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.Index Terms -Conductive mechanism, conductive rubber, piezoresistive effects, tactile sensing
A method of measure the information of three-dimensional force tactile sensing based on flexible pressure sensitive conductive rubber has been presented. The conductive mechanism and piezoresistivity of flexible pressure sensitive conductive rubber ware analyzed. A new type three dimensional force net array structure of flexible tactile sensor of robot sensitive skin has been designed. The mechanics model of the three-dimensional force has been found. Through experimental study the three-dimensional force based on the tactile sensor units, the change output resistances of pressure sensitive conductive rubber of sensor array unit have been obtained under action of three dimensional forces. All which provided the effective basis for the confirmation experiment result and the new structural design. The results show that pressure-sensitive conductive rubber with fine electrical and mechanical properties for flexible tactile sensors. The robot sensitive skin using this material feels like the skin of human being and measure the information of multidimensional force.
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