Digital Automatic Pipe Welding Platform For Communication Systems

As a basic material processing method, welding occupies an important position in the modern industrial production. In recent years, in order to catch up with international advanced level, get rid of dependence on foreign, domestic companies are aiming at the international advanced level of welding technology, and many high-techs are integrated and apllied in the traditional welding industry such as digital, intelligence, information technology, flexible technology, and develop the research about intelligent automatic welding control system. In this way, digital, automatic, and intelligent welding process has become a modern trend.From the larger environment, the emergence and development of digital welding machine is the inevitable result of technological development. With the late 90s of 20 century, Austria Fronius digital welding machine enters the Chinese market, especially the application of digital welding machine attracts more people's attention.In view of this, Kunshan City, Jiangsu Province, huaheng welding technology companies and universities such as Tsinghua University, started research and development based on ARM+DSP digital automatic pipe welding platform. The essay is drawn from a part of it, which is the digital control platform in the communication pipe welding systems.This paper firstly detailed describes pipe welding control platform of digital communication systems, including the concept of digital welding machine, pipe welding characteristics and principles, and stresses the control platform of the communication systems research content and functionality.Secondly, the paper makes a brief introduction about the communication bus-CAN (Controller Area Network) bus which is used in the system, and designs the hardware of CAN bus in the communication system. And, the thesis studies and researches the scheduling algorithm of bus based on the analysis of its real-time; and uses the dedicated simulation software of CAN Bus-German Vector's CANoe software, which is carried out simulation about part of the data transmission in the welding process, and analyses the data communication situation of bus. Through the simulation study about the transmission of information of CAN bus network, we solve the issue that low-priority message could not been sent at high bus load rate, and it is demonstrated that we will make use of the mixed scheduling algorithm is feasible. So, it ensures the real-time requirements of the different message in the welding process.As the welding work in poor conditions, and the high-frequency arc welding process generated the high-frequency interference, which mak control system not work, so the welding platform, interference issues were discussed. In this paper, both hardware and software interference have taken a series of effective measures to enhance the system's anti-jamming capability.Finally, for currently popular communications bus protocol on the market, we conduct a simple study about industrial Ethernet, and on this basis, discuss its application in welding.