Description
INTRODUCTION
Traditionally, high control in home and office environments takes place through switches (on/off), deals and sliders (dimmers) and sometimes motion sensors. These controls can be incorporated in the built environment such as walls, or attached to lights that people place themselves (desk lamps, bed side lights). This often leads to a jumble of controls each with their own location, interaction style, and focus. This project is a demonstration of how a PC can be used as a control signal generation subsystem capable of generating programmable control signals for power equipment. Early studies reveal that using PC for power management was often fou7nd to be up to 25% more than energy star compliant methods.
However, recent assessments have found higher rates, and was estimated that
for power management. Switching control is a good replacement for conventional pneumatic or Electro chemical high voltage AC control. This equipment is capable of not only control but energy management and system diagnostic functions. The PC control in inherentlyhas more accurate control because it reduces maintenance and recalibration problems common with pneumatic and mechanical systems. It offers other unique advantages like subsystem coordination, optimum start, diversity analysis and retrofit identification.
This design begins with the fact that a computer is needed to light bulbs of high AC rating. This immediately suggests that an interface of the PC is needed to handle the mismatch in voltage and currents between the PC and bulbs. Secondly the control data from the PC program are logic levels in serial format and at high frequency. This again means that the interface should understand the protocol of communication and convert it to the necessary parallel control singed. Due to lack of resources, the project will not be real but simulated. This system will represent for more than just manual on/off control. The system comprises of two major components, output device, and input device. Output devices work behind the scenes to control the lights by switching them off or on. Input device are the switcher i.e. the button or sensors.
TABLE OF CONTENT
CHAPTER ONE
Introduction
Background Of The Study
Problem Statement
Objectives Of Study
Significance Of Study
Scope Of Study
Limitation Of Study
Definition Of Terms
CHAPTER TWO
Literature Review
Introduction
Itches
Mechanical Switches (Hand Switches)
Limit Switches
Process Switch
Electronics Switches/Logic Switches
Computers As A Switch
Serial Ports
Typical Locations For Serial Ports
I/0 Interfaces From Serial And Parallel To Ieee 1394 And Usb
CHAPTER THREE
System Analysis And Methodology
Introduction
Analysis Of The Existing System
Advantages Of The Existing System
Disadvantages Of The Existing System
Justification Of The Proposed System
Advantages Of The Proposed System
Disadvantages Of The Proposed System
Connecting The Port To External Device Interface
Connecting Max 232 To The Serial Part
Dc Voltage Change With Cable
Ac And Dc Voltage With Data
Relay Stage
Relays
Choosing A Relay
Protection Diodes For Relays
Reed Relays
Relays And Transistors Compared
Advantages Of Relays
Disadvantages Of Relays
Research Methodology
The Diagram Below Shows The Pin-Out Of The 8051 Micro Controllers
Basic -52 Functions
Element Of The 8051
Power Supply The Ac Voltage
Transformer
CHAPTER FOUR
System Design And Impletation
Introduction
Over View Of Design
Main Menu
Program Modules Specification
Input/Output Specification
Choice And Justification Of Programming Language
System Requirement
Implementation Plans
Maintenance Details
CHAPTER FIVE
Conclusion And Recommendation
Summary
Conclusion
Recommendation
Suggestion For Further Studies
References
Appendix 1
Appendix 2
Source Code