This document describes an electronic navigation system designed to help visually impaired individuals navigate indoor environments independently. The system uses RF transmitters and receivers to determine the user's location and provide voice directions to their destination. An infrared sensor is also used to detect obstacles and warn the user. When developed, it will allow blind individuals to travel without needing assistance or a walking stick by sensing their surroundings and providing turn-by-turn navigation instructions through an audio interface.

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ELECTRONIC DRESS FOR NAVIGATION
OF VISUALLY CHALLENGED PERSON
By
G. NAGANANDHINI ( Reg. No. 951711106059)
R. SOPHIA DELSI ( Reg. No. 951711106097)
IV B.E ECE - C
Guided By
G. PREMA
Professor/ECE

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OBJECTIVE
To provide effective assistance to increase
the mobility of the visually challenged
person in an indoor environment.

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LITERATURE SURVEY – I
TITLE OF THE PAPER A Navigation System For Visually Impaired An Intelligent
White Cane
CONFERENCE A.Jin Fukasawa and Second Kazusihge Magatani
34th Annual International Conference of IEEE EMBS
San Diego,California USA
PUBLISHED YEAR 28th August- 1st September 2012
ABSTRACT It consist of:
-Coloured navigational lines with IC tags
- Intelligent white cane
Each coloured line is assigned for each destination
When color sensor finds target color , white cane informs
that he/she is on the navigational line by vibration.
DRAWBACK • Finds difficulty if there are more number of destinations
because more coloured lines are to be used.
• It cannot distinguish different color line at the cross
point of two different route

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LITERATURE SURVEY – II
TITLE OF THE PAPER RFID Based Indoor Navigational Aid For Persons With
Severe Visual Impairments
CONFERENCE Andrew Y.J Szeto,Fellow IEEE and Satish K. Sharma,
Senior Member,IEEE
29th Annual International Conference of IEEE
PUBLISHED YEAR August 23-26,2007
ABSTRACT Low cost, portable navigational aid using RFID
It provides
-current location
-route to the desination
DRAWBACK •The range of RFID is small.
•More number of RFID tags has to be installed

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EXISTING MODEL
 Outdoor navigation – Global Positioning
System(GPS)
 GPS provides accurate location for any
outdoor environment
 GPS receivers cannot perform well in indoor
environments because of absence of line of
sight to the satellites.
 It can provide directions, but not reliable or
accurate enough for use in buildings.

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NAVIGATION SYSTEM
Major functions
 To help people travel with independence
 Sensing the immediate environment for
obstacle
 Providing information about location and
route them to reach the intended destination

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CONT..
 Indoor navigation – Radio Frequency (RF)
Transmitter and Receiver
 Voice alert to avoid obstacle
 The system relies on the location
information and user’s destination.
 Voice assistance.

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MODULES USED
 USER MODULE:
-Obstacle detection
-Navigational path
-Voice assistance
 INDOOR MODULE:
-Location information

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BLOCK DIAGRAM
PIC 16F877a
MICROCON
TROLLER
INFRARED
SENSOR
VOICE
RECOGNI
TION KIT
HM2007
POWER
SUPPLY
VOICE
PLAYBACK
KIT
APR33A3
EAR
PHONE
RF RX
RF TX
POWER
SUPPLY
User
Module Indoor
Module

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RF TRANSMITTER AND
RECEIVER
• RF signal can travel through a longer
distance .
• It can travel even when there is obstacle
between transmitter and receiver.
• RF TX and RX uses a specific frequency of
434MHz.

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1
RF TRANSMITTER
• RF TX 02 acts as indoor module
• It is provided with the supply of 3V
• RF transmitter TX covers a range of 3m.
• RF transmitters are placed in such a way that
no signal overlaps.
• RF transmitter sends a data to the RF receiver
at user module.
INDOOR MODULE

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RF RECEIVER
• Receiving unit is present at the user module
in the Electronic Dress.
• It consists of RF Receiver RX3304, decoder
and a buffer.
• The received signal is decoded and passed
to the buffer before being sent to the
Microcontroller.
USER MODULE

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CONT…
• This data reveals the identity of the
transmitting RF, by means of this the
location of the user is found.
• Location information is processed by the
Microcontroller to route the user to the
intended destination.

