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- Title
Piezoresistive Tactile Sensor Discriminating Multidirectional Forces.
- Authors
Youngdo Jung; Duck-Gyu Lee; Jonghwa Park; Hyunhyub Ko; Hyuneui Lim
- Abstract
Flexible tactile sensors capable of detecting the magnitude and direction of the applied force together are of great interest for application in human-interactive robots, prosthetics, and bionic arms/feet. Human skin contains excellent tactile sensing elements, mechanoreceptors, which detect their assigned tactile stimuli and transduce them into electrical signals. The transduced signals are transmitted through separated nerve fibers to the central nerve system without complicated signal processing. Inspired by the function and organization of human skin, we present a piezoresistive type tactile sensor capable of discriminating the direction and magnitude of stimulations without further signal processing. Our tactile sensor is based on a flexible core and four sidewall structures of elastomer, where highly sensitive interlocking piezoresistive type sensing elements are embedded. We demonstrate the discriminating normal pressure and shear force simultaneously without interference between the applied forces. The developed sensor can detect down to 128 Pa in normal pressure and 0.08 N in shear force, respectively. The developed sensor can be applied in the prosthetic arms requiring the restoration of tactile sensation to discriminate the feeling of normal and shear force like human skin.
- Subjects
PIEZORESISTIVE devices; TACTILE sensors; HUMAN-machine systems; PROSTHETICS; MECHANORECEPTORS
- Publication
Sensors (14248220), 2015, Vol 15, Issue 10, p25463
- ISSN
1424-8220
- Publication type
Article
- DOI
10.3390/s151025463