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A SEMINAR REPORT ON

“HAPTIC TECHNOLOGY”

SUBMITTED IN PARTIAL FULFILLMENT FOR THE DEGREE OF BACHELOR OF TECHNOLOGY IN

“INFORMATION TECHNOLOGY” BY

“ANJALI A. SHAH” IT-3 UNDER THE GUIDANCE OF

PROF.PRAKASH KHELAGE

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OUTLINE

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

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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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What haptic provides us?

Improved Usability Enhanced Realism Restoration of Mechanical Feel

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Haptic interaction loop with user and 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

.

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The haptic rendering is divided into three main 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.

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DESIGNING FACTORS

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.

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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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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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CHARACTERISTICS1) 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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DISADVANTAGESThe 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.

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THANK YOU