Conductive knitted fabric as large-strain gauge under high temperature
Conductive knitted fabric as large-strain gauge under high temperature
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DOI：
10.1016/j.sna.2005.10.026
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发表时间：
2006-01-26
影响因子：
4.6
通讯作者：
Wang, SY
中科院分区：
文献类型：
--
作者：
Zhang, H;Tao, XM;Wang, SY
研制了一种本征导电针织物基电阻应变计，用于测量高温下的面内或面外大应变。通过纬平针织物的模型，对影响传感器灵敏度的机电特性进行了理论分析。由两股纱线重叠而产生的接触电阻（Rc）是影响电阻-应变响应的关键因素，而织物结构决定了传感器的灵敏度。利用接触电阻的特性制作了两种结构，找出了影响传感器灵敏度、重复性和精度的关键因素。实验分析了应变率和温度对应变计灵敏度的影响。实验结果表明，碳纤维织物应变片因其内部摩擦小和固有的物理特性，比不锈钢织物应变片具有更高的灵敏度、重复性和准确度。管状结构的最大应变水平高于单经结构，但灵敏度低于单经结构。温度对灵敏度的影响大于应变率。(C)2005 Elsevier B. V.保留所有权利。
An intrinsically conductive knitted fabric-based electrical resistive strain gauge is developed to measure in-plane or out-of-planar large strain under high temperature. Electro-mechanical properties, which governor the sensitivity of the gauge, are analyzed theoretically by a model of weft plain fabric. The contacting electrical resistance (R-c), resulted from two overlapped yams, is attributed to be the key factor contributing to the resistance-strain response while the fabric structure determines the sensitivity of the gauge. Two structures are fabricated making use of the properties of contacting resistance to find the key factors governing the sensitivity, repeatability and accuracy of the sensors. The effects of strain-rate and temperature on the sensitivity of the gauge are analyzed experimentally. From the experimental results, fabric gauges made from carbon fibers display a higher sensitivity, repeatability and accuracy than those made by stainless steel due to its small internal friction and intrinsic physics properties. Meanwhile, tubular structure has high maximum strain level than single warp structure but exhibits lower sensitivity than the latter. Temperature exhibits greater effect on the sensitivity than the strain-rate. (C) 2005 Elsevier B.V. All rights reserved.