“An Interactive Bus Alert & Convenient Communication System For Blind
People Using Gps & Rf”
M.Tech Student of JNTU, Kakinada, AP-India, greeshmakolluri @gmail.com
HOD, ECE Dept, JNTU, Kakinada, AP-India
Abstract-
recognition system, both the units the blind
“objective of this paper is helping the
passengers identifies and gives alert the bus it
blind/old persons travelling easy and illiterate
has to board. The microcontroller controls the
people as well as pedestrian people using an
system and the GPS module and the Speech
interactive
Sensor
recognizer that are used for required bus
Networks. The blind person in the bus station is
tracking the location and knowing the desired
identified with RF communication. The blind
location given by the passenger respectively. If
informs the location he needs through the
the location matches, then the voice synthesizer
microphone which is given to the voice
will notify the passenger via speaker connected
recognition system which produces the output of
to the passenger unit to get down at the desired
bus numbers in the voice synthesizer unit which
location. in addition to this gas sensor and fire
is heard in Speaker. Then this location is
sensor detects any fire and gas accidents in bus
transmitted to the transceiver in the bus. If the
and automatically controls the bus environment
names in the transceiver in the bus matches with
through actuators and gives alert to passengers’
that of the name send by the blind, then there is
inside the bus.”
embedded
Wireless
an alarm in the bus unit alerting the presence of
blind and a voice to the user's headset that the
particular bus has arrived. With the help of
GPS tracker connected with audio output the
Keywords: ARM7, EPIC, GPS, RFID technology,
Audio input & output, indication.
destination chosen by the blind is intimated
when the bus reaches the correct location.
1.INTRODUCTION:
The
project
sensor
One of the main reasons we are interested in
application with wireless communication (RF).
the design and desire to deploy this system are: In
The sensor based node is operated with the
addition to the facilities such as subway which are
micro
PIC
developed fairly complete, with sound and image
16F877A). The positioning is done by the
messages, camera network is very modern there, so
GPS(global positioning system).the blind person
that it is very well to support for people with
or older person he find the way by using GPS
disabilities, especially blind people. Another way
modem. The sensors indicate the free place in
the
bus section.
very convenient but the cost is so expensive, this is
controller
deals
with
(ARM7LPC2148,
blind
people
or
disable
people
not an advantage to blind people usually take taxi.
Two units namely the blind unit and the
For the bus – the transportation was developed long
bus unit consisting of different modules PIC
time with network was very complete. It is waste if
controller, voice synthesizer, and (voice) speech
blind people cannot join in bus traffic. For reasons
above we show a system: U-Bus system for the
research, design and deployment of this system is
Blind. This system is designed for the purpose to
absolutely necessary. The project aims in designing
transfer sound message of bus number which is
a system which is capable of alerting destination is
parked in front of the blind. So that this system can
reached. The explosion in wireless technology has
help blind people to recognize bus which blind
seen the emergence of many standards.
people want to take without the help of others.
With this system. Nowadays have many systems
2. EXISTING SYSTEM:
support blind people are researched and developed.
Not only simple applications such as Braille
No indication for blind people if any case the
keyboard for the blind the blind when crossing the
blind persons wants to go anywhere means they
street, but also complex systems such as car for the
have to choose taxi or with the help of any other
blind and so many other systems. Maybe the
persons. And no alert for blinds
practicality of the system needs some time but for
the purpose of the blind are closer to society, to
3. PROPOSED SYSTEM:
avoid the inferiority with society as well as
The main aim of the project is providing bus
information to the blind person. The person find
want to take when this bus stop in front of the
blind.
out the bus by using this system The position and
number of seats available inside the bus find out
through
some
special
sensors
and
In this approach gives Indication through
wireless
sensor about required bus arrived or not, is there
communication modules for information sensor
any seat available or not through Automatic
network.
operation using Wireless communication and
Position finding through GPS.
This
module
is
used
for
high
level
communication in personal area networks which
has low This displays the location and thus helps
the User to get down to the desired location power
and
low
voltage
wireless
applications..
Its
transmission distances are between 10-100 meters
line of sight. The bus receives the signal from User
person’s unit and the bus stops at bus station for
enabling
the
person
to
enter
the
bus.
Microcontroller PIC16F887: The PIC controller in
bus unit is used for the interfacing of the LCD
display. The bus receives bus number which is
required by the blind in RF communication area. It
will compare number with itself. And send back
user unit its number when it stop at the blind area.
The blind can hear number of the bus which they
5. Working Principle:
4. Block Diagram:
The blind with PDA (Integrated RFID tag)
BLIND SYSTEM
--------------------------------
go
to
Electromagnetic
field
of
BS.
The
blind can search destination and register the bus
number which they want to take to BS. One of
features of BS is RFID Reader, when the blind in
the
bind
area,
BS
will
announce exiting of blind people to them. Other
feature BS is transfer to buses number that the
blind want to take. The bus receives bus number
which
is
required
by
the
blind
in
RF
communication area. It will compare number with
itself. The blind can hear number of the bus which
they want to take when this bus stop in front of the
blind. The blind can easy to take the bus. The
working of the system includes two units: The bus
unit and the Blind unit.
-
-----------------------------
BUS UNIT
- - - - - - - - - - - -- - - - - - - - - - - - - - - - - - -
This
module
is
used
for
high
level
communication in personal area networks which
has
low
power
applications..
Its
and
low
voltage
transmission
wireless
distances
are
between 10-100 meters line of sight. in bus
receives the signal from User person’s unit and the
bus stops at bus station for enabling the person to
enter the bus.
Microcontroller PIC16F887: The
PIC controller in bus unit is used for the interfacing
of the LCD display. This displays the location and
thus helps the User to get down to the desired
location.
5.1. Blind Unit:
5.1.1 ARM 7 LPC2148:
LPC2148 microcontroller board based on
a 16-bit/32-bit ARM7TDMI-S CPU with real-time
- - - - - - - - - - - - - - - - - - -- - - -- - - - - - -
emulation and embedded trace support, that
combine microcontrollers with embedded highspeed flash memory ranging from 32 kB to 512 kB.
A 128-bit wide memory interface and unique
accelerator
architecture
enable
32-bit
code
debugging with the on-chip Real Monitor
execution at the maximum clock rate. For critical
software
code size applications, the alternative 16-bit Thumb
instruction execution.
mode reduces code by more than 30% with

