Abstract: This paper discusses the important role of mechatronics technology in changing the face of the entire machinery manufacturing industry, and explains its application and development trend in the steel industry. Keywords: Mechatronics, technology, application 1 Development of Mechatronics Technology Mechatronics is a cross-disciplinary integration of mechanics, microelectronics, control, computer science, and information processing. Its development and progress depend on the advancement of related technologies. Its main development directions include digitalization, intelligence, modularization, networking, humanization, miniaturization, integration, power generation, and greening. 1.1 Digitalization Microcontrollers and their development have laid the foundation for the digitalization of mechatronic products, such as the continuously developing CNC machine tools and robots; while the rapid rise of computer networks has paved the way for digital design and manufacturing, such as virtual design and computer-integrated manufacturing. Digitalization requires the software of mechatronic products to have high reliability, ease of operation, maintainability, self-diagnostic capabilities, and a user-friendly human-machine interface. The realization of digitalization will facilitate remote operation, diagnosis, and repair. 1.2 Intelligence This requires mechatronics products to have a certain degree of intelligence, enabling them to have abilities similar to human logical thinking, judgment, reasoning, and autonomous decision-making. For example, adding human-machine dialogue functions, setting up intelligent I/O interfaces and intelligent process databases on CNC machine tools will greatly facilitate use, operation, and maintenance. With the advancement and development of artificial intelligence technologies such as fuzzy control, neural networks, grey theory, wavelet theory, chaos and bifurcation, a vast world has been opened up for the development of mechatronics technology. 1.3 Modularization Due to the large variety of mechatronics products and manufacturers, researching and developing mechatronics product unit modules with standard mechanical interfaces, power interfaces, and environmental interfaces is a complex but promising task. For example, developing a power drive unit integrating reduction and variable frequency speed control motors; or an integrated motor control unit with vision, image processing, recognition, and ranging functions. In this way, new products can be quickly developed using these standard modular units during product development and design. 1.4 Networking Due to the widespread use of networks, various network-based remote control and monitoring technologies are flourishing. Remote control terminal equipment is itself a mechatronics product. Fieldbus and LAN technologies make networking home appliances possible. By connecting various home appliances into a computer-centric integrated home appliance system using a home network, people can fully enjoy the benefits of various high technologies at home. Therefore, mechatronics products should undoubtedly develop towards networking. 1.5 Humanization The ultimate users of mechatronics products are humans. How to imbue these products with human intelligence, emotion, and humanity is becoming increasingly important. Besides perfect performance, mechatronics products also require harmony with the environment in terms of color and shape. Using these products is also an artistic enjoyment for people; for example, the ultimate goal of home robots is human-machine integration. 1.6 Miniaturization Miniaturization is an inevitable trend in the development of precision manufacturing technology and a necessity for improving efficiency. Micro-Electronic Mechanical Systems (MEMS) refer to miniaturized devices or systems that can be mass-produced, integrating micro-mechanisms, micro-sensors, micro-actuators, signal processing and control circuits, and even interfaces, communication, and power supplies. Since Stanford University developed the first medical microprobe in 1986 and the University of California, Berkeley developed the first micromotor in 1988, significant progress has been made both domestically and internationally in MEMS technology, materials, and microscopic mechanism research. Various MEMS devices and systems have been developed, such as various micro-sensors (pressure sensors, micro-accelerometers, micro-tactile sensors) and various micro-components (microfilms, microbeams, microprobes, micro-links, micro-gears, micro-bearings, micro-pumps, micro-springs, and micro-robots, etc.). 1.7 Integration Integration encompasses the mutual penetration and fusion of various technologies and the optimization and combination of different product structures. It also includes simultaneously handling multiple processes such as processing, assembly, testing, and management during production. To achieve automation and high efficiency in multi-variety, small-batch production, the system should possess broader flexibility. Firstly, the system can be decomposed into several layers, distributing system functions and ensuring the coordinated and safe operation of each part. Then, through software and hardware, the various layers are organically linked to optimize performance and maximize functionality. 1.8 Self-Powered Mechatronics This refers to mechatronic products that possess their own energy source, such as solar cells, fuel cells, and high-capacity batteries. Since electricity is often unavailable, self-powered systems offer unique advantages for moving mechatronic products. Self-powered systems are one of the development directions for mechatronic products. 1.9 Green Development The development of science and technology has brought tremendous changes to people's lives, but while material abundance has increased, it has also led to resource depletion and ecological degradation. Therefore, people are calling for environmental protection, a return to nature, and sustainable development. The concept of green products emerged in response to this call. Green products refer to products that are low in energy consumption, low in material consumption, low in pollution, comfortable, harmonious, and recyclable. Their design, manufacturing, use, and disposal should meet environmental protection and human health requirements. The greening of mechatronic products mainly refers to their ability to avoid polluting the ecological environment during use and to ensure that the product can be decomposed and recycled at the end of its lifespan. 