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HAPTIC

TECHNOLOGYBY

IRANNA.M.LEKKIHAL2BL08IS009

Underguidence ofProf:santhosh.c

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IMPORTANT CONCEPTS IN HAPTICS.

EXAMPLES OF HAPTIC COMMERCIAL

PRODUCTS.

APPLICATION IN VARIOUS FIELDS.

SUMMARY.

OUTLINE

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Haptic- technology that adds sense of touch to

virtual environmental.

HAPTICS-The technology that interfaces

human with virtual enviroinment via touch.

Developing a haptic devices to physically

interact with a Virtual or remote enviroinment.

Originated from the Greek wordHAPTETHESAI(contact or touch).

WHAT IS HAPTICS ?

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WORKING OF HAPTICS

The figure consist of 2 parts

1.Human part(left): That sense and control theposition of the hand.2.Machine part(right) : That acts the forces from hand

to virtual objects.

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TACTILE INFORMATIONS: It is the

information acquired by the sensors , which are

actually connected to human body by changing

the body position.

KINESTHETIC INFORMATION: This

information acquired through the sensors in thejoints.

HAPTIC INFORMATION=TACTILE

HAPTIC INFORMATION

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VIRTUALREALITY

1) Creation of anartifi-

cial environment.

2) 3D effect.3) Increased

realism.

4) Special sensory

input

devices are used.

Fig1

Fig

Fig3

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HAPTIC FEEDBACK

BASIC BLOCK DIAGRAM and MAIN

ELEMENTS:

1) Simulation Engine:

responsible for creating virtualenvironment over time.

2) visual,audio and Haptic Rendering Algorithms:

which

create the virtual

environmental graphics,sounds and

force response towardthe user.

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HAPTIC DEVICESA device is one that provides a

physical interface between user and

virtual environmental .

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1) VIRTUAL REALITY/TELEROBOTICS

) Exoskeletal devices: The system cover the user or

the dress the user has to wear when interface withthe virtual environment.

Gloves and wearable devices:) Smaller exoskeletal devices.

2) FEEDBACK DEVICES

CLASSIFICATION ofhaptic devices

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SOME POPULARLY USED HAPTIC INTERFACING DEVICES

PHANTOM

i) Devoloped by Sensable Tech.

ii) 6 DOF device.

iii) Force feedback.

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CONTACT DISPLAY DESIGN

When user puts one finger in thimble, than he

moves the finger after he feelthe shape and size of virtual 3 dimensional object.

The dc motor assembly is mainly used for

converting the movement of thefin er Into correspondin virtual movement.

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CYBERGLOVE

Devoloped byImmersion corp.

Basic systemincludes

1) Cyberglove.

2)An

instrumentation

unit.

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OTHER POPULARLY

USED

HAPTIC DEVICES..

BMW IDRIVE

VIBROTACTILE VEST

Fig5

Fig6

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HAPTIC INTERFACE

The interface occur at interaction tool of haptic devicethat mechanically

Couples two controlled dynamical systems.

The two blocks they sense the environments,makedecisions about future action.

The haptic interface with a computer and the user is

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AVATAR

1) Virtual representati

on of the hapticinterface by which

the user physically

interacts with the

virtual env .

2) Choice of avathar

depends on

the object simulated

and the device capa-

bilities.

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1) Compute the interaction forces b/w the haptic

devices and virtual object.

1) Ensure that the haptic device correctly renders

such forces on the human operator.

HAPTIC RENDERING

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HAPTIC RENDERINGALGORITHMS

SYSTEM ARCHITECTURE

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The haptic rendering algorithm contain 3 main blocks

1.Collision detection:It detects the collision betn obj and avathar In

virtual objects.

2.Force response algorithm:compute the interaction force betn the

Avathar andvirtual objects . When collision occurred.

The force response algorithm sendinteraction force to the

control algorithm ,which apply to theoperator through

haptic devices while maintain stable overbehavior.

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1) Graphical user interfaces.

2) Surgical simulation and medical training.

3) Telerobotics.

4) Military applications.

5) Museum displays.

APPLICATIONS

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GRAPHICAL USER INTERFACES.

In futures video games the player fell that , he isplaying physicaly with otherPersons in real world.

The novint falcon haptic controller is already using

for this purpose.

Technology of placingtwo smallPiezoelectric sensorspads underthe screen.

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SURGICAL SIMULATION &

MEDICAL TRAINING

In futures expert surgens

in romotePlace ,but he can do theoperationBy using this technology.

The VHB technology alsoThe VHB technology helps

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MILITARY TRAINING

The flight simulator createthe virtualEnvironment ,that is look likereal.

And the trainer outside thesimulatorsCommands to change themode of

Environment.

The pilots are trained tocontrol planes inDifferent suituations and

emergency landing.

The VR simulator helps to

train soldiers forAccurate Shooting at thewars.

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1) Can only apply forces with limited magnitude.2) Haptic systems arent ideal force

transducers due to existence of friction,

inertia etc.3) The position sensors have finite resolutions

and finite range.

LIMITATIONS OFHAPTICS

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1) Future for online computing and e-commerce.

2) Enhance the shopper experience and help

online shopper to feel the materials without leavetheir home.

3) Because of the increasing applications ofhaptics, the cost of the haptic devices will drop in

future.

CONCLUSION

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[1] Anonymous."Haptic technology" Availableat:

http://en.wikipedia.org/wiki/Haptic_technology[2] Rebecca Boduch. "Haptic Technology",

ELE 282[3] Lake Porter and Jutta Treviranus.:Haptic

Applications to Virtual worlds available at

http://idrc.ocad.ca/index.php/resources/idrc-online/49-articles-and-papers/211-haptic-applications-to-virtual-worlds

References

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THANK

YOU