ABSTRACT
The project work titled Design and construction of a metal detector. When fully design and implemented would be able to detect any metallic material that is passing or coming close. This function would serve as a security check for dangerous metallic material as an alarm. Going by the sophisticated means of armed rubbers adopt these days in the breaking into bank supermarkets offices and highly secured area. No security system will be optimised or complete without the installation of a metal detector. This will stop or reduce to the barest minimum the activities of men of the underworld. The device we then build will function as a metal detector that can scout out metal objects, such as coins, nails, keys such as car keys you may not be able to find, and even gold if you’re looking for it on a beach(though this one may not have industrial strength). This metal detector can detect certain kinds of metal- especially iron –containing metals, which are called ferrous meat, even if under a half-inch of dry wall or sand.
TABLE OF CONTENT
Title Page----------i
Approval Page---------ii
Certification---------iii
Dedication---------iv
Acknowledgement--------v
Abstract----------vii
Table of Content --------viii
List of Figures ---------xii
CHAPTER ONE: INTRODUCTION
1.1Background of Study------1
1.2Problem Statement--------2
1.3Objective of the Project------3
1.4Significant of the Project------3
1.5Methodology--------4
1.6Scope of the Project-------4
1.7Project Outline--------5
CHAPTER TWO:
LITERATURE REVIEW
2.1 What a Metal Detector Is------7
2.1.1 Brief History of Metal Detector Evolution--8
2.2 Types of Metal Detectors Available----11
2.2.1 Pulse Induction (PI) Metal Detector----12
2.2.2 Industrial Metal (IM) Detector-----14
2.2.2.1 Basic operation of an IM Detector---15
2.2.3 Coin/Treasure Metal Detector----16
2.3 Uses of Metal detectors------18
2.4 Principles Applied in the Project----19
2.4.1 Magnetism--------19
2.4.1.1 Paramagnetism-------22
2.4.1.2 Ferromagnetism-------23
2.4.1.3 Diamagnetism-------26
2.4.1.4 Antiferromagnetism------27
2.4.1.5 Ferrimagnetism-------28
2.4.1.6 Superparamagnetism------29
2.4.1.7 Electromagnet-------29
2.5 Electromagnetism-------30
2.6 Brief Description of the Electronic Components Used -33
2.6.1 Resistor---------33
2.6.2 Inductors---------35
2.6.3 Capacitors--------36
2.6.4 Transistors--------37
2.6.5 TDA0161---------37
CHAPTER THREE
3.1Design of a Metal Detector Circuit----39
3.2How this Metal Detector Works ----39
3.3Component Use for Design -----40
3.4Metal Detector Schematic -----43
3.5Explanation of Circuit ------43
3.6TDA0161 Proximity Detector IC ----44
3.7Resistor R1 and Potentiometer R2----44
3.8How to Use Metal Detector -----47
3.9Power Supply Unit -------49
3.10Principle of Operation of the Metal Detector --49
3.11Calculations Involving Choice of Component andtheir Functions ----51
CHAPTER FOUR:
SYSTEM IMPLEMENTATION
4.1 Testing---------56
4.2 Performance Evaluation------57
4.3 Project Packaging-------58
4.4 Bill of Engineering Measurement and Evaluation-58
CHAPTER FIVE:
SUMMARY AND CONCLUSION
5.1Summary of Achievements-----60
5.2Problems Encountered and Solutions Adopted-61
5.3Contribution to Knowledge------63
5.4Suggestions for Further Improvement ---63
5.6 Recommendation-------65
5.5 Conclusions--------66
References---------68
Appendix----------70