2. Application of Mechatronics Technology in Steel Enterprises In steel enterprises, mechatronics systems are centered around microprocessors, organically combining microcomputers, industrial control computers, data communication, display devices, and instruments. This assembly and integration approach creates favorable conditions for the comprehensive integration of large-scale engineering systems, enhancing system control accuracy, quality, and reliability. Mechatronics technology is mainly applied in the following aspects in steel enterprises: 2.1 Intelligent Control Technology (IC) Due to the large-scale, high-speed, and continuous nature of the steel industry, traditional control technologies face insurmountable difficulties, making the adoption of intelligent control technology essential. Intelligent control technologies mainly include expert systems, fuzzy control, and neural networks. These technologies are widely applied in various aspects of steel enterprises, including product design, production, control, and equipment and product quality diagnosis, such as blast furnace control systems, electric furnaces and continuous casting workshops, rolling mill systems, integrated scheduling systems for steelmaking-continuous casting-rolling, and cold continuous rolling. 2.2 Distributed Control System (DCS) A distributed control system uses a central computer to command several control-oriented field measurement and control computers and intelligent control units. Distributed control systems (DCS) can be two-level, three-level, or more. They utilize computers for centralized monitoring, operation, management, and decentralized control of production processes. With the development of measurement and control technology, the functions of DCSs are becoming increasingly diverse. They can not only achieve production process control but also online optimization, real-time production process scheduling, and production plan statistical management, becoming an integrated system of measurement, control, and management. DCSs are characterized by diverse control functions, ease of operation, system expandability, convenient maintenance, and high reliability. DCSs feature centralized monitoring and decentralized control, resulting in a small impact from faults. Furthermore, the system has interlocking protection functions and employs manual control measures for system faults, ensuring high system reliability. Compared to centralized control systems, distributed control systems are more powerful and have higher security. They represent the current mainstream trend in large-scale mechatronics systems. 2.3 Open Control System (OCS) An Open Control System (OCS) is a new structural concept introduced by the development of computer technology. "Open" signifies consensus and support for a standard information exchange procedure. Systems designed according to this standard can achieve compatibility and interchangeability between products from different manufacturers and share resources. Open control systems interconnect various control devices and management computers through industrial communication networks, achieving integration of control with operation, management, and decision-making. Fieldbuses connect field instruments with control room equipment, achieving integrated measurement and control. 2.4 Computer Integrated Manufacturing System (CIMS) In steel enterprises, CIMS integrates people with production operations, production management, and process control to achieve global and integrated control of the entire production process, from raw material intake and processing to product delivery. Currently, steel enterprises have largely achieved process automation, but this "island-like" single-machine automation lacks information resource sharing and unified production process management, making it difficult to meet the requirements of modern steel production. The future focus of competition for steel enterprises will be multi-variety, small-batch production, high quality and low price, and timely delivery. To improve productivity, save energy and reduce consumption, reduce personnel and existing inventory, accelerate capital turnover, and achieve overall optimization of production, operation, and management, the key is to strengthen management, obtain necessary economic benefits, and improve the enterprise's competitiveness. Some large steel enterprises in the United States and Japan widely implemented CIMS in the 1980s. 2.5 Fieldbus Technology (FBT) Fieldbus technology is a digital, bidirectional, multi-station communication link connecting field instruments to control equipment in the control room. Replacing existing signal transmission technologies (such as 4-20mA, DC transmission) with fieldbus technology enables more information to be transmitted bidirectionally between intelligent field instruments and higher-level control systems over a common communication medium. Fieldbus connections can eliminate 66% or more of the field signal connection wires. The introduction of fieldbus has led to a revolution in DCS and the development of a new generation of fieldbus-based instruments for open automation systems, such as intelligent transmitters, intelligent actuators, fieldbus-based detection instruments, fieldbus-based PLCs (Programmable Logic Controllers), and local control stations. 2.6 AC Drive Technology Drive technology plays a crucial role in the steel industry. With the development of power electronics and microelectronics technologies, AC speed control technology has developed very rapidly. Due to the superiority of AC drives, AC drives will soon completely replace DC drives in electrical drive technology. The development of digital technology has made complex vector control techniques practical, and the speed regulation performance of AC speed control systems has reached and surpassed that of DC speed control. Now, reversible and smooth speed regulation can be achieved using synchronous or asynchronous motors, regardless of whether the motor is large or small. AC drive systems have been welcomed by users since their introduction in steel rolling production, and their application continues to expand.