Design And Construction Of A Microcontroller Based Temperature Controlled Indicator

ABSTRACT

The temperature controlled indicator system is designed with microcontroller is quite useful for conference halls, auditoriums, cinema halls, and other commercial organizations where many people gathered together, and lot of fans are required at these places. In this work, arduino is the heart of the work, which controls the temperature of any environment or device with given set points, It also displays state of the device either on or off and current temperature.

As the name implies, a microcontroller based temperature controlled indicator is an instrument used to monitor and display temperature. The temperature controller takes an input from a temperature sensor and has an output that is displayed via LCD.

TABLE OF CONTENTS

COVER PAGE

TITLE PAGE

APPROVAL PAGE

DEDICATION

ACKNOWLEDGEMENT

ABSTRACT

CHAPTER ONE

INTRODUCTION

1.1     BACKGROUND OF THE PROJECT

• AIM AND OBJECTIVES OF THE PROJECT
• SIGNIFICANCE OF THE PROJECT
• BENEFIT OF THE PROJECT
• PURPOSE OF THE PROJECT
• SCOPE OF THE PROJECT
• APPLICATION OF THE PROJECT

CHAPTER TWO – LITERATURE REVIEW

2.1     OVERVIEW OF TEMPERATURE CONTROL

2.2     REVIEW OF DIFFERENT TYPES OF TEMPERATURE CONTROLLERS AND THEIR WORKING PRINCIPLE

2.3     DEFINITION OF TEMPERATURE SENSOR

2.4     TYPES OF TEMPERATURE SENSORS

CHAPTER THREE – RESEARCH METHODOLOGY

3.1     INTRODUCTION

3.2     SYSTEM BLOCK DIAGRAM

3.3     SYSTEM CIRCUIT DIAGRAM

3.4     COMPONENTS REQUIRED

3.5     SYSTEM CIRCUIT AND WORKING

3.6     TEMPERATURE MONITOR ARDUINO CODE

3.7     POWER SUPPLY UNIT

3.8     COMPONENTS DESCRIPTION

CHAPTER FOUR

4.0       RESULT ANALYSIS

4.1     CONSTRUCTION PROCEDURE AND TESTING

4.2     CASING AND PACKAGING

4.3     ASSEMBLING OF SECTIONS

4.4    TESTING

4.5    PROBLEM ENCOUNTERED

4.6     BILL OF ENGINEERING MEASUREMENTS AND EVALUATION

CHAPTER FIVE

5.1     CONCLUSION

5.2     RECOMMENDATIONS

REFERENCES

CHAPTER ONE

1.0                                          INTRODUCTION

The main purpose of microcontroller based temperature controlled indicator system is to control the temperature of any electronic devices whose temperature keeps fluctuating and thus requires a constant watch on the device. The use of this system eliminates constant watching on the device by self controlling the temperature of the system.

Our proposed project consists of a temperature sensor for more accurate temperature control in various industries. Our system overcomes the disadvantages of thermostat/analog systems in terms of accuracy. This system can be used in any firm or organization where it is very important to maintain precise temperatures. LCD display is used to display the temperature and when the temperature exceeds the set limit, the alarm will blow in order to inform the user.

The system uses a digital temperature sensor in order to detect temperature and pass on the data to the arduino microcontroller. The arduino microcontroller processes data and sends the temperature to be displayed on LCD screen. The display is 16 *2 LCD. It consists of 2 push buttons for setting the high and low temperatures. Pressing set button allows user to increment and decrement high and low temperatures. After that the system detects temperature and switches the load when it goes beyond set limits.

1.2                          BACKGROUND OF THE PROJECT

Nowadays, the air conditioning is widely used especially in warm countries including Nigeria. Usually the conventional air conditioning is always cooling the room depending on the fixed temperature setting and is not automatically adjusted for the comfort of the users. In the central air conditioning control field, excellent real-time, high reliability, and good intelligence are proposed by many researchers. The traditional PID algorithm is, in fact, still playing a main role in the control process. The air conditioning system has becoming a field to be researched to improve the user convenience by applying intelligent system such as THERMOCOUPLE.

While the enhanced air conditioning system is being designed, the consideration of the type of control system must be included in a modeling design. In particular the controller must be able to avoid the inefficiency of having the air conditioning operate all the time. Several control options were considered at presence sensing circuit, which would turn the air conditioning off when people are not in the room with the air conditioning and a temperature sensor input, which would change the air conditioning operation depending on room temperature [1]. Based on the observation of the using the present conventional air conditioning application, it always working all the time without a systematic control. Therefore, the control of the air conditioning is adjusted through a feedback control system to monitor and maintain a constant temperature based on the data input from the sensor.

1.3                                  AIMS AND OBJECTIVE OF THE PROJECT

The main aim of this project is to build a microcontroller based temperature controlled indicator. The objectives are:

1. To monitor the temperature of a device or environment
2. To design a controller using temperature sensor.

• To analyses the performance of the

1. Real-time temperature is displayed on its LCD screen

1.4                                                                              SIGNIFICANCE OF THE PROJECT

With this system, one can remotely monitor system temperature and get the idea of whether temperature is constant / increasing / decreasing. Another and most important advantage is when temperature exceeds specified limit the alarm signal is available on output terminal. This can help in taking any immediate or automatic action

1.5                                            PURPOSE OF THE PROJECT

The main purpose of this work is to display the temperature of devices whose temperature keeps fluctuating and thus requires a constant watch on the device.

1.6                                                 SCOPE OF THE PROJECT

Below are the scopes of the project:

1. In this work, used a K-type thermocouple for direct measurements of up to 1000ºC temperature. In K-type thermocouple, the two materials used to form the junction are Chromel (Ni-Cr) and Alumel (Ni-Al). K-type is a low-cost and one of the most popular general-purpose thermocouples
2. Inside and outside room temperature are used in the controller

• The analysis controller performance in terms of automatic temperature control based on the speed of compressor of air conditioning

1. LM35 Temperature Sensor based a microcontroller based temperature controlled indicator System with arduino Microcontroller and LCD Display. In this work, the device was built to display and monitor the temperature of the surrounding or any other material to which the LM35 temperature sensor is connected for its temperature measurement in degree centigrade in a 16X2 Alphanumeric LCD

1.7                           APPLICATION OF THE PROJECT

This device can be used for temperature monitoring of appliances such as:

1. Air conditioner
2. Refrigerator

• Fan,

1. furnace etc.