Abstract
Problem statement: Although a conventional tactile display can generate distributed pressure, our tactile mouse can generate not only distributed pressure but also slippage force. In previous works, this tactile mouse was effective on virtual figure presentation tests. Advanced tests are required to evaluate this tactile display. Approach: To compare virtual reality presented by the present tactile mouse and a real object, we produced an edge presentation apparatus composed of an x-y stage and two rotary stages to compare real feeling with virtual reality. In virtual edge presentation, slippage stimulus of a spike was generated in addition to step-height stimulus when a mouse cursor travels on the virtual edge. Results: In virtual edge presentation, we performed three series of experiments: distributed pressure presentation, combined presentation of distributed pressure and vertical slippage force and combined presentation of distributed pressure and parallel slippage force. In the case of the combined presentation of distributed pressure and parallel slippage force, a human subject’s judgment of edge direction was performed with the highest precision among virtual edge presentation tests. When the human subject touched the real edge orientation presented by the apparatus, the precision became higher than any case of virtual presentation. Conclusion/Recommendations: The combined presentation of distributed pressure and parallel slippage force was effective to present a virtual edge. The pressure-slippage-generating tactile mouse can enhance the degree of reality of a virtual figure.
Highlights
Virtual Reality (VR) technology and tele-existence (Tachi, 1992) have recently progressed in the research fields of telecommunication and tele-robotics
The mechanoreceptive units of human tactile organs are known as the Fast Adapting type I unit (FA I), the Fast Adapting type 2 unit (FA II), the Slowly Adapting type I unit (SA I) and the Slowly Adapting type II unit (SA II)
In a preceding study (Zhou et al, 2010), we developed a new tactile display mounted on a mouse capable of presenting distributed pressure and tangential force to stimulate the four kinds of mechanoreceptive units
Summary
Virtual Reality (VR) technology and tele-existence (Tachi, 1992) have recently progressed in the research fields of telecommunication and tele-robotics In these fields, several mechanisms have been tentatively presented for tactile displays. In a preceding study (Zhou et al, 2010), we developed a new tactile display mounted on a mouse capable of presenting distributed pressure and tangential force to stimulate the four kinds of mechanoreceptive units. We evaluated the deviation from the desired trajectory for each virtual figure to confirm the effect on the present combined stimulus. To evaluate this tactile mouse, we performed edge tracing tests for virtual circles, triangles and squares with four male subjects. The experimental results showed that presentation capability was enhanced with the combined stimulation because the edge tracing precision obtained using combined stimulation
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