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No
Yes
Start
Destination is Given as Voice Input
Through HM2007
Current Location is
Sensed by RF TX
Read the Location Along the
Route by PIC16F877A
Current
Location= =
Destination
Command the User to
Proceed in the Respective
Direction
FLOWCHART- INDOOR NAVIGATION
Stop

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MICROCONTROLLER
PIC16F877A
• It processes the signal from RF receiver.
• It provides the route to the user’s
earphone via the playback kit.
• Port RB0-RB3 is connected to the
channels of APR33A3
• Port RC0-RC3 is connected to the
receiver via buffer.
• Port RD0-RD3 is connected to the voice
recognition kit HM2007.

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NAVIGATIONAL PATH
Wash
basin
Node A
Staff
room
Node B
Turning
point
Node C
Bio
medical
lab
Node D

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CONT..
• At each node a RF Transmitter is placed .
• Now the user is at Node D and gives his destination as
Staff room through voice input.
• Each RF TX sends a signal to the user module based on
which he is given the directions to reach staff room.
• When the user is at Node D, he receives the voice signal as
walk straight.
• When he receives the signal from Node C , he is assisted to
turn right and walk straight.
• When the user reaches Node B, the voice output says
destination reached.

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OBSTACLE DETECTION-
BLOCK DIAGRAM
O
B
J
E
C
T
POWER
SUPPLY
VOICE
PLAYBACK KIT
APR33A3
EARPHONE
I
R
S
E
N
S
O
R

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OBSTACLE DETECTION USING
INFRARED SENSOR
• A pulse of IR light is emitted by the emitter.
• The light travels out into the field.
• It detects obstacle at a distance of 80cm.
• If there is no object, the light is never reflected.
• If the light hits an object, it returns to the detector.
• The received signal is given to the voice playback
kit(APR33A3) which plays the recorded voice as
obstacle detected.

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SOFTWARE IMPLEMENTATION

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HARDWARE IMPLEMENTATION

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SOCIAL IMPACT
• This navigation system supports the independent
walking of the visually challenged in the indoor
space.
• It eliminates the need for a visually challenged
person to carry a walking stick.
• The directions and location information can be
useful for search and rescue operations.

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CONCLUSION
• The design and development of electronic
dress for navigation of visually challenged
person is used for navigation in an
unfamiliar environment.
• The implementation part has been done in
Department of ECE 2nd floor of Mepco
Schlenk Engineering college.

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FUTURE SCOPE
-“Electronic Dress for Navigation of Visually
Challenged Person” was implemented for navigation
in a particular building, for navigation in any indoor
space a microcontroller and a Bluetooth has to be
affixed at the entrance of a building.
-This section will contain the path information to
every destination in a particular building.
-When the user reaches the entrance the data from the
controller in the building will be transmitted to the
controller in user module via Bluetooth.

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REFERENCES
[1] M. R. Adame, J. Yu, K. Moller, and E. Seemann. A wearable navigation aid for blind people
using a vibrotactile information transfer system. In Proc. Int. Conf. on Complex Medical
Engineering, pages13–18, 2013.
[2] P. Baranski, M. Polanczyk, and P. Strumillo “A remote guidance system for the blind”. In
Proc. IEEE Int. Conf. on e-Health Networking Applications and Services, pages 386–390,
2010.
[3] N.Takatori , K.Magatani et al.:”Development of voice navigation system for the visually
impaired by using IC tags”, Proceedings of the 28th Annual International Conference of the
IEEE EMBS(2006).
[4] Y,Hirahara,K.Magatani et al.: “Development of the navigation system for the visually
impaired by using white cane”, Proceedings of the 28th Annual International Conference of
the IEEE EMBS(2006).
[5] Roopsai.V, Selvarathinam.S, Varun Krishna K.G “Blind Aid using Radio Frequency
Identification and Ultrasonic Sensors”, IJCSEE Volume 1, Issue(1) 2013.
[6] U.Biader Ceipidor et al., SeSaMoNet: An RFID based economically viable navigation system
for the visually impaired, International Journel of RF Technologies: Research and
Applications,1754-5749, Volume I, Issue 3, pages 214-224,2009.
[7] L. A. Johnson and C. M. Higgins, “A navigation aid for the blind using tactile-visual sensory
substitution,” in Proc. 28th Annu. Int. Conf. IEEE Eng. Med. Biol. Soc., New York, 2006, pp.
6298–6292.
[8] Ran L., S.Helal, S.Moore, Drishti: An Integrated Indoor/Outdoor Blind Navigation System and
Service, Proc. 2nd IEEE Annual Conf. on Pervasive Computing and Communications, pp.23-
30, 2004.

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THANK YOU