Abstract
The use of micro controller based embedded system has been drastically increased over the years. Consequently the management and monitoring job using micro controller based embedded system has been very popular due to its reduced level of complexity and maintenance. Today smart controller for controlling temperature of heater, cookers ,power plants, chemical plants, oil refining plants etc. are very common in industry. Manual temperature control and monitoring can cause an accident if the temperature becomes outside of the operating range. So there is a need for the development of the complete micro controller based smart temperature controller that will overcome the limitations of manual monitoring by personnel which in turn reduces cost of productions and losses due to damages . In this work, a complete micro controller based smart temperature controller has been developed to keep the set temperature under control and continue the production of industry. The electric circuit for the proposed system has been designed using Proteus and then it has been simulated to validate the system’s performance in varying temperature conditions. Then the prototype of the system has been implemented using the bread board and tested the desired functionality. Finally the proposed system has been miniaturized using printed circuit board (PCB).The developed system can be enhanced and commercialized in future.
CHAPTER ONE
INTRODUCTION
A micro controller based time aware oven is an automatic time control oven/cooker that monitors a preset time and regulates the oven/cooker temperature over the set time [2, 12]. If the temperature of the oven increases or reaches the set maximum, the heating element is automatically turned off, but when the temperature reduces, the heating element is also automatically turned on. This on and off activity takes place within the set time given to the controlling unit, say five minutes, and when the time runs out, the oven is automatically turned off. This is because the oven is a time conscious system. The research has an electric oven with a heating element as the heat source; it also has a micro controller system. The system uses a temperature sensor LM35 to determine the ambient temperature surrounding the oven. An oven is an enclosed compartment for heating, baking or drying. It is most commonly used in cooking and pottery. Two common kinds of modern ovens are gas ovens and electric ovens. Ovens used in pottery are also known as kilns. An oven/cooker used for heating or for industrial processes is called a furnace or industrial oven [6, 10].
In cooking, the conventional oven is a kitchen appliance and is used for roasting and heating. Food normally cooked in this manner includes meat, casseroles and baked goods such as bread, cake and other desserts. In the past, cooking ovens were fueled by wood or coal. Modern ovens are fueled by gas or electricity. When an oven is contained in a complete stove, the burners on the top of the stove may use the same or different fuel than the oven [5, 7, 8].
