Presentation on TDS

8/12/2019 Presentation on TDS

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TONGUE DRIVEN

ROBOT

PRESENTED BY

KANJARIYA SAHDEV D.(080280111015)CHAUHAN BHARAT K.(080280111005)

KANZARIYA DILIP A.(080280111016)

CHAUHAN HITENDRA R.(080280111006)


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TOPICS

Definition

Development

Why the tongue?

An example of system

Block Diagram of TDS

Components

How does it work?

Other Applications

Advantages

Disadvantages

Conclusion


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DEFINITION

The "Tongue Drive System

is a tongue-operated

assistive device which helps

individuals with physicaldisabilities such as spinal

cord injuries.

This system is controlled bythe movement of tongue.


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DEVELOPMENT

This system was developed by

the engineers of Georgia

Institute of Technology ,

United States in June 2008.

It is one of the nation's top

research universities,

distinguished by its

commitment to improving thehuman condition.


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WHY THE TONGUE?

Tongue movement is fast, accurate and does not require

much concentration or effort.

Unlike hands and feet, which are controlled by the brain

through the spinal cord, the tongue is directly connected

to the brain by a cranial nerve.

It generally escapes in severe spinal cord injuries or other

damages and its movement continues.


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BLOCK DIAGREM OF TDS


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COMPONENTS

Permanent Magnetic Tracer

A small permanent magnet is

placed on the tongue by

piercing, or tissue adhesives

that is used as a tracer.

The movement of which is

detected by an array ofmagnetic reed switches

mounted on a headset

outside the mouth.


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Magnetic Reed Switch

Module To receive the signals from

magnetic tracer a magnetic reed

switch is used. It is placed on

headset around the mouth. It isused to sense proximity of the

magnetic tracer.

Control Unit It is used to transmit the

wireless signals.


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Wireless Receiver

Wireless signals are received by a wireless receiver. The

Sensor Signal processing algorithm runs on micro

controller.

Driven System

The driven system may be computer, wheelchair or

motorized bed.


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HOW DOES IT WORK?

To operate the TDS the motion of the tongue is traced by an

array of magnetic switches, which sense the magnetic field.

The magnetic field generated by the tracer is detected by the

switches module as the tongue moves.

The switches outputs is then modulated and transmitted

across a wireless link to an external controller.


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By processing these outputs we can also control the

movement of the pointer on the screen.

Assigning a certain controller function to each tonguemovement is done by the software.

There are four commands: right, left, forward and

backward.


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OTHER APPLICATIONS


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ADVANTAGES

The signals from the magnetic switches are linear functionsthe magnetic field, which is a continuous position dependent

property. Thus a few switches are able to capture a wide

variety of tongue movements.

This would provide a tremendous advantage over sensor

based devices.

These would offer smoother, faster, and more naturalcontrols as the user is saved from the trouble of complex

output variation.


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The permanent magnet which generates the magnetic field

is a small, passive, and inherently wireless component

which leads to user convenience.

Due to the proximity of the magnet and magnetic reed

switches in the oral cavity, the Tongue Drive system is

expected to be more robust against noise, interference, and

involuntary movements compared to alternative

technologies.


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DISADVANTAGES

Implementation is slightly harder.

Slightly costlier.

Computer battery could die when not around charger.

Could take a while to learn how to use it.

Computer could go down.


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THANK YOU

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