Limits...
Wearable wireless tactile display for virtual interactions with soft bodies.

Frediani G, Mazzei D, De Rossi DE, Carpi F - Front Bioeng Biotechnol (2014)

Bottom Line: The device was based on dielectric elastomer actuators, as high-performance electromechanically active polymers.The actuator was arranged at the user's fingertip, integrated within a plastic case, which also hosted a compact high-voltage circuitry.We present the structure of the device and a characterization of it, in terms of electromechanical response and stress relaxation.

View Article: PubMed Central - PubMed

Affiliation: School of Engineering and Material Science, Queen Mary University of London , London , UK.

ABSTRACT
We describe here a wearable, wireless, compact, and lightweight tactile display, able to mechanically stimulate the fingertip of users, so as to simulate contact with soft bodies in virtual environments. The device was based on dielectric elastomer actuators, as high-performance electromechanically active polymers. The actuator was arranged at the user's fingertip, integrated within a plastic case, which also hosted a compact high-voltage circuitry. A custom-made wireless control unit was arranged on the forearm and connected to the display via low-voltage leads. We present the structure of the device and a characterization of it, in terms of electromechanical response and stress relaxation. Furthermore, we present results of a psychophysical test aimed at assessing the ability of the system to generate different levels of force that can be perceived by users.

No MeSH data available.


Related in: MedlinePlus

Schematic drawing of the HC-DEA configuration used in this work. Lateral section of the device in the rest state (A). Lateral view of the device in an electrically induced state, due to an applied voltage difference V(B). Loading of the passive membrane of a bubble-like HC-DEA: the internal redistribution of the fluid ensures that the active membrane keeps a uniform profile, both at rest (C) and when a voltage is applied (D).
© Copyright Policy - open-access
Related In: Results  -  Collection

License
getmorefigures.php?uid=PMC4150388&req=5

Figure 1: Schematic drawing of the HC-DEA configuration used in this work. Lateral section of the device in the rest state (A). Lateral view of the device in an electrically induced state, due to an applied voltage difference V(B). Loading of the passive membrane of a bubble-like HC-DEA: the internal redistribution of the fluid ensures that the active membrane keeps a uniform profile, both at rest (C) and when a voltage is applied (D).

Mentions: When a voltage is applied to the electrodes of the active membrane, the occurring surface expansion makes it to buckle outwards, owing to its pre-curvature. This effect induces the passive membrane to follow inwards, as the fluid’s volume is constant. So, a fluid-mediated hydrostatic transmission between the two membranes is established, as presented in Figure 1.


Wearable wireless tactile display for virtual interactions with soft bodies.

Frediani G, Mazzei D, De Rossi DE, Carpi F - Front Bioeng Biotechnol (2014)

Schematic drawing of the HC-DEA configuration used in this work. Lateral section of the device in the rest state (A). Lateral view of the device in an electrically induced state, due to an applied voltage difference V(B). Loading of the passive membrane of a bubble-like HC-DEA: the internal redistribution of the fluid ensures that the active membrane keeps a uniform profile, both at rest (C) and when a voltage is applied (D).
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4150388&req=5

Figure 1: Schematic drawing of the HC-DEA configuration used in this work. Lateral section of the device in the rest state (A). Lateral view of the device in an electrically induced state, due to an applied voltage difference V(B). Loading of the passive membrane of a bubble-like HC-DEA: the internal redistribution of the fluid ensures that the active membrane keeps a uniform profile, both at rest (C) and when a voltage is applied (D).
Mentions: When a voltage is applied to the electrodes of the active membrane, the occurring surface expansion makes it to buckle outwards, owing to its pre-curvature. This effect induces the passive membrane to follow inwards, as the fluid’s volume is constant. So, a fluid-mediated hydrostatic transmission between the two membranes is established, as presented in Figure 1.

Bottom Line: The device was based on dielectric elastomer actuators, as high-performance electromechanically active polymers.The actuator was arranged at the user's fingertip, integrated within a plastic case, which also hosted a compact high-voltage circuitry.We present the structure of the device and a characterization of it, in terms of electromechanical response and stress relaxation.

View Article: PubMed Central - PubMed

Affiliation: School of Engineering and Material Science, Queen Mary University of London , London , UK.

ABSTRACT
We describe here a wearable, wireless, compact, and lightweight tactile display, able to mechanically stimulate the fingertip of users, so as to simulate contact with soft bodies in virtual environments. The device was based on dielectric elastomer actuators, as high-performance electromechanically active polymers. The actuator was arranged at the user's fingertip, integrated within a plastic case, which also hosted a compact high-voltage circuitry. A custom-made wireless control unit was arranged on the forearm and connected to the display via low-voltage leads. We present the structure of the device and a characterization of it, in terms of electromechanical response and stress relaxation. Furthermore, we present results of a psychophysical test aimed at assessing the ability of the system to generate different levels of force that can be perceived by users.

No MeSH data available.


Related in: MedlinePlus