HAPTICSTECHNOLOGY

(TOUCH THE VIRTUAL)

INTRODUCTION Haptics is a technology of adding the sensation of touch andfeeling to computers.

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

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

HAPTICS…??? Derived from Greek word ‘haptikos’ meaning “Able to come into contact

with” .

Haptics = Touch = Connection

Touch is at the core of personal experience.

Of the five senses, touch is the most proficient, the only one capable ofsimultaneous input and output.

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.

SYSTEM CONFIGURATION4

3

24 3

2

1

1

End effector

Hand

Actuators

Muscles

Sensors

Virtual object

MachineHuman

Computer

hapticsSensors

WORKING PRINCIPLE

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.

WORKING PRINCIPLE

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

PHANTOM INTERFACE CYBER GRASP SYSTEM

COMMONLY USED HAPTIC DEVICES1. PHANTOM

providing a 3D touch to thevirtual objects

provides 6 d.o.f

when the user move his finger,then he could really feel theshape and size of the virtual 3Dobject that has been alreadyprogrammed

virtual 3 dimensional space inwhich the phantom operates iscalled haptic scene

PHANTOM WORKING

CYBER GRASP The Cyber Grasp 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

INTERESTING FACTS

Most of us would have experience the use of this technology in movies like iron man ,avatar .

Disney Research, Pittsburg (DRP) has shown off a revolutionary technology called ‘Surround Haptic’ that can bring real life experience in video gaming and film watching.

In Apple IPhone 6 For advance vibration unit they have used haptic technology .

Haptic is designed to give tactile sensations to people who are using motion control devices. The device can track a target, like a user's hand, and send a compressed ring of air quickly through the intervening space to provide haptic feedback.

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

Holographic Interaction

The feedback allows the user to interact with a hologram and actually receive tactile response using acoustic radiation pressure.

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 .

Textile Industry

User could study and feel the texture and quality of material during the sale of cloth through internet.

APPLICATIONS Entertainment-

Computer and video games -

It is used to enhance the gaming experience .Haptic feedback is

commonly used in arcade games, especially racing video games. It is also used in movies.

Virtual Surgery – we can do virtual

surgery by using haptic technology .

APPLICATIONS

APPLICATIONS

Personal computers-

Apple's MacBook and

MacBook Pro started

incorporating a

"Tactile Touchpad" design.

Mobile devices-

Tactile haptic feedback

is becoming common

in cellular devices. Nokia

and LG implemented

it using piezoelectric

sensor pads.

CONCLUSION

Haptic Technology is the only solution which provides high range of interaction that cannot be provided by virtual reality.

Continued implementation of tactile devices to aid people with disabilities will advance further.

Todays, commercial success of haptic has been in the areas of entertainment, medical simulation, and design, although new devices and applications are regularly appearing.

Haptic technology will make the future world as a sensible one.