10-11-2012, 04:56 PM
control system
[attachment=39000]
Introduction:
A control system is a device or set of devices to manage, command, direct or regulate the
behavior of other devices or systems. So now-a-days every system is automated in order
to face new challenges.
In the present days automated systems have less manual operations, flexibility, reliability
and are accurate. Due to this demand every field prefers automated control systems
especially in the field of electronics automated systems are giving good performance.
This project is about controlling a street light with out human interference using a
Microcontroller, RTC and Relays. The street light automatically switches on/off
according to the user’s need.
Aim of the Project:
To design and develop user friendly firmware for auto on/off switching without any
human interference. We know that Automation plays an important role in the field of
industrial electronics. In the bandwagon of automation the consumption of energy can be
reduced to a high degree. As, energy conservation is picked up paramount importance,
our effort to conserve energy in “Energy Conservation” involves avoiding wastage of
energy and adopting methods to save energy without sacrificing our comforts and needs.
Show accuracy and flexibility of lighting control that will enable the elimination of waste
and the 'fine tuning' of burning hours, leading to energy cost savings.
Methodology:
The working of STREETLIGHT AUTOMATION SYSTEM is as follows:
Initially the 230V ac supply is sent to the step down transformer and the voltage level
gets reduced to the order of 19V.This is then regulated by using a series of voltage
regulators to obtain 5V DC voltage.
This voltage is sufficient for the pic microcontroller to get activated. RTC and LCD are
interfaced to Pic microcontroller by using some pull up resistors. The timing data is
entered into the micro controller through a series of switches, S2, S3, S4 and S5. This is
sent to the RTC and LCD using the same multiplexed address data bus. The RTC and
LCD are enabled using the control pins of the pic microcontroller. When the set time of
the PIC microcontroller matches with that of the RTC, the microcontroller sends a signal
and activates one of its pin which is in turn connected to a relay, through a series of
buffers. This relay is further connected to a contactor, in the power saver, which controls
the power supply to the street lights. In this way the street light automation system works
based on the timings set by the user.
ORGANISATION OF THE REPORT:
Chapter 1 is the introduction to the main board. The methodology gives an idea of
how the system is automated.
Chapter 2 comprehensively, covers the microcontroller core module with its features,
architecture and its working in detail.
Chapter 3 gives the introduction of modules such as LCD, DS 12C887 RTC, Crystal
oscillator, Relays, Printed circuit board and their explanation.
Chapter 4 elucidates on circuit layout, the hardware connections, design of each
circuit and its operation.
Chapter 5 implementation is done with flowchart that explains the flow of program
and their functions.
Chapter 6 is results, conclusions and the future scope is touched upon.
SIGNIFICANCE AND APPLICATIONS:
Street light controller features
Micro controller based
Photo sensor implemented
Two line LCD display
IP:55 protection
Power consumption less than 1 watt
Protected from spikes and surges
Protected from wide voltage fluctuation
Overload protection
Short circuit protection
Withstands wide temp. variation 5 deg.C to 60 deg.c
High accurate timer
[attachment=39000]
Introduction:
A control system is a device or set of devices to manage, command, direct or regulate the
behavior of other devices or systems. So now-a-days every system is automated in order
to face new challenges.
In the present days automated systems have less manual operations, flexibility, reliability
and are accurate. Due to this demand every field prefers automated control systems
especially in the field of electronics automated systems are giving good performance.
This project is about controlling a street light with out human interference using a
Microcontroller, RTC and Relays. The street light automatically switches on/off
according to the user’s need.
Aim of the Project:
To design and develop user friendly firmware for auto on/off switching without any
human interference. We know that Automation plays an important role in the field of
industrial electronics. In the bandwagon of automation the consumption of energy can be
reduced to a high degree. As, energy conservation is picked up paramount importance,
our effort to conserve energy in “Energy Conservation” involves avoiding wastage of
energy and adopting methods to save energy without sacrificing our comforts and needs.
Show accuracy and flexibility of lighting control that will enable the elimination of waste
and the 'fine tuning' of burning hours, leading to energy cost savings.
Methodology:
The working of STREETLIGHT AUTOMATION SYSTEM is as follows:
Initially the 230V ac supply is sent to the step down transformer and the voltage level
gets reduced to the order of 19V.This is then regulated by using a series of voltage
regulators to obtain 5V DC voltage.
This voltage is sufficient for the pic microcontroller to get activated. RTC and LCD are
interfaced to Pic microcontroller by using some pull up resistors. The timing data is
entered into the micro controller through a series of switches, S2, S3, S4 and S5. This is
sent to the RTC and LCD using the same multiplexed address data bus. The RTC and
LCD are enabled using the control pins of the pic microcontroller. When the set time of
the PIC microcontroller matches with that of the RTC, the microcontroller sends a signal
and activates one of its pin which is in turn connected to a relay, through a series of
buffers. This relay is further connected to a contactor, in the power saver, which controls
the power supply to the street lights. In this way the street light automation system works
based on the timings set by the user.
ORGANISATION OF THE REPORT:
Chapter 1 is the introduction to the main board. The methodology gives an idea of
how the system is automated.
Chapter 2 comprehensively, covers the microcontroller core module with its features,
architecture and its working in detail.
Chapter 3 gives the introduction of modules such as LCD, DS 12C887 RTC, Crystal
oscillator, Relays, Printed circuit board and their explanation.
Chapter 4 elucidates on circuit layout, the hardware connections, design of each
circuit and its operation.
Chapter 5 implementation is done with flowchart that explains the flow of program
and their functions.
Chapter 6 is results, conclusions and the future scope is touched upon.
SIGNIFICANCE AND APPLICATIONS:
Street light controller features
Micro controller based
Photo sensor implemented
Two line LCD display
IP:55 protection
Power consumption less than 1 watt
Protected from spikes and surges
Protected from wide voltage fluctuation
Overload protection
Short circuit protection
Withstands wide temp. variation 5 deg.C to 60 deg.c
High accurate timer