Microcontroller-Based Temperature Monitoring and Control (eBook)

Dogan Ibrahim (Autor)

eBook Download: PDF

2002 | 1. Auflage
234 Seiten
Elsevier Science (Verlag)
978-0-08-047942-2 (ISBN)

Infos

"Microcontroller-Based Temperature Monitoring and Control is an essential and practical guide for all engineers involved in the use of microcontrollers in measurement and control systems. The book provides design principles and application case studies backed up with sufficient control theory and electronics to develop your own systems. It will also prove invaluable for students and experimenters seeking real-world project work involving the use of a microcontroller.

Techniques for the application of microcontroller-based control systems are backed up with the basic theory and mathematics used in these designs, and various digital control techniques are discussed with reference to digital sample theory.
The first part of the book covers temperature sensors and their use in measurement, and includes the latest non-invasive and digital sensor types. The second part covers sampling procedures, control systems and the application of digital control algorithms using a microcontroller. The final chapter describes a complete microcontroller-based temperature control system, including a full software listing for the programming of the controller.

*Provides practical guidance and essential theory making it ideal for engineers facing a design challenge or students devising a project
*Includes real-world design guides for implementing a microcontroller-based control systems
*Requires only basic mathematical and engineering background as the use of microcontrollers is introduced from first principles"

Inhalt

Cover 1
Contents 5
Preface 11
1 Microcomputer Systems 13
1.1 Introduction 13
1.2 Microcontroller systems 13
1.3 Microcontroller features 15
1.4 Microcontroller architectures 19
1.5 The PIC microcontroller family 20
1.6 Minimum PIC configuration 24
1.7 PIC16F84 microcontroller 28
1.8 PIC16F877 microcontroller 33
1.9 Using C language to program PIC microcontrollers 36
1.10 PIC C project development tools 57
1.11 Structure of a microcontroller based C program 58
1.12 Program Description Language 60
1.13 Example LCD project 63
1.14 Exercises 65
1.15 Further reading 66
2 Temperature and its Measurement 67
2.1 Temperature scales 67
2.2 Types of temperature sensors 68
2.3 Measurement errors 71
2.4 Selecting a temperature sensor 73
3 Thermocouple Temperature Sensors 75
3.1 Thermocouple types 78
3.2 Thermocouple junction mounting 80
3.3 Thermocouple insulation 80
3.4 Extension cables 81
3.5 Thermocouple response times 81
3.6 Thermocouple styles 82
3.7 Thermocouple temperature voltage relationships 83
3.8 The theory of the cold junction compensation 88
3.9 Microcontroller based practical thermocouple circuits 91
3.10 PROJECT – Measuring temperature using a thermocouple and a microcontroller 92
3.11 Exercises 96
4 RTD Temperature Sensors 99
4.1 RTD principles 99
4.2 RTD types 100
4.3 RTD temperature resistance relationship 101
4.4 RTD standards 104
4.5 Practical RTD circuits 108
4.6 Microcontroller based RTD temperature measurement 111
4.7 PROJECT – Designing a microcontroller based temperature measurement system using an RTD 112
4.8 Exercises 117
5 Thermistor Temperature Sensors 119
5.1 Thermistor principles 119
5.2 Thermistor types 120
5.3 Self-heating 122
5.4 Thermal time constant 123
5.5 Thermistor temperature-resistance relationship 123
5.6 Practical thermistor circuits 128
5.7 Microcontroller based temperature measurement 131
5.8 PROJECT – Designing a microcontroller based temperature measurement system using a thermistor 132
5.9 Exercises 138
6 Integrated Circuit Temperature Sensors 141
6.1 Voltage output temperature sensors 142
6.2 Current output temperature sensors 144
6.3 Digital output temperature sensors 146
6.4 PROJECT – Using a digital output sensor to measure the temperature 150
6.5 Exercises 154
7 Digital Control Systems and the z- transform 157
7.1 The sampling process 158
7.2 The z-transform 160
7.3 Inverse z-transform 166
7.4 The pulse transfer function 169
7.5 Exercises 180
8 Stability 183
8.1 Jury’s stability test for small systems 183
8.2 The root– locus technique 187
8.3 Digital control algorithms 191
8.4 Temperature control using digital computers 192
8.5 Digital realizations 202
8.6 Realization of the discrete PID controller 206
8.7 Problems with the standard PID controller 207
8.8 Choosing a sampling interval 209
8.9 Exercises 210
9 Case Study: Temperature Control Project 213
9.1 Overview 213
9.2 The mathematical model 214
9.3 The circuit diagram 219
9.4 Identification of the system 220
9.5 Pulse width output of the microcontroller 221
9.6 Design of a PI controller 222
9.7 Design of a PID controller 227
9.8 Compensating for heat losses 231
9.9 Other considerations 231
9.10 Exercises 231
Glossary 243
Appendix A Platinum RTD Sensor Resistances 233
Appendix B ASCII Code 235
Appendix C FED C Compiler Library Functions 239
Index 247

Produkt-Details

• Erscheint lt. Verlag: 5.8.2002
• Sprache: englisch
• Themenwelt: Informatik ► Weitere Themen ► CAD-Programme
• Themenwelt: Technik ► Elektrotechnik / Energietechnik
• Themenwelt: Technik ► Maschinenbau
• ISBN-10: 0-08-047942-1 / 0080479421
• ISBN-13: 978-0-08-047942-2 / 9780080479422