以太网技术在物品场景中的应用与Profibus现场总线的对比分析

随着网络技术的不断发展和工业控制领域对网络功能要求的提高，以太网技术正逐步进入工业控制领域，形成了一种新的以太网控制网络技术。这种敞开性使得工业控制网络与企业信息网络之间无缝整合具有不可比拟的优势。

以太网作为一种支持一切流行网络协议的技能，因其传输速度快、能耗低、便于安装兼容性好等优点，在商业系统中得到广泛应用。近年来，以太网进入了操控范畴，形成了新式的以太网操控网络技能，这主要是由于工业自动化系统向分布式、智能化操作方面发展，开放和透明的通信协议成为了必然要求。

引入工业操控领域，以太网技能显示出显著优势：1. 以太网是一个全开放、全数字化的网络，可以轻松实现不同厂商设备之间互联；2. 以太网能够实现无缝连接Industrial control networks with enterprise information networks, forming a unified and open network like the one shown in Figure 2; 3. Hardware and software costs are low because the technology is already mature, supported by various software development environments and hardware devices for users to choose from; 4. Communication speed is high, with gigabit Ethernet widely applied, starting to develop terabit Ethernet skills, and even research on 10G Ethernet whose rate is much faster than current fieldbus systems; 5. The potential for sustainable development is great in this era of rapid change in information.

However, there are also some challenges:1 real-time issues: With CSMA/CD medium access control method used by Ethernet, it's difficult to meet the real-time requirements of industrial control systems where multiple nodes compete for the bus equally when it's idle;2 adaptability to industrial environments: Ethernet was designed for office environments and needs anti-interference ability and exterior design suitable for industrial sites;3 application layer protocols: Industrial automation requires real-time communication between field devices which may not be compatible with existing network protocols' data structures;4 safety issues: In hazardous areas such as oil refineries or chemical plants using flammable or explosive materials, physical safety must be considered when using Industrial Ethernet;5 Quality of Service (QOS): As signals at factory floors now include Audio & low-resolution Video signals besides digital & analog quantities requiring different QOS levels.

With ongoing technological advancements these problems have been largely addressed:

1 Rapidly developing fast switching-type Ethernet technologies that use full-duplex communication can avoid collisions altogether while facilitating priority mechanisms ensuring optimal bandwidth utilization;

2 Manufacturers provide specialized anti-interference methods making equipment more suitable for industrial demands;

3 Users can adjust TCP/IP protocol stacks according to their needs adding or removing layers as needed;

4 Equipment producers supply sealed ruggedized components along with connectors specifically designed to address physical security concerns;

5 Addressing user authentication encryption firewalls etc., enhancing overall network security but further research on securing Industrial Automation Networks remains necessary;

The advantages of an Industrial Ethernet control system over traditional ones lie in its applicability across various industries. As integrated circuits ,IndustrialEthernet& embedded Internet technologies continue advancing into depth based-on-Ethernet controls will become a reality soonest expected becoming the most open structure within industrial controls.

This new type of networking aligns well with developments in Profibus-based systems but presents a revolutionary approach toward traditional industrial networking architecture likely bringing about new horizons within industries though certain domains like automotive manufacturing CNC machines due harsh working conditions high real time reliability requirements remain unsuitable For IndustrialEthernet At present trends clearly show that IndustrialEthernet will undoubtedly enter fields traditionally dominated by Profibus however they might coexist indefinitely providing what could best described as hybridised mixed-networked Control Systems