Conductive mechanism research based on pressure-sensitive conductive composite material for flexible tactile sensing

New flexible sensitive materials research in the tactile sensor especially in the field of robot sensor has a very important role. From the perspective of macro and microscopic theory, this paper studies the conductive mechanism based on the pressure-sensitive conductive composite material of such flexible tactile sensor, through the experiment of adding conductive filled composite materials of different contents, determine the carbon black filler content of the pressure-sensitive conductive composite material in insulation zone, percolation zone and conductive zone. By utilizing the general effective media (GEM) and quantum tunnel effect theory, it explains the conductive characteristics and piezoresistive characteristics of the carbon black filled pressure-sensitive conductive composite material. It studies the influence of the temperature to conductive performance of the pressure-sensitive composite material according to the conductive mechanism of the pressure-sensitive conductive composite material, which provides theoretical foundation for researches of such new flexible tactile sensor material.