Prepared by: Jignesh Khunt Roll No : 25

MCA – IVDepartment of Computer Science

‘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.

bidirectional communication between humans and computers to include sensory feedback.

Haptics = Touch = Connection

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

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 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

Refers to the sensations felt by the skin.

It allows the user to feel things such as the texture of surfaces, temperature and vibration.

It reproduces the directional forces that can result from solid boundaries.

E.g. the weight of virtual objects, inertia, etc.

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Computer haptics

Sensors

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

Common interface devices like mouse and joystick are only input devices. No feedback.

Haptic devices are input-output devices.

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

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

A technology for feeling sensation over total body

Computer and video games

Disney Research Pittsburg has Shown off a technology called “Surround Haptics” that 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 feedback 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

The Design Research Lab in Berlin, Germany has developed a haptic feedback glove designed specifically for blind users to improve texting capabilities.

The Lorm glove allows blind users to text by tapping various sensors, and to receive text via vibrations.

Lorm glove

Interaction Research group at Microsoft Research Redmond developing through

user touch and feel objects inside the virtual world

flat touch screen convey depth, weight, movement, and shape

moving a finger on the screen, the user can interact with on-screen 3-D objects and experience different force responses that correspond to the physical simulation.

Working time is reduced.

Communication is centered through touch and the digital world can behave like the real world.

Increase confidence in medical field.

With haptic hardware and software designer can feel the result as if he/she were handling physical objects.

Higher cost.

Large weigh & size

The precision of touch require a lots of advance design.