
This letter introduces Tweelie: a tactile wheel-shaped sensor with soft elastomer skin based on barometric pressure transducers. Tweelie enables high impact force reconstruction and localization over a curved spherical surface. Multiple contacts occurring simultaneously can be detected and inferred over a 6457 mm2 surface. Based on the spatial distribution of 48 micro-electromechanical system (MEMS) sensors along a cylindrical surface, a graph is constructed to infer the contact state. The 3-D force localization is done by mapping the pressure readings onto an appropriate pressure distribution based on the shape of the Tweelie sensor; the 3-D force is obtained by integrating this distribution. Results show a localization error of 2∘ and regression error of less than 1 N for a single contact on rigid surface, enabling direct force localization and reconstruction for locomotion and other tactile applications.
Technology and Engineering, Micromechanical devices, Sensors, Location awareness, Tactile sensors, Physics and Astronomy, Elastomers, Sensor applications, tactile sensor, Rubber, robotic sensor, Sensor phenomena and characterization, Surface reconstruction, Robots, Force, barometric micro-electromechanical system (MEMS)
Technology and Engineering, Micromechanical devices, Sensors, Location awareness, Tactile sensors, Physics and Astronomy, Elastomers, Sensor applications, tactile sensor, Rubber, robotic sensor, Sensor phenomena and characterization, Surface reconstruction, Robots, Force, barometric micro-electromechanical system (MEMS)
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