UNDER THE GUIDENCE OF: Ms.D.SAJANI

A MINI PROJECT REPORT ON

Development of Electronic Nose for Environment Quality Classification

By: S.KIRAN KUMAR (08N91A0428) Md.MAJID (08N91A0442) M.KARTHIK REDDY (08N91A0425) T.MAHARSHI (08N91A0439)

CONTENTS:

• INTRODUCTION

• BLOCK DIAGRAM

• EXPLANATION

• SCHEMATIC

• IMPLEMENTATION & EXECUTION

• EMBEDDED EDA TOOLS

• LANGUAGES

• HARDWARE MODULES

• APPLICATIONS • CONCLUSION

• REFERENCES

INTRODUCTION : Electronic nose is a device used to detect band

recognize odors and vapours,i.e a machine olfaction device with an array of chemical sensors.

The most common use at the present time for the Enose is with in the food and drink industries.

In addition to these field Enose can be used in other areas such as petroleum qualitative and quantitative analysis, detection of Explosives.

Alternatively, according to Gardner and Bartlett,(1994)

“An electronic nose is an instrument which comprises an array of electronic chemical sensors with partial specificity and appropriate pattern recognition system, capable of recognizing simpler complex odors”.

Monitoring and classification of ambient air quality in various workplaces has been increasingly important due elevated environmental problems.

Thus, atmospheric pollution from factory should be regularly monitored.

In this proposed work, electronic nose system is implemented so that signal from isolated locations can be expediently combined and processed at a database server.

Electronic nose is developing by commercial gas sensor arrays and microcontroller.

Block diagram:

BLOCK DAIGRAM EXPLANATION: The system consists of an I2C-ADC interfaced to

microcontroller through an I2C bus which has only two lines namely serial data line (SDA) and serial clock line(SCL).

Each device connected to the bus is software addressable by a unique address and simple master/slave relationship exists at all times.

Even if there is a need to expand the number of sensor parameters to be measured in near future there is no need to reprogram the I2C protocol and redesign the complete hardware circuits.

IC’s can be added to or removed from a system without affecting any other circuits on the bus.

The micro controller A/D converter performs periodic scan of these sensors.

The sensor data are compared with set point values stored in memory and accordingly the controlling mechanism of the devices is carried out at the other end.

All parameters values are displayed on LCD unit using LCD interface.

SCHEMATIC DIAGRAM

AT89S52(Micro Controller):

• A CPU (Central Processing Unit) 8 Bit. • 256 bytes of RAM (Random Access Memory) internally. • Four-port I / O, each consist of eight bits. • The internal oscillator and timing circuits. • Two timer / counters 16 bits. • Five interrupt lines

LCD SCREEN:16 Characters x 2

Lines5 x 7 Dots with

CursorBuilt in Controller+5v Power Supply

(Also Available for +3V)

N.V. optional for + 3V power supply

Power Supply:

IMPLEMENTATION & EXECUTIONThis proposed work would be implemented

using embedded design methodology.

This project would be carried out with AT89S52 Micro controller.

Industry driven Embedded EDA Tool kits and Embedded ‘C’ Language.

Embedded ‘C’ language for 8051 family Microcontrollers.

Embedded EDA Tools: Kiel IDE (Version 3.20a) for developing and

editing the source code, Real view C Cross Compiler, Real Time Library for AT89S52, software Hardware simulators.

Languages: Embedded C for AT89S52 controller. Technologies Used: Firmware implementation for I2C protocol UART (porting the hex code)

Hardware modules:AT89S52 Micro controller Zigbee Modules

LCD I2C-ADC-8CH Card

Applications:It can be used in hazardous places as it is

controlled by server system.It has most of the features of smart sensing

and communicating to other embedded PC through wireless interface.

Industrial control and automationRemote device control and data acquisition

and processing.Portable instrumentation and industry

process control.

Conclusion: By here we conclude that this proposed research is implemented

using embedded EDA tools, which is useful to detect the pollution,temperature,light and humidity near by the surroundings.

REFERENCES :WWW.SOMAROUTHU

TECHNOLOGIES.COMWWW.WIKIPEDIA.ORG

THANK YOU