Nyob rau hauv cov xwm txheej dab tsi ua qhov illumination theem ntawm blackboard teeb ua tau raws li qhov xav tau siab?
Compared with classroom lamps, we need to pay more attention to the lighting of the blackboard. The difficulty of blackboard lamps is higher than that of classroom lamps. Generally, two single-tube fluorescent lamps are used as lighting lamps for classroom blackboards, and the installation position and height of blackboard lamps are They are relatively fixed, and the distance between the upper and lower sides of the blackboard is very large. How to make the illumination level of the blackboard meet the high requirements under such conditions is a big problem. Here we use a specific example to illustrate:
Qhov tshwj xeeb me me ntawm daim duab teeb ntawm lub teeb dub tau teeb tsa hauv chav kawm, los ntawm kev suav, peb tuaj yeem tau txais tias lub kaum sab xis ntawm ob kab ncaj nraim los ntawm qhov nruab nrab ntawm lub teeb mus rau sab saum toj thiab hauv qab ntug ntawm lub blackboard yog txog 35 degree. Yog tias feem ntau ntawm cov teeb pom kev zoo ntawm cov teeb pom kev dub tuaj yeem ua kom pom tseeb hauv 40 degree -45 degree lub kaum sab xis, peb tuaj yeem ua qhov feem ntau ntawm cov teeb. Nws yog daim duab qhia txog lub teeb pom kev ntawm lub teeb lub teeb dub uas tuaj yeem faib cov teeb pom kev zoo, los ntawm qhov peb tuaj yeem pom tias feem ntau ntawm cov luminous flux nyob rau hauv kev coj ntawm 270 degree -0 degree ntawm lub teeb yog concentrated nyob rau hauv ntau yam. ntawm 300 degree mus rau 345 degree (peb siv 50 feem pua ntawm qhov siab tshaj plaws lub teeb siv ntawm ob lub rays), thiab lub teeb tso zis ze ntawm 300 degree yog tsawg tshaj li qhov ze 340 degree. Raws li qhov cuam tshuam qhov loj me, qhov kev ncua deb ntawm lub teeb lub teeb dub mus rau sab ntug ntawm lub blackboard yog 1.75 npaug ntawm qhov kev ncua deb mus rau ntawm ntug ntawm lub blackboard, yog li lub teeb tso tawm mus rau sab ntug ntawm lub blackboard yuav tsum ntau dua, yog li ntawd. lub illumination ntawm lub blackboard yuav zoo ib yam. .
Yog hais tias tus tsim ntawm lub blackboard teeb tsis tsim nyog txaus, yuav muaj ob peb lub sijhawm tom qab kev teeb tsa:
1. Lub teeb tso zis ntau dhau, ua rau lub hauv paus ntawm lub blackboard yuav ci heev thiab lub peripheral ib qho tsaus nti, thiab uniformity ntawm illumination yuav tsis tsim nyog. Raws li pom nyob rau hauv daim duab 5, lub teeb tso zis ntawm lub luminaire nyob rau hauv cov kev taw qhia ntawm 270 degree -0 degree kuj yog heev concentrated, tab sis nws yog heev concentrated. Lub teeb tso zis ntawm lub teeb yog qhov tseem ceeb nyob rau hauv thaj tsam ntawm 30 degree, thiab nws yog ib qho nyuaj rau kev saib xyuas ntawm lub sab sauv thiab sab ntug ntawm tag nrho cov blackboard, thiab yuav muaj inevitably yuav muaj ib qho teeb meem uas lub uniformity ntawm lub blackboard yog tsawg heev. ib kawg.
2. Lub teeb faib ntawm lub teeb yog tawg dhau, thiab lub teeb nruab nrab ntawm lub teeb tsis yog qhov tseem ceeb, yog li qhov xwm txheej ntawm ntug ntawm cov ntawv dub yog ci dhau lawm thiab cov ntug hauv qab yog tsaus dhau tsis ua raws li qhov yuav tsum tau ua. Raws li pom hauv daim duab 6, lub teeb siv lub teeb hloov ntawm 270 degree -0 degree thiab 0 degree -90 degree ntawm lub teeb tsis pom tseeb, thiab lub teeb siv lub teeb coj mus rau sab sauv ntawm lub blackboard thiab sab ntug ntawm lub blackboard yog yeej ib yam. Qhov kev ncua deb peb kwv yees ua ntej kev teeb tsa yog 1.75 npaug. Kev sib raug zoo ntawm kev ncua deb thiab lub teeb ci tuaj yeem suav tau los qhia tias qhov sib txawv ntawm lub teeb pom kev yog li 3 zaug. Nyob rau hauv no txoj kev, lub illumination uniformity thaum kawg tau yog hais txog 0.5 thiab nws yog ib qhov nyuaj rau ua tau raws li qhov yuav tsum tau ntawm 0.7.
3. Lub teeb pom kev zoo ntawm lub teeb ua tau raws li qhov yuav tsum tau ua, tab sis tag nrho cov luminous flux ntawm lub teeb qhov chaw yog tsawg dhau, yog li qhov nruab nrab illuminance ntawm tag nrho cov blackboard tsis tuaj yeem ua tau raws li tus qauv yam tsawg kawg nkaus ntawm 500lx.
in conclusion
1. Muaj ntau hom teeb hauv chav kawm, thiab tsis muaj qhov sib txawv ntawm qhov zoo thiab qhov tsis zoo. Qhov tseem ceeb yog ua ke cov teeb nrog qhov kawg siv qhov chaw. Tsuas yog los ntawm kev siv cov teeb pom kev zoo tuaj yeem siv cov yam ntxwv loj tshaj plaws ntawm cov teeb pom kev zoo, thiab qhov zoo tuaj yeem zam tau, txhawm rau txhim kho lub teeb pom kev zoo thiab txo lub zog noj. .
2. Lub teeb siv hluav taws xob sib faib ntawm cov teeb yuav tsum tau txiav txim siab nyob rau hauv theem tsim ntawm cov teeb pom kev ntawm lub teeb dub, thiab lub teeb yuav tsum tau cuam tshuam rau qhov chaw uas nws xav tau. Lub teeb pom kev zoo ntawm lub teeb lub teeb dub tsis tuaj yeem cuam tshuam qhov kev siv tiag tiag ntawm lub teeb, thiab nws nyob ntawm seb qhov 50 feem pua siab tshaj plaws lub teeb siv lub kaum ntse ntse yog qhov tsim nyog.
