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    Motorized Wheelchair (Joystick and Head Controlled) : Project On

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    LokeshRathor
    This document summarizes a project to develop a motorized wheelchair that can be controlled either through a joystick or head movements. The wheelchair is intended to help people with higher degrees of impairment who cannot use their hands. It uses an accelerometer and microcontroller to translate head tilts into signals that control the wheelchair's movement and direction. The system is designed to be low-cost and provide greater mobility and independence to users. Initial testing showed it allowed collision-free navigation with only brief training. Future work involves further evaluation with actual patients to refine the design.

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    Motorized Wheelchair (Joystick and Head Controlled) : Project On

    Uploaded by

    LokeshRathor
    60 views18 pages
    This document summarizes a project to develop a motorized wheelchair that can be controlled either through a joystick or head movements. The wheelchair is intended to help people with higher degrees of impairment who cannot use their hands. It uses an accelerometer and microcontroller to translate head tilts into signals that control the wheelchair's movement and direction. The system is designed to be low-cost and provide greater mobility and independence to users. Initial testing showed it allowed collision-free navigation with only brief training. Future work involves further evaluation with actual patients to refine the design.

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    This document summarizes a project to develop a motorized wheelchair that can be controlled either through a joystick or head movements. The wheelchair is intended to help people with higher degrees of impairment who cannot use their hands. It uses an accelerometer and microcontroller to translate head tilts into signals that control the wheelchair's movement and direction. The system is designed to be low-cost and provide greater mobility and independence to users. Initial testing showed it allowed collision-free navigation with only brief training. Future work involves further evaluation with actual patients to refine the design.

    Copyright:

    © All Rights Reserved
    Download as PPTX, PDF, TXT or read online from Scribd
    Download as pptx, pdf, or txt
    60 views18 pages

    Motorized Wheelchair (Joystick and Head Controlled) : Project On

    Uploaded by

    LokeshRathor
    This document summarizes a project to develop a motorized wheelchair that can be controlled either through a joystick or head movements. The wheelchair is intended to help people with higher degrees of impairment who cannot use their hands. It uses an accelerometer and microcontroller to translate head tilts into signals that control the wheelchair's movement and direction. The system is designed to be low-cost and provide greater mobility and independence to users. Initial testing showed it allowed collision-free navigation with only brief training. Future work involves further evaluation with actual patients to refine the design.

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    MALWA INSTITUTE OF

    SCIENCE OF
    TECHNOLOGY
    Project On
    Motorized Wheelchair ( joystick and Head controlled )

    Submitted by:-
    Guided by:- Rajendra Chouhan
    Chetan joshi
    Mr. Jayant Rampurkar Sumit Panday
    Paramjeet singh yadav
    (Assistant professor Satayam Khade
    Jitendra Chouhan
    Abstract

    Electric wheelchairs are designed to aid Handicap (paraplegics).


    Unfortunately, these can not be used by persons with higher degree of
    impairment, such as paraplegics, i.e. persons that, due to age or illness
    , can not move any of the body parts, except of the head. Medical
    devices designed to help them are very complicated, rare and costly.
    In our project a microcontroller system enabled the head and
    neck mobility of paraplegics in a cost effective manner .
    The system uses electronic and mechanic components. A head motion
    recognition technique based on accelerometer data processing is
    designed. The wheelchair joystick is controlled by the systems
    mechanical actuator. The system can be used with several different
    types of standard electric wheelchairs. It is tested and verified through
    an experiment performed by our group members.
    Objective

    To construct a simple and cost effective transport device a


    Motorized Wheelchair ( joystick and Head controlled)
    for physically disabled people.
    Introduction
    The number of people moving around the world with the help of artificial means due
    to illness or accident is increasing very fast. Their quality of life has to be enhanced
    by using simple and cost effective transport devices. Todays technology has shifted
    to automation which minimizing the need of human intervention. These automated
    systems have less manual operations with high reliability and accuracy. Intelligent
    wheel chairs are very much helpful for many handicapped people who have
    difficulties in driving mechanical wheel chairs. Persons with high degree of
    impairment such as Handicap (quadriplegics) are not able to drive electric wheel
    chairs. Medical devices designed to help such persons are very much complicated and
    expensive. So, a microcontroller based system that enables wheel chair movement by
    head motion is introduced. The system describes a wheel chair for physically disabled
    people which use head motion and MEMS sensor interfaced with DC motor. MEMS
    sensor is a micro electronic mechanical sensor which effectively translated head
    movements into computer interpreted signals. The accelerometer data is calibrated for
    motion recognition.
    Literature Review
    Principle of working

    There are many different ways to make an accelerometer. Some accelerometers use
    the Handicap (piezoelectric) effect - they contain microscopic crystal structures that
    get stressed by accelerative forces, which causes a voltage to be generated. In this
    project we use the voltage based accelerometer
    By measuring the amount of static acceleration due to gravity, you can find out the
    angle the device is tilted at with respect to the earth. By sensing the amount of
    dynamic acceleration, you can analyze the way the device is moving.

    This tilt with respect to the earth can be used to run the motor of a wheelchair For
    example if the tilt is to the left side then the wheel chair moves in left direction.
    Wheel chair movement can be controlled in Forward, Reverse, Left and Right
    direction along with obstacle detection using MEMS sensor.
    Block Diagram

    DC
    MOTOR 1
    MOTION
    SENSOR

    MICRO
    CONTROLLER DRIVER

    SERIAL INTERFACE

    DC
    MOTOR 2
    Part Used

    Wheel
    chair
    Part Used

    Wheel
    Part Used

    DC Motor

    - 12
    Volt
    motor
    Part Used
    Circuit
    Part Used

    Battery

    - 12 Volt
    - 7.5 AH
    Advantages

    Easy to operate
    Suitable for handicapped people
    Superior level of sensitivity
    Better shock resistivity
    Applications
    This electric Wheelchair along with MEMS Accelerometer can be used
    by a paralyzed and Paraplegic or immobilized person to let them move
    from one place to another to carry out there lifestyle
    It can be also be used by hospitals for the transportation of
    patent between rooms which can reduce the hospital staff

    The production cost is less therefore it can be easily affordable


    by lower and middle class section

    It can also be used to modified a mechanical wheelchair into an


    electrical wheelchair with MEMS and joystick controller by
    installation of very few parts .
    Cost Analysis
    COMPONENT Cost
    Wheelchair 5000
    Wheel 210
    DC Motor 1 650
    DC Motor 2 650
    Battery 750
    Transformer 100
    Relay 100
    ULN ( Relay Driver IC ) 50
    Rocker Switch 80
    (Display) LCD 220
    (Controller) ATMEa328 210
    MEMS Accelerometer(sensor) 500

    Power Supply 110


    TOTAL 8650/-
    Future Scope
    Conclusion & Future Planning
    The first important issue is that almost all subjects were
    able to navigate the wheelchair quite well after a minimal
    training phase of no more than five minutes. Even if the
    average time of travel and the driven distance increased
    for test runs incorporating driving assistance, the number of
    collisions dropping to zero argues for this support, especially
    for untrained operators. The increase in travel time and driven
    distance is only significant in tight navigation situations
    as in our experiment. In situations without obstacles, both
    measures are not impeded by the assistance module. Hence,
    in normal situations the advantage of collision-free driving
    remains, while the drawbacks nearly disappear.
    The experiments reported in this project were conducted
    with healthy subjects. During the next months, the evaluation
    will be repeated with real users at the CHL & M.Y Hospital in
    Indore
    Thank you

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