haptic technology -jyot virk

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A SEMINAR REPORT ON
“HAPTIC TECHNOLOGY”
SUBMITTED IN PARTIAL FULFILLMENT FOR THE
DEGREE OF BACHELOR OF TECHNOLOGY IN
“Computer science”
BY
“JUDGE SINGH”
CSE
12BCS8062

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OUTLINE
What is haptic technology?
Working.
Architecture.
Characteristic.
Application.
Advantages.

3. WHAT IS HAPTIC TECHNOLOGY?
 Haptic technology, or haptics, is a tactile feedback
technology that takes advantage of a user’s sense of
touch by applying forces, vibration and motions to the
user.
 It has been described as “(doing) for the sense of touch
what computer graphics does for vision”.
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4. What haptic provides us?
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Improved Usability
Enhanced Realism
Restoration of Mechanical Feel

5. Haptic interaction loop with user and
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Virtual Environment
Human hand haptic virtual
device environment

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WORKING
BASIC BLOCK DIAGRAM OF HAPTIC ENVIORMENT

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The above diagram consist of :-
Simulation engine.
 Visual, auditory, and haptic rendering algorithms
Transducers.
Rendering.

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HAPTIC ARCHITECTURE
.

9.  The haptic rendering is divided into three main
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blocks :-
Collision-detection algorithm detects collision between objects
and avatars in the virtual environment and yield information.
Force-response algorithms computes the interaction between the
virtual objects and avatars when a collision is detected.
Control algorithms command the haptic device in such a way that
minimizes the error between ideal and applicable forces.

10. DESIGNING FACTORS
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Criteria For Designing Haptic Control
System.
a. Free space must feel free
b. Solid virtual objects must feel stiff
c. Virtual constraints must not be easily saturated.

11. Haptic Device Control System
There are three control system to control haptic
devices:-
1. Impedance control system -"displacement in -force out".
2. Admittance control system-"force in - displacement out".
3. Hybrid control system.
4. Adaptive control system.
5. Robust control system.
6. Optimal control system.
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12. Several Guidelines For Designing Haptic And
Tactile Feedback For Directed Movements:-
• Maintain stimulus-response compatibility.
• In normal viewing conditions, extra-visual feedback may not
improve targeting performance.
• The effects of feedback in multiple-target environments are
not well understood.
• The effects of feedback in multiple-target environments are
not well understood.
• Buttons on tangible objects can interfere with positioning.
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CHARACTERISTICS
1) Types Of Information Received
a) Tactile information- information acquired through
sensors in the skin .
b) Kinesthetic information-information acquired through
the sensors in the joints.
2) Types Of Forces
a) Forces due to object geometry.
b) Forces due to object surface properties, such
as texture and friction.

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3)Types of Haptic devices:
a) Devices that allow users to touch and
manipulate 3-dimentional virtual object.
b) Devices that allow users to "feel" texture
of 2-dimension objects.

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HAPTIC DEVICE
 To aid computer users who are blind or
visually disabled or are tactile leaners.
It provides resistance to texture in computer
images.
It provides single point,3D force-feedback
to the user via stylus attached to a moveable
arm
1)
2)

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3)
4)
Cyber glove can sense th position and
movement of fingers and wrist.
It can be used to manipulate virtual
objects.
It is worn over Cyber Glove.
Exerts palpable forces on the real hand,
creating illusion of touching.

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APPLICATION
FOR THE VISUALLY IMPAIRED
 GAMING APPLICATION
AUTOMOTIVE
VIRTUAL EDUCATION

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ADVANTAGE:-
 Digital world can behave like the real world.
Working time is reduced.
Medical field simulators allow would be
surgeons to practice digitally.

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DISADVANTAGES
The precision of touch requires a lot of advance
design.
Haptics applications require highly specialized.
hardware and considerable processing power and
hence its complex.
Haptics projects rely on fixed installations of
equipment and are not easily portable.
Debugging issues.

20. THANK YOU
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