基于炭黑填充导电橡胶的压力/温度传感器非线性特性

刘平; 黄英; 蔡文婷; 刘秀梅; 李锐琦; 王大月

基于炭黑填充导电橡胶的压力/温度传感器非线性特性

刘平^1,2,
黄英^2,3,,
蔡文婷³,
刘秀梅³,
李锐琦³,
王大月³

1.
中国科学技术大学自动化系, 合肥 230027;
2.
中国科学院合肥智能机械研究所, 合肥 230031;
3.
合肥工业大学电子科学与应用物理学院, 合肥 230009

基金项目: 国家自然科学基金(61072032, 60672024);国家高技术研究发展计划(2007AA04Z220)

详细信息

中图分类号: TB332;TP212
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出版历程
- 收稿日期: 2012-09-18
- 修回日期: 2013-01-10
- 刊出日期: 2013-10-14

Nonlinear characteristic of pressure/temperature sensor based on conductive rubber filled by carbon black

1.
Department of Automation, University of Science and Technology of China, Hefei 230027, China;
2.
Institute of Intelligent Machines, Chinese Academy of Sciences, Hefei 230031, China;
3.
School of Electronic Science & Applied Physics, Hefei University of Technology, Hefei 230009, China

More Information

Corresponding author:
HUANG Ying: 黄英, 博士, 教授, 主要从事敏感材料和传感技术研究 E-mail: hf.hy@163.com

摘要

摘要: 通过研究电阻率和电阻几何系数对"负电阻-压力系数"(NPCR)和"正电阻-温度系数"(PTCR)的影响,分析了炭黑填充导电橡胶(导电炭黑/橡胶)的压力/温度传感器的非线性特性。结果表明: 导电炭黑/橡胶的NPCR和PTCR效应产生非线性的主要原因为电阻率的非线性变化; 当炭黑体积分数接近渗流体积分数时,其电阻率对体积的变化敏感程度高,此时,导电炭黑/橡胶的NPCR和PTCR效应的非线性特性较强; 由于导电炭黑/橡胶的体压缩系数大于其热膨胀系数,且导电炭黑/橡胶在压力场和温度场下的形变过程不同,导电炭黑/橡胶NPCR效应的非线性强于PTCR效应的非线性。
- 复合材料 /
- 非线性 /
- 压力 /
- 温度 /
- 炭黑 /
- 导电橡胶 /
- 柔性触觉传感器
Abstract: The nonlinear characteristic of the conductive rubber filled by carbon black used for pressure/temperature sensor was analyzed by the impact of the strain and resistivity on the negative pressure coefficient of resistance(NPCR) and the positive temperature coefficient of resistance(PTCR). It concludes that nonlinear change of resistivity has a great impact on the nonlinear characteristic of NPCR and PTCR. When the volume fraction of carbon black is close to the critical volume fraction, the resistivity is highly sensitive to the change of the volume of composite, and the nonlinear characteristic of NPCR and PTCR is strong. Because the compression coefficient is larger than the expansion coefficient and the deformation process of conductive barbon black/rubber under pressure and temperature is different, the nonlinear characteristic of NPCR is stronger than PTCR.
- composites /
- nonlinear /
- pressure /
- temperature /
- carbon black /
- conductive rubber /
- flexible tactile sensor