教育必须面向社会需要，培养应用型人才；教育还必须为社会发展，面向未来，培养研究型人才。在“十四五”期间，教育部要求在新时代、新形势下，把我国教育事业推向质量更好、效率更高、更加公平、更可持续发展的高度。根据这样的要求，为更贴合行业发展状况与国际交流的需要，本教材在编写过程中组织了企业专业骨干和专业教师认真地研究了高等职业教育电气自动化技术专业教学标准，又进行了广泛的社会调查，了解目前该专业状况和企业对用人能力的要求，确定了本教材课程的基本内容。

学以致用、科学合理地把实践课程和理论课程相结合是本教材的特点和目的。在理论方面，我们强调了该专业中的专业英语词汇和词组、句子结构和篇章特点，同时兼顾了专业词汇、词组与普通英语的区别，旨在打好学生的英语基本功；在实践方面，我们除了设置课后练习题，还增加了机器翻译的练习，使学生能学到如何利用现代设备进行英语学习和应用，不仅使学生在学校里就具有职业发展过程应用外语的初级能力，还为独立长远发展打好基础。

本教材分为3章，共10个单元。每个单元含3篇课文，其中：Text A注重应用实例，供学生课前自学；Text B注重该应用实例的理论基础介绍；Text C是与该应用实例有关的科普、人文文章，供学生课后补充阅读。本教材中的课文、例句基本选自国外专业书籍、刊物或权威网站，以期给学生原汁原味的感受。

Chapter One    Electrotechnics, Electronics and Components ................... 1

Unit One    Analog and Digital Circuits .................................................................... 3

Text A    Parking Aid ............................................................................................ 4

Text B    Digital Step-km Counter ................................................................. 14

Text C    The Wheatstone Bridge .................................................................. 29

Unit Two    Sensors and Measurement ............................................................... 37

Text A    Inductive Displacement Sensors ................................................... 38

Text B    Measurement, Instrument and Sensors ...................................... 43

Text C    Daniel Gabriel Fahrenheit ............................................................... 55

Unit Three    Microcontroller ................................................................................... 62

Text A    Microcontroller and Its Application ................................................ 63

Text B    Introduction to MCS-51 ................................................................... 68

Text C    Introduction to DSP .......................................................................... 79

Chapter Two    Electrotechnics, Machinery and Apparatus .................... 83

Unit Four    Motor and Its Applications ................................................................. 85

Text A    Principle of Operation of an Induction Machine ......................... 86

Text B    LIM in the Maglev Vehicle ............................................................... 91

Text C    DC Motor ........................................................................................... 100

Unit Five    Switch Electric Appliance ................................................................. 105

Text A    Principles and Applications of Circuit Breakers ....................... 106

Text B    Vacuum Circuit Breaker ................................................................. 11 3

Text C    History of SF6 Circuit Breaker ...................................................... 11 9

Unit Six    Programmable Logic Controller ........................................................ 12 3

Text A    An Example of PLC’s Application .............................................. 12 4

Text B    Features and Programming of PLC ............................................ 132

Text C    Development of PLC ...................................................................... 143

Chapter Three    Electric Automation System ............................................. 149

Unit Seven    Factory Supply and Distribution System .................................. 151

Text A    Introduction to Electric Power System ....................................... 152

Text B    Distribution Automation System (DAS) ...................................... 157

Text C    Smart Grid ........................................................................................ 165

Unit Eight    Factory Automation Monitoring System ...................................... 169

Text A    What Is Industrial Automation?..................................................... 170

Text B    What Is Automated Assembly?..................................................... 176

Text C    What Happens on a Car Assembly Line?.................................. 185

Unit Nine    Building Automation System ........................................................... 189

Text A    What Are Building Automation Systems?................................... 190

Text B    Key Elements in Intelligent Buildings ......................................... 196

Text C    The Three Dimensions of Intelligent Cities ............................... 205

Unit Ten    Distributed Control System ............................................................... 213

Text A    Introduction to Distributed Control System ............................... 214

Text B    Application of DCS in Electric Power System .......................... 221

Text C    Wireless Sensor Network .............................................................. 226

参考文献 ......................................................................................................................... 230

Appendix    电气自动化专业常用英语缩略语 ........................................................... 231