Patient Helper Without Vid

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PATIENT HELPER

By: GUIDED BY:FARZAD TAHERI SRI T.G.GIRIKUMARPARTH RANJAN SINGH Professor, EEE DeptPRATHI SHASTRY M.S.R.I.T, Bangalore

JAGADISH D KINI


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INTRODUCTION


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A person suffering from paralysis orany other injury has to always relyon a helper.

He cannot move around to performroutine tasks like switching on/off a

fan , tube light etc.

Our project aims at providing a

solution to the same.


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Appliances can be turned on and offand light dimmer functions can alsobe achieved by simply bending his

fingers.

Our project also includes amechanism to control wheelchairmotion.


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Glance at components used:

Flex sensor

Arduino package with ATmega 168

microcontroller Xbee wireless module

Relays

H-bridge

Stepper Motor


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PROJECT

DESIGN


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Input Module

CommunicationModule

OutputModule


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Block Diagram

FlexSensor

Microcontroller

ZigBeeTx

ZigBeeRx

Microcontroller

RelaysHomeApplianc

es

Wheelchair

H-Bridge


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Input Module


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Circuit Diagram


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Communication Module


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Output Module

Wheel chair navigation control:

q H BRIDGE

It is an electronic circuit that enables a voltage to beapplied across a load in either direction.

These circuits are often used in robotics and otherapplications to allow DC motors to run forward and

backward.


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Switches ON Motor Status DenotedAs State

S1 and S4 Forward 1

S3 and S2 Reverse 2

S1 and S3 Brake 0

S2 and S4 Brake 0


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The L293D is designed to provide bidirectional drivecurrents of up to 600-mA at voltages from 4.5 V to36 V Motor 1 StateMotor 2 State Wheel Chair

Motion

Assigned to

finger

0 1 Left Turn Ring

1 0 Right Turn Little

1 1 Forward Index

2 2 Backward Middle


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DC MOTOR

q It is an electric motor that runs on direct current (DC)electricity. DC motors can operate directly from rechargeable

batteries.

q1000RPM 12V DC Geared Motors For Robotics Applications

q Very Easy To Use And Available In Standard Size.

q 5kgcm Torque

q No-Load Current = 60 MA(Max), Load Current = 300 MA(Max)


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Home appliance control :

q Relays

A relay is a switch which is operated by electricity

It is usually electromagnetic device

When a small trigger voltage is applied to a relay,power supply to the device is switched on

When the trigger voltage is removed, the power supplyfor the device is also cut off

Some relays can be triggered directly by amicrocontroller output


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Advantages of Relays:

It can be used to turn on and off appliances with triggerpulses from the microcontroller

Can be used to switch for higher current than amicrocontroller can produce

Provides electrical insulation to the sensitive components


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Advantages of Patient

Helper:

No need for a person to remain with the patient

at all times

Easy to use


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Additional functions can be added easily.

Zigbee covers more distance compared to

transmission using IR rays (which is used insome remote controls)

The existing wheel chair control systems aredifficult to use and master.


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Future Work

Communication module needs to beconfigured, installed and

programmed

The Output module of control ofappliances using relays needs to besetup


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REFERENCES

q Towards a Body Sensor Network -based gesture interface for

intelligent home applications datedAUG 2009

q V-ris Jaijongrak ; Chantasuban, S. ; Thiemjarus, S. ; School of Information, Computer& Communication Technolgy (ICT), Thammasat Univ., Pathum Thani, Thailand ,

q Design and development of a hand-glove controlled wheel chair datedMAY 2011

q Akmeliawati, R.; Tis, F.S.B.; Wani, U.J.; Dept. of Mechatronics Eng., Int.

Islamic Univ. Malaysia, Kuala Lumpur, Malaysia


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THANK YOU

Patient Helper Without Vid

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