PROJECT GUIDE : Mr. Manish Okade

Submitted by : Atul Agrawal

(111EI0594)

A human interface device

Converts mechanism of hand sign language

into alphanumerical characters

Assists user to communicate with others

through ASCII text

Without communication growth of a person is

hampered.

Being a part of the society dumb should not

be deprived of their right.

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• an electronic device that translates sign

language into speech in order to make

the communication take place between

the dumb and normal people.

A product in concurrence with assistive

engineering

help dumb people of society

Improve communication capabilities

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User gesture Flex sensors Microcontroller Encoder

RF Transmitter

RF Receiver DecoderGesture

recognitionVoice

recognition

DURING TRANSMISSION

DURING RECEPTION

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Most well documented

Widely used

Visual spatial language used by deaf

community

Linguistically complete

Other sign languages: Adamorobe Sign

Language , Kenyan Sign Language ,

Zimbabwean sign languages ….

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Patented technology by Spectra Symbol

Attached to gloves by needle and thread

When the substrate is bent, the sensor

produces a resistance output correlated to

the bend radius

the smaller the radius, the higher the

resistance value

usually in the form of a thin strip from 1”-

5” long that vary in resistance

unidirectional and bi-directional.

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One side of the

polymer is printed

with a polymer link

having conductive

particles

sensor is straight : particles give the ink a

resistance say 30 kΩ

Bending of sensor : conductive particles move

further apart increasing resistance up to 50 kΩ

Sensor straightens out again : resistance

returns to the original value

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Flat resistance:

25.6 kΩ

Bend resistance:

26-32 kΩ

Temperature

range: -32 to 80C

Part length: 5.8

cm

Active length: 4.8

cm

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Even if there is

small change in

angle the

resistance

changes and thus

the voltage

Cost ineffective

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Flex Sensor using Voltage Comparator Method

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Flex Sensor Voltage Comparator Method with 2 OP-AMP

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2nd Method Flex Sensor using

Voltage Divider Method

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Atmega32 microcontroller for converting

Analog signal to Digital signal

Encoding

Transmitting

Receiving

Decoding

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http://ijset.com/ijset/publication/v2s5/pa

per5.pdf

http://www.iraj.in/up_proc/pdf/22-

1382348320ACEEHYD-2010-227.pdf%2054-

58.pdf

http://www.e-ijaet.org/media/47N13-

IJAET0313500-revised.pdf

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