1. MULTISENSOR STRATEGIES TO ASSIST BLIND PEOPLE
INTERNAL GUIDE: Mr. R. Ganesan
Krishna Priyaa.SRI, M.E EST

2. PROBLEM DESCRIPTION
LIMITATIONS MAY BE DUE TO THE CHARECTERISTICS OF INFRARED SUCH THAT MANY OBJECTS CAN BE BARELY DETECTED DUE TO THE NARROW DIRECTIVITY.
ALSO THE DETECTION OF THE NEAREST OBJECT IS MUCH EFFECTIVE THAN THE DISTANT OBJECT.

3. SOLUTION PROPOSED
USAGE OF ULTRASONIC WAVES FOR THE DETECTION OF OBJECTS OVERCOMES THE LIMITATIONS OF INFRARED.
EFFECTIVE REFLECTION OF ULTRASONIC WAVES BY THE OBJECTS ENHANCES THE DETECTION RANGE OF THE OBSTACLES.

4. LITERATURE/RELATED WORKS
“SMART MULTISENSOR APPROACH TO ASSIST BLIND PEOPLE IN SPECIFIC URBAN NAVIGATION TASKS”
The device uses multi sensor architecture.
Infrared motion sensor is used to find the presence of the people in the path.
In Human detection mode the information given by the infrared detector is used
to notify the presence of people in the detection range of the device.
“AN ULTRASONIC NAVIGATION SYSTEM FOR BLIND PEOPLE”
Involves a microcontroller with a speech output.
Operates by sending a pulse of ultrasound and the reflection of ultrasound by the
objects in the path.
Speech output is used to assist the path for the blind people

5. Reflection of signals from the obstacles

6. BLOCK DIAGRAM

7. Methodology SYSTEM ANALYSIS AND DESIGN
INTERFACE OF ULTRASONIC SENSOR WITH MICROCONTROLLER AND DETECTION OF OBSTACLE.
INTERFACING VIBRATION SENSOR TO IDENTIFY THE PRESENCE OF VEHICLES.
ALERTING THE PRESENCE OF FIRE BY INTERFACING TEMPERATURE SENSOR.
DESIGN OF AUDIO AMPLIFIER BOARD
INTERFACING OF AUDIO AMPLIFIER BOARD AND LOUD SPEAKER.
PROTOTYPING AND TESTING.

8. resources
Hardware
Microcontroller PIC16F877A
Vibration sensor
Temperature sensor
Ultrasonic sensor
Software
MP Lab IDE

9. Work in progress Literature survey
Study and analysis of various sensors

10. Deliverables for next review
Identification of the sensors.
Analysis of the sensor interfacing.

11. time frame S.no PHASES DURATION STATUS 1. LITERATURE SURVEY
END OF JULY
COMPLETED 2.
SYSTEM ANALYSIS AND DESIGN
END OF AUGUST
IN PROGRESS 3.
INTERFACE OF ULTRASONIC SENSOR
END OF SEPTEMBER 4.
INTERFACE OF TEMPERATURE SENSOR
END OF OCTOBER 5.
INTERFACE OF VIBRATION SENSOR
END OF NOVEMBER 6.
DESIGN OF AUDIO AMPLIFIER BOARD
END OF DECEMBER 7.
INTERFACING AUDIO AMPLIFIER BOARD AND LOUD SPEAKER
END OF JANUARY,2011 8.
PROTOTYPING AND TESTING
END OF MARCH,2011 9.
FINAL DEMO
END OF APRIL,2011

12. reference
“MULTISENSOR STRATEGIES TO ASSIST BLIND PEOPLE :A CLEAR PATH INDICATOR” Bruno Ando IEEE tansactions on instrumentation and measurement August .
“A LOW COST ARTIFICIAL SYSTEM FOR VISUALLY IMPAIRED PEOPLE” Asim Iqbal, Umar farooq, Hassan Mohamad 2009 second international conference on computer and electrical engineering.
“SMART MULTISENSOR APPROACH TO ASSIST BLIND PEOPLE IN SPECIFIC URBAN NAVIGATION TASKS” B.Ando IEEE Transactions on neural system and rehabiliation engineering 2008 december