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Design And Construction Of A Metal Detector
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1.3 Objective of the Project
To construct a walk through metal detector that is capable of detecting the presence of a metallic device.
To the walk through metal detector world also incorporate the functionality of metallic object.
The walk through metal detector will be capable of producing an alarm on reception of a metallic object.
1.4 Significant of the Project
The
significant of this project is to construct a functional electronic
detector security system, which will be beneficial technology to human
beings. This project will also bring technology nearer home especially
to the student, and to me as the designer, and the contribution in the
advancement of technology, thus helping them to assemble, design and
construct projects based on simple component and material locally or
foreign.
Again, this project will encourage indigenous technology and
discourage the large expense being made on foreign security systems.
All these were born in mind during the assembling, designing
construction and casing of this project.
1.5 Methodology
This
system is developed using several electrical and electronic principles.
The principle of electromagnetism is a major principle applied. When the
coil which serves as the sensor is placed over a metal and the system
is switched ON, the electric current passing through the coil makes it
magnetic and being placed over a metal, the metal generates a very small
voltage (in micro volts) in form of eddy currents. This generated eddy
current is received by the sensors and thus it causes a disturbance to
the main current flow. The difference is harnessed by electronics and
connected to an amplifier from where it is fed into the audio output
which serves as the transducer to the system.
1.6 Scope of the Project
The
metal detector designed in this project will make use of technology
called Beat Frequency Oscillator (B.F.O). this technology employs two
oscillators at resonance and a variation of the frequency of oscillation
of one of the oscillators due to the presence of a metallic object
would be picked up by a tiny receiver within the control box which
creates an audible series of tones (beats) based on the difference
between the frequencies.
1.7 Project Outline
The first chapter
of this project write up gives an introduction to the work intended. It
discusses a short background of the project work. The specific
objectives of the project are also clearly stated. The problem the
system is to solve and its significance is also highlighted. The scope
of the work is stated here in terms of the parameters to be achieved in
the design.
The second chapter of this write up reviews the related
literature of the work. It gives basic insight as to principle of
operation of the system. It also reviews past design in this field and
the results obtained.
The third chapter show cases the design methodology and on the explanation of each method employed.
The
fourth discusses the actual design of the work. The analysis,
assumptions an mathematical models involved in achieving a complete
system design is discussed.
The chapter five deals on the procedures
observed in the coupling of the different designs and modules of the
work. Also the result of the finished project after test and evaluation
and conclusion made are stated.
The last chapter contains the
conclusion and recommendations made. It also contains the Bill of
Engineering Measurement and Evaluation (BEME).
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ABSRACT - [ Total Page(s): 1 ]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 optimized or complete without the installation of metal detec ... Continue reading---
