Research On Visual Performance Of Color Temperature And Energy Saving In Tunnel Lighting

The tunnel is a semi-closed tubular structures,because of its particularity,there will be "black hole","black box","white hole","visual lag" and other visual phenomenon when passengers through the tunnel.In order to reduce the adverse effect of visual phenomenon to ensure the safety of traffic in tunnel,tunnel needs lighting.At present,the quality of tunnel lighting is mainly base on average brightness,brightness uniformity.However,most area of tunnel are belong to middle visual environment,luminance meter or the method of measuring luminance are both based on photonic vision.In addition,the tunnel lighting quality evaluation with luminance can not reflect the influence which photo-biological effects on human body.The paper focuses on color temperature and using visual performance which is the most direct and effective way in middle visual field,through two tests to research(One test is color temperature and the small target visibility,the other one is color temperature and visual performance),research deeply the influence of visual performance of color temperature from visibility and reaction time.At last,analysis the energy-saving effect of color temperature which base on equivalent lighting energy-saving concept.The main content and conclusion of this paper as follows:?In the theoretical aspect,the paper from tunnel lighting energy-saving and visual performance of color temperature to investigate domestic research at present,and points out tunnel lighting energy-saving mainly from optimization lighting parameters,pattern of lighting,tunnel lamps,light reflection ratio of side wall,lighting control,the natural light utilization in our country.According to visual performance,at first introduce the visual characteristic and evaluation method of tunnel.Then,from visibility and reaction time describe visual performance factors;?In test of color temperature and small target visibility aspect,with the help of self-made in-house model,research the influence of small target visibility which color temperature,size of small target,average luminance effect on,and conclude that:color temperature,average luminance,size of small target are proportional to the small target visibility.When the average luminance exceeds a certain luminance value,the small target visibility level gradually weaken.While the small target visibility is increasingly obvious as the size of small target increases;?In test of color temperature and visual performance aspect,with the use of self-made in-house mode,research the influence of time reaction which color temperature,contrast ratio,background luminance,visual angle effect on,and conclude that:color temperature and background luminance are inversely proportional to the reaction time,visual angle is proportional to the reaction time.The promoting effect of reducing reaction time is gradually weaken,shows that it is no use to visual performance and do harm to energy-saving when background luminance exceed a certain value.In addition,bigger background luminance can improve visual performance in visual peri-region;? In energy-saving of color temperature aspect.This paper analysis the energy-saving of color temperature which base on equivalent energy-saving concept,and conclude that:if the stander value of small target visibility is 6.03,in order to achieve the same visual environmental,4500K and 3000K will increase 125%and 400%energy consumption respectively,compared with 6000K;if the stander value of reaction time is 295 ms,in order to achieve the same visual operation ability,4000K and 3000K will increase 150%and 500%energy consumption respectively,compared with 5000K.