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By:-

MAHENDRA JALAAKSHAY KOLI

SAGAR SHINDE

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IntroductionVoice Controlled Robot (VCR) is a mobile

robot whose motions can be controlled by theuser by giving specific voice commands. Thespeech recognition software running on a PC .

Software is capable of identifying the 5 voicecommands Run, Stop, Left, Right and

Back issued by a particular user.After processing the speech, the necessary

motion instructions are given to the mobileplatform via a RF link.

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Computer

Sapi and

VisualBasic

software

SpeechInput

throughMicrophon

e

User interface with PC is provided by meansof Microphone. When user gives somecommand for Robot navigation viamicrophone, sapi software which works asadd-on with Visual Basic program, decodesand recognizes the speech and decoded datais transferred to Visual Basic program.

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Computer

Sapi and

VisualBasic

software

SpeechInput

throughMicrophon

e

Visual Basic Program compares receivedcommand with Forward, Backward, Left Turnand Right Turn or Stop Command.

Visual Basic command then outputscorresponding command on parallel port ofPC.

ParallelPort

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The Parallel port or line printer terminal isfound commonly on the back of a PC as a D-

Type 25 Pin female connector.

The port is composed of 4 control lines, 5status lines and 8 data lines.

The original parallel port is a bundle of threeports namely, data port, status port, and

control port.

Each of the Data, Status, and the Controlport have specific addresses assigned to them.

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We are using DB25 connector for parallel port.Pins 2 through 9 form the 8-bit data output port.Pins 1, 14, 16, and 17 form the control port which iscapable of reading/writing.

Pins 10 through 13 and Pin 15 together form thestatus port.

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Computer

Sapi and

VisualBasic

software

SpeechInput

throughMicrophon

e

Opto coupler is used for avoiding anyelectrical damages to parallel port in case ifsome problem occurs with the connectedcircuit.

ParallelPort

Optocoupler

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Computer

Sapi and

VisualBasic

software

SpeechInput

throughMicrophon

e

RF encoder will encode commands needs to

be transmitted.

ParallelPort

Optocoupler

433MHZRF

encoder

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Computer

Sapi and

VisualBasic

software

SpeechInput

throughMicrophon

e

Encoded signals are transmitted by RF

transmitter via antenna. 433MHz is a free RFband available for experimental purpose.

ParallelPort

Optocoupler

433MHZRF

encoder

433MHZRF

Transmitter

Antenna

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Antenna AtRobot

433MHZRFReceiver

433MHZRFdecoder

While antenna at robot receives RFtransmitted command and RF decoderdecodes the command which is directly given

to motor driver circuit.

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Antenna AtRobot

433MHZRFReceiver

433MHZRFdecoder

MotorDrivingCircuit

DC Motorfor

navigation

RobotNavigationMotor driver circuit output is used to drive

DC motors for Robot navigation.

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The system requirement for this application can bebroadly categorized under two headings namely-

Hardware Requirements

Software requirements

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Processor: Pentium 1/ Pentium II / Pentium III /Pentium IV.

Memory : 32 MB Ram (Minimum)Resolution: 800 x 600 pixels.

Electronic wireless interface circuit-Opto coupler--433MHz transmitter / receiver module--Relay

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Software Requirements:

Platform : Any Operating System.

Language: JAVA

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Advised

Dont speak to fast but also not to slowly

Speak clearly

Dont speak too close to the microphone. 30-

50 cm is a good distance.

Try to speak with a good English accent.

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Advantages:-

Can be used for distance control of the robotwith the help of speech only.

Controlling machines via typing a commandor clicking with mouse is very common way todo tasks while here we are presenting a newway to control things.

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Future scope:-

Robot voice response feedback can also beimplemented.

We can also use this type of robot in militarywhich is to identified the target or terroristsposition by using infrared camera.

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Conclusion

The voice recognition software has anaccuracy around 75% in correctly identifying avoice command.

But it is highly sensitive to the surroundingnoises. There is a possibility of misinterpretingsome noises as one of the voice commands

given to the robot.

Also the accuracy of word recognitionreduces in face of the noise. The sound

coming from motors has a significant

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RERERENCES

C.Breazeal Emotive Qualities in Robot Speech

www.google.com

www.wikipedia.com

http://www.google.com/http://www.wikipedia.com/http://www.wikipedia.com/http://www.google.com/

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