Yuav ua li cas los daws qhov teeb meem ntawm lub hwj chim hauv daim ntawv thov ntawm LED txoj kev teeb

Yuav ua li cas los daws cov teeb meem hluav taws xob hauv daim ntawv thov ntawm LED txoj kev teeb hauv kev siv LED txoj kev teeb, muaj teeb meem ntawm kev teeb tsa teeb pom kev zoo raws li "lub zog" Performance index ntawm cov teeb. Txawm li cas los xij, yog tias tag nrho cov teeb pom kev zoo thiab kev siv tus nqi ntawm LED teeb thiab sodium teeb tsis raug grasped, nws yog ib qho yooj yim uas yuav ua rau tsis txaus luminous flux los yog heev ci hauv av, raws li qhia nyob rau hauv daim duab 7. Qhov no yog vim li cas peb xav tau yog lub brightness ntawm av. Raws li cov yam ntxwv ntawm cov khoom siv hauv av, peb tuaj yeem tau txais lub teeb pom kev hauv av, tau txais qhov xav tau luminous flux raws li lub teeb pom kev zoo, thiab thim rov qab cov luminous flux ntawm lub teeb raws li kev siv tus nqi, kev saib xyuas, thiab kev teeb tsa ntawm lub teeb.

Tom qab tau txais qhov kev txiav txim siab luminous flux, peb tuaj yeem xam lub zog raws li qhov ua tau zoo ntawm lub teeb. Yog tias siv hluav taws xob ncaj qha, ntau yam tsis paub meej saum toj no yuav cuam tshuam rau qhov tsim nyog ntawm kev xaiv hluav taws xob. 1. Kev tsim teeb pom kev zoo tsis muaj qhov ntsuas kev nyab xeeb thiab cuam tshuam, xws li Lav, U0, UL, TI, SR, I80, thiab lwm yam.

Nws yuav tsum tau ntsuas txoj kev teeb pom kev zoo, tab sis muaj cov ntsuas kev nyab xeeb thiab teeb pom kev zoo. Lav yog qhov taw qhia cuam tshuam rau kev nyab xeeb ntawm kev tsav tsheb thiab kev muaj peev xwm tsheb; U0 yog qhov taw qhia cuam tshuam rau kev nyab xeeb ntawm kev tsav tsheb thiab kev muaj peev xwm tsav tsheb; UL yog qhov taw qhia cuam tshuam rau kev nyab xeeb ntawm kev tsav tsheb; TI yog qhov qhia txog kev nyab xeeb ntawm kev tsav tsheb; SR yog qhov ntsuas cuam tshuam rau kev tsav tsheb; I80 yog qhov ntsuas qhov cuam tshuam rau kev tsav tsheb. Nws yuav tsum tau muab sau tseg tias brightness muaj feem xyuam rau luminous flux / av reflection coefficient / saib lub kaum sab xis / projection nto loj, thiab lwm yam

Cov neeg tsav tsheb feem ntau saib ntawm txoj kev 60-160 meters deb thiab pom qhov ci ntsa iab cuam tshuam rau tib neeg lub qhov muag. Lub teeb pom kev zoo tsis yog qhov hloov pauv rau Brightness Index. Lub conversion luminance factor Q ntawm illuminance thiab luminance yog non-linear raws li kev tsav tsheb.

Qhov ntau uniform lub illumination, ntau uniform lub brightness yog tsis tas. Yog li, UE tsis tuaj yeem hloov UL. Kev txiav txim los ntawm cov teeb pom kev zoo raws li qhov pom kev pom thiab ci ntsa iab, raws li "high uniformity ntawm illuminance" lub teeb faib, qhov ntsuas UL yog tsawg dua 0.7, thiab yuav muaj kev pom tseeb zebra hla hauv av; Raws li "siab tag nrho uniformity raws li brightness", qhov ntsuas UL yog ntau tshaj 0.7.

Sib piv cov teeb pom kev zoo ntawm sodium teeb thiab LEDs nyob rau hauv tib lub Ul, lub teeb pom kev zoo ntawm sodium teeb ntxoov ntxoo txiav txim siab tias muaj teeb pom kev zoo dua, thiab cov teeb pom kev zoo ntawm LEDs ua rau lub teeb pom kev tsawg dua. Lub teeb tsis pom kev tuaj yeem ua rau qee qhov tsis muaj qhov ci nyob rau hauv qhov tsaus ntuj, lossis ua kom pom kev ci ntsa iab tsawg dua. Piv nrog rau cov LEDs dawb, cov xim ntawm sodium lub teeb qhov chaw tom qab lub teeb attenuation yog ze rau asphalt pavement, cov xim sib piv ntawm sodium teeb qis dua, thiab muaj peev xwm paub qhov txawv lub teeb thiab tsaus ntuj nyob rau hauv sodium teeb ib puag ncig yog qis dua.

Yog li ntawd, nyob rau hauv tib lub Ul, sodium teeb thiab LED teeb qhov chaw muaj feem ntau yuav tsim zebra hla. Tsis tas li ntawd, nws tau pom tias TI10% yog qhov yooj yim heev kom dhau tus qauv, thiab TI20% glare tsis muaj neeg xiam. Yog tias tseem tsis tau txheeb xyuas, qhov kev tsis taus lossis nce qib ntawm "kev tsis taus" yuav tshwm sim.

I80 yog ntau dua 200cd / m2, thiab thaj chaw teeb pom kev zoo ntawm lub teeb me me (xws li cob LED txoj kev teeb), uas yooj yim ua rau tsis xis nyob glare.