【作者】 何伟；

【导师】 杨春宇；

【作者基本信息】 重庆大学 ， 建筑技术科学， 2022， 博士

【摘要】 多媒体教室空间是学生长时间进行脑力活动的场所,照明环境对学生的学习活动和健康起着至关重要的作用,除了满足学生视觉功效需求以外,还应充分考虑多媒体教室空间照明环境的光生物安全和光照对学生生理效应的影响,提供舒适、安全和健康的照明环境。论文以多媒体教室的照明环境为研究对象,采用客观定量实验方法,对多媒体教室LED照明的光生物安全进行充分研究,以学生的主观警觉性和专注度、脑力工作能力、脑疲劳负荷和日间嗜睡程度为实验指标,采用照度(300lx、1000lx和2000lx)和照明色温(4000K、5000K和6500K)参数变量研究了多媒体教室不同照明条件对学生生理指标的影响。通过建立照明剂量与效应的函数模型对多媒体教室的照明环境进行评价和应用研究,根据多媒体教室特征提出了综合考虑视觉和非视觉效应的健康照明参数和多媒体教室照明环境的优化策略。论文是国家自然科学基金资助项目“基于光气候分区的高校室内照明与大学生抑郁情绪的光生物效应研究”和科技部“十三五”重点研发计划资助项目“基于非视觉效应的动态光环境设计关键技术研究”的主要内容之一,研究成果对多媒体教室健康照明环境的关键技术研究和应用具有重要价值。论文的主要研究内容包括:(1)对多媒体教室照明的基本情况、光环境分布特征、学生行为特征和主观评价进行调查研究,分析多媒体教室照明环境存在的现实问题;(2)设置实验对不同照明条件下多媒体教室空间照明和显示终端的光谱分布进行测量,根据实际使用情况对多媒体教室照明环境的光生物安全进行评价;(3)在光生物安全研究的基础上进行照明参数实验研究,以主观警觉性、注意力集中度、脑力工作能力、脑疲劳负荷和日间嗜睡程度为指标,设置实验定量研究多媒体教室不同照明条件对各指标的影响作用;(4)基于光生物效应光辐射计量系统建立多媒体教室光辐射照度计算方法,根据关键技术指标的贡献权重建立多媒体教室综合评价模型,对多媒体教室照明环境进行综合评价;(5)对多媒体教室空间健康照明实际应用的关键技术进行研究,基于以人为本的健康照明需求,提出适宜多媒体教室空间的健康照明实践应用的关键参数和设计策略。论文主要得到了以下结论:(1)多媒体教室空间人眼睛实际接收到的光谱辐射强度远远低于光源直接辐射的强度,正常使用情况下多媒体教室空间常用的LED照明和显示终端的蓝光辐射在安全限值内,规范无需过度限制教室空间LED照明的色温。得到了不同照明条件对多媒体教室健康照明关键指标影响的变化特征和规律。提高照度和照明色温可以提高学生警觉性和专注度,减少日间嗜睡,但也增加了脑疲劳负荷程度,脑力工作能力随着色温的升高先得到提高后降低。(3)得出多媒体教室照明综合评价结果,在常用的300lx～500lx照度水平下,4000K照明的综合评价较低,5000K色温具有更好的综合效应,多媒体教室应适当提高照度和色温来满足健康照明环境的需求。(4)得出多媒体教室非视觉等效照度值为300lx时具有最好的综合效应,对应的常用建筑照明色温和照度参数建议值分别为4000K和1500lx～2000lx,5000K和1000lx～1500lx,6500K和500lx～750lx。(5)提出适宜多媒体教室健康照明应用的设计策略,根据多媒体教室光谱分布特征和健康光环境需求,提出了最前排课桌前沿与电子显示屏的水平距离应不小于2.7m。论文为多媒体教室建设以人为本的健康照明环境提供了基础数据和具体参数,对于解决多媒体教室空间健康环境的重大需求具有现实意义。研究成果对多媒体教室健康照明环境的关键技术研究和应用具有重要价值,为其他类型建筑空间健康光环境的研究和评价标准具有重要参考意义。论文主要在以下方面实现了创新:(1)论文根据多媒体教室空间光分布特征和学生行为特性通过实验研究了不同照度、色温和照明距离条件下的蓝光加权辐射强度,建立多媒体教室空间LED照明蓝光辐射强度模型,对不同照明条件的蓝光危害进行评价,提出了多媒体教室空间照明灯具与人眼距离下的照度限值。(2)论文在光生物安全的基础上通过实验定量研究了多媒体教室照明环境对学生日间警觉性、注意力集中度、脑疲劳和日间嗜睡等生理指标的影响,提出了多媒体教室照明综合评价指数和评价模型。(3)论文根据多媒体教室照明光环境分布特征和学生行为特性,提出了适宜多媒体教室健康照明的具体参数和空间优化的设计策略。更多还原

