Gas leak detection is the process of identifying potentially hazardous gas leaks by means of various sensors. These sensors usually employ an audible alarm to alert people when a dangerous gas has been detected. The total circuit units are arranged on PCB board.

1. PROJECT GUIDE: PROF. SNEHAL MARATHE

2.  Gas leak detection is the process of
identifying potentially hazardous gas
leaks by means of various sensors.
 These sensors usually employ an audible
alarm to alert people when a dangerous
gas has been detected.
 The total circuit units are arranged on
PCB board.

5.  TM4C123GH6PM MICROCONTROLLER
 Tiva Launchpad
 BOB(break out board) of TM4C123GH6PZ
 MQ6
 LCD DISPLAY
 LM35
 MP3H6115A
 RHT MODULE
 LM358
 TRANSISTOR BC547
 USB
 VOLTAGE REGULATOR 1117
 BUZZER
 PUSH BUTTONS
 LEDs
 PRESET

6.  An efficient and smooth working controller is needed to continuously
sense both leakage and level of the gas. And also fast response is require
when leakage found .
 Along with this the monitoring system must provide additional leakage
information which can be used in further processing.
 The detection system includes ARM CORTEX BASED microcontroller
board which is CCS OR ECILPSE compatible with microcontroller chip
TM4C123GH6PZ

7.  Schematic

8.  PCB LAYOUT

9.  The LPG gas consists of isobutene, propane, methane, etc. A sensitive,
efficient gas sensor is required that senses only LPG gas contents and is
less sensitive to other gases like cooking fumes, cigarettes, etc. Sensitive
material of MQ-6 gas sensor is SnO2, which with lower conductivity in
clean air
 (MQ6) When the target combustible gas exist the sensor’s conductivity
is higher along with the gas concentration rising. MQ-6 gas sensor
has high sensitivity to Propane, Butane and LPG, also response to
Natural gas.
 The sensor could be used to detect different combustible gas, especially
Methane; it is with low cost and suitable for different application. It
senses the leakage of LPG gas and sends the alert signal to the
microcontroller alternatively turn on Buzzer when it reaches the danger
level.

10.  The Tiva™ C Series TM4C123G Launchpad Evaluation Board (EK-
TM4C123GXL) is a low-cost evaluation platform for ARM® Cortex™-
M4F-based microcontrollers.
 The Tiva C Series Launchpad design highlights the TM4C123GH6PMI
microcontroller USB 2.0 device interface, hibernation module, and
motion control pulse-width modulator (MC PWM) module.
 The Tiva C Series Launchpad also features programmable user buttons
and an RGB LED for custom applications

11.  It is necessary requirement to put a display about system monitoring
and controlling performance, which displays the various messages
such as leakage of gas detection, booking of cylinder in case of
refilling of cylinder .
 Additionally the system also, displays the actions carried out in the
microcontroller. For the work of displaying the alert messages Liquid
crystal display (LCD) of 16*2 characters operating on +5 volt supply
and operated 4-bit mode is implemented

12.  A buzzer or beeper is a signaling device, usually electronic, typically
used in automobiles, household appliances such as a microwave oven,
or game shows .

13.  It is a cross compiler
 A cross compiler is similar to the compilers but we write a program
for the target processor on the host processors (like computer of x86)
 ECLIPSE Software provides you with software development tools
for the Arm cortex family of microcontrollers.
Arm cortex project development cycle: -
These are the steps to develop TM4C123GH6PM project using
eclipse.
Create source files in C or assembly.
Compile or assemble source files.
Correct errors in source files.
Link object files from compiler and assembler.
Test linked application.

14.  Our idea is to make a very accurate and cheap sensor which gives the
precise readings we have interfaced mq6 (adc module ) with tiva
cortex microcontroller
 To pin 7 this ADC module detect the LPG gas leakage. Along the
GPIO PIN PG7 we have interfaced buzzer SG1.the basic concept is as
soon as gas leakage is sensed the GPIO PIN PG7 gets enable and the
buzzer goes on with the sound of beep .
 If somebody is away from the point of leakage of gas it will alert the
person from disastrous .along with we have interfaced 16*2 lcd with
data PINS D4,D5,D6,D7 to PD0,PD1,PD2,PD3(4bit) this LCD is used
for displaying the status of gas leakage .this is useful for those who
are deaf its also displays various parameters such pressure
(MP3H6115A sensor ), temperature sensor(LM35),humidity
 .

17.  It is used in gas industries.
 It is used in mining of coal and
other materials.
 It is used in municipal gas
distribution
 It is used in nuclear power stations

18.  This monitoring system can be further enhanced by using Bluetooth in
place of GSM to send the alert messages to user, which supports the
another real-time application.
 For industrial purposes mobile robot can be developed for detecting
multiple gas concentrations.
 Addition to gas sensor temperature sensor can also be used which
detects the high pressure gas in cylinder pipe, display the alert SMS
when high temperature is reached

19.  This monitoring and detection system is proposed mainly to meet the
safety standards and to avoid fire accidents because of leakage.
 An embedded system for hazardous gas detection has been
implemented; here only two gases (LPG and Propane) have been
detected for demo purpose. The gas sensors and the critical level of the
respective gas should be known, and then this system can be
implemented for detecting various gases either in domestic area such
as places of educational institutions, residential and industrial areas
which avoids endangering of human lives.
 This system provides quick response rate and the diffusion of the
critical situation can be made faster than the manual methods.