Download 13EM17 PASSENGER BUS ALERT SYSTEM FOR EASY

13EM17
PASSENGER BUS ALERT SYSTEM FOR EASY NAVIGATION OF BLIND
2013 International Conference on Circuits, Power and Computing Technologies
[ICCPCT-2013]
G.Lavanya ME., Preethy. W*, Shameem.A *, Sushmitha.R*
Technical Specifications:
Title of the project
:
Passenger Bus Alert System for easy Navigation of Blind
Domain
:
Embedded Systems Design
Software
:
Embedded C, Keil, Flash magic
Microcontroller
:
LPC2148 MCU
Power Supply
:
+5V, 750mA Regulated Power Supply
Display
:
16x2 LCD Display
Crystal
:
12MHz
Communication Device
:
GPS Module
Applications
:
Automotives, Security, Transportation, Logistics etc
Developed By
:
M/S Wine Yard Technologies
Phone
:
040-6464 6363, www.WineYard.in
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13EM17
ABSTRACT:
Helping Hands for the Blind was founded to address the concerns, and as a vital
resource for the blind. Helping Hands for the Blind is an organization of blind people who want
to help other blind people. It is a problem solving organization. It is a guide that blind people
can turn to in times of need. Helping a blind person through all the paperwork can literally be a
life saver. Another important form of assistance is to provide a Mobility Instructor. When a
blind person is new to an area, it is important that they be shown how to get around by a
trained and knowledgeable instructor. There is a large and growing demand for this service. The
project aims in designing a system which is capable of alerting the user if his destination is
reached.
GPS is the acronym for Global Positioning System. It is employed to find the position,
velocity and time of user is located on the earth. This information is provided by the GPS
receiver with the help of the data it receiver from satellites.
Microcontroller is the heart of the device. It stores the data of the current location which it
receives from the GPS receiver, if control button is pressed. Whenever user arrives to the saved
location it alerts through voice system present in the system. This device helps the blind people
in their journey. It helps him to get the alerts regarding the arrival of his destination before few
minutes.
This device is designed to provide with a greater advantage producing voice based
announcement for the user i.e. the user gets the voice which pronounces his destination
location as and when it is about to reach the destination. Here instead of the alerting sound the
user can directly hear the location recorded by the user itself.
This project is designed with ARM7TDMI processor.
In this project we are using
different modules such as LPC2148, GPS, Voice circuit, 16X2 LCD. In this project we are using
APR9600 audio recording kit which is controlled by LPC2148 for the total operation of audio
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13EM17
recording, playing and stopping. Initially there are control switches available for mode selection
to the LPC2148 MCU, then it will operate the APR9600 accordingly and the status is displayed
on the LCD for user identification.
The LPC2148 are based on a 16/32 bit ARM7TDMI-S™ CPU with real-time emulation and
embedded trace support, together with 128/512 kilobytes of embedded high speed flash
memory. A 128-bit wide memory interface and unique accelerator architecture enable 32-bit
code execution at maximum clock rate. For critical code size applications, the alternative 16-bit
Thumb Mode reduces code by more than 30% with minimal performance penalty. With their
compact 64 pin package, low power consumption, various 32-bit timers, 4- channel 10-bit ADC,
USB PORT,PWM channels and 46 GPIO lines with up to 9 external interrupt pins these
microcontrollers are particularly suitable for industrial control, medical systems, access control
and point-of-sale. With a wide range of serial communications interfaces, they are also very
well suited for communication gateways, protocol converters and embedded soft modems as
well as many other general-purpose applications.
This project uses two power supplies, one is regulated 5V for modules and other one is
3.3V for LPC2148. 7805 three terminal voltage regulator is used for voltage regulation. Bridge
type full wave rectifier is used to rectify the ac out put of secondary of 230/12V step down
transformer.
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13EM17
Contrast
control
POWER SUPPLY
BLOCK DIAGRAM:
16X2 LCDDISPLAY
L
P
GPS
Receiver
MAX232
U
C
A
2
R
1
VOICE
CIRCUIT
(APR9600)
SPEAKER
I2C Protocol
T
RESET
EEPROM
4
8
CONTROL
switches
CRYSTAL
OSCILLATOR
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13EM17
POWER SUPPLY TO ALL SECTIONS
Step
down
T/F
Bridge
Rectifier
Step
down
T/F
Regulator
Filter
circuit
Bridge
Rectifier
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Filter
Circuit
Regulator
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