燃烧假人衣下空气层的三维现场扫描测量与表征  

Three-dimensional on-site scanning measurement and characterization of air gap entrapped between flame manikin and clothing

作　　者：王敏[1,2] 李俊[1,2] WANG Min;LI Jun(College of Fashion and Design,Donghua University,Shanghai 200051,China;Key Laboratory of Clothing Design and Technology,Ministry of Education,Donghua University,Shanghai 200051,China)

机构地区：[1]东华大学服装与艺术设计学院,上海200051 [2]东华大学现代服装设计与技术教育部重点实验室,上海200051

出　　处：《纺织学报》2019年第1期114-119,共6页Journal of Textile Research

基　　金：中央高校基本科研业务费专项资金资助项目(2232017D-24/2232018G-08);国家自然科学基金面上项目(51576038);上海市自然科学基金资助项目(17ZR1400500)

摘　　要：为准确获取燃烧假人测试中防火服热暴露前后衣下空气层厚度及其分布,提出一种基于三维现场扫描的测量和表征方法。利用Kinect深度相机,通过在燃烧假人室内构建扫描平台,现场获得假人裸体及着装状态点云数据;基于Geomagic逆向工程软件进行三维建模、对齐和比较,并通过实现假人表面传感器在三维空间的准确定位,快速有效地表征衣下空气层厚度及分布。经验证发现:即使是相同的服装每次穿着后衣下空气层分布也存在较大差异;背部区域热暴露前后空气层厚度平均变异系数分别达到46%、35%。结果表明,以往异地扫描获得的数据难以准确反映燃烧测试时的真实状态,现场扫描更有利于准确分析因服装材料、规格、高温收缩等因素导致的衣下空气层变化对热防护性能的影响。In order to accurately acquir the air gap thickness and distribution of fireproof clothing before and after heat exposure in the flame manikin test,a measurement and characterization method based on three-dimensional(3-D)on-site scanning was proposed.Firstly,by using Kinect depth cameras,a 3-D scanning platform was established in the combustion chamber,based on which the 3-D point cloud data of the nude manikin and clothed manikin before and after exposure was obtained directly.Then by modeling,alignment,and 3-D comparison in the reverse engineering software Geomagic,and with the realization of accurate location of the manikin surface sensors in the 3-D space,the air gap thickness and distribution were extracted quickly and effectively.The verification test results show that even for the same clothes,the distribution of air gaps under clothing is quite different each time.The variation coefficients of the gap thickness at the back before and after exposure even reach 46%and 35%,respectively.This indicates that the data obtained from the previous remote scanning method an not fully reflect the real state in the combustion test,and the on-site scanning is more conducive to accurately analyze the influence of air thickness change caused by clothing material,specifications,thermal shrinkage and other factors on the thermal protective performance.

关 键 词：热防护 三维现场扫描 燃烧假人 衣下空气层厚度 

分 类 号：TS941.17[轻工技术与工程—服装设计与工程]