HAPTIC TECHNOLOGY
(TOUCH THE VIRTUAL)
PRESENTED BY
S.CHANAKYA
MVSR Engineering college

WHAT IS HAPTICS ?
 ‘Haptics’ is derived from the Greek word ‘haptikos’
which means – ‘being able to come into contact’.
 Haptics is the science of applying touch (tactile)
sensation and control to interact with computer
applications.

 Generally computers typically only take
advantage of one or two sensory channels (sight
and sound) to transmit information to people.
 Haptics promises to open this bottleneck by
adding a new channel of communication using
the sense of touch.
 Haptics expands the notion of bidirectional
communication between humans and computers
to include sensory feedback.
 Haptics = Touch = Connection

VIRTUAL REALITY
 Virtual reality is a form of human-computer
interaction providing a virtual environment that one
can explore through direct interaction with our
senses.

THE REAL WORLD
 User should be able to touch the virtual object and
feel a response from it.
 In order to complete the imitation of the real world
one should be able to interact with the environment
and get a feedback.
 This feedback is called Haptic Feedback.

HAPTICS FEEDBACK
 Haptics is implemented through different type of
interactions with a haptic device communicating
with the computer. These interactions can be
categorized into the different types of touch
sensations a user can receive:
1)Tactile Feedback
2)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.

HAPTICS TECHNOLOGY
 Haptic technology is a tactile feedback technology
which takes advantage of the sense of touch by
applying forces, vibrations, or motions to the user.
 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.

HOW IT WORKS
4 2
3 Computer
Sensors haptics
Muscles
End effector
1
Machine
Human Hand
1
Virtual object
4 3
2
Sensors
Actuators

 Basically a haptic system consist of two parts
namely the human part and the machine part.
 In the figure shown above, the human part (left)
senses and controls the position of the hand, while
the machine part (right) exerts forces from the
hand to simulate contact with a virtual object.
 Also both the systems will be provided with
necessary sensors, processors and actuators.

 In the case of the human system, nerve receptors
performs sensing, brain performs processing and
muscles performs actuation of the motion
performed by the hand.
 While in the case of the machine system, the above
mentioned functions are performed by the
encoders, computer and motors respectively.

HAPTIC DEVICES
It allows users to touch, feel and manipulate
3-D objects in virtual environments.

HOW ARE HAPTIC DEVICES DIFFERENT?
 Common interface devices like mouse and joystick
are only input devices. No feedback.
 Haptic devices are input-output devices.

COMMONLY USED HAPTIC DEVICES

1. PHANTOM
 Provides a 3D touch to the virtual objects
 When the user move his finger, then he could
really feel the shape and size
of the virtual 3D object
that has been already
programmed

2. CYBER GRASP
 The CyberGrasp system fits over the user's entire
hand like an exoskeleton and adds resistive force
feedback to each finger
 Adapted to different size of the
fingers
 Located on the back of the
hand

3.MAGNETIC LEVITATION HAPTIC INTERFACES
 A technology for feeling
sensation over total body

APPLICATIONS OF HAPTICS TECHNOLOGY
 Computer and video
games-Haptic feedback is
commonly used in arcade
games, especially racing
video games.
Disney Research, Pittsburg
(DRP) has shown off a
revolutionary technology
called ‘Surround Haptics’ that
can bring real life experience in video
gaming and film watching.

 Personal computers-
Apple's MacBook and
MacBook Pro started
incorporating a
"Tactile Touchpad" design.
Mobile devices-
Tactile haptic feedbac
k is becoming common
in cellular devices.Nokia
and prada implemented
it using piezoelectric
sensor pads.

 Robotics-Haptic technology
is also widely used in
teleoperation, or telerobotics.
Arts and design-
Haptics is used in virtual
arts, such as sound synthesis
or graphic design and
animation

LIMITATIONS
 High cost involved
 Large weight and size of haptic devices
(especially wearable ones)
 Haptic interfaces can only exert forces with
limited magnitude and not equally well in all
directions
 haptic-rendering algorithms operate in discrete
time whereas users operate in continuous time

FUTURE VISION
1.Holographic Interaction
The feedback allows the user to interact with a
hologram and actually receive tactile response using
acoustic radiation pressure
2.Medical Application
Use of a central workstation from which surgeons
would perform operations in various locations; with
machine setup and patient preparation performed by
local nursing staff
3. Textile Industry
User could study and feel the texture and quality of
materail during the sale of cloth through internet

CONCLUSION
 The next important step towards realistically
simulated environments that have been
envisioned by science fiction authors.
 Continued implementation of tactile devices to
aid people with disabilities will advance further
 Future generations of mobile devices and game
console accessories will implement more haptic
feedback
 Still embryonic when compared to full fledged VR
simulations

THANK
YOU