Intelligent, open, networked, and information-oriented become the main trends in the development of CNC systems and CNC machine tools in the future: to the direction of high speed, high efficiency, high precision, high reliability; to modular, intelligent, flexible, networked and Development of integration; development towards PC-based and open; emergence of a new generation of CNC machining processes and equipment, development of machining to virtual manufacturing; integration of information technology (IT) and machine tools, advanced mechatronics machine tools Get development; nanotechnology will form a new development trend, and there will be new breakthroughs; energy-saving and environmentally-friendly machine tools will accelerate development and occupy the vast market.
7. The industrial control network will develop in the direction of combining wired and wireless.
Since the first civil network system ARCnet was put into operation in 1977, wired LAN has been successful and rapidly developed with its wide applicability and technical price advantages. However, in industrial sites, some industrial environments prohibit, restrict the use of cables or difficult to use cables, and wired LANs are difficult to function, so wireless LAN technology has been developed and applied.
With the continuous development of microelectronics technology, wireless LAN technology will play an increasingly important role in industrial control networks.
Wireless LAN technology can connect network devices wirelessly very conveniently. People can access network resources at any time, anywhere, and at will, which is an important direction for the development of modern data communication systems. The WLAN can provide Ethernet connectivity without the use of a network cable. While promoting the development of network technology, wireless LAN is also changing the way people live. Wireless network communication protocols usually use IEEE802.3 and 802.11. 802.3 is used for point-to-point mode, and 802.11 is used for point-to-multipoint mode. The wireless local area network can be realized on the basis of the ordinary local area network through the wireless hub, the wireless access station (AP), the wireless bridge, the wireless modem and the wireless network card, etc., and the wireless network card is most commonly used. The future research direction of WLANs focuses on issues such as security, mobile roaming, network management, and other mobile communication systems such as 3G.
In the field of industrial automation, there are thousands of sensors, detectors, computers, PLCs, card readers, etc., which need to be connected to each other to form a control network. Usually the communication interfaces provided by these devices are RS-232 or RS-485. . The wireless LAN device uses an isolated signal converter to convert the RS-232 serial signal of the industrial device with the wireless LAN and Ethernet signals, conforms to the wireless LAN IEEE802.11b and the Ethernet IEEE802.3 standard, and supports the standard TCP/IP network. The communication protocol effectively extends the networking communication capabilities of industrial equipment.
The combination of computer network technology, wireless technology and smart sensor technology has created a new concept of "network-based smart sensor based on wireless technology". This wireless technology-based networked smart sensor enables industrial field data to be transmitted, distributed and shared directly over the network via wireless links. Wireless LAN technology can provide high-bandwidth wireless data links and flexible network topologies for communication between various intelligent field devices, mobile robots, and various automation devices in a factory environment, effectively making up for some special environments. The lack of wired networks further improves the communication performance of industrial control networks.
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