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

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.

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.

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

Reflection of signals from the obstacles

BLOCK DIAGRAM

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.

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

Work in progress Literature survey Study and analysis of various sensors

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

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

reference “MULTISENSOR STRATEGIES TO ASSIST BLIND PEOPLE :A CLEAR PATH INDICATOR” Bruno Ando IEEE tansactions on instrumentation and measurement 2009 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