and
high-speed
tracing
of
USB 2.0 Full-speed compliant device
minimal performance penalty. The meaning of LPC
controller with 2 kB of endpoint RAM. In
is Low Power Low Cost microcontroller. This is 32
addition, the LPC2148 provides 8 kB of
bit
on-chip RAM accessible to USB by
microcontroller
manufactured
by
Philips
semiconductors (NXP).
DMA.
Due to their tiny size and low power

One
or
two
(LPC2141/42
Vs,
consumption, LPC2148 is ideal for applications
LPC2144/46/48) 10-bit ADCs provide a
where miniaturization is a key requirement, such as
total
access control and point-of-sale.
conversion times as low as 2.44 ms per
of
6/14
analog
inputs,
with
channel.

Single 10-bit DAC provides variable
analog output (LPC2148 only)

Two 32-bit timers/external event counters
(with four capture and four compare
channels each), PWM unit (six outputs)
and watchdog.

Low power Real-Time Clock (RTC) with
independent power and 32 kHz clock
input

Multiple serial interfaces including two
UARTs (16C550), two Fast I2C-bus (400
kbit/s),SPI and SSP with buffering and
variable data length capabilities.


16-bit/32-bit
microcontroller

in
a
purpose I/O pins in a tiny LQFP64
tiny
package.
LQFP64
package.

Up to 21 external interrupt pins available.
8 kB to 40 kB of on-chip static RAM and

60 MHz maximum CPU clock available
32 kB to 512 kB of on-chip flash memory;
from programmable on-chip
128-bit wide interface/accelerator enables
high-speed 60 MHz operation.

Up to 45 of 5 V tolerant fast general
ARM7TDMI-S
In-System
with settling time of 100 ms.

Programming/In-Application
Embedded Trace interfaces offer real-time
to 25
MHz and Power saving modes include
loader software, single flash sector or full
256 B in 1 ms Embedded ICE RT and
On-chip integrated oscillator operates with
an external crystal from 1 MHz
Programming (ISP/IAP) via on-chip boot
chip erase in 400 ms and programming of
PLL
Idle and Power-down

Individual enable/disable of peripheral
functions as well as peripheral clock
scaling for additional power optimization.

Processor wake-up from Power-down
5.2 Bus Unit:
mode via external interrupt or BOD.

CPU operating voltage range of 3.0 V to
5.2.1 PIC 16F877A Microcontroller:
3.6 V (3.3 V ± 10 %) with 5 V tolerant I/O
5.1.2 GPS:
GPS (Global Positioning System) module is
interfaced with the controller in order to track the
location where the bus goes. It has 65 channels to
acquire and track satellites simultaneously and
transferring them into the precise position and
timing information that can be read over either
UART port or RS232 serial port In this, the
controller forms the heart of the functioning of the
system. The location previously spoken by the
speaker that is stored in the PIC memory is
compared with the present location identified by
the GPS module. If after comparison the locations
•
match then the User person is notified and alarmed.
It has 5 Ports for Internal and External
The Global Positioning System (GPS) comprises
usage
three segments:


•
It has on chip Timers. 3 Timers are avail
satellites)
•
It has in built Analog to Digital Converter
The control segment (all ground stations
•
In built Multiplexer availability for signal
The
space
segment
(all
functional
Selection
involved in the monitoring of the system
master control station, Monitor stations,
and ground control stations)
•
It
has
serial
as
well
as
Parallel
Communication facilities

The user segment (all civil and military
GPS users).
•
In built Capture, Compare and Pulse width
modulation
5.2.2 Sensors:

Gas sensor:
Ideal sensor for use to detect the presence of
a dangerous LPG leak in your car or in a service
station, storage tank environment.

