街道步行环境夜间安全感关键影响因素识别——基于可穿戴生理传感器的感知实验  

Identification of Key Influences on the Perception of Safety at Night in Street Walking Environment:Walking Perception Experiments Based on Wearable Physiological Sensors

作　　者：朱萌[1,2] 王灿祥[2] 陈锦富 ZHU Meng;WANG Canxiang;CHEN Jinfu

机构地区：[1]华中科技大学建筑与城市规划学院、湖北省城镇化工程技术研究中心,武汉430074 [2]安徽农业大学林学与园林学院,合肥230036 [3]华中科技大学建筑与城市规划学院,武汉430074

出　　处：《中国园林》2023年第6期64-69,共6页Chinese Landscape Architecture

摘　　要：找出影响街道步行环境夜间安全感的关键因素是提升街道夜间活力的重要前提,确定采用基于生理传感器的现场感知实验方法对关键影响因素进行识别。首先结合相关理论与街道环境整体特征,建立环境自变量;再以可穿戴传感器收集的皮肤电反应(GSR)为安全感测度基础,通过“唤醒-效价”模型得出被试安全感因变量;而后建立夜间安全感的可视化地图,从地图中选取产生不同安全感的环境样本,并以最优子集回归的方法建立识别模型。基于45名被试的现场感知实验结果表明,对夜间安全感产生影响的环境因素可以分为关键影响、非关键影响与无影响因素。而本次实验得到的关键影响因素为建筑内透光、绿视率和街道界面透明度,证明了夜间街道中“自然监视”策略的重要性,同时给出基于提升“自然监视”的街道夜景设计策略。Finding out the key factors affecting the night safety of street walking environment is an important prerequisite for improving the night vitality of street.The key influencing factors is determined by field perception experiment based on physiological sensors.Firstly,combined with the relevant theory and the overall characteristics of street environment,the environmental independent variables are established.Secondly,the skin electrical response(GSR)collected by the wearable sensor is used as the basis of safety measurement.Then,through the"arousal-valence"model,the dependent variable of the subject's sense of security is obtained.Finally,a night security visualization map is established,and environmental samples with different security are selected from the map.The optimal subset regression method is used to establish the recognition model.The results of field perception experiments on 45 subjects showed that the environmental factors affecting night safety could be divided into key influencing factors,nonkey influencing factors and non-influencing factors.However,the key influencing factors obtained in this experiment are the light transmission intensity of building,the greening view and the transparency of street facade,which proves the importance of nighttime street natural monitoring strategies and gives street nightscape design strategies based on"natural monitoring".

关 键 词：风景园林 街道步行环境 夜间安全感 感知实验 环境影响因素 皮肤电反应 可穿戴设备 

分 类 号：TU986[建筑科学—城市规划与设计]