Embedded System

Topics: Electromagnetic spectrum, Embedded system, Microwave Pages: 9 (1779 words) Published: February 23, 2011
LIFE SAVING EMBEDDED SYSTEM
EARTHQUAKE DETECTION

Submitted by
P.A.Sathishkumar
P.Athimuthu
IInd CSE
Chandy college of Engineering

LIFE SAVING
EMBEDDED SYSTEM

Authors Names:P.ASathishkumar
line 1:Anna university Triunelveli -Computer Science and Engineering line 2: Chandy college of Engineering
line 3: Tuticorin,India
line 4: e-mail: paskcse@gmail.com
Authors Names:Athimuthu
line 1 : Anna university Triunelveli -Computer Science and Engineering line 2: Chandy college of Engineering
line 3: Tuticorin,India
line 4: e-mail: aravindhpc@gmail.com

ABSTRACT:

“Thousands of people killed as a cause of earthquake”

The above words aren’t the headlines of the newspaper but daily news everyone come across whenever we go through a newspaper or watching TV news. A person’s life is precious and meaningful to his loved ones. We, as responsible engineers felt a part of society to bring a system to avoid these mishaps. With the meteoric Embedded Systems along with microprocessor our designed system in preventing deaths and providing safe guided measures. A new revolutionary microwave life detection system which is used to locate human beings buried under earthquake rubble has been designed. This system operating at certain frequency can remotely detect the breathing and heartbeat signals of human beings buried under earthquake rubble. By proper processing of these signals, the status of the person under trap can be easily judged. The entire process takes place within a few seconds as the system is controlled by the microprocessor (8085) or microcontroller unit. By advent of this system the world death rate may decrease to greater extent as large percentage of death occur due to earthquake.

INTRODUCTION

At present as we all know the need of the hour is to find an effective method for rescuing people buried under earthquake rubble or collapsing building. It has to be done before we experience another quake. Present methods for searching and rescuing victims buried or tapped under earthquake rubble are not effective. Taking all factors in mind, a system which will be effective to solve the problem has been designed.

PRINCIPLE OF OPERATION:
The basic principle is that when a microwave beam of certain frequency (L or S band or UHF band) is aimed at a portion of rubble or collapsed building under which a person has been trapped, the microwave beam can penetrate through the rubble to reach the person. When the person is focused by the microwave beam, the reflected wave from the person’s body will be modulated or changed by their movements, which including breathing and heart beat. Simultaneously, reflected waves are also received from the collapsed structures. So, if these reflected waves from the immovable debris are cancelled and the reflected wave from the person’s body is properly distinguished, the breathing and heart beat signals can be detected. By proper processing of these signals, the status of the person under trap can be easily judged. Thus a person under debris can be identified.

MAJOR COMPONENTS OF THE CIRCUIT

The microwave life detection system has four major components. They are
1. A microwave circuit which generates, amplifier and distributes microwave signals to different microwave components.

2. A microwave controlled clutter cancellation system, which creates an optimal signal to cancel the clutter from the rubble.

3. A dual antenna system, which consists of two antennas, energized sequentially. 4. A laptop computer which controls the microprocessor and acts as the monitor for the output signal...
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