ABSTRACT
This
project is design and construction of a sound detector with alarm system was
done primarily to detector sound. It can be use in industrial and domestics. It
employ four discreet stages with power supply which power the system.
The 1st
block is pick up amplifier containing the microphone and the input which serve
as a transformer which the function is to pick up the smallest sound that comes
close to the amplifier
The
second block is comparator with hysterias. The function as analogue to digital
convector and also it help to accumulate amparm sound like sound of the gun
short or any other heavy sound
Block
three. This is transistor switching this stage consist three bipolar function
transistor (BJI) with a decay circuit found using capacitor time constant (T –
RC) with a 12v Re let, it output work function is to switch the alarm circuit.
Block
four. This is the Alarm circuit, it’s function is the alarm tone. It is an
stable mutivibertor that produce 1kH2 tone frequencies which sound as alarm
signal with loud speaker which serves as an output transformer.
TABLE OF CONTENT
Title page
Approval page
Dedication
Acknowledgement
Abstract
Table of contents
CHAPTER ONE
INTRODUCTION
1.1
General description of project
1.2
Design objectives
1.3
Significance of the project
1.4
The report layout
CHAPTER TOW
LITERATURE REVIEW
2.1
Historical background of the project
2.2
Theories and models relevant to the design
2.3
List and description of the system component
2.4
Distinction between the existing method of design and
the new approach.
CHAPTER THREE
SYSTEM DESIGN
3.1
Description of the system building blocks
3.2
System design specification
3.3
Block diagram of the system
3.4
Description of the overall operation of the system
3.5
Component list
3.6
Complete circuit diagram of sound detector with alarm
system.
CHAPTER FOUR
Implementation testing and results
CHAPTER FIVE
Cost analysis conclusion and
recommendation
REFERENCE.
CHAPTER ONE
INTRODUCTION
1.1 THE GENERAL DESCRIPTION OF PROJECT
Due to
advance electron logy in the electronic which gave rise to automation of
electronic system in domestic and industrial use. This development is what gave
me the courage to choose a project topic on sound detector with alarm system.
This system employ four discreet stages with power supply namely, the pick up
microphone, Amplifier, Schmih trigger, thysistor switch circuit with rally
circuit and 1kHz turn generator which from the alarm circuit at the input of
the system a transducer which a capacitor microphone whose the function is to
piece the sound and it out put to feed in to class. A amplifier microphone
preamplifier of two transistor stage cable of amplifier the sound to a standard
were it be accepted by the schmih trigger or built using comparator with
hysterics. This comparator with hysterics is acting as amuroge to digital
convector (AID) whose one put switching between high or low conditionally. An
interface containing a transistor switching circuit with rally at it out put
such that once a sound is pick up out the input the rally is energized capable
of switching an alarm circuit on.
1.2
OBJECTIVE DESIGN
The main objective design of the project is to design and
construct an electronically operated system capable of picking sound of a
visitor at the door processing the alarm put natural sound wave to an out put
electrical sound signal to alarm signal to alert the people inside the house that some body is at the door outside, also
it help increasing the standard exposure in the practical aspect of engineering
training.
1.3 SIGNIFICANCE OF THE STUDY
The project
designed work on sound detector with alarm quite, applicable in almost every
where like industries and for domestic use for instance it could serve as audio
activated door bell for office installation also used to monitor an intruder in
our domestic places.
1.4 THE REPORT LAYOUT
For clarity
and simplicity, the report is divided into five chapters. The chapter one deals
on the introduction, which centers on general description of project, design
objectives, significance of the project and the report layout. The next chapter
which is chapter two is on the literature review which talks on the historical
background of sound detector with alarm system theories and models relevant to
the design, list and description of the system component and lastly distinction
between the existing method of design and the new approach. Chapter three is on
system design and which is all about the description of the system building
blocks, system design specification, block diagram of the system, description
of the overall operation of the system. Component list and complete circuit
diagram of a sound detector with alarm system. Chapter four is on
implementation, testing and results. Then chapter five is one cost analysis
conclusion and recommendation.
As maximum measure of
comprehensibility was ensured throughout the report. This is indicated by the
pattern of presentation and consistent system of rotation. This I believe will
ensure maximum reader satisfaction.
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