DIRECTION CONTROLLED WHEEL CHAIR FOR PHYSICALLY DIRECTION CONTROLLED WHEEL CHAIR FOR PHYSICALLY DISABLED BASED ON VOICE AND RF MODULEDISABLED BASED ON VOICE AND RF MODULE

PROJECT SUPERVISORMr.S.Sundar(Assistant Professor)

PRESENTED BYJ.JEGADEESH(121EE505)S.JAGADEESH(111EE133)V.SURENDAR(121EE524)

Project Phase -2

ABSTRACT

This Project describes an intelligent motorized wheel chair for physically disabled person using voice control and by RF module. It enables a disabled person to move around independently using a voice recognition application which is interfaced with motors through microcontroller.

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INTRODUCTION

This work includes the wheelchair that can be controlled by using voice and switch and it monitors the body temperature of the disabled person.

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PROBLEM IDENTIFICATION

The present world the medical field gives very much importance in taking care of the patients, and the patient/ handicapped one are like to live individually without the help of any others .so, this proposed product will be very effective for them.

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OBJECTIVE

To design a working model that could help the physically disabled persons and to make a system that monitors the health condition of patient.

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BLOCK DIAGRAM OF PROPOSED WORK

MICROPHONE

VOICE RECOGNITION

KIT

RF MODULE

PIC CONTROLLER

IR OBSTACLE SENSOR

POWER SUPPLY RELAY 1

RELAY 2

TEMP SENSOR

MOTOR 1

MOTOR 2

LCD DISPALY

DESIGN AND DEVELOPMENT

The wheel chair is controlled by voice recognition module and the vehicle is also controlled from a short distance through RF module.

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CIRCUIT DIAGRAM

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HARDWARE COMPONENTS

PIC 16F877A VOICE RECOGNITION HM2007 KIT POWER SUPPLY RF MODULE IR OBSTACLE SENSOR LCD DISPLAY TEMPERATURE SENSOR RELAY DC GEAR MOTOR

MICROCONTROLLER PIC 16F877A

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FEATURES

It is an 8bit microcontroller. 35 input/output pins 368 bytes RAM memory A/D converter

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HM2007-VOICE RECOGNITION LSI KIT

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MICROPHONE

The human ear has an auditory range from 10 to 15,000 Hz. Microphones are transducers which detect sound signals and produce an electrical signal.

Microphone takes the analog voice commands and sends it to voice recognition chip HM 2007.

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FEATURES

The HM2007 is a CMOS voice recognition LSI circuit. The chip contains voice analysis, regulation, and system control functions. The main features are speech recognition circuit, maximum 40 word recognition, microphone support, response time is less than 300 milliseconds.

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User programmable, Up to 20 word vocabulary of duration two second,non-volatile memory back up with 3V battery onboard, which keep the speech recognition data in memory even after power off.

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RF MODULE

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RF MODULE

*An RF module (radio frequency module) is a (usually) small electronic device used to transmit and/or receive radio signals between two devices.*RF communications incorporate a transmitter and a receiver.

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RF TRANSMITTER

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RF RECEIVER

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SENSORS

And for checking body condition and movement of the patient different sensors such as temperature, obstacle sensor(IR)are used.

The results of sensors are displayed in the LCD.

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SENSORS –Temperature sensor

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The TMP35/TMP36/TMP37 are low voltage, precision centigrade temperature sensors. They provide a voltage output that is linearly proportional to the Celsius (centigrade) temperature

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Detecting Obstacle with IR (Infrared) Sensor

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TEMPERATURE SENSOR AND IR SENSOR

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RELAY DRIVER CIRCUIT

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OVERALL PROJECT MODEL

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HARDWARE IMPLEMENTATION

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CONCLUSION

The direction of the wheelchair can be selected using the specified voice commands or switch. This project has many advantages like safety, comfort, energy saving, etc. Thus a trained voice is only needed to ride the wheelchair.

FURTHER DEVELOPMENT

Further the project can be developed by using a heart beat analyzer sensor to sense the heart beat of the patient. When heart beat is crossing the threshold value SMS is sent to the concern person/doctor via GSM. The short range controlling of wheel chair is also possible via zigbee. We can implement our project on PCB and output can be obtained.

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REFERENCES

[1]. A. AnandKumar “BasicFundamentals of Digital Circuits” Second Ed. PHI Learning.

[2]. Neamen“Electronic Circuits – Analysis & Design” McGraw Hill.

[3]. Millman J. &Taub H., “Pulse, Digital & Switching Waveforms” Tata McGraw Hill

[4]. Simon Haykin, “Communication Systems”Wiley India, New Delhi, 4Ed. 2008