Journal of Textile Research ›› 2019, Vol. 40 ›› Issue (07): 138-144.doi: 10.13475/j.fzxb.20180804107

• Apparel Engineering • Previous Articles     Next Articles

Preparation of pressure distribution monitoring socks and related sensing properties

LI Siming, WU Guanzheng, HU Yujie, FANG Meiqi, HE Luxiang, HE Yan, XIAO Xueliang()   

  1. Key Laboratory of Eco-Textiles(Jiangnan University), Ministry of Education, Wuxi, Jiangsu 214122, China
  • Received:2018-08-14 Revised:2019-04-13 Online:2019-07-15 Published:2019-07-25
  • Contact: XIAO Xueliang E-mail:xiao_xueliang@jiangnan.edu.cn

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Abstract:

In order to investigate the electrical conductivity and application of the weft knitted flexible sensor, the viscose conductive fiber and nylon fiber with 20% stainless steel particle content were adopted to prepare one-piece pressure distribution monitoring socks comprising three integrated pressure sensing modules and three knitting wires. The resistance change of the pressure sensing part in the surface of the socks was tested by the self-built pressure and resistance synchronous recorder. The relationship between the stress and the resistance of the pressure sensing part and the stability and reliability of the repeated compression resistance were studied. The results show that the stress and resistance of different pressure sensing parts are inversely proportional. In the case of increased stress, the resistance and sensitivity values of the knitting pressure sensor are reduced. In different stress cycles, the sensor has good curve characteristics. The sensor exhibits good stability and repeatability under a stress cycle of 35 kPa.

Key words: pressure distribution monitoring socks, flexible transducer, sensing property, intelligent textiles

CLC Number: 

  • TS184.1

Fig.1

SEM images of conductive filaments (a) and cross section of single conductive viscose fiber (b)"

Fig.2

EDX image of elemental analysis of conductive fibers"

Fig.3

One-piece pressure distribution monitoring socks based on weft stitch technology. (a) Obverse side; (b) Reverse side"

Fig.4

Weave structure of knitted flexible pressure sensing fabric. (a) Obverse side of knitted structure; (b) Reverse side of knitted structure"

Tab.1

Initial surface resistance of different positions of pressure socks"

测量部位 面电阻/(MΩ·m-2)
部位1 10.8
部位2 2.5
部位3 10.2

Fig.5

Mechanism of pressure change of intertexture pressure sensor under pressure"

Fig.6

Relationship between stress and resistance of different positions of pressure socks. (a) Part 1; (b) Part 2; (c) Part 3"

Tab.2

Sensitivity of different parts of sensors under different stresses"

应力/kPa 灵敏度/kPa-1
部位1 部位2 部位3
0.0 0.192 0.198 0.177
3.3 0.119 0.134 0.124
6.6 0.031 0.043 0.051
9.9 0.019 0.011 0.021
13.2 0.018 0.006 0.008
16.5 0.009 0.004 0.003
33.0 0.001 0.001 0.001
49.5 0 0 0

Fig.7

Hysteresis curve of pressure sensor module in pressure socks. (a) Part 1; (b) Part 2; (c) Part 3"

Fig.8

Performance test results of part 2 sensing part in pressure socks. (a) Resistance curves under different stresses; (b) Repeatability curve chart"

Tab.3

Instantaneous pressure at various parts of static feet"

脚底位置 压力/kPa
足眼 第1跖骨 第5跖骨
左脚 11 29 23
右脚 15 34 22

Fig.9

Pressure distribution monitoring change chart of walking resistance of pressure sensor module in socks. (a) Part 1; (b) Part 2; (c) Part 3"

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