Microphone:
Applications
Gas leak detection system
This device is used to speak out the desired
Fire/Safety detection system
location by the User person which is then given as
Gas leak alarm
an input to speech recognition system.
High Sensitivity

Fire sensor:
•Detection Range: 100 - 10,000 ppm iso-butane
A flame detector is a sensor designed to detect and
propane
respond to the presence of a flame or fire.
• Fast Response Time: <10s
Responses to a detected flame depend on the
• Heater Voltage: 5.0V
installation, but can include sounding an alarm,
• Dimensions: 18mm Diameter, 17mm High
deactivating a fuel line (such as a propane or a
excluding pins, Pins - 6mm High
natural gas line), and activating a fire suppression
after comparison the locations match then the User
system.
person is notified and alarmed.

Fire sensor:
Pressure sensor:
A pressure sensor measures pressure, typically of
The Thermistor is another type of temperature
gases or liquids. Pressure is an expression of the
sensor, whose name is a combination of the words
force required to stop a fluid from expanding.
THERM-ally sensitive res-ISTOR. A thermostat is

RFID sensor:
Radio Frequency Identification used as indicator
a special type of resistor which changes its physical
resistance when exposed to changes in temperature.
for any interruption. They gets active due to the
presence of Temperature, Chemical, Strain,
Humidity.
Thermostats are generally made from ceramic
materials such as oxides of nickel, manganese or
cobalt coated in glass which makes them easily
damaged. Their main advantage over snap-action
types is their speed of response to any changes in
temperature, accuracy and repeatability.
Most types of thermostat’s have a Negative
Temperature Coefficient of resistance or(NTC),
that is their resistance value goes DOWN with an
increase in the temperature, and of course there are
some
which
have
a Positive
Temperature
Coefficient, (PTC), in that their resistance value
7. Flow Chart:
goes UP with an increase in temperature.
6. RF TECHNOLOGY:
Radio Frequency: The 10 kHz to 300 GHz
frequency range that can be used for wireless
communication. Also used generally to refer to the
radio signal generated by the system transmitter, or
to energy present from other sources that may be
picked up by a wireless receiver. Full duplex or
simultaneous two-way operation is not possible
with these modules. If transmit and receive module
8. Conclusion and Future :
are in close proximity and data is sent to a remote
receive module while attempting to simultaneously
Through this paper we hope to study the
receive data from a remote transmit module, the
receiver will be overloaded by its close proximity
subject
of
applications
to
support
disable
transmitter. This will happen even if encoders and
people, especially blind people increasingly spend
decoders are used with different address settings
a lot more attention. This idea was again
for each transmitter and receiver pair. If two way
demonstrate the broad applicability of the WSN
communications is required, only half duplex
technology. Although we realize the limitations of
operation is allowed.
the system that is still exiting as blind people
identification at the bus station, or need to add
some features such as equipment necessary to
search destination information for blind people,
RFID technology is used at the bus station to
recognize the blind people automatically etc, but
ReceiverModule
this system has reduced the inconvenience of the
blind
people
when
they
participate
bus
transportation. We take experiment two parts for
check about performance of this system. First part
particularizes
distance
according
to
RSSI
(Received Signal Strength Indication). Another part
checks process whole system. We can expect
excellence more easily to take bus by experiment
Transmitter Module
result. Understand some features are limited of this
version. And the complete bus system, we will
research more carefully about the design systems
Instrumentation and Measurement Technology
and technology used to design. So that we will
Conference, May 1-4, 2000,
design next version of this system early with more
[4] Brendan D Perry, Sean Morris and Stephanie
complete, as well as optimization function for the
Carcieri, (2009), 'RFID Technology to Aid in
blind when they participate bus system. Finally, we
Navigation and Organization for the Blind and
hope principle bus system can apply to other
Partially Sighted', pp. 1- 52.
no.4, pp.1-15.
systems such as Automatic shop to support disable
[5] Ravi Mishra and Sornnath Koley, (2012),'Voice
people in near future.
Operated Outdoor Navigation System For Visually
Impaired
Persons',
International
Journal
of
Engineering and Technology,Vol 3, Issue 2,pp.l539.References
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[ICCPCT-
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Authors
Author’s Name
Kolluri. Greeshma B.Tech (ECE).,
Pursuing M.Tech (VLSI &ES)
8686899942
Guide’s Name
M.RamMohan Rao M.Tech, MISTE,.FIETE.,(PhD)
Associate Professor
ECE Dept
9440095992