24-10-2016, 02:23 PM
1460813821-ENERGYEFFICIENTSMARTSTREETLIGHTING1.pptx (Size: 1.33 MB / Downloads: 7)
abstract
In the present scenario, High Intensity Discharge(HID) lamps are being used for street lights. These lamps consume a lot of power.
Generally, street lights are ON throughout the night even when there is no traffic on the road which is a wastage of electricity.
To conserve electricity we switch to automation of street lights using dimmable LEDs.
LDR is used to switch ON the system only during the night time. As night sets in, the system gets activated and the LEDs glow with 10% intensity when there is no traffic on the road.
When motion is sensed by the PIR sensor, the intensity of LEDs switches to 100%.
When the vehicle has passed the LEDs revert to 10% intensity.
The hardware components used are – MSP430G2553 microcontroller, LDR, PIR sensor, LED driver and LED strip.
The programming is done in Assembly Language using IAR Embedded Workbench.
INTRODUCTION
Automation is virtually required so that a process occurs in a faster, safer, reliable and with greater precision.
Automation means to make a system smart. Smart street lighting is necessary so as to control the wastage of energy that occurs as they remain ON throughout the night.
Operation of street lights using LDR is common these days. But the limitation with these ordinary street lights is that it lacks smart performance. Therefore, it is essential to automate the system so as to conserve electricity.
In the proposed system the conventional HID lamps are replaced by dimmable LEDs as they are more efficient in conserving energy.
objective
This project aims to build a smart street lighting system with integrated sensors and controllers so as to reduce the man power and conservation of electricity, which is a non-renewable source of energy.
This includes using a high speed and cost effective microcontroller which consumes very less power.
Designing a smart street lighting system with modular approach design, which makes the system scalable and expandable, which is achieved by using dimmable LEDs instead of the conventional High Intensity Discharge (HID) lamps.
The intensity of LEDs is varied using PWM for which the code is written in Assembly Language.
Literature surveys
The following are the literature surveys of “Energy Efficient Smart Street Lighting System”:
SMART STREET LIGHTING SYSTEM:
Smart street lighting system supports green environmental related works. This system integrates Wireless Sensor Network(WSN) concept in the development, utilizing Waspmote as sensor node. The sensor node can be used to monitor the running status information, amount of energy used and dimming time of street light for logging purposes. This system saves energy by controlling the light intensity using Pulse Width Modulation(PWM) technique.
AUTOMATIC STREET LIGHTING SYSTEM FOR ENERGY EFFICIENCY ON LOW COST MICROCONTOLLER:
This system proposes energy efficient automatic street lighting system based on a low cost microcontroller. The main objective is to design energy efficient based controller for controlling the LED based street lamp via appropriate lighting levels control. This system consists of a microcontroller, light sensor, rain sensor, laser sensor and a set of LED module. The controlling and managing of the system is based on the number of traffic and different level of street light brightness which have been used for lighting up the street and proportional to the number of traffic. The system is programmed
Software details
IAR EMBEDDED WORKBENCH
The software used in this project is IAR Embedded Workbench using assembly language.
IAR Embedded workbench incorporates a compiler, an assembler, a linker and a debugger into one integrated development environment. This gives an uninterrupted work flow and a single toolbox in which all components integrate seamlessly.
IAR Embedded Workbench is a powerful project manager.
ASSEMBLY LANGUAGE
It is the first step to improve the programming structure.
An Assembly Language is a low level programming language for a computer.
Assembly Language is converted into executable machine code by a utility program referred to as an assembler.
The advantages are:
(1) The symbolic programming of assembly language is easier to understand and saves a lot of time and effort of the programmer.
(2)It is easier to correct errors and modify program instructions.
Progress of the project
The detailed design of the project is formulated with the conspicuous requirements.
The block diagram is sketched with respect to the signal flow of the system.
The circuit diagram is designed taking an account the appropriate components that are required which suit best to the proposed project.
Project work to be done
The coding is to be done.
The assembling of components and interfacing with the microcontroller.
Representation of the code in flowchart .
Implementation and testing of the system.