Assisting Blind Persons using GPS
and GSM
Various scales have been developed to describe the extent of vision loss and define blindness. Total
blindness is the complete lack of form and visual light perception and is
clinically recorded as NLP, an abbreviation for "no light
perception."[1] Blindness is frequently used to describe severe visual impairment with residual vision. Those described as having
only light perception have no more sight than the ability to tell light from
dark and the general direction of a light source.
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WALKING STICK FOR BLIND
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Many people with serious visual
impairments can travel independently, using a wide range of tools and
techniques. Orientation and mobility specialists are professionals who are
specifically trained to teach people with visual impairments how to travel
safely, confidently, and independently in the home and the community. These
professionals can also help blind people to practice travelling on specific
routes which they may use often, such as the route from one's house to a
convenience store. Becoming familiar with an environment or route can make it
much easier for a blind person to navigate successfully.
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WALKING STICK FOR BLIND WITH VOICE OUTPUT
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Traditional
Tools such as the white cane with a red tip - the international symbol of blindness - may also be
used to improve mobility. A long cane is used to extend the user's range of
touch sensation. It is usually swung in a low sweeping motion, across the
intended path of travel, to detect obstacles. However, techniques for cane
travel can vary depending on the user and/or the situation. Some visually
impaired persons do not carry these kinds of canes, opting instead for the
shorter, lighter identification (ID) cane. Still
others require a support cane. The
choice depends on the individual's vision, motivation, and other factors.
Proposed
Idea:
Our idea is to assist blind people
using GPS and GSM mobility aid. We can construct a embedded unit which can
assist blind people by giving intimation to the family members about the
persons location periodically. This can also be done incase of any obstacles
detection.
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BLIND NAVIGATION USING PIR&ULTRASONIC
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Operation:
The user
will carry a embedded unit which comprises of a obstacle and vibration sensor.
When a obstacle is detected the microcontroller gets the present position using
GPS and sends that information to a remote mobile phone as an SMS Message.. So
that the family members can know the exact position of the blind person. The
unit has an option to send this information periodically so that, the family
members can track the blind person’s movement.
Power Supply
Provides +5VDC and +12VDC power supply for the IC’s and the
sensors for its proper operation
Dspi30F4013
Microcontroller
Microchip's newest dsPIC® Digital
Signal Controller (DSC) and PIC24 MCUs offer the performance speed of 40
million instructions per second (MIPS), selfprogramming capabilities via Flash
memory and industrial and extended temperature ranges. This IC severs as a CPU
for the whole system.
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WALKING STICK FOR DIFFERRENT MODEL
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Ultrasonic Sensor
Obstacle sensor
(ultrasonic Sensors) is used to detect any obstacles in the path converts that
into electrical signal and it is connected to the dsPIC Microcontroller.
Vibration Sensor
Vibration sensor is used to detect
any Vibrations and converts that into electrical signal and it is connected to
the dsPIC Microcontroller.
GPS Receiver
ProGin SR-92 is a low-power,
ultra-high performance, easy to use GPS smart antenna module based on SiRF’s
third generation single chip. Its low
power consumption and high performance enables the adoption of handheld
applications. The slim design allows SR-92 to be placed on top side of the
housing to have best GPS signal reception. The 5-pin I/O interface is then
connected to the main board with either connector or wire soldering.
GSM MODEM
SIM900 is
used as a GSM modem and is used to send SMS Messages to the remotely located
Monitoring unit.
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MAASTECH
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