DR.AMBEDKAR INSTITUTE OF TECHNOLOGYDepartment of Telecommunication Engineering

2015-2016

HARISHA AV [1DA12TE014] NAUMAN KA[1DA12TE026]

PREKSHA B VIRUPAKSHA [1DA12TE036]SYED SALEEM AHMED [1DA12TE053]

GUIDED BYMrs. Vidya HonguntikarAssociate Professor Dr. Ambedkar Institute Of Technology Bangalore

Introduction A disabled person is enabled to move around independently using a mobile

touch screen and a voice recognition which is interfaced with motors through microcontroller.

When the direction is to be changed, the mobile touch screen sends a data through Bluetooth to direct the user to required destination .

This can also be controlled through simple voice commands using voice controller.

Implementation of GSM technology in Medical applications .

Objective Providing independent, productive and enjoyable living for

physically challenged people by the use of voice and touch screen operated wheelchair.

The goal of this smart wheelchair project is to enhance an ordinary powered wheelchair using sensors to perceive the wheelchair's surroundings, a speech interface to interpret commands.

Intelligent wheelchair will play an important role in the future welfare society. The use of intelligent wheelchair encourages the view of the machine as a partner rather than as a tool

Implementation of infrared sensor which is used to sense the obstacles coming in path of robot.

Continued…

Voice Operated Wheelchair

Existing system  When the voice is detected, the wheelchair can be

controlled to move in that direction by giving commands to the wheelchair.

The electrical signals are transferred to these motors using some hardware ports, called the communication ports.

Voice Operated Wheelchair

Few patients such as quadriplegics’ and multiple sclerosis type cannot drive joystick operated powered wheelchair

they are dependent on other people or helpers to move from one place to another and in such a way they don’t have the freedom of mobility.

This powered wheelchair motor control and drive system which consists of microcontroller and DC motors

The voice recognition system is used to detect and recognizes the patient’s voice and its output in the digital form will be sent to microcontroller

ARDUINO

Inexpensive

Cross-platform

Open source and extensible software

Simple, clear programming environment

Open source and extensible hardware

   

• Micro-controller

• GSM module

• Distance Sensor

• Heart Beat Sensor

 

 

Continued…

Temperature Sensor

Motors

Drivers

Easy VR Module

Continued…The Arduino Uno is a microcontroller board based on

the ATmega328. It has 14 digital input/output pins 6 analog inputs, a 16 MHz crystal oscillator, a USB connection, a power jack, an ICSP header, and a reset button.

The SIM900 is a complete Quad-band GSM/GPRS solution in an SMT module which can be embedded in the customer applications. Featuring an industry-standard interface, the SIM900 delivers GSM/GPRS 850/900/1800/1900MHz performance for voice, SMS, Data, and Fax in a small form factor and with low power consumption.

A DC motor is any of a class of electrical machines that converts direct current electrical power into mechanical power.

A simple DC motor has a stationary set of magnets in the stator and an armature with one more windings of insulated wire wrapped around a soft iron core that concentrates the magnetic field.

A light-emitting diode (LED) is a two-lead semiconductor light source. It is a pn-junction diode, which emits light when activated.

Heart beat sensor measures the Heart beat of a person. Heart rate can vary as the body's need to absorb oxygen and excrete carbon dioxide changes during exercise or sleep.

The HC-SR04 ultrasonic sensor uses sonar to determine distance to an object like bats do. It offers excellent non-contact range detection with high accuracy and stable readings in an easy-to-use package. From 2cm to 400 cm

 A buzzer or beeper is an audio signaling device, which may be mechanical, electromechanical, or piezoelectric.

The L293D motor driver is available for providing User with ease and user friendly interfacing for embedded application.

The Temperature sensors are precision integrated-circuit temperature devices with an output voltage linearly-proportional to the Centigrade temperature.

Embedded C

Embedded C is a set of language extensions for the C Programming language by the C Standards committee to address commonality issues that exist between C extensions for different embedded systems.

Embedded C includes number of features not available in normal C, such as, fixed-point arithmetic, named address spaces, and basic I/O hardware addressing.

Embedded C uses most of the syntax and semantics of standard C, e.g., main () function, variable definition, data-type declaration, conditional statements (if, switch, case), loops (while, for), functions, arrays and strings, structures and union, bit operations, macros, etc.

Advantages of Embedded C

It is small and simpler to learn, understand, program and debug.

It is fairly efficientC compilers are available for almost all

embedded devices in use today.Compared to assembly language, C code

written is more reliable and scalable, more portable between different platforms.

It supports access to I/O and provides ease of management of large embedded projects.

AdvantagesInput can be changed rapidlyAutomated operationMore reliableUser friendlyReduce man powerLess wiring because of BluetoothVery easy to use

Disadvantages

It has an operating range of 10 meters.RFID technology is often expensive.Even the best speech recognition system

sometimes make errors.

ApplicationsHospitals

Home

The wheel chair can also be operated by blind people

Can be operated by the handicapped person itself

Ability to provide sufficient risk management

Obstacles in the way of wheelchair are detected and avoided using IR sensors

Conclusion The motor drive and control system of the prototype

intelligent wheelchair has been presented.

The proposed voice & touchscreen operated intelligent wheelchair would bring more convenience for the disabled people.

The technology can also enhance safety for users who use ordinary joystick-controlled powered wheelchairs, by preventing collisions with walls, fixed objects, furniture and other people.

Future ScopeTo make the present touch screen feasible to all

classes of disabled, particularly for the blind, the touchscreen can be made Braille so that the blind person can feel the touch pad and operate the wheelchair accordingly.

The touchscreen in the present prototype has keys as the input mode. Also, the wheelchair can be controlled by the user himself through voice recognition.

The range of sensing can be further increased by using high accuracy ultrasonic sensors.

To save energy, the energy from the motion of the wheels can stored in a battery and made use whenever necessary.