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Full-Text Articles in Mechanical Engineering
Force And Slip Detection With Direct-Write Compliant Tactile Sensors Using Multi-Walled Carbon Nanotube/Polymer Composites, Morteza Vatani, Erik Engeberg, Jae-Won Choi
Force And Slip Detection With Direct-Write Compliant Tactile Sensors Using Multi-Walled Carbon Nanotube/Polymer Composites, Morteza Vatani, Erik Engeberg, Jae-Won Choi
Dr. Jae-Won Choi
A mechanically compliant tactile sensor has been developed through direct-write (DW) deposition of a flexible conductive nanocomposite embedded between flexible polyurethane materials. Dispersion of multi-walled carbon nanotubes (MWCNTs) in a flexible and photocurable monomer introduced electrical and piezoresistive properties to the polymer which was used for the flexible conductive nanocomposite. Dispensing experiments were performed using the developed DW system to precisely create and embed the sensor elements between polyurethane substrates. From the experimental results, several flexible sensors including highly stretchable sensor elements (wires) were fabricated. Experiments were also performed to show that the sensor could detect applied forces at distinct …
Direction Of Slip Detection For A Biomimetic Tactile Sensor, Erik Engeberg, Morteza Vatani, Jae-Won Choi
Direction Of Slip Detection For A Biomimetic Tactile Sensor, Erik Engeberg, Morteza Vatani, Jae-Won Choi
Dr. Jae-Won Choi
A biomimetic tactile sensor (BTS) is developed from strips of electrically conductive carbon nanotubes (CNTs) mixed in a polymer matrix that is embedded within a flexible polyurethane shell. The mechanical compliance of the BTS is similar to the human fingertip. Experiments are performed which show that the BTS can be used to detect slip and the direction that slip occurs by examining the relative timing among force signals from adjacent strips of CNTs and the frequency content of the force signals. The BTS can also detect forces applied at distinct points on the surface of the BTS.