assistive technology for the dumb

8/13/2019 Assistive Technology for the Dumb

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A design of a prototypic Hand-Talk: Assistive Technology forthe Dumb

SYN!S"S:

In general, deaf people have difficulty in communicating with others who

dont understand sign language. Even those who do speak aloud typically have a

deaf voice of which they are self-conscious and that can make them reticent. The

and Talk glove is a normal, cloth driving glove fitted with fle! sensors along the

length of each finger and the thum". The sensors output a stream of data that varies

with degree of "end. The output from the sensor is analog values it is converted to

digital and processed "y using microcontroller and then it will "e transmittedthrough wireless communication #$%&, then it will "e received in the $eceiver

section and processed using responds in the voice using speaker.

In this pro'ect %le! (ensor )lays the ma'or role, %le! sensors are sensors that

change in resistance depending on the amount of "end on the sensor. They convert

the change in "end to electrical resistance - the more the "end, the more the

resistance value. They are usually in the form of a thin strip from *+-+ long that

vary in resistance from appro!imately * to kilo ohms. They are often used in

gloves to sense finger movement. %le! sensors are analog resistors. They work as

varia"le analog voltage dividers. Inside the fle! sensor are car"on resistive

elements within a thin fle!i"le su"strate. ore car"on means less resistance. /hen

the su"strate is "ent the sensor produces a resistance output relative to the "end

radius. /ith a typical fle! sensor, a fle! of degrees will give *0 resistance with

a fle! of 1degrees will give 2-3 0 ohms. The 4end (ensor lists resistance of

2-5 0 ohms.

In this system we use $adio %re6uency (ignal to transmit the signal from

transmitters to $eceptors, in this pro'ect we have used microcontroller, a speech I7

and also a speaker to produce the output.


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!#$%&' STAT&'&NT:

Manual operation

Persons actions are difficult to understand

Conveying information to be take more time

!#!S&D SYST&':

Systematic approach

Compact system

Conveying information to others are easy

Easy way of sensing signal

Lower to barrier communication

Flexible system

$%() D"A*#A':

Transmitting $lock:

icro7ontroller 8nit

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EncoderEncoder

7arrier(ignal

essage

(ignal

odulation

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#eceiving $lock:

#&+,"#&'&NTS:Hardare Tools:

MicrocontrollerP!C"#f$%%&' &($)S*"+

,F modules

Encoder

-ecoder

.oice Chip

Flex Sensors

Softare Tools:

MPL&/ !-E

0E!L !-E

FL&S1 Programmer

P!C 0!( 2

3,C&-

Embedded C

A!!%"(AT"NS:

Physically challenged persons

Conveying information related operations

Communication systems

:emodulator

8nit

;oice

7hip

icro 7ontroller(ection

:ecoder8nit

(peaker

assistive technology for the dumb

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