【Abstract】 Multimedia classroom is a place where students engage in mental activities for a long time.The lighting environment plays a vital role in the students’ learning activities and health.In addition to meeting the needs of visual effects,the photobiological safety of the lighting environment in the multimedia classroom space should also be fully considered.and non-visual effects,providing a comfortable,safe and healthy lighting environment.The thesis takes the lighting environment of the multimedia classroom as the research object,adopts the objective quantitative experimental method,and based on the research on the biosafety of lighting in the multimedia classroom,the students’ subjective alertness and concentration,mental work ability,brain fatigue load and daytime The degree of sleepiness is the experimental index.The parameter variables of illuminance(300lx,1000 lx and 2000lx)and lighting color temperature(4000K,5000 K and 6500K)are used to study the influence of different lighting conditions on non-visual effects in multimedia classrooms.The function model is used to evaluate and apply the lighting environment of multimedia classrooms,and propose healthy lighting parameters and lighting environment space optimization strategies that comprehensively consider vision,photobiological safety and non-visual effects in multimedia classrooms.The thesis is one of the main contents of the "Thirteenth Five-Year" key R&D plan funded by the Ministry of Science and Technology,"Research on Key Technologies of Dynamic Light Environment Design Based on Non-Visual Effects".The research results provide basic data and specific parameter suggestions for the key technology research and application of healthy lighting environment in multimedia classrooms.The main research contents of the paper include:(1)Investigate and study the basic lighting conditions,light environment distribution characteristics,student behavior characteristics and subjective evaluation of the multimedia classroom space,and analyze the practical problems existing in the multimedia classroom lighting environment;(2)Set up experiments to test the multimedia classroom space lighting under different lighting conditions.Measure the spectral distribution of the display terminal and the display terminal,and evaluate the photobiological safety of the multimedia classroom lighting environment according to the actual use;(3)Using intensity,mental work ability,brain fatigue load and daytime sleepiness as indicators,experiments were set up to quantitatively study the influence of different lighting conditions in multimedia classrooms on each indicator;(4)Based on photobiological effect optical radiation measurement system,the optical radiation illuminance of multimedia classrooms was established.According to the calculation method,a comprehensive evaluation model of multimedia classrooms is established according to the contribution weights of key technical indicators,and a comprehensive evaluation of the lighting environment of multimedia classrooms is carried out.(5)The key parameters and design strategies for the practical application of healthy lighting suitable for multimedia classroom spaces are proposed.The paper mainly draws the following conclusions:(1)The spectral radiation intensity actually received by human eyes in the multimedia classroom space is far lower than the direct radiation intensity of the light source.Under normal use conditions,the blue light radiation of LED lighting and display terminals commonly used in the multimedia classroom space is within the safety limit.(2)The changing characteristics and rules of the influence of different lighting conditions on students’ non-visual effect indicators were obtained.Relatively higher color temperature can improve students’ alertness and concentration,and reduce daytime sleepiness,but high color temperature lighting also increases the degree of brain fatigue,and the ability of mental work increases first and then decreases with the increase of color temperature.(3)Obtain the comprehensive evaluation results of multimedia classroom lighting.Under the commonly used illumination level of 300lx～500lx,the comprehensive evaluation of 4000 K lighting is lower,and the color temperature of 5000 K has a better comprehensive effect.The multimedia classroom should appropriately increase the illumination and color temperature to meet the healthy lighting environment.demand.(4)It is concluded that when the non-visual equivalent illuminance value of multimedia classroom is 300 lx,it has the best comprehensive effect,and the corresponding recommended values of common architectural lighting color temperature and illuminance parameters are 4000 K and 1500 lx ～2000lx,5000 K and 1000lx～1500lx,6500 K and 500lx～ 750 lx.(5)Propose a design strategy suitable for the application of healthy lighting in multimedia classrooms.According to the spectral distribution characteristics of multimedia classrooms and the requirements of healthy light environment,it is proposed that the horizontal distance between the front of the front row of desks and the electronic display screen should not be less than 2.7m.This paper provides basic data and specific parameters for the construction of a people-oriented healthy lighting environment in multimedia classrooms,and has practical significance for solving the major needs of multimedia classroom space healthy environment.The research results are of great value to the research and application of key technologies for healthy lighting environment in multimedia classrooms,and have important reference significance for the research and evaluation standards of healthy lighting environment in other types of building spaces.The paper mainly achieves innovation in the following aspects:(1)According to the spatial light distribution characteristics and student behavior characteristics of multimedia classrooms,the paper studies the blue light weighted radiation intensity under different illumination,color temperature and lighting distance conditions through experiments,and establishes a blue light radiation intensity model of LED lighting in multimedia classroom spaces.The evaluation was carried out,and the illuminance limit value under the distance between the multimedia classroom space lighting fixture and the human eye was proposed.(2)On the basis of photobiological safety,the paper quantitatively studies the influence of multimedia classroom lighting environment on physiological indicators such as daytime alertness,concentration,brain fatigue and daytime sleepiness of students through experiments,and proposes a comprehensive evaluation index of multimedia classroom lighting.and evaluation models.(3)According to the distribution characteristics of lighting environment in multimedia classrooms and the characteristics of students’ behavior,the paper proposes specific parameters and space optimization design strategies suitable for healthy lighting in multimedia classrooms.更多还原