Design And Construction Of Motion Activated AC Switch

ABSTRACT

Motion detector detects moving objects, particularly people. A motion detector is often integrated as a component of a system that automatically performs a task or alerts a user of motion in an area. Motion detectors form a vital component of automated lighting control. Its use is to illuminate an area when a person walks by so that he or she can see well. Many people place motion detectors in their backyards or even in their houses so that when they walk through that area, the AC lights will automatically turn on. 

TABLE OF CONTENTS

TITLE PAGE

APPROVAL PAGE

DEDICATION

ACKNOWELDGEMENT

ABSTRACT

TABLE OF CONTENT

CHAPTER ONE

• INTRODUCTION
• BACKGROUND OF THE STUDY
• PROBLEM STATEMENT
• AIM/OBJECTIVE OF THE PROJECT
• SIGNIFICANCE OF THE PROJECT
• SCOPE OF THE PROJECT
• LIMITATION OF THE PROJECT
• APPLICATION OF THE PROJECT
• ADVANTAGES OF THE PROJECT
• PROJECT ORGANISATION

CHAPTER TWO

LITERATURE REVIEW

2.0      LITERATURE REVIEW

2.1     REVIEW OF PIR SENSORS AND ITS APPLICATION

2.2     THE ROLE OF SENSORS IN YOUR HOME SECURITY

2.3     TYPES OF MOTION SENSORS

2.4       OTHER MOTION SENSOR FEACTURES

CHAPTER THREE

3.0      CONSTRUCTION METHODOLOGY

3.1      BLOCK DIAGRAM OF THE SYSTEM

3.2      CIRCUIT DIAGRAM

3.3      CIRCUIT DESCRIPTION

3.4      SYSTEM OPERATION

3.5     COMPONENTS LIST

3.6     DESCRIPTION OF MAJOR COMPONENTS USED

CHAPTER FOUR

4.0       RESULT ANALYSIS

4.1      CONSTRUCTION PROCEDURE AND TESTING

4.2      ASSEMBLING OF SECTIONS

4.3      CONSRUCTION OF THE CASING

4.4     TESTING

CHAPTER FIVE

• CONCLUSIONS
• RECOMMENDATION

5.3     REFERENCES

CHAPTER ONE

1.1                                                        INTRODUCTION

The motion detector is not only used as intruder alarm but also used in many applications like home automation system, energy efficiency system, etc. The motion detector will detect the motion of the people or objects and give the appropriate output according to the circuit. In general, motion detector uses different types of sensors like Passive infrared sensor (which will detect the motion of the person using the person body heat), microwave sensor (Microwave sensor will detect the motion of person by measuring the change in frequency from the produced beam), ultrasonic sensor (It produces acoustic signals which will detect the motion of a person) etc.  There are some motion detectors which will use different technology and include number of sensors (PIR, microwave sensor, ultrasonic sensor, etc.) to reduce the false triggering and increase the accuracy in motion detection.

1.2                                         BACKGROUND OF THE PROJECT

The first motion detector was invented in the early 1950s by Samuel Bango, and which was a burglar alarm. He applied the fundamentals of a radar to ultrasonic waves – a frequency to detect fire or thief and that which human beings cannot hear. Samuel motion detector is based on the principle of Doppler Effect. Nowadays, most of the motion detectors work on the principle of Samuel Bango’s detector. IR sensors and microwave sensors can detect motion by the alterations in the frequencies they emit.

Motion detectors are used as security systems in banks, offices and shopping malls, and also as intruder alarm in home. The prevailing motion detectors can stop serious accidents by sensing the persons who are in close proximity to the detector. We can observe motion detectors in shopping malls or stores with automatic doors. The main element in the motion detector circuit is the dual infrared reflective sensor or any other detecting sensor.

An electronic motion detector contains an optical, microwave, or acoustic sensor, and in many cases a transmitter for illumination. However, a passive sensor only senses a signal emitted by the moving object itself. Changes in the optical, microwave, or acoustic field in the device’s proximity are interpreted by the electronics based on one of the technologies listed below. Most inexpensive motion detectors can detect up to distances of at least 15 feet (5 meters). Specialized systems are more expensive but have much longer ranges. Tomographic motion detection systems can cover much larger areas because the radio waves are at frequencies which penetrate most walls and obstructions, and are detected in multiple locations, not just at the location of the transmitter.

