Research On The Influence Analysis Of Dynamic Glare Evaluation Under Kinetic Visual Acuity Changes

Dynamic glare is the feeling that drivers face visual discomfort when driving at night.How to accurately evaluate and effectively prevent the discomfort is great significance to ensure the safety of life and property of road drivers.The blur caused by dynamic diopter observed by drivers is one of the main factors affecting the evaluation of dynamic glare.Therefore,exploring the influence of kinetic visual acuity changes on dynamic glare has important practical application value.In the process of dynamic glare evaluation,it is difficult to directly obtain the blurred images observed when kinetic visual acuity decreases.In this thesis,the circle of confusion change model of human retinal imaging is established by using Zemax OpticStudio software.By changing the size of the circle of confusion projected on the retina,the real simulation of the refractive effect of human eyes is realized.The relative error between the simulation results and the calculation results is less than 1%.Through the analysis,it is concluded that the corrected diopter has a linear relationship with the size of circle of confusion,and the goodness of fit is 0.99972.The fitting effect is good.The above results show that the model can effectively simulate the blurred images observed by human eyes under different diopters and the changes of the size of circle of confusion on the retina to a certain extent.This model can be used to simulate the blurred images observed by drivers when their kinetic visual acuity is decreased,and provide a theoretical basis for evaluating dynamic glare.Under the condition that the existing Threshold Increment cannot accurately evaluate the dynamic glare,in this thesis,based on the dynamic visual characteristics of drivers,combines the essence of the reduction of Kinetic visual acuity and the root cause of the dynamic glare phenomenon with the equivalent veiling brightness perceived by drivers through the design of a reasonable experimental scheme.To explore the mechanism of dynamic glare phenomenon and explore the relationship between kinetic visual acuity change and dynamic glare.Through the outdoor road experiments,driving speed in the range of 0～70km/h,it is concluded that the pupil of the drivers has no obvious change trend with the increase of driving speed.The relationship between drivers’ kinetic visual acuity and their driving speed was obtained by measuring drivers’kinetic visual acuity under outdoor road lighting conditions.Based on the analysis of the fundamental difference between dynamic glare and static glare,the equivalent veiling brightness data under different kinetic visual acuity and static visual acuity conditions in various road lighting environments were calculated and analyzed respectively.The difference coefficients of dynamic glare and static glare were solved by brightness comparison method.Finally,the dynamic glare evaluation model under the change of kinetic visual acuity was established,which provided the basis and solution for the objective evaluation of dynamic glare.