HAPTIC TECHNOLOGY ASHWINI P 1PE06CS017

OUTLINE Definition Introduction Technology Working Haptic devices Applications Advantages & Disadvantages Conclusion

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

INTRODUCTION 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

TECHNOLOGY Haptic interactions can be categorized into the different types of touch sensations a user can receive: Tactile feedback Force feedback

Tactile 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.

Force feedback It reproduces the directional forces that can result from solid boundaries. E.g. the weight of virtual objects, inertia, etc.

How it Works ?

Haptic Feedback The application’s main elements are: 1) The simulation engine 2) Visual, auditory, and haptic rendering algorithms 3) Transducers

Haptic Rendering

Classification of Haptic Devices Virtual reality/ Telerobotics based devices i) Exoskeletons and Stationary device ii) Gloves and wearable devices iii) Point-sources and Specific task devices iv) Locomotion Interfaces Feedback devices i) Force feedback devices ii) Tactile displays

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.

Gloves and wearable devices The user can move naturally without being weighed down by a large exoskeleton or immobile device

Point-sources and Specific task devices Single point of contact Specialized for performing a particular task. Restricts the device to perform few functions

Locomotion Interface and full body force feedback In a confined space, simulate unrestrained human mobility such as walking and running for virtual reality.

PHANTOM DEVICE Developed by sensable technologies. Provides 3D touch

Working of Phantom The dc motor assembly is mainly used for converting the movement of the finger into a corresponding virtual movement.

Cyberglove The segments of the glove are made of aluminum and can withstand high charges; total weight does not surpass 350 grams.

Adapted to different size of the fingers contd… Adapted to different size of the fingers Located on the back of the hand Offers complete security

APPLICATIONS Surgery Military Applications Arts and design Human assistive devices Mobiles Games & many more…

Surgical Simulation Visual and haptic feedback is sent to the surgeon through endoscopic cameras and force sensors located on surgical tool.

Military Applications Flight simulators accurate simulation of real events in a safe, controlled environment Gives user haptic feedback

Disadvantages Expensive Haptic interfaces can only exert forces with limited magnitude and not equally well in all directions haptic device position sensors have finite resolution.

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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