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中文摘要：
通过分析力敏炭黑填充导电橡胶（力敏导电炭黑/橡胶）＂负电阻-压力系数＂（NPCR）的主因,研究了基于炭黑填充导电橡胶的力传感器非线性特性。研究表明,当炭黑体积分数接近临界渗流体积分数时,NPCR非线性的主因为电阻率的非线性减小;炭黑体积分数在渗流区时,NPCR非线性的主因为电阻率的非线性减小和导电橡胶应力-应变关系的非线性;若炭黑体积分数在传导区时,NPCR非线性的主因为应力-应变关系的非线性。随着炭黑体积分数的增大,力敏导电炭黑/橡胶的NPCR非线性逐渐减弱。此外,由于界面压阻效应以及导电橡胶近似不可压缩体的性质,用于获取NPCR效应的电极分布形式也对NPCR效应的非线性特性存在影响。
英文摘要：
Nonlinear behavior of pressure-sensitive sensor based on conductive rubber filled by carbon black was analyzed by comparing the influence of resistivity and stress-strain relation on the negative pressure characteristic of resistance（NPCR）.It is concluded that if the carbon black contents are close to seepage volumes,because of resistivity nonlinear variation,the stronger nonlinearity of the NPCR is obtained.If the carbon black contents are in percolation zone,strong nonlinearity of the NPCR obtained is due to stress-strain and resistivity nonlinear variation.If the carbon black contents are in conductive zone,weak nonlinearity of the NPCR is obtained as a result of stress-strain nonlinear variation.Moreover,due to the interface piezoresistive effect and the nature of similar incompressible,distribution forms of the electrodes used to obtain the NPCR effect will affect the nonlinear behavior of NPCR effect.
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