Study On Light Comfort And Evaluation Method Based On Physiological EEG Andworking Efficiency

The quality of the indoor environment greatly affects the work,mood and health of the staff.The indoor environment of buildings mainly consists of sound environment,light environment and thermal environment.Among them,the light environment has a significant impact on the human visual system.Visual system is one of the most precise and sensitive systems in the human body,so people should work in a good light environment.Otherwise,it will aggravate the accumulation of asthenopia and reduce the work efficiency of personnel.It is an effective and feasible means to improve social productivity to improve the working efficiency of personnel by improving their working environment.Therefore,how to evaluate and guide the design of indoor lighting environment through objective indicators has become the key to solve the problem.In this paper,different indoor light environments are studied and analyzed from four aspects of subjective light comfort,visual fatigue objective index,work efficiency and visual evoked EEG in different color temperature and illumination combination light environment,in order to obtain quantifiable evaluation methods.The main research contents and results are summarized as follows:(1)Subjective comfort of subjects in different light environments was studied by means of subjective questionnaires,including brightness,color authenticity,spatial spaciousness,fatigue and relaxation.The weight of five indexes was determined by entropy method,and then the light comfort of each light environment was obtained.Moderate total score;(2)Indicator meter was tested in different light environment,and the efficiency was evaluated by the time and accuracy of the subjects,and the influence of light environment on the efficiency was analyzed.(3)Flash fusion frequency instrument was used to test the sensitivity of subjects' eyes,which was used as an objective index to evaluate the subjects' visual fatigue,and then to study the effects of different illumination and color temperature on visual fatigue.(4)Record the VEP and its basic parameters in different light environments,and analyze the effects of different light environments on physiological EEG parameters combined with the results of subjective questionnaire,so as to evaluate the light environment by VEP parameters.