MULTISENSOR STRATEGIES TO SUPPORT

BLIND PEOPLE: A CLEAR-PATH INDICATOR

Abstract :

The development of electronic sensing devices for the visually

impaired requires knowledge of the needs and abilities of this class of

people. In this project we present a rough analysis that can be used to

properly define the criteria to be adopted for the design of such

devices. In particular, attention will be focused on clear-path

indicators, highlighting their role in orientation and mobility tasks. A

new device belonging to this class is presented. The detector is based

on a multisensor strategy and adopts smart signal processing to

provide the user with suitable information about the position of

objects hindering his or her path. Experimental trials demonstrate the

efficiency of the device developed.

Project Description :

In this project of “Multisensor Strategies to Support Blind

People: A Clear-Path Indicator” we propose a system which can

detect obstacles for the blind people. In this new system we increase

the range of the operating device to about 40 to 240cm which is

possible only through obstacle Sensors. Here We are using ultrasonic

sensor for detecting the obstacle. Ultrasonic Receiver is placed in the

spectacle. And the transmitter placed in the walking stick. When the

obstacle detect the receiver receives the signal from the transmitter.

And indicate by voice. Two sensors are placed in the right and left

side of the stick. For any obstacle detected we warn the person

through Voice Board which gives warning for left and right side.

Block Diagram :

Hardware Used :

Obstacle Sensor.

Microcontroller.

Signal Processing.

UltrasonicSensor Signal

Processing Voice BoardMicro

Controller

Power Supply

UltrasonicSensor

ObstacleSensorUnit

Voice Board.

Power Supply.

Ultrasonic Transmitter & Receiver

Software Used :

Embedded C.

Keil Cross Compiler.