Design and Implementation of Vehicle Gaseous Fuel Leakage Detection System using GS

IJSRD - International Journal for Scientific Research & Development| Vol. 1, Issue 8, 2013 | ISSN (online): 2321-0613
All rights reserved by www.ijsrd.com 1595
Design and Implementation of Vehicle Gaseous Fuel Leakage Detection
System using GS
S. Harish1
1
Department of Electronics and Communication Engineering
1
VNRVJIET
Abstract—In this paper, a new method of designing and
development of a microcontroller based toxic gas detection
system is proposed. If the toxic gas or fuel leakage has been
detected, the system automatically alerts the driver through
buzzer, opens the car door automatically and transmits the
warning message to the authorized user through the GSM
module attached. User can send SMS and receive SMS
through GSM Modem, based on that message User can
control some appliances in host section. This system aims to
modify an existing safety model employed in automotive
field. It can be used in any Vehicle like Car, Bus Van etc.
The advantage of this automated detection/alarm system is
that, it offers faster response time and accurate detection of
an emergency in turn leading to faster diffusion of the
situation, compared to manual methods. This is a very
compelling reason that justifies designing such a safety
system.
Key words: Global System for Mobile Communication
(GSM), LPC 2148 Microcontroller (ARM7), Fuel Detection
System.
I. INTRODUCTION
Safety plays a major role in today’s world and it is necessary
that good safety system be implemented in places of
travelling in a car. One of the most serious problems that
one could have with the vehicle is a fuel leak. When leaking
of fuel from any area of the car happens, it presents a very
serious danger that could result in a catastrophe. If we
suspect that there is a fuel leak in the car, you should
consider using a fuel leak detector to find out exactly where
the leak is occurring so that we can begin to repair the issue
before it becomes a disaster.
Here a new automated system is proposed. The
advantage of this automated detection/alarm system is that it
offers faster response time and accurate detection of an
emergency in turn leading to faster diffusion of the situation,
compared to manual methods. This is a very compelling
reason that justifies designing such a safety system [1].
There are no. of applications of vehicle safety
outlined in many areas such as military, environmental,
health, home, commercial, and the industrial. Particularly,
the vehicle safety solutions for real time monitoring of
nuclear power plant [2].
II. BLOCK DIAGRAM OF THE PROPOSED SYSTEM
The hardware used in this system design is explained as
block diagram and its description also given. The important
components and modules used in hardware design are
explained.
The block diagram of Fig.1 shows the interface of gas
leakage detection, GSM, and high speed microcontroller
(LPC2148)
Fig. 1: Block Diagram of the fuel detection system
When powered on the equipment the stepper motor will be
running state. The gas and the temperature sensor
continuously checks for the temperature change or any fuel
is leaked. The controller keeps on monitoring the values of
the temperature and gas sensor. The value of the sensor
exceeds the predefined values stored in the microcontroller.
In such a condition, the controller will send the specified
message to the user whose no is stored in the controller.
This is done by the serial communication RS-232
driven by a MAX-232 level converter, in this is the inter
face between controller and the GSM module and it is
controlled by the controller through AT commands. The
GSM module when received the particular command sends
the predefined message to the number stored from the sim
card placed in the socket provided in the module. The
message received by the user who is in remote location will
contain information regarding the temperature and voltage
values when fuel leakage occurs, it will alerts the user by led
(LM-35) indicator if he is in the car.
The detection unit reaches the maximum threshold
level, at the same detects any toxic gas it send an SMS
through GSM Modem. User can send SMS and receive SMS
through GSM Modem, based on that User can control some
appliances in host section.
III. TECHNOLOGY AND HARDWARE
A. GSM Technology
GSM is a cellular network which means that mobile phones
connect to it by searching for cells in the immediate vicinity.
There are five different cell sizes in a GSM network—
macro, micro, pico, femto and umbrella cells. The coverage
area of each cell varies according to the implementation
environment. Macro cells can be regarded as cells where the

Design and Implementation of Vehicle Gaseous Fuel Leakage Detection System using GS
(IJSRD/Vol. 1/Issue 8/2013/0017)
base station antenna is installed on a mast or a building
above average roof top level. Micro cells are cells whose
antenna height is under average roof top level; they are
typically used in urban areas. Picocells are small cells whose
coverage diameter is a few dozen metres; they are mainly
used indoors. Femtocells are cells designed for use in
residential or small business environments and connect to
the service provider’s network via a broadband internet
connection. Umbrella cells are used to cover shadowed
regions of smaller cells and fill in gaps in coverage between
those cells[4].
Fig. 2: GSM architecture
To achieve important information of cars, one GSM module
is added into the car security system. SIM300 GSM modem
can quickly send SMS messages to appointed mobile phone
or SMS server. So the owner and the police can be informed
at the first time.
To achieve important information of cars, one
GSM module is added into the car security system. SIM300
GSM modem can quickly send SMS messages to appointed
mobile phone.
Fig. 3: GSM Module
1) Interfacing SIM300 module with Microcontroller
The LPC2148 provides two UARTs that are controlled and
accessed by SFRs. Each UART has an address that is used
to read and write the value contained in the UART. The
same address is used for both read and writes operations and
the read and writes operations are distinguished by the
instruction. Its own SFR control register controls each
UART.
But the serial port and the debug port don’t support
the RS_232 level and it only supports the CMOS level. It
should add the level converter IC between the DCE and
DTE.
Fig. 4: Interface Microcontroller with GSM module
Gas SensorB.
Gas sensor used to detect various combustible gases there is
a sensing element inside the stainless steel mesh. Resistance
of the sensing element reduces rapidly There is a heating
element inside the sensor.
Fig. 5: Gas Sensors
The heater terminals should be connected to 5V DC. The
sensor can be wired using a general purpose op-amp such as
741 in comparator mode. Also by using a variable resistor,
the sensitivity can be adjusted very easily.
LM35 Temperature SensorC.
The LM35 can be applied easily in the same way as other
integrated-circuit temperature sensors. It can be glued or
cemented to a surface and its temperature will be within
about 0.01§C of the surface temperature.
Fig. 6: LM35 Temperature sensor

