Game Development Reference
In-Depth Information
Tactile feedback interfaces
Mohamed Benali-Koudja, Moustapha Hafez
Contributor: Philippe Fuchs
10.1 INTRODUCTION
The tactile sense is used to characterise the perception and percepts related to touch.
Contact, local form, roughness, texture and chemical and thermal exchanges are the
associated group of variables. Until today, tactile restoration has sparked very little
interest in teleoperation. Actually, most of the robotic teleoperation applications did
not require such a degree of sharpness. In any case, it was necessary to wait for the
concepts of telesymbiotics, telepresence and tele-existence in order to focus and ponder
upon the tactilemodality. Actually, these cases concern anthropomorphic robotic slaves
or concepts that aim towards “teleporting'' the sensory man to distant places. The
appeal of these innovative concepts was brief in view of the complexity of the task and
for other reasons as well. In particular, devices like marine robots, air robots (drones)
or land robots that do not require a pilot, have superseded the anthropomorphic
robots for reasons that we shall not spend time explaining. Devices that are capable
of relaying tactile information have occupied only a secondary position in relation to
the force information.
However, tactile devices have always occupied an important place in sensory sub-
stitution (Bach-y-Rita, 1987) (even in teleoperation when the transmission delays made
it necessary to reconsider force feedbacks). The concept of “static'' Braille was really
reconsidered for the visually handicapped with the development of electronic Braille,
which is dynamic, more sophisticated and above all better adapted to the use of com-
puters. In parallel, the technologies developed helped to design tactile rendering proto-
types to restore the tactile information of a synthesis environment. Until today, while
force feedback devices have started penetrating the market, the same does not hold true
for tactile feedback devices. What is worse is that they have been dissociated from force
feedback devices in view of the force rendering complexity that they present, while in
humans the two methods can only be dissociated with difficulty, both from the phys-
iological point of view and from the point of view of haptic percepts and perception.
The new technologies developed in the context of microsystems suggest a real
opportunity to again undertake the challenge of designing a device capable of restoring
tactile information in its entirety. The complexity of such an undertaking is quite easy
to understand: it involves designing a device that can reproduce the characteristics and
forms of any surface and any material. All in all, a kind of “universal surface''. Having
said this, we are only in the initial stage of research and still far away from the goal!
 
 
Search Nedrilad ::




Custom Search