Ngaba yonke imicu yokukhanya ine-UGR?

I-metric ebizwa ngokuba yi-UGR, okanye i-Unified Glare Rating, isetyenziselwa ukuvavanya indlela ukukhanya okungathandekiyo ngayo okuvela kumthombo wokukhanya. Ekubeni i-UGR idla ngokunxulunyaniswa nezixhobo zokukhanyisa ezisemthethweni ezisetyenziswa kwiindawo zorhwebo nezobuchwephesha apho ulawulo lokukhanya lubalulekile khona, ayizizo zonke iziqwenga zokukhanya ezinale nqanaba.

Imicu yokukhanya ayinakudlula kwimigaqo efanayo yokuqinisekiswa okanye yovavanyo njengezixhobo zokukhanyisa eziqhelekileyo, ingakumbi ukuba zenzelwe ukukhanyisa okukufutshane okanye okuhombisayo. Nangona kunjalo, abavelisi banokunika umlinganiselo we-UGR okanye iinkcukacha malunga nolawulo lokukhanya ukuba umcu wokukhanya wenzelwe ukusetyenziswa kwiindawo apho ukukhanya kunokuba yingxaki.

Kucetyiswa ukuba uphonononge iinkcukacha zemveliso okanye uthethe nomvelisi ukuba ufuna umgca wokukhanya onomlinganiselo othile we-UGR.

Ekubeni i-UGR linani elimiselwa ziimilinganiselo ezithile, ukuvavanya i-Unified Glare Rating (UGR) yesibane se-LED kudla ngokubandakanya ukulandela inkqubo ebekiweyo. Isishwankathelo seenkqubo ezifunekayo ukuvavanya i-UGR sinikwe ngezantsi:

Lungiselela iNdalo:
Yenza uvavanyo kwindawo elawulwayo, njengegumbi elinoyilo olucwangcisiweyo kunye nonyango lomphezulu. Eminye imithombo yokukhanya enokuguqula idatha akufuneki ibekhona kwigumbi.
Izixhobo zokulinganisa:
Ukuze ubone ukuba umthombo wokukhanya kunye neendawo ezijikelezileyo zikhanya kangakanani, sebenzisa imitha yokukhanya. Qinisekisa ukuba imitha ilinganisiwe kwaye ifanelekile kuluhlu lokukhanya ekufuneka ulilinganise.
Misela iiNqaku zoMlinganiselo:
Misela iindawo zokulinganisa. Indawo yomjongi (ngokubanzi inqanaba lamehlo) kunye neendawo zemithombo yokukhanya (izibane ze-LED strip) zihlala zibandakanyiwe koku.
Bala ukukhanya:
Ngokwembono yomntu ojongayo, linganisa ukukhanya kwesibane se-LED kwii-engile ezahlukeneyo. Oku kuquka ukuthatha umlinganiselo wokukhanya kwii-engile ezibonisa ukukhanya okunokwenzeka kunye nokuvela ngqo kumthombo wokukhanya.

Bala i-UGR:
Sebenzisa ifomula ye-UGR, eqwalasela amaxabiso okukhanya alinganisiweyo, ii-engile zemithombo yokukhanya xa kuthelekiswa nomjongi, kunye nokukhanya okungasemva. Le fomula ilandelayo:
[
I-UGR = 8 \cdot \log_{10} \left( \frac{0.25 \cdot \sum_{i=1}^{n} L_i \cdot \Omega_i}{L_b} \right)
]

Apho:

(L_i) = ukukhanya komthombo wokukhanya (kwiikhandela ngemitha yesikwere)
( \Omega_i ) = i-engile eqinileyo yomthombo wokukhanya (kwii-steradians)
(L_b) = ukukhanya okungasemva (kwiikhandlela ngemitha yesikwere)

Hlalutya iziphumo:
Kwiimeko ezininzi, ixabiso le-UGR elingaphantsi kwe-16 lithathwa njengelamkelekileyo, nangona kunjalo ixabiso elingaphezulu kwe-19 linokubhekisela ekukhanyeni okukhulu.
Iirekhodi:
Ukuze ufumane ireferensi okanye iimfuno zokuthobela imithetho kwixesha elizayo, bhala phantsi zonke izilinganiso, ubalo, kunye neemeko zovavanyo.
Ukuthetha nengcali yokukhanyisa okanye inkampani egxile kuyilo kunye nokulinganisa izibane kunokuba luncedo ukuba awuqhelananga nenkqubo yovavanyo okanye awunazo izixhobo ezifunekayo.

Sine-strip entsha enokulwa nokukhanya, ncedaQhagamshelana nathiukuba ufuna ukwazi okungakumbi malungaumcu we-neon ochasene nokukhanya.

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