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Smart cap for visually impired people

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Radhika Sojitra

on 18 December 2014

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Transcript of Smart cap for visually impired people

Smart Cap for Visually Impaired People
Prepared By:
Radhika Sojitra (110570111003)
Krishna Mandanka (110570111006)
FOE - EC (7 th sem)
MEFGI , Rajkot.

Guided By:
Prof. Anurag Lakhlani
Head of the Department,
MEFGI , Rajkot.


Contents
Precise project Definition
Motivation
Literature survey
Summary of best 3 patents related to our project.
Identification and selection of major components, Protocol and Methodology
Development environment (Software or Hardware platform)
Tentative Plan
Conclusion
References
Precise project Definition
To prepare a smart cap for blind which can detect obstacles and alert them.
Motivation
Literature Survay
Summary of 3 patents related to project
Three patents are as following :

1. US Patent :-
Intelligent walking stick (US 5973618 A)

2. Chinese Patent :-
Road obstacle detection system (CN 202512240 U)

3. US Patent :-
Ultrasonic path guidance for visually impaired
(US 6671226 B1)


1. Intelligent walking stick
Continue...
www.itsmyview.com
Continue...
This safety mechanism consists...
Processor
Transmitter
Receiver
Outside image sensor or scanner
Audible warning device
The present invention relates to...
Collision avoidance
Traffic control
Incident detection & management
Interactive voice response communications
2.Road obstacle detection system
Continue...
www.mid-day.com
Continue...
Aim
: The invention aims to overcome the deficiencies in the prior art
to provide a dedicated blind.

Summary
:
This device includes...
Microcontroller
Sensor
Alarm
Switch unit

Advantages:
Simple structure
Safe use
Convenience
The security of waling of the blind is raised.

3. Ultrasonic path guidence for visually
impaired people
Continue...
Here is the bock diagram of this system...
Continue...
This system uses array of ultrasound directional transmitter.

The transmitters are positioned on the torso of the individual user.

Ultrasound transmitter emits the ultrasound pulse.

one or more receivers detect echoes from obstacles.

Audible tone is generated each time an echo is received.

The tone's frequency is dependent on which transmitter
transmitted the original ultrasound pulse.

Selection of major component
There are mainly three components...

1. Microcontroller (ATmega328p)



2. Ultrasonioc sensor



3. Buzzer







1. ATmega328P
electronics.stackexchange.com
www.sunrom.com
www.nkcelectronics.com
www.tandyonline.co.uk
Features of ATmega328P

28-pin AVR Microcontroller
8 bit microcontroller
Flash Program Memory : 32 kbytes
EEPROM Data Memory : 1 kbytes
SRAM Data Memory : 2 kbytes
I/O Pins : 23
Timers : Two 8-bit / One 16-bit
A/D Converter : 10-bit Six Channel
PWM : Six Channels
RTC : Yes with SeparateOscillator
External Oscillator : up to 20MHz
2. Ultrasonic Sensor
Generally called transducer but when it send and receive both then it is called transceivers.

Working :
Ultrasonic sensors depend on two separate devices: an ultrasonic transducer and a detector.

Ultrasonic transducer converts energy into an ultrasonic frequency.

Detector produces a voltage when an ultrasonic frequency comes in contact with it.

Types of Ultrasonic sensor :
Proximity Sensor
Ranging Sensor
Continue...
Model of the Ultrasonic sensor used :
Model number: HC-SR04

Features :
Minimum range 10 centimeters
Maximum range 400 centimeters (4 Meters)
Measuring angle:15 degree
5V DC Supply voltage
Modulated at 40 kHz
3. Buzzer
A buzzer or beeper is an audio signalling device.

It may be mechanical, electromechanical, or piezoelectric.

It works on electromagnetic principle.


Uses
: Alarm devices
Timers
Mouse click or keystroke.

Types of Buzzer :
Electronic Buzzer
Magnetic Buzzer
Mechanical Buzzer
Piezo Buzzer
Methodology
Study of Arduino

Study of Ultrasonic Sensors

Study of interfacing of audio device with arduino

Designing of the Cap
Software Platform
Developer : Arduino Software

Language : Embedded C

Type : Integrate Development Environment

Website : www.arduino.cc
Hardware Platform
Arduino:
Introduced in 2005

single board microcontroller

Open source Hardware

Consists of atmel 8 bit AVR microcontroller

Convinient power management

Easy USB Interface

16 MHz clock frequency
Tentitive plan
Study about transmitter and receiver circuit for ultrasonic sensor.

Study about arduino interfacing.

Study on arduino software and programming
Conclusion
By working on this project we came to know about working of components specially Arduino hardware and software and we get information of patents related to our project.
D. Dakopoulos and N. G. Bourbakis, “Wearable obstacle avoidance electronic travel aids for blind: a survey,” IEEE Transactions on Systems, Man and Cybernetics C, vol. 40, no. 1, pp. 25–35, 2010. View at Publisher · View at Google Scholar · View at Scopus

A Smart Infrared Microcontroller-Based Blind Guidance System.
(www.hindawi.com)

Safety guard for blind people
(www.electronicsproject.org)
IIT-Delhi creates affordable 'smart' cane for the blind
Students and fellows at IIT-Delhi have developed a ‘smart’ cane that helps the blind navigate their way without having to touch or run into obstacles.
Its cost is 3000Rs.

Around 50 of these devices will be
distributed today to the disabled at
St Xavier’s College, free of cost
Source:www.mid-day.com
Comparison of Atmega328P with Other Microcontroller
Source:www.google.com/patents/US5973618
Source:www.google.com/patents/US5973618
Source:www.google.com/patents/CN202512240U
Source:www.google.com/patents/CN202512240U
Source:www.atmel.com/devices/atmega328
Source:www.atmel.com/devices
Source: grietinfo.in/projects/MAIN/ECE2013
Source: grietinfo.in/projects/MAIN/ECE2013

Source: www.google.com/patents/US667126 B1
Source: www.en.wikipedia.org/wiki/buzzer
Source: www.en.wikipedia.org/wiki/arduino
Questions
?

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