Motion detectors have found wide use in domestic and commercial applications. One common application is activation of automatic door openers in businesses and public buildings. Motion sensors are also widely used in lieu of a true occupancy sensor in activating street lights or indoor lights in walkways (such as lobbies and staircases). In such “Smart Lighting” systems, energy is conserved by only powering the lights for the duration of a timer, after which the person has presumably left the area. A motion detector may be among the sensors of a burglar alarm that is used to alert the home owner or security service when it detects the motion of a possible intruder. Such a detector may also trigger a security camera in order to record the possible intrusion.

1.3                                                  PROBLEM STATEMENT

Manual operation of an AC switch involves labour, waste of time and also can expose the user to electric shock. In order to solve these problems this device was invented which switches ON or OFF of an AC light at the detection of human close to the sensor.

1.4                                   AIM AND OBJECTIVE OF THE PROJECT

The main aim of this work is construct a motion sensor that is use is to illuminate an area when a person walks by so that he or she can see well. Many people place motion activated ac switch in their backyards or even in their houses so that when they walk through that area, the lights will automatically turn on. The objectives are:

1. To build this device that automatically switches ON or OFF an AC light.
2. To save energy

• To reduce human labour

1. To increase security
2. To protect user from electric shock

1.5                                         SIGNIFICANCE OF THE PROJECT

A motion sensor (or motion detector) is the top dog of your security system, because it is the main device that detects when someone is in your home when they should not be. A motion sensor uses one or multiple technologies to detect movement in an area. If a sensor is tripped, a signal is sent to your security system’s control panel, which connects to your monitoring center, alerting you and the monitoring center to a potential threat in your home.

1.6                                              PURPOSE OF THE PROJECT

The main purpose of motion sensor is to sense person’s movement then lighten the environment the movement was detected.

Its use is to illuminate an area when a person walks by so that he or she can see well. Many people place motion detectors in their backyards or even in their houses so that when they walk through that area, the lights will automatically turn on.

1.7                                          APPLICATION OF THE PROJECT

Motion activated ac switch stand guard, ready to react to various situations, such as movement in your living room, windows or doors being opened or closed, or a broken window. Thus, motion sensor lights are very popular and being increased in use. Businesses use them all the time such as for bathrooms, when a person walks in, the lights turn on. Or many times they are used in grocery stores for when you pass through an aisle or open up a refrigerator door in the freezer aisles. The applications are numerous.

Motion sensors can:

• Alert you in the event that your teen breaks curfew
• Trigger a doorbell when someone approaches the front door
• Alert you when kids enter restricted areas in the home, like the basement, workout room, or medicine cabinet
• Save energy by using motion sensor lighting in unoccupied spaces
• Notify you if pets enter areas where they’re not supposed to be

1.8                                       LIMITATIONS OF THE PROJECT

Motion sensors have some problem:

1. it has a limited distance to detect the motion
2. if a motion sensor for the automatic door is not mounted securely, normal vibration, sign, plants and neon light can trigger the door open.

• It cannot detect the small objects such as insects or raindrop.

1. Things may trigger the motion detector that you don’t want to. An outside detector mounted too close to a light that stays on at night, will be triggered continuously by bugs.
2. The set shutoff time of the motion sensor may be too short (maybe only 30 seconds). For outside lights with a motion detector, if you want more “on time”, it’s best to buy a model with an adjustable shutoff time.
3. The reliability of a motion sensor may also be affected by rapid environmental changes and direct sunlight. Also, things like a fireplace, and direct wind from an air conditioner or heater. This is because a PIR sensor actually detects changes in infrared energy – specifically, the “heat energy” emitted by normal human skin temperature.

 

1.8                          PROJECT WORK ORGANISATION

The various stages involved in the development of this project have been properly put into five chapters to enhance comprehensive and concise reading. In this project thesis, the project is organized sequentially as follows:

Chapter one of this work is on the introduction to motion sensor. In this chapter, the background, significance, objective limitation and problem of a motion sensor system were discussed.

Chapter two is on literature review of motion sensor. In this chapter, all the literature pertaining to this work was reviewed.

Chapter three is on design methodology. In this chapter all the method involved during the design and construction were discussed.

Chapter four is on testing analysis. All testing that result accurate functionality was analyzed.

Chapter five is on conclusion, recommendation and references.