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A mobile haptic interface (MHI), a force-feedback haptic interface with a mobile base, allows to render very large virtual objects in a safe and portable manner. In this paper, we present a novel MHI system, featured with: 1) extended horizontal workspace using a omni-directional mobile base, 2) extended vertical workspace using a linear lift, 3) high-accuracy estimation of the position of the haptic...
A mobile haptic interface (MHI) refers to a system where a grounded force-feedback haptic interface is mounted onto a mobile robot to provide the user with unlimited workspace, especially for large virtual environments. In MHI, the mobile base needs to quickly change the movement direction, thus a omni-directional robot is preferred. In this paper, we present a novel omni-directional mobile robot...
We report mechanical impedance of the hand for sinusoidal stimulation at the threshold and suprathreshold levels in the frequency range of 10-500 Hz delivered through a ball-shaped interface. The participants held the ball mounted on a minishaker in a way similar to that of holding a ball interface of a force-feedback device. A minishaker excited the ball in the vertical direction, resulting in vibrations...
We report position and force detection thresholds for sinusoidal waveforms in the frequency range 10-500 Hz delivered through a stylus. The participants were required to hold the stylus in a way similar to that of holding the stylus of a force-feedback device. A minishaker moved the stylus along its length so that the majority of vibrations were presented tangentially to the skin of the hand. The...
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