西部人居环境学刊2023，Vol.38Issue(6)：54-59,6.DOI:10.13791/j.cnki.hsfwest.20230608
不同LED照度水平对设计类教室学习效率和舒适度的影响研究
Study of the Effect of Different LED Illumination Levels on Students'Learning Efficiency and Comfort in Design Classrooms
摘要
Abstract
Design classrooms have different requirements for lighting environments than traditional classrooms.Compared with traditional classrooms,students in design classrooms have more fixed seats,longer learning periods,and more diverse learning behavior patterns.This means that in design classrooms,where students are required to perform close,long-term,high-intensity visual assignment activities,the visual tasks are complex and heavily loaded,and they face a greater risk of visual fatigue.However,at present,design classrooms are still fundamentally designed based on the light environment of the average classroom,and students have low satisfaction with the design of illumination levels.This shows that the illumination level of 300 lx in ordinary classrooms cannot meet the visual requirements of students.Therefore,additional in-depth research is needed to determine the appropriate illumination level for design classrooms. To improve the learning efficiency and comfort in design classrooms,this study sets up LED lighting conditions with different illumination levels(125 lx,300 lx,500 lx,750 lx,1 000 lx)in the architecture design classroom on the 17th floor of the second comprehensive building in B District of Chongqing University,and conductes visual work experiments under different illumination levels.The experiment uses the measurement of objective physiological index,subjective psychological sensation questionnaire,visual task test and facial expression video collection,analyze the change rate of physiological index,subjective comfort evaluation,job performance and facial emotion of subjects under different illumination levels,and discusses the relationship between different illumination levels,comfort level and learning efficiency of design classrooms.The subjective psychological sensation questionnaire consists of three parts:basic information,subjective comfort evaluation,and learning status evaluation.The evaluation of subjective comfort uses the five measures of brightness,fatigue,color rendering,relaxation,and pleasure,and the self-evaluation of learning status uses seven-level Likert scale.The objective physiological indexes include blood pressure,body temperature and heart rate.The PG-800A3 is an automatic wrist blood pressure monitor that measures changes in heart rate and blood pressure,and a non-contact thermometer that measures changes in body temperature.The visual task test consists of three paper task scales:pointer recognition test,general attention test,and Stroop color-word test.The facial emotion test is performed by collecting the entire facial video data of the subject using a camera,and then using FaceReader to analyze the psychological state of the facial expression video images to capture the subject's emotional changes.Based on the completeness of the experimental data and taking into account the male-to-female ratio,data from 12 subjects is selected for analysis,including six males and six females.The experiment is conducted in March 2022 and lasted for 20 days,from 7:00 to 9:00 p.m.every day.During the experiment,try to ensure that the lighting conditions in the classroom are uniform.The illuminance is adjusted through the mobile APP,and the real-time illuminance is measured with the XYI-III full digital illumination meter to ensure the stability of the experimental illuminance.Before and after each experiment,three physiological indexes of subjects are collected.In each group of experiments,subjects need to complete the paper task scale.After the experiment,subjects fill in subjective comfort evaluation scales.Video of subjects'facial expressions is recorded throughout the experiment.The total duration of a single experiment is about 20 mins. In this study,60 valid data groups are collected.Each group of data includes physiological index change data twice,job performance data once,subjective comfort evaluation data once,and facial expression data once.By analyzing the physiological index change rate,job performance,subjective comfort evaluation and facial emotion of subjects under different illumination conditions,the results show that:the subjects'job performance is the highest under 500 lx illumination level,followed by 750 lx illumination level,and the lowest is under 125 lx illumination level;the subjects'physiological index change rate is the weakest before and after the experiment under 750 lx illumination level that means the learning state is the most relaxed,the highest rate of change in physiological indexes is at the 300lx illumination level;subjective comfort scores increase with the increasing illumination level,the highest personal evaluation score of learning state is at the 750 lx illumination level;subjects have the highest values of facial pleasure emotion at the 1 000 lx illumination level and the lowest values of facial disgust emotion at the 750 lx illumination level.Therefore,for design classrooms,750 lx is an appropriate illumination level for comprehensive learning efficiency and comfort.This study conducts a preliminary experiment on the learning status of students during paperwork and design specialty classrooms with the same orientation layout in terms of illumination changes.However,the space layout of the design classroom and the students'learning mode are diverse,and further research should be conducted from the aspects of space layout,light source illumination direction,color temperature and so on.The relevant research in this paper can provide reference for the research of design classroom light environment.关键词
LED/设计类教室/照度水平/学习效率/舒适度Key words
LED/Design Classroom/Illumination Level/Learning Efficiency/Comfort分类
建筑与水利引用本文复制引用
梁树英,杨易,王文轩,傅三超,白玉柱..不同LED照度水平对设计类教室学习效率和舒适度的影响研究[J].西部人居环境学刊,2023,38(6):54-59,6.基金项目
国家重点研发计划资助项目(2018YFC0705100) （2018YFC0705100）
国家自然科学基金项目(51708055) （51708055）
重庆大学实验室技术安全研究项目(syaq202301003) （syaq202301003）
