VEHICLE GAS DETECTION WITH AUTOMATIC SAFETY WARNING SYSTEM USING GSM TECHNOLOGY

INTRODUCTION The more you drive your car, the more you are at risk. Cars with over 100,000 miles on them are very dangerous. white gas resembling water vapor blows out of the air vents in the car. This is the gas in its more concentrated form. Causes Lung Cancer and Alzheimer’s disease Affects included extreme drowsiness, memory loss, and not being able to concentrate on driving. Need of good safety system Avoid health risk

PROPOSED SYSTEM Project aims to modify an existing safety model employed in automotive field Designing a microcontroller based toxic gas detection system Offers faster response time Accurate detection

BLOCK DIAGRAM GAS SENSOR BUZZER I/F I/F MICRO CONTROLLER GSM MODEM I/F NO HELP BUTTON WINDOW I/F

HARDWARE REQUIREMENTS MICROCONTROLLER GAS SENSOR GSM MODEM BUZZER WINDOW

SOFTWARE REQUIREMENTS BASCOM BASIC 8051 ATMEL PROGRAMMER

MICROCONTROLLER-8052 The processor ,the RAM,ROM,I/O Ports and Timer are all embedded together on one chip Consists of - 8K ROM - 256 RAM - 3 Timers - 32 I/O Pins - 1 serial port - 8 Interrupt sources

PIN DIAGRAM

PIN DESCRIPTIO N Total 40 pins 4 Ports-P0,P1,P2,P3 Each port has 8 pins Rest of the pins are Vcc,GND,XTAL1,XTAL2,RST,EA,PSEN and ALE

Gas sensor

GAS SENSOR 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. 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

FEATURES Wide detecting scope Fast response and High sensitivity Stable and long life Simple drive circuit

GSM MODEM GSM –Global System for Mobile Communication A GSM modem is a wireless modem that works with a GSM wireless network. sends and receives data through radio waves. Like a GSM mobile phone, a GSM modem requires a SIM card from a wireless carrier in order to operate. GSM modems can be a quick and efficient way to get started with SMS. GSM modems are a cost effective solution for receiving SMS messages.

GSM

GSM INTERFACE-MAX232

MAX232 MAX232 is a Voltage converter Converts RS232 voltage levels to TTL voltage levels and viceversa It uses +5V power source Two sets of line drivers for transferring and receiving data

MAX232

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