Journal of Textile Research ›› 2019, Vol. 40 ›› Issue (01): 114-119.doi: 10.13475/j.fzxb.20180305906

• Apparel Engineering • Previous Articles     Next Articles

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

WANG Min1,2, LI Jun1,2()   

  1. 1. College of Fashion and Design, Donghua University, Shanghai 200051, China
    2. Key Laboratory of Clothing Design and Technology, Ministry of Education, Donghua University, Shanghai 200051, China
  • Received:2018-03-23 Revised:2018-09-26 Online:2019-01-15 Published:2019-01-18
  • Contact: LI Jun E-mail:lijun@dhu.edu.cn

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Abstract:

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.

Key words: thermal protective, 3-D on-site scanning, flame manikin, air gap thickness

CLC Number: 

  • TS941.17

Fig.1

Construction of Microsoft Kinect device"

Fig.2

Body scanner installed in flame chamber."

Fig.3

Sensor location of the flame manikin."

Fig.4

Photos and reconstructed 3-D models of flame manikin."

Tab. 1

Average gap size and change rate before and after exposure"

重复样本 A1/mm A2/mm R/%
样本1 24.76 9.80 60.42
样本2 24.41 9.98 59.12
样本3 23.52 9.80 58.33
平均值 24.23 9.86 59.29
变异系数 2.64% 1.05% 1.78%

Fig.5

Distribution of air gap under clothing."

Tab.2

Local air gap thickness and reduction of garment before and after exposure"

传感器
编号		 样本1 样本2 样本3 变异系数/%
A1/mm A2/mm R/% A1/mm A2/mm R/% A1/mm A2 R/% A1 A2 R
B01 26.59 6.81 74.39 33.89 10.27 69.7 15.58 7.75 50.26 36.36 21.62 19.75
B02 16.44 8.79 46.53 28.66 9.65 66.33 12.71 10.85 14.63 43.30 10.60 61.37
B03 16.33 3.50 78.57 19.38 4.52 76.68 13.36 4.70 64.82 18.40 15.26 10.16
B04 23.35 3.55 84.8 17.05 5.42 68.21 7.79 5.16 33.76 48.72 21.51 41.82
B05 40.61 6.55 83.87 53.58 10.65 80.12 48.86 4.99 89.79 13.77 39.52 5.76
B06 15.59 0.42 97.31 16.13 0.55 96.59 18.39 0.42 97.72 8.89 16.20 0.59
B07 23.27 2.16 90.72 13.99 3.87 72.34 10.07 1.45 85.6 42.97 49.89 11.45
B08 25.57 2.40 90.61 46.02 4.82 89.53 35.12 3.12 91.12 28.77 36.05 0.90
B09 28.22 2.11 92.52 33.25 5.50 83.46 46.97 4.39 90.65 26.85 43.21 5.38
B10 21.58 0.42 98.05 32.11 1.82 94.33 29.61 0.48 98.38 19.81 87.30 2.32
B11 1.55 0.42 72.9 18.63 1.19 93.61 8.03 0.89 88.92 91.70 46.57 12.75
B12 41.31 0.88 97.87 36.45 2.59 92.89 38.31 2.03 94.70 6.34 47.55 2.65
B13 11.49 0.59 94.87 35.55 0.42 98.82 27.69 0.42 98.48 49.25 20.59 2.25
B14 32.15 1.90 94.09 18.87 2.67 85.85 15.10 3.28 78.28 40.64 26.43 9.19
B15 0.54 0.46 14.81 24.40 0.84 96.56 0.42 0.42 0.00 163.37 40.43 140.07
B16 7.01 0.83 88.16 3.89 1.59 59.13 4.47 1.38 69.13 32.39 30.98 20.45
B17 1.49 0.60 59.73 7.80 1.82 76.67 0.42 1.34 -219.05 123.21 49.04 -602.77
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