This presumes that the ambient air temperature is almost the
same as the surface temperature, if the air temperature were
much higher or lower than the surface temperature, the
actual temperature of the LM35 die would be at an
intermediate temperature between the surface temperature
and the air temperature.
ARM7 (LPC2148)ModuleD.
Fig. 7: ARM7 (LPC2148) Board
The LPC2141/42/44/46/48 microcontrollers are based on a
16-bit/32-bit ARM7TDMI-S CPU with real-time emulation
and embedded trace support, that combine microcontroller
with embedded high speed flash memory ranging from 32
kB to 512 kB. A 128-bit wide memory interface and unique
accelerator architecture enable 32-bit code execution at the
maximum clock rate. For critical code size applications, the
alternative 16-bit Thumb mode reduces code by more than
30 % with minimal performance penalty [5].
Due to their tiny size and low power consumption,
LPC2141/42/44/46/48 are ideal for applications where
miniaturization is a key requirement, such as access control
and point-of-sale. Serial communications interfaces ranging
from a USB 2.0 Full-speed device, multiple UARTs, SPI,
SSP to I2C-bus and on-chip SRAM of 8 kB up to 40 kB,
make these devices very well suited for communication
gateways and protocol converters, soft modems, voice
recognition and low end imaging, providing both large
buffer size and high processing power. Various 32-bit
timers, single or dual 10-bit ADC(s), 10-bit DAC, PWM
channels and 45 fast GPIO lines with up to nine edge or
level sensitive external interrupt pins make these
microcontrollers suitable for industrial control and medical
systems.
The ARM Controller board is operated on 5v
power supply. In this board each component operates on 5v
supply except controller. Controller operates on 3.3v supply.
The LM317 regulator converts 5v supply into 3.3v.The
current drawing of the board is depend on the size of the
code, as the code length increases current drawing of the
board is also increases. The maximum current capability of
the board is 1.5A.
IV. SOFTWARE FLOW CHARTS
Fig. 8: Software Flow chart for GSM
The Software Flow chart for GSM is shown in the above
Fig.8. The system continuously checks for the leakage. If
the leakage is found, it sends the message to the user and
alerts when he is in a remote place.
Fig. 9: Software flow chart of the buzzer
The Software Flow chart for Buzzer is shown in the above
Fig.9. The system continuously checks for the leakage. If
the leakage is found, it alerts driver in the car with the
buzzer indication.

V. RESULTS AND DISCUSSIONS
Fig. 10: Photograph of Vehicle Fuel Leakage Detection
System.
The Photograph of Vehicle Fuel Leakage Detection System
is shown in the Fig.10. It shows the interface of the various
modules in the design.
Fig. 11: Smoke Detection
Fig. 12: Alert shown by LED on Gas Leakage (Buzzer)
When the gas leakage has been detected, the driver in the
vehicle is alerted by the LED indication as shown in the
above Fig. 12.
Fig. 13: Screenshot 3 of Real time debugging.
The above Fig.13 shows the messages received by the two
different mobile phone numbers through the Flash magic
terminal. Data consists of service number, pulse count, no.
of units and amount fields.
Fig. 14: Message output
The message received by the user is shown in the above
Fig.14. We can observe service number, pulse count, no. of
units and amount fields in the message
VI. CONCLUSION
The implementation of interface between GSM, and Gas
detection sensor with LPC2148 is done successfully. The
interface is properly done without any collision among
GSM, Leakage module is done. The design and realization
of interface between GSM modem and GSM network for
data transmission done successfully. Therefore, the car is
monitored periodically by the sensors and the an SMS will
be sent to the user when there is an gaseous fuel is detected
in the car or vehicle and also Indicator will glows indicating
the persons in the car. The results of the Keil software have
been obtained by compiling the code and equipment is
tested practically by placing it near the Engine Control
Module. The designed system provides a real time and low
cost solution to the fuel leakage problem and prevents many
accidents.
ACKNOWLEDGMENT
It is a pleasure to recognize the many individual who have
helped me in completing this technical paper. We sincerely
express our heartiest thanks to Dr. P. SriHari, Head of the
Department, ECE, VNRVIET and A.Ramesh Kumar, Senior
Assistant Professor, VNRVIET for all the technical
guidance, encouragement and support throughout this
process.

REFERENCES
[1] S. Ajaz, M. Asim, M. Ozair, M. Ahmed, M. Siddiqui,
Z.Mushtaq, “Autonomous Vehicle Monitoring &
Tracking System,” SCONEST 2005.
[2] Cisco IOS Firewall Intrusion Detection System
Commands.
[3] Douglas V Hall, “Microprocessor and Interfacing-
Programming & Hardware”.
[4] Lili Wan, Tiejun Chen “Automobile Anti-theft System
Design based on GSM” IEEE 2008.
[5] http://www. gisdevelopment.net.
[6] CCMTA Best Practice Models for Combating Auto
Theft, Version 6.1, Oct. 2006, Anti Auto-Theft Project
Group .
[7] http://www.wikipedia.org.
[8] http://www.howstuffworks.com.

Design and Implementation of Vehicle Gaseous Fuel Leakage Detection System using GS

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Design and Implementation of Vehicle Gaseous Fuel Leakage Detection System using GS