织边结构弹性传感机织带的制备及其传感性能影响因素

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doi:10.13475/j.fzxb.20230206501

摘要：

为探究弹性传感机织带经向及其织边发生应变时织带电阻信号的变化规律,利用锁边工艺,将镀银锦纶导电纱线作为锁边纱,二烯类弹性纤维作为弹力经纱织造弹性机织带。通过改变弹力经纱线密度、根数和上机纬密,织造了27种不同规格的弹性传感机织带,分析各因素对织带传感性能的影响,并选用传感性能最好的一款织带制作成肩颈矫形带,监测人体姿势性驼背角度变化,以验证所制备弹性织带的传感效果。试验结果显示,基于锁边工艺制备的弹性传感织带的传感特征曲线呈增长趋势,线性特征较理想,灵敏度高,性能稳定,上机纬密和弹力经纱线密度这2个因素对于传感性能有更显著的影响。同时人体姿态变化模拟试验结果也表明,织带应变的电阻值变化能够反映人体胸椎与颈椎间的偏离角度,发挥稳定的传感作用。

关键词: 传感纺织品, 锁边结构, 机织工艺, 弹力织物, 传感性能, 灵敏度

Abstract:

Objective Current research mainly focuses on monitoring human physiological signals or fingers movements that can cause a certain strain under low stress. However, shoulder and neck movement require high stress to cause small strain, which is difficult to be monitored using knitted sensing fabrics. Therefore, the study aimed to develop elastic sensing woven webbing, to investigate its design and fabrication method, and to explore the sensing properties and the application feasibility through corresponding human wearing test.

Method The conductive yarns were used as selvage yarns in elastic web weaving process. Effects of on-machine weft density, elastic yarn fineness and the number of conductive yarns on sensing properties were explored. Three levels of each factor created 27 treatment combinations, leading to 27 elastic woven webbing samples with different tensile properties. The resistances in a certain length of the webbing samples were measured when the elastic webbings were stretched to the same strain. The resistance-strain curve was developed, presenting the sensing curve. Linearity and reproducibility of the sensing property were analyzed after repeated tests. Also, the corresponding equivalent resistance calculation formula was obtained so that to examine the selvedge structure and the sensing mechanism caused by conductive yarns. Finally, the elastic webbing with the best performance was applied in a wearing experiment of human postural hunchback angle monitoring to verify the stability and application possibility of the sensing webbing.

Results The sensing curves of elastic sensing woven webbing demonstrated an increasing trend with ideal linear feature, with high corresponding sensitivity and stable repeatability. The special selvage structure of the elastic woven webbing was found to play an important role in sensing properties. Increasing the on-machine weft density, fineness of elastic yarn, or the number of elastic yarns in the locked selvage enhanced the sensitivity of the sensing elastic webbing. In addition, the human wearing test further verified that the sensing performance of this elastic sensing woven webbing was stable and applicable to monitor human shoulder and neck motion.

Conclusion The study was undertaken to analyze the sensing property and sensing mechanism of the elastic webbing with conductive selvage yarns. The weft density, the fineness and the number of elastic yarns have significant effects on the sensing performance. The corresponding equivalent resistance calculation formula obtained is helpful to analyze the corresponding varying trend of each equivalent resistance unit under the strain. Findings in the study provide an ideal way to monitor human movements with high stress and small strain.

Key words: sensing textile, selvedge structure, weaving process, elastic fabric, sensing property, sensitivity

中图分类号:

TS101.8

史雅楠, 马颜雪, 樊平, 薛文良, 李毓陵. 织边结构弹性传感机织带的制备及其传感性能影响因素[J]. 纺织学报, 2024, 45(11): 114-120.

SHI Ya'nan, MA Yanxue, FAN Ping, XUE Wenliang, LI Yuling. Preparation of weaving edge structure flexible sensor woven webbing and analysis of influencing factors on sensing performance[J]. Journal of Textile Research, 2024, 45(11): 114-120.

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链接本文: http://www.fzxb.org.cn/CN/10.13475/j.fzxb.20230206501

http://www.fzxb.org.cn/CN/Y2024/V45/I11/114

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水平	A	B	C
水平	上机纬密/ (根·cm^-1)	弹力经纱线密度/tex	织边弹力经纱根数
1	14	325	6
2	12	250	5
3	10	200	4

影响因素	各因素水平	电阻值/Ω
上机纬密/(根·cm^-1)	14	100.47
	12	111.93
	10	121.47
弹力经纱线密度/tex	325	98.72
	250	111.87
	200	123.28
织边弹力经纱根数	6	102.71
	5	111.77
	4	119.39

影响因素	各因素水平	线性度
上机纬密/(根·cm^-1)	14	0.043
	12	0.035
	10	0.033
弹力经纱线密度/tex	325	0.038
	250	0.041
	200	0.033
织边弹力纱根数	6	0.042
	5	0.035
	4	0.035