MAHARISHI ARVIND INSTITUTE OF ENGINEERING AND TECHNOLOGY

Seminar on Haptic Technology

Department of computer science

Presented by: Mukesh Kumar

Haptics…..?????????

Derived from greek word

‘haptikos’ meaning “ABLE TO

COME INTO CONTACT WITH”.

Haptics = Touch = Connection

Touch is at the core of personal experience.

INTRODUCTION

Haptics , is the technology of adding the

sensation of touch to computers.

When virtual objects are touched, they seem real and tangible.

Haptic senses links to the brain's sensing position and movement of the body by means of sensory nerves within the muscles and joints.

Basic system configuration

4

3

24 3

2

1

1

End effector

Hand

Actuators

Muscles

Sensors

Tactile

&kinesthetic

Info:

Motor Commands

Motion

Contact

Forces

Virtual object

Position information

MachineHuman

Motion

Forces

Torque

Commands

Computer haptics

Sensors

HAPTIC FEEDBACK

Two types 1. Kinesthetic feedback

2. Tactile feedback

Types of Haptic devices

VIRTUAL REALITY/ TELEROBOTICS BASED DEVICES

1. EXOSKELETONS AND STATIONARYDEVICES

2. GLOVES AND WEARABLE DEVICES

3. POINT SOURCES AND SPECIFIC TASK DEVICES

4. LOCOMOTION INTERFACES FEEDBACK DEVICES

1. FORCE FEEDBACK DEVICES

2. TACTILE DISPLAY DEVICES

PHANTOM INTERFACE

CYBER GRASP SYSTEM

Haptic devices

COMMONLY USED HAPTIC DEVICES

1. PHANTOM• providing a 3D touch to

the virtual objects• provides 6 d.o.f• 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

• virtual 3 dimensional space in which the phantom operates is called haptic scene

2. cyber grasp

• The CyberGrasp system fits over the user's entire hand like an exoskeleton and adds resistive force feedback to each finger.

• Allows 4 dof for each finger• Adapted to different size of

the fingers• Located on the back of the

hand• Measure finger angular flexion

(The measure of the joint angles are independent and can have a good resolution given the important paths traveled by the cables when the finger shut.

Necessary Criteria for an Effective Interface:

. Free space must feel free.

. Virtual constraints must not be easily saturated.

. Low back-drive inertia and friction.

. Minimal constraints on motion imposed by the device kinematics so free motion feels free

APPLICATIONS OF HAPTICS

MEDICAL APPLICATIONS

• sense of touch is crucial for medical training.

• Various haptic interfaces for medical simulation may prove especially useful for training.

MILITARY APPLICATIONS

Haptics has also been used in aerospace and military training and simulations.

For certain applications, for example where terrain or texture information needs to be conveyed, haptics may be the most efficient communication channel.

ASSISTIVE TECHNOLOGY FOR THE BLIND AND VISUALLY IMPAIRED

feel maps that are displayed on the internet and also learn mathematics by tracing touchable mathematical course.

Most haptic systems still rely heavily on a combined visual/haptic interface.

MUSEUM DISPLAY

A few museums are exploring methods for 3D digitization.

ENTERTAINMENT

Haptics is used to enhance gaming experience.

software also allows you to program force feedback sensations to your game controller button press.

"Submarines" is a PHANToM variant of the well known battleship game.

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.

THANK YOU

QUESTIONS ??????