Reaction Time of Road Lighting in the Mesopic Vision Condition
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Abstract:
Brightness level of the mad lighting should be of the mesopic vision category. But the present road lighting standard in the various countries is in the bright vision condition, this is different with the mesopic vision effect, which will bring the appraisal error into the illumination quality. Therefore, studies on the mesopic vision condition through the reaction time of the road lighting have been the front research topic. Regarding this, this article introduces the middle vision reaction time test system which independently develops to carry on the photosource light effect the research. This system can adopt different light sources to form the illumination environment under the mesopic vision, simulate road barrier ahead the car at night with varied light, and examine reaction time according to visual characteristic of driver through electronic shutter. Through regression analysis of the massive measured data, the reaction time and the background halogen brightness function expression has been fitted under the different experimental condition, thus obtains the golden photosource vision effect to be higher than the sodium lamp photosource the conclusion. In the article, the system the structure, the principle of work, the experimental technique and the data processing result has carried on the analysis and the discussion. This research results which is founded in the mesopic visual condition the visibility model provide the experimental basis, which has the very good model significance for China road lighting project concrete implementation and the actual improvement.
