Research On Optimization Of Night Lighting Environment In College Classrooms Based On Visual Comfort

With the improvement of the national economy and the level of education,the number of teachers and students and the scale of education in universities have been increasing.Colleges and universities are important places to cultivate outstanding academic talents and conduct academic seminars.The lighting environment in the interior of the university building is closely related to the normal conduct and hosting of various activities on the campus.The classroom is the main place for students 'daily learning and class.The quality of the lighting will affect the students' eye health.How to provide a lighting environment that meets the visual health of students is bound to be the future development direction of classroom lighting design;how to improve the existing classroom lighting environment and establish a classroom space lighting environment that meets the needs of students' visual comfort is a question worthy of further research.First of all,this article sorts out the research on visual and non-visual aspects of classroom lighting in colleges and universities by reading a lot of literature on classroom lighting.It has been found that there is relatively little research on visual comfort in the lighting environment of college classrooms.From the perspective of students' visual comfort,it was determined that the lighting environment in the classrooms of colleges and universities was used as the research object,and 12 classrooms in the main campus of Hebei Engineering University were surveyed through a combination of field measurements and questionnaires.Explain the existing problems and deficiencies in the night lighting environment of the classroom.Based on the analysis of 600 questionnaires on the visual comfort of nighttime lighting environment in college classrooms,the lighting indicators that affect students' visual comfort in the classroom lighting space are summarized;combined with the measured data,the SPSS22.0 software is used to establish the subjective lighting environment and the subjective visual comfort of students Evaluation of multiple regression equations and regression analysis with measured data to obtain a range of illumination values that meet students' visual comfort.Secondly,subjective experiments on visual comfort of classroom lighting in colleges and universities are conducted.By investigating and analyzing the range of illuminance values combined with related theoretical research,the parameter value range of subjective experiments on visual comfort is determined.Illumination was used as the main evaluation parameter in the specially designed classroom environment.By changing the illumination value of the indoor lighting environment,the students' visual comfort and related visual fatigue and alertness were quantified by using psychological scales and visual assignment materials.Through research,the mathematical equations of visual comfort,visual fatigue,and illuminance are obtained,and the range of illuminance thresholds that satisfy students' visual comfort,are less prone to visual fatigue,and have higher alertness are obtained.Finally,optimize the lighting environment of college classrooms.A model of a college classroom was established in DIALux evo to simulate the lighting environment of the classroom.By changing the height,spacing and arrangement of the lamps,the desktop illumination value and illumination uniformity reach the illumination threshold range that meets the visual comfort of students.This paper puts forward a lighting environment optimization scheme suitable for two typical classrooms in colleges and universities.Based on the current situation that the standard classroom illumination value can not meet the students' visual needs,the recommended value range of classroom illumination standard illumination that meets the visual comfort of students is provided,which provides technical support for the design of classroom lighting environment in the future.