13-01-2011, 05:29 PM
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Presented by:-
Prachi Sanghvi
CSE V Sem
Contents
Introduction
Technology
Working
Haptic devices
Applications
Advantages & Disadvantages
Conclusion
INTRODUCTION
Haptics is derived from the Greek word ‘haptikos’ which means-”being able to come into contact with”
Haptics is the technology of adding the sensation of touch and feeling to computers.
A haptic device gives people a sense of touch with computer-generated environments, so that when virtual objects are touched, they seem real and tangible.
Understanding and enabling a compelling experience of Presence not limited to "being there", but extended to "being in touch" with remote or virtual surroundings
TECHNOLOGY
Haptic interactions can be categorized into
the different types of touch sensations a user
can receive:
Tactile feedback
Force feedback
Tactile feedback
Refers to the sensations felt by the skin.
It allows the user to feel things such as the texture of surfaces, temperature and vibration.
Force feedback
It reproduces the directional forces that can result from solid boundaries.
E.g. the weight of virtual objects, inertia, etc.
Haptic Devices
By using haptic devices, the user can not only feed information to the computer but can also receive information from the computer in the form of a felt sensation on some part of the body. This is referred to as a haptic interface.
A haptic interface device has ability to provide for simultaneous information exchange between a user and a machine.
Feedback devices
Devices that allow users to "feel" textures of 2-dimensional
Objects.
The 2-dimensional haptic devices can be used to aid computer
users who are blind or visually disabled, by providing a
slight resistance at the edges of windows and buttons so
that the user can "feel" the Graphical User Interface
This technology can also provide resistance
to textures in computer images which enables computer
users to "feel“ pictures such as maps and drawings.
The WingMan Force Feedback Mouse and the iFeel mouse are
some of the two dimensional devices haptic devices produced
by Logitech.
Virtual reality/ Telerobotics based devices
It allow the user to "touch" and manipulate 3-dimensional virtual objects.
The PHANTom from SensAble Technologies is a 3-dimensional pen-style haptic interface, and comes in five models.
CyberGrasp is a glove-style haptic interface that allows users to touch computer-generated objects and experience realistic force feedbacks.
Exoskeletons
The term exoskeleton refers to the hard outer shell
large and immobile systems that the user must attach him or herself to.
their large size and immobile nature allow for the generation of large and varied force information.
Gloves and wearable devices
These devices are smaller exoskeleton-like devices
The user can move naturally without being weighed down by a large exoskeleton or immobile device
Point-sources and Specific task devices
Single point of contact
Specialized for performing a particular task.
Restricts the device to perform few functions
Locomotion Interface
Feedback is in the form of full body force Feedback. Force In a confined space, simulate unrestrained human mobility such as walking and running for virtual reality.
PHANTOM DEVICE
Haptic interfacing device Developed by sensable technologies.
Provides 3D touch : Adds a new dimension to human computer Interaction, namely
haptic interaction.
Haptic interaction uses
both the sense of touch
and movement
Programs developed for the Phantom :
Mathematical curves and surfaces ,paint with your fingers
