presentation on tds
TRANSCRIPT
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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