24-12-2012, 04:13 PM
Design of An Embedded System For Monitoring and Controlling Temperature and Light
[attachment=45143]
Abstract
Each and every part of our life is somehow linked with the embedded
products. Embedded systems are the product of hardware and software
codesign.Embedded system is becoming an integral part of Engineering design
process for efficient analysis and effective operation. From data analysis to
hardware work, every where embedded products are the main interest because
of its reliability and time bound perfection. There is not much time with
anyone now a day to give enough in all aspects, so demand of embedded
products which serve as we want is high on demand. The present paper
describes the design of an embedded system for the control of Temperature &
Light intensity with continuous monitoring in a single system using sensors,
microcontroller and LCD.It describes the controlling action incorporated in the
hardware to control any device connected when specific conditions are met.
Further set up is made such that data can be stored for future offline analysis.
Introduction
It is very much essential in case of some industrial as well as experimental setup to
monitor as well as control temperature and light continuously. The efficient solution
for this problem is to develop a data logger. Earlier development of data logger was
done through manual measurements from analog instruments such as thermometers
and manometers. Unfortunately this type of data logger can’t fulfill the current
requirements in terms of time and accuracy. From 1990 a further development in data logging took place as people begin to create PC-based data logging systems [1]. In
later stage of development it has been found that microcontrollers (integration of
microprocessors and certain peripherals including memory on single chip) are more
reliable as well as efficient [2]. Use of microcontrollers in embedded design is not
only increased but brought a revolutionary change. At the same time competitive
pressures require manufacturers to expand their product functionality and provide
differentiation while maintaining or reducing the cost
Motivation
Main cause of doing this project is its low cost and industrial demand. Such a design
can effectively decrease the number of computers used in an industry such as food
processing, green house or a packing industry & thus in turn can save power which is
the main feature of this project.
Software description
Software development for the project consists of two main modules one being the
online monitoring and controlling and other offline analysis based on data stored in
computer .Presently this paper limits its work on first module keeping second module
for future development Software is developed in both C and Assembly language.
Results and Conclusion
In this system, temperature measurement and light intensity from the ADC channels
are taken. The performances of the channels are distinguished on the basis of its
accuracy. The accuracy indicates how closely the sensor can measure the actual or
real world parameter value. The more accurate a sensor is, better it will perform. To
achieve this, calibration is done with a standard digital thermometer and since LM35
is a linear device so calibration process yields good result (for each degree rise, 10mV
is the rise). Then temperature displayed in LCD is compared with the standard
temperature from digital thermometer at an interval of 1hour and results are compared
& shown graphically below
[attachment=45143]
Abstract
Each and every part of our life is somehow linked with the embedded
products. Embedded systems are the product of hardware and software
codesign.Embedded system is becoming an integral part of Engineering design
process for efficient analysis and effective operation. From data analysis to
hardware work, every where embedded products are the main interest because
of its reliability and time bound perfection. There is not much time with
anyone now a day to give enough in all aspects, so demand of embedded
products which serve as we want is high on demand. The present paper
describes the design of an embedded system for the control of Temperature &
Light intensity with continuous monitoring in a single system using sensors,
microcontroller and LCD.It describes the controlling action incorporated in the
hardware to control any device connected when specific conditions are met.
Further set up is made such that data can be stored for future offline analysis.
Introduction
It is very much essential in case of some industrial as well as experimental setup to
monitor as well as control temperature and light continuously. The efficient solution
for this problem is to develop a data logger. Earlier development of data logger was
done through manual measurements from analog instruments such as thermometers
and manometers. Unfortunately this type of data logger can’t fulfill the current
requirements in terms of time and accuracy. From 1990 a further development in data logging took place as people begin to create PC-based data logging systems [1]. In
later stage of development it has been found that microcontrollers (integration of
microprocessors and certain peripherals including memory on single chip) are more
reliable as well as efficient [2]. Use of microcontrollers in embedded design is not
only increased but brought a revolutionary change. At the same time competitive
pressures require manufacturers to expand their product functionality and provide
differentiation while maintaining or reducing the cost
Motivation
Main cause of doing this project is its low cost and industrial demand. Such a design
can effectively decrease the number of computers used in an industry such as food
processing, green house or a packing industry & thus in turn can save power which is
the main feature of this project.
Software description
Software development for the project consists of two main modules one being the
online monitoring and controlling and other offline analysis based on data stored in
computer .Presently this paper limits its work on first module keeping second module
for future development Software is developed in both C and Assembly language.
Results and Conclusion
In this system, temperature measurement and light intensity from the ADC channels
are taken. The performances of the channels are distinguished on the basis of its
accuracy. The accuracy indicates how closely the sensor can measure the actual or
real world parameter value. The more accurate a sensor is, better it will perform. To
achieve this, calibration is done with a standard digital thermometer and since LM35
is a linear device so calibration process yields good result (for each degree rise, 10mV
is the rise). Then temperature displayed in LCD is compared with the standard
temperature from digital thermometer at an interval of 1hour and results are compared
& shown graphically below