshaj plaws yog myopia. Kev nyeem ntawv ntev lossis siv koj ob lub qhov muag ntau dhau ntawm ib puag ncig kuj tsim nyog rau peb mloog.
Chav tsev thiab kev siv cov xwm txheej ntawm illuminance meters
Lub Scope ntawm daim ntawv thov ntawm lub illuminance 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. Hloov pauv, lub teeb tsaus dhau tuaj yeem ua rau tib neeg qaug zog ntau dua li qhov muag lawv tus kheej. Tsis xis nyob lossis teeb pom kev tsis zoo yog li ntawd 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 ntau pob) yuav tsum nruj heev. Lub teeb muaj zog dhau los yog tsaus dhau yuav cuam tshuam rau qhov kev ua si.
