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Smart cap for visually impired people
Transcript of Smart cap for visually impired people
Radhika Sojitra (110570111003)
Krishna Mandanka (110570111006)
FOE - EC (7 th sem)
MEFGI , Rajkot.
Prof. Anurag Lakhlani
Head of the Department,
MEFGI , Rajkot.
Precise project Definition
Summary of best 3 patents related to our project.
Identification and selection of major components, Protocol and Methodology
Development environment (Software or Hardware platform)
Precise project Definition
To prepare a smart cap for blind which can detect obstacles and alert them.
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
This safety mechanism consists...
Outside image sensor or scanner
Audible warning device
The present invention relates to...
Incident detection & management
Interactive voice response communications
2.Road obstacle detection system
: The invention aims to overcome the deficiencies in the prior art
to provide a dedicated blind.
This device includes...
The security of waling of the blind is raised.
3. Ultrasonic path guidence for visually
Here is the bock diagram of this system...
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
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.
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 :
Model of the Ultrasonic sensor used :
Model number: HC-SR04
Minimum range 10 centimeters
Maximum range 400 centimeters (4 Meters)
Measuring angle:15 degree
5V DC Supply voltage
Modulated at 40 kHz
A buzzer or beeper is an audio signalling device.
It may be mechanical, electromechanical, or piezoelectric.
It works on electromagnetic principle.
: Alarm devices
Mouse click or keystroke.
Types of Buzzer :
Study of Arduino
Study of Ultrasonic Sensors
Study of interfacing of audio device with arduino
Designing of the Cap
Developer : Arduino Software
Language : Embedded C
Type : Integrate Development Environment
Website : www.arduino.cc
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
Study about transmitter and receiver circuit for ultrasonic sensor.
Study about arduino interfacing.
Study on arduino software and programming
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.
Safety guard for blind people
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
Comparison of Atmega328P with Other Microcontroller
Source: www.google.com/patents/US667126 B1