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ELECTRONIC DRESS FOR NAVIGATION OF VISUALLY CHALLENGED PERSON

ByG. NAGANANDHINI ( Reg. No. 951711106059)R. SOPHIA DELSI ( Reg. No. 951711106097)IV B.E ECE - C

Guided ByG. PREMAProfessor/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 – ITITLE 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 EMBSSan Diego,California USA

PUBLISHED YEAR 28th August- 1st September 2012

ABSTRACT It consist of: -Coloured navigational lines with IC tags - Intelligent white caneEach coloured line is assigned for each destinationWhen 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,IEEE29th Annual International Conference of IEEE

PUBLISHED YEAR August 23-26,2007

ABSTRACT Low cost, portable navigational aid using RFIDIt 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 MICROCONTROLLER

INFRAREDSENSOR

VOICE RECOGNITION KIT HM2007

POWER SUPPLY

VOICE PLAYBACK

KIT APR33A3

EARPHONE

RF RXRF 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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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 basinNode A

Staff roomNode B

Turning pointNode C

Bio medical labNode 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 BJECT

POWER SUPPLY

VOICE PLAYBACK KIT

APR33A3

EARPHONE

IRSENSOR

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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 28 th 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