121.voice controlled robo

8/12/2019 121.Voice Controlled Robo

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Voice controlled intelligent ROBO

ABSTRACT:

Design and develop an economical, fully automated, human voice controlled wheelchairfor physically challenged persons.

This pro ect aims at controlling the movement of an ordinary wheel chair !y means of theusers" voice signal. #t uses a sound recognition #C for accepting the voice command from theuser. This is then passed to a microcontroller which processes the voice signal and providesthe necessary speed and direction control signals to the dc motors which rotate the wheelsof the chair.

The heart of the circuit is the $%&''( speech recognition integrated circuit. The chip providesthe options of recogni)ing either forty .*+ second words or twenty .*& second words.

This circuit allows the user to choose either the .*+ second word length - ' wordvoca!ulary/ or the .*& second word length -&' word voca!ulary/. 0or memory the

circuit uses an 12 3 1 static RA%.

The chip has two operational modes4 manual mode and C56 mode. The C56 mode isdesigned to allow the chip to wor7 under a host computer. This is an attractive approachto speech recognition for computers !ecause the speech recognition chip operates as aco8processor to the main C56. The o!s of listening and recognition doesn"t occupy anyof the computer"s C56 time. 9hen the $%&''( recogni)es a command it can signal aninterrupt to the host C56 and then relay the command code. The $%&''( chip can !ecascaded to provide a larger word recognition li!rary.

Speech recognition is classified into two categories, spea7er dependent and spea7er

independent. Spea7er dependent systems are trained !y the individual who will !e usingthe system. These systems are capa!le of achieving a high command count and !etterthan * ; accuracy for word recognition. The draw!ac7 to this approach is that thesystem only responds accurately only to the individual who trained the system. This isthe most common approach employed in software for personal computers.

Applications:

Speech controlled appliances and toys

Speech assisted computer games

Telephone assistance systems

<oice recognition security

Speech to speech translation




BLOCK DIAGRAM

MIC

VO ICE

RECOGNITIO N

IC

MICROCON T

ROLLER

DRIVER

CIRCUIT

RIGHT

MOTOR

BATTERY

CHARGERBATTERY

LEFT

MOTOR

DRIVER

CIRCUIT

DIRECTION

CONTROL

RESET

#=T>R0AC>S 6S>D:

>m!edded controller AT1' controller

+3& ?CD #nterfacing.

<oice recognition #C $%&''(

Bu))er interface

?&*@D driver interface

DC motors

S 0T9AR>S 6S>D

A Cross compiler for compiling and lin7ing the code written for 1' C =TR ??>R.




Serial communication software for downloading code to AT1' .

perating system: 9indows 35.

121.voice controlled robo

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