HapticsHaptics‘Touch the virtual’‘Touch the virtual’

ATHUL.KATHUL.K Roll no:10Roll no:10

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‘‘Haptics’ is derived from the Greek word ‘haptikos’Haptics’ is derived from the Greek word ‘haptikos’which means-”being able to come into contact with”which means-”being able to come into contact with”

THE SCIENCE OF TOUCHTHE SCIENCE OF TOUCH

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Virtual RealityVirtual Reality

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

• It’s a mere imitation of the real world.It’s a mere imitation of the real world.

• BUT IS IT COMPLETE???BUT IS IT COMPLETE???

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The real worldThe real world

Our primary interface with the real world is Our primary interface with the real world is our haptic sense (sense of touch).our haptic sense (sense of touch).

How important is our sense of touch?How important is our sense of touch?

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In order to complete the imitation of the In order to complete the imitation of the real world one should be able to interact real world one should be able to interact with the environment and get a feedback.with the environment and get a feedback.

User should be able to touch the virtual User should be able to touch the virtual object and feel a response from it.object and feel a response from it.

This feedback is called Haptic Feedback.This feedback is called Haptic Feedback.

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Basic idea Basic idea Haptics, is the technology of adding the sensation of touch and feeling to computers.

A haptic device gives people a sense of touch with computer-generated environments, so that when virtual objects are touched, they seem real and tangible.

Understanding and enabling a compelling experience of Presence not limited to "being there", but extended to "being in touch" with remote or virtual surroundings

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The TechnologyThe Technology Haptics is implemented through different type of Haptics is implemented through different type of

interactions with a haptic device communicating with interactions with a haptic device communicating with the computer. Thesethe computer. These interactions can be categorized interactions can be categorized into the different types of touch sensations a user can into the different types of touch sensations a user can receive:receive:

Tactile feedbackTactile feedback Force feedbackForce feedback

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Tactile feedbackTactile feedback

Refers to the sensations felt by the skin.Refers to the sensations felt by the skin.

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

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Force feedbackForce feedback

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

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

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Data transferData transfer

• Virtual Reality Modeling language (VRML)Virtual Reality Modeling language (VRML)

• Tells the interface how much force the Tells the interface how much force the haptic device should return when it is haptic device should return when it is touched.touched.

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How it works?How it works?

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Haptic devicesHaptic devices

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

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How are Haptic devices different?How are Haptic devices different?

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

• Haptic devices are input-output devices.

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THE NOVINT FALCONTHE NOVINT FALCON

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THE NOVINT FALCONTHE NOVINT FALCON The Novint Falcon is the first haptic interface device toThe Novint Falcon is the first haptic interface device to bring 3D touch.bring 3D touch.

As the Novint Falcon is moved, the computer keeps As the Novint Falcon is moved, the computer keeps track of a 3D cursor. track of a 3D cursor.

When the 3D cursor touches a virtual object, the When the 3D cursor touches a virtual object, the computer registers contact with that object.computer registers contact with that object.

And updates currents to motors in the device to create And updates currents to motors in the device to create an appropriate force to the device’s handle, which the an appropriate force to the device’s handle, which the user feels.user feels.

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Exoskeletons Exoskeletons

large and immobile systems that the user must attach him or herself to.their large size and immobile nature allow for the generation of large and varied force information.

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Gloves and wearable devicesGloves and wearable devices

The user can move naturally without being The user can move naturally without being weighed down by a large exoskeleton or weighed down by a large exoskeleton or immobile deviceimmobile deviceE.g.Hand MasterE.g.Hand Master

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Working Working

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Phantom devicePhantom device

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It works by monitoring the position of a It works by monitoring the position of a users fingertip or hand through optical users fingertip or hand through optical encoders attached to the deviceencoders attached to the device

The geometric, material, kinematic, and The geometric, material, kinematic, and dynamic properties of the world we wish to dynamic properties of the world we wish to represent can be modeled and stored.represent can be modeled and stored.

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Locomotion interface and full body Locomotion interface and full body force feedbackforce feedback

In a confined space, simulate unrestrained human mobility such as walking and running for virtual reality.

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Tactile displaysTactile displays

Tactile feedback tells us the texture of the Tactile feedback tells us the texture of the surfaces.surfaces.

Using this we can feel different surfaces Using this we can feel different surfaces and slipping sensations can be produced.and slipping sensations can be produced.

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ApplicationsApplications

Virtual realityVirtual realityVirtual surgery Virtual surgery SurgerySurgery

Tele-presence Tele-presence Tele-presence Tele-presence Human assistive devices Human assistive devices Slide 23 Slide 23

Games & many more…Games & many more…

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SurgerySurgery

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Tele-presenceTele-presence

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Conclusion Conclusion

The next important step towards realistically simulated environments that have been envisioned by science fiction authors and futurists alike.Large potential for applications in critical fields as well as for leisurely pleasures. Haptic devices must be miniaturized so that they are lighter, simpler and easier to use.

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Reference Reference

www.globalhaptics.comwww.globalhaptics.comwww.worldhaptics.comwww.worldhaptics.comwww.nasa.govwww.nasa.gov www.immersion.comwww.sensable.comwww.sarcos.com

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QUESTIONS???QUESTIONS???

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