Implementation Of Electromagnetic Pole And Field Strength Instrument Device

ABSTRACT

This work is on implementing the field strength meter. This device is a detecting circuit, the detecting unit consists of an antenna and a tune circuit which also comprises of a coil and a capacitor. The circuit picks up RF energy on its  antenna and passes it to the tune circuit where all the frequencies, except one are lost in the coil. The only frequency to appear at the output of the tune circuit is the one that is equal to the natural resonant frequency of the tune circuit. This signal is passed to the RF amplifier stage where it is amplified. The coil for the tune circuit was chosen so that it is known for its fixed value of inductance. This allows us to further use a trimmer capacitor and put a scale around it on the casing so that you can read and select the frequency range. It was only design to give you an approximate value, and the display give the value in decibel of what was detected. The way in which the tune circuit works is quite amazing. The entire signal from radio stations, taxis, bugs, TV stations, cellular phones etc are picked up by the antenna and passed to the tuned circuit where they will set into operation.

COVER PAGE

TITLE PAGE

APPROVAL PAGE

DEDICATION

ACKNOWELDGEMENT

ABSTRACT

Chapter 1 – Introduction

1.1               Background of the Study

1.2               Problem Statement

1.3               Aim and Objectives of Project

1.3.1                      Aim

1.3.2                      Objectives

1.4               Justification of the Study

1.5               Significant of the Study

1.6               Scope and Limitation of project

1.7               Structure of the Project

Chapter 2 – Literature Review

2.1               Introduction

2.1               System’s theory of Operation

2.2       Overview of an electromagnet

2.3               Historical Background of the Project

2.4               Magnetic field around a conductor

2.5       Applications of electromagnets

Chapter 3 – Methodology and Implementation

3.1               Introduction

3.2               Data Collection and Material

3.3               Implementation Analysis

3.3.1            Description of the System’s Block Diagram

3.3.2                      Description of System Circuit Diagram

3.4               Soldering and Assembly Procedure

3.5               System Operational Guide

3.6               Bill of Engineering Measurement and Evaluation

Chapter 4 – Test and Result Analysis

4.1               Introduction

4.2               Tests

4.2.1              System’s subunits test/measurement

4.3               Results

4.3.1              Analysis of Result

Chapter 5 – Conclusion and Recommendations

5.1               Introduction

5.2               Summary and Conclusion

5.2.1              Summary

5.2.2              Conclusion

5.3            Recommendations

CHAPTER ONE

1.0                                                        INTRODUCTION

1.1                                         BACKGOROUND OF THE STUDY

Permanent magnets produce a good and sometimes very strong static magnetic field, in some applications the strength of this magnetic field is still too weak or we need to be able to control the amount of magnetic flux that is present. So in order to produce a much stronger and more controllable magnetic field we need to use electricity.

By using coils of wire wrapped or wound around a soft magnetic material such as an iron core we can produce very strong electromagnets for use in many different types of electrical applications. This use of coils of wire produces a relationship between electricity and magnetism that gives us another form of magnetism called Electromagnetism.

Electric and magnetic field is produced when an electrical current flows through a simple conductor such as a length of wire or cable, and as current passes along the whole of the conductor then a magnetic field is created along the whole of the conductor. Since electric/magnetic field is hazardous to health it advisable to design a means of limiting the field after detected.

The field strength meter is actually a simple electronic receiver where signal is detected and fed to a micro ammeter, which has a graduated scale in dbμ. The frequency range of the tuner is usually within the terrestrial broadcasting band. Some field strength can also receive satellite frequencies. Most modern field strength meter have AF and VF circuit and can be used as standard receiver. Some FS detectors are also equipped with printers to record field strength. To measure using a field strength meter it is important to use a calibrated antenna that is standard. For accurate measurement the antenna must be of standard height. The transmitters have sufficient output to detect the radiation when the antenna is outstretched.

1.2                                   PROBLEM STATEMENT

Electric field discharge is rampant in our present society due to advancement in technology, telecommunication transmitters such as in Television, radio broadcasting stations, telephones etc, hence the strength of field released is high. With these in mind, it is therefore important to design a field strength meter which determines the amount of electric field strength around a location. Field strength meter is a measuring device which measures the signal strength caused by a transmitter. The need for field strength measurement is essential when designing and building transmitters.

1.3                      AIM AND OBJECTIVE OF THE STUDY

The main aim of this work is to study the electromagnetic pole and field strength instrument device. The objectives are:

1. To study the relationship between current flowing through the conductor and the resultant magnetic field produced around it.
2. To understand to electricity flow with magnet.

• To measure the electromagnetic field that exist in electronics circuits such as AM transmitter

1. To build a circuit that can measure the strength of a magnetic field and see how the field strength changes with distance.

1.4                   SCOPE AND LIMITATION OF THE STUDY

This study is on how electromagnetic field is produced around us. The system provides signal strength values and allows us to compare and estimate the efficiency of a transmitter and its expected range. The system describe here, incorporate the use of coil, transistor, diodes, capacitors and resistors to achieving the aim of this project.

The field strength meter automatically response to varying field by sensing or detecting the strength of the field radiated or transmitted around, to which digital meter is used to indicate the presence electric field in a particular area, be it an electronic device such as mobile phone or radio equipment etc,

1.5                            JUSTIFICATION OF THE STUDY

An electrically charged object produces an electric field, and this field has an effect on other charge objects in the vicinity. Since electric/magnetic field is hazardous to health it advisable to design a means of limiting the field after detected. The system provides signal strength values and allows us to compare and estimate the efficiency of a transmitter and its expected range.

1.6                                           SIGNIFICANCE OF THE STUDY

This research work will throw more light on the techniques for generating electricity with magnet. This study will also be designed to be of immense benefit to all electrical engineering student.

It will also serve as a guide to whoever that wants to learn how electricity is generated.

1.7                                    PROJECT STRUCTURE

The work is organized as follows: chapter one discuses the introductory part of the work,   chapter two presents the literature review of the study,  chapter three describes the methods applied, chapter four discusses the results of the work, chapter five summarizes the research outcomes and the recommendations.